<SEC-DOCUMENT>0001292814-24-002425.txt : 20240617
<SEC-HEADER>0001292814-24-002425.hdr.sgml : 20240617
<ACCEPTANCE-DATETIME>20240617060533
ACCESSION NUMBER:		0001292814-24-002425
CONFORMED SUBMISSION TYPE:	6-K
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20240331
FILED AS OF DATE:		20240617
DATE AS OF CHANGE:		20240617

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COMPANHIA DE SANEAMENTO BASICO DO ESTADO DE SAO PAULO-SABESP
		CENTRAL INDEX KEY:			0001170858
		STANDARD INDUSTRIAL CLASSIFICATION:	WATER SUPPLY [4941]
		ORGANIZATION NAME:           	01 Energy & Transportation
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			D5
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		6-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31317
		FILM NUMBER:		241046874

	BUSINESS ADDRESS:	
		STREET 1:		RUA COSTA CARVALHO, 300
		STREET 2:		SAO PAULO
		CITY:			SP
		STATE:			D5
		ZIP:			05429-900
		BUSINESS PHONE:		011-55-11-3388-8000

	MAIL ADDRESS:	
		STREET 1:		RUA COSTA CARVALHO, 300
		STREET 2:		SAO PAULO
		CITY:			SP
		STATE:			D5
		ZIP:			05429-900
</SEC-HEADER>
<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>sbsitr1q24_6k1.htm
<DESCRIPTION>6-K
<TEXT>
<HTML>
<HEAD>
<TITLE></TITLE>
</HEAD>
<BODY>



<HR align=left color=#000000 SIZE=2 noShade>



<DIV>&nbsp;</DIV>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: small; color: #000000"><B>SECURITIES AND EXCHANGE COMMISSION
</B></FONT></DIV>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: small; color: #000000"><B>Washington, DC 20549 </B></FONT></DIV>

<DIV>&nbsp;</DIV>

<HR align=center color=#000000 SIZE=1 width="25%" noShade>



<DIV>&nbsp;</DIV>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: small; color: #000000"><B>FORM 6-K</B></FONT></DIV>

<DIV>&nbsp;</DIV>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: small; color: #000000"><B>REPORT OF FOREIGN ISSUER</B><BR><B>PURSUANT
TO RULE 13a-16 OR 15d-16 OF THE</B></FONT></DIV>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: small; color: #000000"><B>SECURITIES EXCHANGE ACT OF 1934</B></FONT></DIV>

<DIV>&nbsp;</DIV>

<DIV align=center><DIV><FONT STYLE="font-family: Times New Roman; font-size: x-small; color: #000000"><B>For&nbsp;June, 2024</B></FONT></DIV><FONT color=#000000 size=2 face="Times New Roman"><B>(Commission File No. 1-31317) </B></FONT></DIV>

<DIV>&nbsp;</DIV>

<HR align=center color=#000000 SIZE=1 width="25%" noShade>



<DIV>&nbsp;</DIV>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: small; color: #000000"><B>Companhia de Saneamento B&#225;sico
do Estado de S&#227;o Paulo - SABESP </B></FONT></DIV>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: x-small; color: #000000"><I>(Exact name of registrant as specified
in its charter) </I></FONT></DIV>

<DIV>&nbsp;</DIV>

<DIV align=center></DIV>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: small; color: #000000"><B>Basic Sanitation Company of the State
of Sao Paulo - SABESP </B></FONT></DIV>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: x-small; color: #000000"><I>(Translation of Registrant's name
into English) </I></FONT></DIV>

<DIV>&nbsp;</DIV>

<HR align=center color=#000000 SIZE=1 width="25%" noShade>

<BR>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: x-small; color: #000000"><B>Rua Costa Carvalho, 300 <BR>S&#227;o
Paulo, S.P., 05429-900 <BR>Federative Republic of Brazil </B></FONT></DIV>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: x-small; color: #000000"><I>(Address of Registrant's principal
executive offices) </I></FONT></DIV><BR>

<HR align=center color=#000000 SIZE=1 width="25%" noShade>

<BR>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: x-small; color: #000000">Indicate by check mark whether the registrant
files or will file <BR>annual reports under cover Form 20-F or Form 40-F. <BR><BR>Form 20-F ___X___ Form 40-F ______</FONT></DIV>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: x-small; color: #000000">Indicate by check mark if the registrant
is submitting the Form 6-K <BR>in paper as permitted by Regulation S-T Rule 101(b)(1)__.</FONT></DIV>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: x-small; color: #000000">Indicate by check mark if the registrant
is submitting the Form 6-K <BR>in paper as permitted by Regulation S-T Rule 101(b)(7)__.</FONT></DIV>

<P></P>

<P align=center><FONT STYLE="font-family: 'Times New Roman, Times, Serif'; font-size: x-small">Indicate by check mark whether the registrant
by furnishing the <BR>information contained in this Form is also thereby furnishing the <BR>information to the Commission pursuant to
Rule 12g3-2(b) under <BR>the Securities Exchange Act of 1934. <BR><BR>Yes ______ No ___X___</FONT></P>

<P></P>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: x-small; color: #000000">If "Yes" is marked, indicated below
the file number assigned to the<BR>registrant in connection with Rule 12g3-2(b):</FONT></DIV>


<!-- Field: Page; Sequence: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0 0 6pt; text-align: center"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%">
<TR STYLE="vertical-align: top; text-align: left">
  <TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly
                         Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD>
  <TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version
                         : 1</P>
</TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD>&nbsp;</TD>
  <TD>&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 11pt Arial, Helvetica, Sans-Serif; margin: 0 0 12pt 0.5pt; text-align: justify"></P>

<P STYLE="font: 11pt Arial, Helvetica, Sans-Serif; margin: 0 0 12pt 0.5pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 14pt Times New Roman, Times, Serif; margin: 3.9pt 0 0 7.35pt"><B>Table of Contents</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0.3pt 0 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Georgia, Times, Serif; width: 100%">
<TR STYLE="vertical-align: top; text-align: left">
  <TD COLSPAN="2"><P STYLE="font: 11pt Arial, Helvetica, Sans-Serif; margin: 8.2pt 0 0 7.35pt"><B>Company Information</B></P>
</TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.75pt 0 0 17.35pt">Capital Breakdown&#9;</P></TD>
  <TD STYLE="text-align: right; width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.75pt 0 0 17.35pt">1</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD COLSPAN="2"><P STYLE="font: 11pt Arial, Helvetica, Sans-Serif; margin: 10.85pt 0 0 7.35pt"><B>Parent Company&rsquo;s Financial
                  Statements</B></P>
</TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.75pt 0 0 17.35pt">Statement of Financial Position &ndash; Assets&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.75pt 0 0 17.35pt">2</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.85pt 0 0 17.35pt">Statement of Financial Position &ndash; Liabilities&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.85pt 0 0 17.35pt">3</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 11pt 0 0 17.35pt">Income Statement&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 11pt 0 0 17.35pt">5</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 17.35pt">Statement of Comprehensive Income&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 17.35pt">6</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.85pt 0 0 17.35pt">Statement of Cash Flows (Indirect Method)&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.85pt 0 0 17.35pt">7</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD COLSPAN="2"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 17.35pt"><B>Statement of Changes in Equity</B></P>
</TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.95pt 0 0 27.35pt">01/01/2024 to 03/31/2024&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.95pt 0 0 27.35pt">9</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 27.35pt">01/01/2023 to 03/31/2023&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 27.35pt">10</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 17.35pt">Value Added Statement&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 17.35pt">11</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD COLSPAN="2"><P STYLE="font: 11pt Arial, Helvetica, Sans-Serif; margin: 0.15in 0 0 7.35pt"><B>Consolidated Financial Statements</B></P>
</TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.75pt 0 0 17.35pt">Statement of Financial Position &ndash; Assets&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.75pt 0 0 17.35pt">12</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 11pt 0 0 17.35pt">Statement of Financial Position &ndash; Liabilities&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 11pt 0 0 17.35pt">13</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 17.35pt">Income Statement&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 17.35pt">15</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.85pt 0 0 17.35pt">Statement of Comprehensive Income&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.85pt 0 0 17.35pt">16</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 11pt 0 0 17.35pt">Statement of Cash Flows (Indirect Method)&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 11pt 0 0 17.35pt">17</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD COLSPAN="2"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.85pt 0 0 17.35pt"><B>Statement of Changes in Equity</B></P>
</TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 27.35pt">01/01/2024 to 03/31/2024&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 27.35pt">19</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 27.35pt">01/01/2023 to 03/31/2023&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 27.35pt">20</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.95pt 0 0 17.35pt">Value Added Statement&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.95pt 0 0 17.35pt">21</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 7.35pt">Comments on the Company&rsquo;s Performance&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 7.35pt">22</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 7.35pt">Notes to the Quarterly Information&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 7.35pt">32</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 7.35pt">Comments on the Company&rsquo;s Projections&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 7.35pt">95</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.95pt 0 0 7.35pt">Other Information Deemed as Relevant by the Company&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.95pt 0 0 7.35pt">96</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD COLSPAN="2"><P STYLE="font: 11pt Arial, Helvetica, Sans-Serif; margin: 0.15in 0 0 7.35pt"><B>Reports and Statements</B></P>
</TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.75pt 0 0 17.35pt">Unqualified Report on Special Review&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.75pt 0 0 17.35pt">98</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 17.35pt">Executive Officers&rsquo; Statement on the Financial
      Statements&#9;</P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.9pt 0 0 17.35pt">100</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 11pt 0 0 17.35pt">Executive Officers&rsquo; Statement on the Report of
      Independent Registered Public Accounting Firm&#9;<BR STYLE="clear: both"></P></TD>
  <TD STYLE="text-align: right"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 11pt 0 0 17.35pt">101</P></TD></TR>
</TABLE>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0.3pt 0 0"><BR STYLE="clear: both"></P>

<!-- Field: Page; Sequence: 2 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->
<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%">
<TR STYLE="vertical-align: top; text-align: left">
  <TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly
                         Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD>
  <TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version
                         : 1</P>
</TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD>&nbsp;</TD>
  <TD>&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 4.1pt 0 0 7.35pt"><B>Company Information / Capital Breakdown</B></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 8.5pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #D2D2D2">
    <TD STYLE="width: 27%; padding-top: 3.7pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Number
    of Shares</B></FONT></TD>
    <TD STYLE="width: 73%; padding-top: 3.7pt; padding-right: 278.25pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Current
    Quarter</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #D2D2D2">
    <TD STYLE="padding-left: 2pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(Unit)</B></FONT></TD>
    <TD STYLE="padding-right: 278.25pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>03/31/2024</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: gainsboro">
    <TD STYLE="padding-top: 3.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Paid-up
    Capital</B></FONT></TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Common</B></FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 278.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">683,509,869</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: darkgray 1pt dashed; padding-top: 2.35pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Preferred</B></FONT></TD>
    <TD STYLE="border-bottom: darkgray 1pt dashed; padding-top: 2.35pt; padding-right: 278.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: whitesmoke">
    <TD STYLE="padding-top: 1.25pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Total</B></FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 278.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">683,509,869</FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: gainsboro">
    <TD STYLE="padding-top: 3.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Treasury
    Shares</B></FONT></TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Common</B></FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 278.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: darkgray 1pt dashed; padding-top: 2.35pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Preferred</B></FONT></TD>
    <TD STYLE="border-bottom: darkgray 1pt dashed; padding-top: 2.35pt; padding-right: 278.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: whitesmoke">
    <TD STYLE="padding-top: 1.3pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Total</B></FONT></TD>
    <TD STYLE="padding-top: 1.3pt; padding-right: 278.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">0</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 3; Options: NewSection -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->1<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Parent Company&rsquo;s Financial Statements
/ Statement of Financial Position - Assets</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.35pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; padding-left: 2pt; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 50%; padding-left: 2.25pt; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 22%; padding-right: 20.65pt; text-align: right; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Current
    Quarter</B></FONT></TD>
    <TD STYLE="width: 18%; padding-right: 1.85pt; text-align: right; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Previous
    Year</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-left: 2pt; line-height: 83%">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 20.65pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>03/31/2024</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 1.9pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>12/31/2023</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.2pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Total
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">64,971,897</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">61,397,861</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Current
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">10,611,503</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,779,332</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Cash
    and Cash Equivalents</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,019,256</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">838,338</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Investments</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">4,169,871</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,425,921</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.02.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Investments Valued at Amortized Cost</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">4,169,871</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,425,921</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Accounts
    Receivable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,851,513</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,842,235</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.03.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Trade
    Receivables</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,584,889</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,580,962</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.03.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Receivables</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">266,624</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">261,273</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.03.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Related-Party
    Balances</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">266,624</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">261,273</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Inventories</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">121,610</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">85,953</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.06</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Recoverable
    Taxes</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">328,158</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">494,645</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.06.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Current
    Recoverable Taxes</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">328,158</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">494,645</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.08</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Current Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">121,095</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">92,240</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.08.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">121,095</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">92,240</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.08.03.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Restricted
    Cash</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">45,694</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">54,944</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.08.03.20</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">75,401</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">37,296</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Noncurrent
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">54,360,394</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">53,618,529</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Long-Term
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">9,346,121</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">9,070,160</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Accounts
    Receivable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">345,801</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">272,436</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Trade
    Receivables</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">345,801</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">272,436</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.07</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Deferred
    Taxes</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">115,285</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">98,076</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.07.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Deferred
    Income Tax and Social Contribution</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">115,285</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">98,076</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.09</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Receivables
    from Related Parties</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">932,308</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">935,272</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.09.03</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Receivables
    from Controlling Shareholders</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">932,308</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">935,272</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.10</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Noncurrent Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,952,727</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,764,376</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.10.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Escrow
    Deposits</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">124,740</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">130,979</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.10.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Water
    and Basic Sanitation National Agency &ndash; ANA</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,879</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,673</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.10.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Contract
    Asset </FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,582,365</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,393,096</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.10.20</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">243,743</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">237,628</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Investments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">217,195</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">208,541</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Equity
    Interest</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">170,529</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">161,863</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.02.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Equity
    Interest in Jointly-Owned Subsidiaries</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">139,412</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">130,520</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.02.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Investments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">31,117</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">31,343</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Investment
    Properties</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">46,666</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">46,678</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Property,
    Plant and Equipment</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">484,312</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">474,559</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Intangible
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">44,312,766</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">43,865,269</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Intangible
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">44,312,766</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">43,865,269</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.04.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Concession
    Agreements</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,109,187</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,143,877</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.04.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Program
    Contracts</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">22,249,066</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">21,896,523</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.04.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Service
    Contracts</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">20,239,064</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">20,193,585</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.04.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Software
    License of Use</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">488,758</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">513,224</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.04.01.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Right
    of Use</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">226,691</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">118,060</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 4 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->2<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Parent Company&rsquo;s Financial Statements
/ Statement of Financial Position &ndash; Liabilities</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.35pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; padding-left: 2pt; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 50%; padding-left: 2.25pt; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 22%; padding-right: 20.6pt; text-align: right; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Current
    Quarter</B></FONT></TD>
    <TD STYLE="width: 18%; padding-right: 1.8pt; text-align: right; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Previous
    Year</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-left: 2pt; line-height: 83%">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 20.6pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>03/31/2024</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 1.85pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>12/31/2023</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.2pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Total
    Liabilities</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">64,971,897</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">61,397,861</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Current
    Liabilities</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,580,531</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,331,681</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Social
    and Labor Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">742,587</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">807,440</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Social
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">34,469</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">65,413</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Labor
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">708,118</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">742,027</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Suppliers</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">491,038</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">456,064</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Domestic
    Suppliers</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">491,038</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">456,064</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Tax
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">617,923</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">511,468</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.03.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Federal
    Tax Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">612,525</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">499,340</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.03.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Income
    Tax and Social Contribution Payable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">388,734</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">205,587</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.03.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Pis-Pasep
    and Cofins Payable</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">136,927</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">141,576</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.03.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">INSS
    (Social Security Contribution) Payable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">42,136</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">44,556</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.03.01.20</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Federal Taxes</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">44,728</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">107,621</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.03.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Municipal
    Tax Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,398</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">12,128</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Borrowings
    and Financing</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,716,361</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,616,406</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Borrowings
    and Financing</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,294,586</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,291,129</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.04.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">In
    Local Currency</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,048,287</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,041,428</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.04.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">In Foreign
    Currency</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">246,299</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">249,701</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.04.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Debentures</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,215,311</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,206,894</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.04.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financing
    through Lease</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">206,464</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">118,383</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,926,646</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,875,936</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Payables
    to Related Parties</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,139</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,354</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Payables
    to Controlling Shareholders</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,139</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,354</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,923,507</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,874,582</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Dividends
    and Interest on Capital Payable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">837,391</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">837,391</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Services
    Payable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">836,294</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">749,226</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Refundable
    Amounts</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">28,312</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">28,522</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Program
    Contract Commitments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">20,896</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">21,969</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02.07</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Public-Private
    Partnership - PPP</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">435,671</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">487,926</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02.09</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Indemnities</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">11,170</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,750</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02.20</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">753,773</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">740,798</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,085,976</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,064,367</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Tax,
    Social Security, Labor, and Civil Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">708,296</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">685,822</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Tax
    Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">37,712</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">36,793</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Pension
    Plan and Labor Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">538,889</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">540,427</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Civil
    Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">131,695</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">108,602</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">377,680</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">378,545</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.02.03</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions
    for Environmental Liabilities and Decommissioning</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">22,718</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">20,561</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions
    for Customers</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">158,667</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">160,883</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.02.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions
    for Suppliers</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">196,295</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">197,101</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Noncurrent
    Liabilities</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">25,710,695</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">23,208,804</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Borrowings
    and Financing</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">19,307,946</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">16,919,944</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Borrowings
    and Financing</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">10,138,795</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">10,448,915</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.01.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">In Local
    Currency</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,754,002</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,952,725</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.01.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">In
    Foreign Currency</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,384,793</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,496,190</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 5 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->3<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Parent Company&rsquo;s Financial Statements
/ Statement of Financial Position &ndash; Liabilities</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.35pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; padding-left: 2pt; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 50%; padding-left: 2.25pt; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 22%; padding-right: 20.6pt; text-align: right; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Current
    Quarter</B></FONT></TD>
    <TD STYLE="width: 18%; padding-right: 1.8pt; text-align: right; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Previous
    Year</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-left: 2pt; line-height: 83%">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 20.6pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>03/31/2024</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 1.85pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>12/31/2023</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.2pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Debentures</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,811,528</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6,137,902</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financing
    through Lease</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">357,623</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">333,127</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,625,524</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,526,795</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,625,524</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,526,795</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Pension
    Plan Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,131,230</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,142,871</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Program
    Contract Commitments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">12,139</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">12,047</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Public-Private
    Partnership - PPP</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,787,032</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,798,688</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02.07</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Indemnities</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">35,885</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">14,460</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02.08</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Labor
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">58,636</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">67,755</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02.09</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Deferred
    Cofins/Pasep</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">169,265</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">164,097</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02.20</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">431,337</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">326,877</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">777,225</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">762,065</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Tax,
    Social Security, Labor, and Civil Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">236,379</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">235,430</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Tax
    Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">57,926</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">46,754</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Pension
    Plan and Labor Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">171,002</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">170,471</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Civil
    Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,451</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">18,205</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">540,846</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">526,635</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.02.03</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions
    for Environmental Liabilities and Decommissioning</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">488,006</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">472,124</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions
    for Customers</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">4,388</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,312</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.02.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions
    for Suppliers</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">48,452</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">46,199</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Equity</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">30,680,671</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">29,857,376</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Paid-Up
    Capital</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">15,000,000</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">15,000,000</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Profit
    Reserves</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">14,711,014</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">14,711,014</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Legal
    Reserve</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,864,604</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,864,604</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03.04.08</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Additional
    Dividend Proposed</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">93,047</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">93,047</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03.04.10</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Reserve
    for Investments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">12,753,363</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">12,753,363</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Retained
    Earnings/Accumulated Losses</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Equity
    Valuation Adjustments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">146,362</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">146,362</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 6 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->4<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Parent Company&rsquo;s Financial Statements
/ Income Statement</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.35pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 9%; padding-right: 7.45pt; padding-left: 2pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 48%; padding-left: 7.75pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 22%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 8.25pt 0 0; text-align: right"><B>YTD Current</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 5.75pt 0 0; text-align: right"><B>Year</B></P></TD>
    <TD STYLE="width: 21%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 4.4pt 0 0; text-align: right"><B>YTD Previous</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 1.95pt 0 0; text-align: right"><B>Year</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 5.75pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2024
    to 03/31/2024</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 2pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2023
    to 03/31/2023</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.2pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.01</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Revenue
    from Sales and/or Services</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6,551,713</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,698,369</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Cost
    of Sales and/or Services</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-3,971,227</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-3,653,723</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Cost
    of Sales and/or Services</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-2,664,855</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-2,500,708</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Construction
    Costs</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-1,306,372</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-1,153,015</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Gross
    Profit</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,580,486</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,044,646</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Operating
    Expenses/Income</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-921,812</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-652,173</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Selling
    Expenses</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-400,361</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-388,462</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Selling
    Expenses</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-209,843</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-225,657</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Allowance
    for Doubtful Accounts</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-190,518</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-162,805</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">General
    and Administrative Expenses</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-537,374</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-284,679</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.04</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Operating Income</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">10,291</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">20,352</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Operating Income</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">11,361</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">23,045</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.04.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Cofins
    and Pasep</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-1,070</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-2,693</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Operating Expenses</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-3,205</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-5,718</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Equity
    results of investments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,837</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6,334</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Income
    before Financial Result and Taxes</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,658,674</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,392,473</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Result</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-335,792</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-259,528</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Revenue</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">249,973</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">219,119</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Revenue</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">261,587</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">230,108</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Exchange
    Variation Gains</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-201</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Cofins
    and Pasep</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-11,615</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-10,788</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Expenses</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-585,765</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-478,647</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Expenses</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-592,097</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-562,471</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Exchange
    Variation Losses</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6,332</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">83,824</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.07</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Profit
    before Taxes on Income</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,322,882</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,132,945</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.08</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Income
    Tax and Social Contribution</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-499,587</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-385,733</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.08.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Current</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-516,796</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-383,488</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.08.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Deferred</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">17,209</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-2,245</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.09</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Net
    Income from Continuing Operations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">747,212</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,11</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Profit/Loss
    for the Period</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">747,212</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.99</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Earnings
    per Share - (Reais/Share)</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.99.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Basic
    Earnings per Share</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.99.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Common
    </FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.20451</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.0932</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.99.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Diluted
    Earnings per Share</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.99.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Common
    </FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.20451</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.0932</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 7 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->5<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Parent Company&rsquo;s Financial Statements
/ Statement of Comprehensive Income</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 4.35pt 1.7pt 0 7.35pt"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top; text-align: left">
  <TD STYLE="width: 9%"><P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 4.35pt 1.7pt 0 7.35pt"><B>Code &#9;</B></P></TD>
  <TD STYLE="width: 48%"><P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 4.35pt 1.7pt 0 7.35pt"><B>Description</B></P></TD>
  <TD STYLE="width: 22%"><P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 4.35pt 1.7pt 0 7.35pt"><B>YTD Current <BR>
01/01/2024 to 03/31/2024</B></P></TD>
  <TD STYLE="width: 21%"><P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 4.35pt 1.7pt 0 7.35pt"><B>YTD Previous Year<BR>
01/01/2023 to 03/31/2023</B></P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 3.75pt 0 0 7.35pt">4.01&#9;</P></TD>
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 3.75pt 0 0 7.35pt">Net Income for the Period&#9;</P></TD>
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 3.75pt 0 0 7.35pt">823,295&#9;</P></TD>
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 3.75pt 0 0 7.35pt">747,212</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 3.8pt 0 0 7.35pt">4.03&#9;</P></TD>
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 3.8pt 0 0 7.35pt">Comprehensive Income for the Period&#9;</P></TD>
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 3.8pt 0 0 7.35pt">823,295&#9;</P></TD>
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 3.8pt 0 0 7.35pt">747,212</P></TD></TR>
</TABLE>

<!-- Field: Page; Sequence: 8 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->6<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Parent Company&rsquo;s Financial Statements /
Statement of Cash Flows &ndash; Indirect Method</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.35pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 9%; padding-right: 7.45pt; padding-left: 2pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 49%; padding-left: 7.75pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 21%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 8.25pt 0 0; text-align: right"><B>YTD Current</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 5.75pt 0 0; text-align: right"><B>Year</B></P></TD>
    <TD STYLE="width: 21%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 4.4pt 0 0; text-align: right"><B>YTD Previous</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 1.95pt 0 0; text-align: right"><B>Year</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 5.75pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2024
    to 03/31/2024</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 2pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2023
    to 03/31/2023</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.2pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Net
    Cash from Operating Activities</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,395,190</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">395,306</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Cash
    from Operations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,825,877</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,513,490</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Profit
    before Income Tax and Social Contribution</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,322,882</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,132,945</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provision
    and Inflation Adjustments on Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">83,945</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">70,031</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Finance
    Charges from Customers</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-109,237</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-95,653</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.05</FONT></TD>
    <TD STYLE="padding-top: 2pt; padding-right: 11pt; padding-left: 7.75pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Residual
    Value of Property, Plant and Equipment, Intangible Assets, and Investment Properties Written-off</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">918</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,515</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.06</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Depreciation
    and Amortization</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">772,552</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">657,145</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.07</FONT></TD>
    <TD STYLE="padding-top: 2pt; padding-right: 11pt; padding-left: 7.75pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Interest
    on Borrowings and Financing Payable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">344,775</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">316,805</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.65pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.08</FONT></TD>
    <TD STYLE="padding-top: 1.9pt; padding-left: 7.75pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Inflation
    Adjustment and Exchange Gains (Losses) on Borrowings and Financing</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">47,701</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-13,316</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.09</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Interest
    and Inflation Adjustments on Liabilities</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,271</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6,915</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.10</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Interest
    and Inflation Adjustments on Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-60,490</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-28,976</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.11</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Allowance
    for Doubtful Accounts</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">190,518</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">162,805</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.12</FONT></TD>
    <TD STYLE="padding-top: 2pt; padding-left: 7.75pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provision
    for Consent Decree (TAC) and Knowledge Retention Program (PRC)</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-107,796</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-345</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.13</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Equity
    results of investments</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-8,837</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-6,334</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.14</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Interest
    and Inflation Adjustment - PPP</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">145,823</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">123,045</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.15</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Adjustments</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">4,346</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">4,119</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.16</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Transfer
    to the S&atilde;o Paulo Municipal Government</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">174,673</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">155,387</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.17</FONT></TD>
    <TD STYLE="padding-top: 2pt; padding-right: 3.5pt; padding-left: 7.75pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Construction
    Margin on Intangible Assets Arising from Concession Agreements</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-30,046</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-26,519</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.18</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Pension
    Plan Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">48,879</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">51,921</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Changes
    in Assets and Liabilities</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-631,688</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-1,460,999</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Trade
    Receivables</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-152,421</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-183,680</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Related-Party
    Balances and Transactions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6,591</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">10,172</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Inventories</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-35,657</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6,951</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Taxes
    Recoverable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">166,487</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-23,531</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-43,426</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-33,323</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Escrow
    Deposits</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">12,497</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-742</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.08</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Trade
    Payables and Contractors</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-418,697</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-414,033</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.09</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Social
    and Labor Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">33,630</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-2,630</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.10</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Pension
    Plan Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-60,520</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-58,324</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.11</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Taxes
    and Contributions Payable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-84,938</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-225,360</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.12</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Services
    Payable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-87,605</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-274,097</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.13</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">74,379</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-232,389</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.14</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-47,176</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-31,604</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.15</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Deferred
    Cofins/Pasep</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,168</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,591</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-798,999</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-657,185</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.03.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Interest
    Paid</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-473,596</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-543,850</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.03.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Income
    Tax and Social Contribution Paid</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-325,403</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-113,335</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Net
    Cash from Investing Activities</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-2,282,568</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-583,553</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Acquisition
    of Contract Asset and Intangible Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-571,059</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-570,332</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Acquisition
    of Property, Plant and Equipment</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-15,911</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-30,954</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Restricted
    Cash</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">9,250</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.95pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-10,827</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 9 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->7<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Parent Company&rsquo;s Financial Statements /
Statement of Cash Flows &ndash; Indirect Method</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.35pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 9%; padding-right: 7.45pt; padding-left: 2pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 43%; padding-left: 7.75pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 27%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 8.3pt 0 0; text-align: right"><B>YTD Current</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 5.8pt 0 0; text-align: right"><B>Year</B></P></TD>
    <TD STYLE="width: 21%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 4.45pt 0 0; text-align: right"><B>YTD Previous</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 2pt 0 0; text-align: right"><B>Year</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 5.8pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2024
    to 03/31/2024</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 2.05pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2023
    to 03/31/2023</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.2pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.02.07</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Investments</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-1,704,848</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">28,560</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Net
    Cash from Financing Activities</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,068,296</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-842,788</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.03.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Funding</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,939,695</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">121,611</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.03.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Amortization</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-660,026</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-716,239</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.03.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Public-Private
    Partnership - PPP</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-209,734</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-208,764</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.03.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Program
    Contract Commitments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-1,639</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-39,396</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Increase
    (Decrease) in Cash and Cash Equivalents</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,180,918</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-1,031,035</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.05.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Opening
    Balance of Cash and Cash Equivalents</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">838,338</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,867,485</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.05.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Closing
    Balance of Cash and Cash Equivalents</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,019,256</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">836,450</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 10 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->8<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Parent Company&rsquo;s Financial Statements
/ Statement of Changes in Equity - 01/01/2024 to 03/31/2024</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.35pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 5%; border-bottom: black 1pt solid; padding-right: 5.5pt; padding-left: 2pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 27%; border-bottom: black 1pt solid; padding-left: 5.95pt; line-height: 65%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 13%; border-bottom: black 1pt solid; padding-left: 56.85pt; line-height: 96%; text-indent: -4.7pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt"><B>Paid-up
    Capital</B></FONT></TD>
    <TD STYLE="width: 12%; border-bottom: black 1pt solid; padding-right: 14.8pt; padding-left: 8.8pt; text-align: justify; line-height: 96%; text-indent: 4.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt"><B>Capital
    Reserves, Options Granted, and Treasury Shares</B></FONT></TD>
    <TD STYLE="width: 11%; border-bottom: black 1pt solid; padding-right: 11.7pt; text-align: right; line-height: 65%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt"><B>Profit
    Reserves</B></FONT></TD>
    <TD STYLE="width: 11%; border-bottom: black 1pt solid"><P STYLE="font: 7pt/64% Arial, Helvetica, Sans-Serif; margin: 0 15.8pt 0 0; text-align: right"><B>Retained Earnings/Accumulated</B></P>
    <P STYLE="font: 7pt/66% Arial, Helvetica, Sans-Serif; margin: 0 13.85pt 0 0; text-align: right"><B>Losses</B></P></TD>
    <TD STYLE="width: 11%; border-bottom: black 1pt solid"><P STYLE="font: 7pt/64% Arial, Helvetica, Sans-Serif; margin: 0 16.2pt 0 0; text-align: right"><B>Other Comprehensive</B></P>
    <P STYLE="font: 7pt/66% Arial, Helvetica, Sans-Serif; margin: 0 14.2pt 0 0; text-align: right"><B>Income</B></P></TD>
    <TD STYLE="width: 10%; border-bottom: black 1pt solid; padding-right: 1.9pt; text-align: right; line-height: 65%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt"><B>Equity</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.25pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.01</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-left: 5.95pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Opening
    Balances</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 8.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">15,000,000</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 14.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">14,711,014</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 13.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 14.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">146,362</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">29,857,376</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.95pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.02</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-left: 5.95pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Previous
    Year Adjustments</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 8.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 11.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 13.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.95pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.03</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-left: 5.95pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Adjusted
    Opening Balances</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 8.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">15,000,000</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">14,711,014</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 13.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">146,362</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">29,857,376</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.9pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.04</FONT></TD>
    <TD STYLE="padding-top: 2.9pt; padding-left: 5.95pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Capital
    Transactions with Partners</FONT></TD>
    <TD STYLE="padding-top: 2.9pt; padding-right: 8.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.9pt; padding-right: 14.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.9pt; padding-right: 11.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.9pt; padding-right: 13.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.9pt; padding-right: 14.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.9pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.95pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.05</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-left: 5.95pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Total
    Comprehensive Income</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 8.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 11.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 13.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">823,295</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.95pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.05.01</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-left: 5.95pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Net
    Income for the Period</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 8.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 11.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 13.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">823,295</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.95pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.06</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-left: 5.95pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Internal
    Changes in Equity</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 8.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 11.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 13.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.95pt; padding-left: 2pt; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.07</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-left: 5.95pt; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Closing
    Balances</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 8.8pt; text-align: right; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">15,000,000</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.85pt; text-align: right; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 11.75pt; text-align: right; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">14,711,014</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 13.85pt; text-align: right; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.2pt; text-align: right; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">146,362</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 1.95pt; text-align: right; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">30,680,671</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 11 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->9<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Parent Company&rsquo;s Financial Statements
/ Statement of Changes in Equity - 01/01/2023 to 03/31/2023</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.35pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 5%; border-bottom: black 1pt solid; padding-right: 5.5pt; padding-left: 2pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 27%; border-bottom: black 1pt solid; padding-left: 5.95pt; line-height: 65%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 13%; border-bottom: black 1pt solid; padding-left: 56.85pt; line-height: 96%; text-indent: -4.7pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt"><B>Paid-up
    Capital</B></FONT></TD>
    <TD STYLE="width: 12%; border-bottom: black 1pt solid; padding-right: 14.8pt; padding-left: 8.8pt; text-align: justify; line-height: 96%; text-indent: 4.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt"><B>Capital
    Reserves, Options Granted, and Treasury Shares</B></FONT></TD>
    <TD STYLE="width: 11%; border-bottom: black 1pt solid; padding-right: 11.7pt; text-align: right; line-height: 65%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt"><B>Profit
    Reserves</B></FONT></TD>
    <TD STYLE="width: 11%; border-bottom: black 1pt solid"><P STYLE="font: 7pt/64% Arial, Helvetica, Sans-Serif; margin: 0 15.8pt 0 0; text-align: right"><B>Retained Earnings/Accumulated</B></P>
    <P STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin: 0 13.85pt 0 0; text-align: right"><B>Losses</B></P></TD>
    <TD STYLE="width: 11%; border-bottom: black 1pt solid"><P STYLE="font: 7pt/64% Arial, Helvetica, Sans-Serif; margin: 0 16.2pt 0 0; text-align: right"><B>Other Comprehensive</B></P>
    <P STYLE="font: 7pt/66% Arial, Helvetica, Sans-Serif; margin: 0 14.2pt 0 0; text-align: right"><B>Income</B></P></TD>
    <TD STYLE="width: 10%; border-bottom: black 1pt solid; padding-right: 1.9pt; text-align: right; line-height: 65%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt"><B>Equity</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.25pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.01</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-left: 5.95pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Opening
    Balances</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 8.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">15,000,000</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 14.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">12,155,890</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 13.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 14.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">177,643</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">27,333,533</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.95pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.02</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-left: 5.95pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Previous
    Year Adjustments</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 8.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 11.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 13.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.95pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.03</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-left: 5.95pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Adjusted
    Opening Balances</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 8.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">15,000,000</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">12,155,890</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 13.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">177,643</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 1.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">27,333,533</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.9pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.04</FONT></TD>
    <TD STYLE="padding-top: 2.9pt; padding-left: 5.95pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Capital
    Transactions with Partners</FONT></TD>
    <TD STYLE="padding-top: 2.9pt; padding-right: 8.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.9pt; padding-right: 14.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.9pt; padding-right: 11.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.9pt; padding-right: 13.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.9pt; padding-right: 14.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.9pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.95pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.05</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-left: 5.95pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Total
    Comprehensive Income</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 8.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 11.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 13.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">747,212</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">747,212</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.95pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.05.01</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-left: 5.95pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Net
    Income for the Period</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 8.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 11.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 13.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">747,212</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">747,212</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.95pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.06</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-left: 5.95pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Internal
    Changes in Equity</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 8.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 11.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 13.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.95pt; padding-left: 2pt; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">5.07</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-left: 5.95pt; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">Closing
    Balances</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 8.8pt; text-align: right; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">15,000,000</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.85pt; text-align: right; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">0</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 11.75pt; text-align: right; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">12,155,890</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 13.85pt; text-align: right; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">747,212</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 14.2pt; text-align: right; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">177,643</FONT></TD>
    <TD STYLE="padding-top: 2.95pt; padding-right: 1.95pt; text-align: right; line-height: 58%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 7pt">28,080,745</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 12 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->10<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Parent Company&rsquo;s Financial Statements
/ Value Added Statement</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.3pt 0 0.05pt"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 9%; padding-right: 7.45pt; padding-left: 2pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 46%; padding-left: 7.75pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 24%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 8.3pt 0 0; text-align: right"><B>YTD Current</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 5.8pt 0 0; text-align: right"><B>Year</B></P></TD>
    <TD STYLE="width: 21%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 4.5pt 0 0; text-align: right"><B>YTD Previous</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 2.05pt 0 0; text-align: right"><B>Year</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 5.8pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2024
    to 03/31/2024</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 2.1pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2023
    to 03/31/2023</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.2pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.01</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Revenue</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6,809,835</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,949,048</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Goods,
    Products, and Services Sold</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,652,574</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">4,909,274</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Revenue</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">11,361</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">23,045</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Revenue
    from Construction of Own Assets</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,336,418</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,179,534</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Allowance
    for/Reversal of Doubtful Accounts</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-190,518</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-162,805</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Inputs
    Acquired from Third Parties</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-2,973,305</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-2,502,821</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Costs
    of Goods, Products and Services Sold</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-2,426,307</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-2,151,327</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Materials,
    Electricity, Outsourced Services, and Others</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-543,793</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-345,776</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-3,205</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-5,718</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Gross
    Value Added</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,836,530</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,446,227</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.04</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Retentions</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-772,552</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-657,145</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Depreciation,
    Amortization, and Depletion</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-772,552</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-657,145</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Net
    Value Added Produced</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,063,978</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,789,082</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Value
    Added Received in Transfer</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">270,425</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">236,241</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.06.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Equity
    results of investments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,837</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6,334</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.06.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Revenue</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">261,588</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">229,907</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.07</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Total
    Value Added to Distribute</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,334,403</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,025,323</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Distribution
    of Value Added</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,334,403</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,025,323</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Personnel</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">651,577</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">663,868</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Direct
    Compensation</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">444,109</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">453,047</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Benefits</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">147,012</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">172,881</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Government
    Severance Indemnity Fund for Employees (FGTS)</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">60,456</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">37,940</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Taxes,
    Fees, and Contributions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,115,677</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">959,120</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Federal</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,050,551</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">898,314</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">State</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">48,203</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">43,235</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.02.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Municipal</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">16,923</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">17,571</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Value
    Distributed to Providers of Capital</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">743,854</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">655,123</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.03.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Interest</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">740,160</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">646,449</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.03.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Rentals</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,694</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,674</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Value
    Distributed to Shareholders</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">747,212</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.04.03</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Retained
    Earnings/Accumulated Losses for the Period</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.8pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2.05pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">747,212</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 13 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->11<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Consolidated Financial Statements / Statement
of Financial Position - Assets</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.3pt 0 0.05pt"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; border-bottom: black 1pt solid; padding-right: 12.95pt; padding-left: 2pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 51%; border-bottom: black 1pt solid; padding-left: 2.25pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 21%; border-bottom: black 1pt solid"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 20.65pt 0 0; text-align: right"><B>Current Quarter</B></P>
    <P STYLE="font: 9pt/85% Arial, Helvetica, Sans-Serif; margin: 0 20.65pt 0 0; text-align: right"><B>03/31/2024</B></P></TD>
    <TD STYLE="width: 18%; border-bottom: black 1pt solid"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 1.85pt 0 0; text-align: right"><B>Previous Year</B></P>
    <P STYLE="font: 9pt/85% Arial, Helvetica, Sans-Serif; margin: 0 1.9pt 0 0; text-align: right"><B>12/31/2023</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.2pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Total
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">65,045,746</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">61,470,957</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Current
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">10,619,695</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,783,450</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Cash
    and Cash Equivalents</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,019,391</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">838,484</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Investments</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">4,172,591</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,426,752</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.02.01</FONT></TD>
    <TD STYLE="padding-top: 2pt; padding-left: 2.25pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Investments Assessed at Fair Value through Profit or Loss</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">4,172,591</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,426,752</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.02.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Investments Valued at Amortized Cost</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">4,172,591</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,426,752</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Accounts
    Receivable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,857,094</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,845,567</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.03.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Trade
    Receivables</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,590,432</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,584,287</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.03.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Receivables</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">266,662</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">261,280</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.03.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Related-Party
    Balances</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">266,662</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">261,280</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Inventories</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">122,166</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">86,008</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Recoverable
    Taxes</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">328,173</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">494,647</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.06.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Current
    Recoverable Taxes</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">328,173</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">494,647</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.06.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Current
    Recoverable Taxes</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">328,173</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">494,647</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.08</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Current Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">120,280</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">91,992</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.08.03</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">120,280</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">91,992</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.08.03.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Restricted
    Cash</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">45,694</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">54,944</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.01.08.03.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">74,586</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">37,048</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Noncurrent
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">54,426,051</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">53,687,507</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Long-Term
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">9,265,422</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,991,549</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Accounts
    Receivable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">345,801</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">272,436</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Trade
    Receivables</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">345,801</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">272,436</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.07</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Deferred
    Taxes</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">115,285</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">98,076</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.07.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Deferred
    Income Tax and Social Contribution</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">115,285</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">98,076</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.09</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Receivables
    from Related Parties</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">932,308</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">935,272</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.09.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Receivables
    from Controlling Shareholders</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">932,308</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">935,272</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.10</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Noncurrent Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,872,028</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,685,765</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.10.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Escrow
    Deposits</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">124,740</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">130,979</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.10.05</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Water
    and Basic Sanitation National Agency &ndash; ANA</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,879</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,673</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.10.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 4.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Contract
    Asset </FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,582,725</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,393,096</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.01.10.20</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 4.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">162,684</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">159,017</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Investments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">217,195</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">208,541</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Equity
    Interest</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">170,529</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">161,863</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.02.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Equity
    Interest in Jointly-Owned Subsidiaries</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">139,412</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">130,520</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.02.01.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Investments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">31,117</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">31,343</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Investment
    Properties</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">46,666</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">46,678</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Property,
    Plant and Equipment</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">484,312</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">474,559</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Intangible
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">44,459,122</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">44,012,858</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Intangible
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">44,459,122</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">44,012,858</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.04.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Concession
    Agreements</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,255,543</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,291,466</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.04.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Program
    Contracts</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">22,249,066</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">21,896,523</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.04.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Service
    Contracts</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">20,239,064</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">20,193,585</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.04.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Software
    License of Use</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">488,758</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">513,224</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.02.04.01.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Right
    of Use</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.65pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">226,691</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">118,060</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 14 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->12<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Consolidated Financial Statements / Statement
of Financial Position - Liabilities</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.3pt 0 0.05pt"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; padding-left: 2pt; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 50%; padding-left: 2.25pt; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 22%; padding-right: 20.6pt; text-align: right; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Current
    Quarter</B></FONT></TD>
    <TD STYLE="width: 18%; padding-right: 1.8pt; text-align: right; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Previous
    Year</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-left: 2pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Conta</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 20.6pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>03/31/2024</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 1.85pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>12/31/2023</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.2pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Total
    Liabilities</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">65,045,746</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">61,470,957</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Current
    Liabilities</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,657,501</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,407,842</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Social
    and Labor Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">742,587</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">807,440</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Social
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">34,469</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">65,413</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Labor
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">708,118</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">742,027</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Suppliers</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">490,494</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">456,215</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Domestic
    Suppliers</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">490,494</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">456,215</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Tax
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">619,028</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">511,972</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.03.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Federal
    Tax Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">613,630</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">499,844</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.03.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Income
    Tax and Social Contribution Payable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">389,712</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">205,964</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.03.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Pis-Pasep
    and Cofins Payable</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">137,048</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">141,703</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.03.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">INSS
    (Social Security Contribution) Payable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">42,142</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">44,556</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.03.01.20</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Federal Taxes</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">44,728</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">107,621</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.03.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Municipal
    Tax Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,398</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">12,128</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Borrowings
    and Financing</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,716,361</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,616,406</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Borrowings
    and Financing</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,294,586</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,291,129</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.04.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">In
    Local Currency</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,048,287</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,041,428</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.04.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">In Foreign
    Currency</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">246,299</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">249,701</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.04.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Debentures</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,215,311</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,206,894</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.04.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financing
    through Lease</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">206,464</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">118,383</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,003,055</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,951,442</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Payables
    to Related Parties</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,139</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,354</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Payables
    to Controlling Shareholders</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,139</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,354</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,999,916</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,950,088</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Dividends
    and Interest on Capital Payable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">837,391</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">837,391</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Services
    Payable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">838,703</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">750,732</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Refundable
    Amounts</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">28,312</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">28,522</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Program
    Contract Commitments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">20,896</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">21,969</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02.07</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Public-Private
    Partnership - PPP</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">435,671</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">487,926</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02.09</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 4.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Indemnities</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">11,170</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,750</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.05.02.20</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 4.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">827,773</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">814,798</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,085,976</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,064,367</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Tax,
    Social Security, Labor, and Civil Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">708,296</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">685,822</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Tax
    Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">37,712</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">36,793</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Pension
    Plan and Labor Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">538,889</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">540,427</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Civil
    Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">131,695</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">108,602</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">377,680</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">378,545</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.02.03</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions
    for Environmental Liabilities and Decommissioning</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">22,718</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">20,561</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions
    for Customers</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">158,667</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">160,883</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.01.06.02.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions
    for Suppliers</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">196,295</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">197,101</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Noncurrent
    Liabilities</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">25,707,574</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">23,205,739</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Borrowings
    and Financing</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">19,307,946</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">16,919,944</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Borrowings
    and Financing</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">10,138,795</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">10,448,915</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.01.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">In Local
    Currency</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,754,002</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,952,725</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.01.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">In
    Foreign Currency</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,384,793</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,496,190</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 15 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->13<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Consolidated Financial Statements / Statement
of Financial Position - Liabilities</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.3pt 0 0.05pt"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; padding-left: 2pt; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 50%; padding-left: 2.25pt; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 22%; padding-right: 20.6pt; text-align: right; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Current
    Quarter</B></FONT></TD>
    <TD STYLE="width: 18%; padding-right: 1.8pt; text-align: right; "><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Previous
    Year</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-left: 2pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Conta</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 20.6pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>03/31/2024</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 1.85pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>12/31/2023</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.2pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Debentures</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,811,528</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6,137,902</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financing
    through Lease</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">357,623</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">333,127</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,622,403</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,523,730</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,622,403</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,523,730</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Pension
    Plan Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,131,230</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,142,871</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Program
    Contract Commitments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">12,139</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">12,047</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Public-Private
    Partnership - PPP</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,787,032</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,798,688</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02.07</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Indemnities</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">35,885</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">14,460</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02.08</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Labor
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">58,636</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">67,755</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02.09</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Deferred
    Cofins/Pasep</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">169,265</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">164,097</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.02.02.20</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">428,216</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">323,812</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">777,225</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">762,065</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Tax,
    Social Security, Labor, and Civil Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">236,379</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">235,430</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Tax
    Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">57,926</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">46,754</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Pension
    Plan and Labor Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">171,002</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">170,471</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Civil
    Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7,451</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">18,205</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">540,846</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">526,635</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.02.03</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions
    for Environmental Liabilities and Decommissioning</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">488,006</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">472,124</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions
    for Customers</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">4,388</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,312</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.02.04.02.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions
    for Suppliers</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">48,452</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">46,199</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Consolidated
    Equity</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">30,680,671</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">29,857,376</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Paid-Up
    Capital</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">15,000,000</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">15,000,000</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Profit
    Reserves</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">14,711,014</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">14,711,014</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Legal
    Reserve</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,864,604</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,864,604</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03.04.08</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Additional
    Dividend Proposed</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">93,047</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">93,047</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03.04.10</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Reserve
    for Investments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">12,753,363</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">12,753,363</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Retained
    Earnings/Accumulated Losses</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.03.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 2.25pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Equity
    Valuation Adjustments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 20.6pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">146,362</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 1.8pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">146,362</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 16 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->14<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Consolidated Financial Statements / Income Statement</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.3pt 0 0.05pt"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 9%; padding-right: 7.45pt; padding-left: 2pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 48%; padding-left: 7.75pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 22%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 8.25pt 0 0; text-align: right"><B>YTD Current</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 5.75pt 0 0; text-align: right"><B>Year</B></P></TD>
    <TD STYLE="width: 21%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 4.4pt 0 0; text-align: right"><B>YTD Previous</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 1.95pt 0 0; text-align: right"><B>Year</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 5.75pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2024
    to 03/31/2024</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 2pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2023
    to 03/31/2023</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.2pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.01</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Revenue
    from Sales and/or Services</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6,560,246</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Cost
    of Sales and/or Services</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-3,975,427</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Cost
    of Sales and/or Services</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-2,668,704</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Construction
    Costs</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-1,306,723</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Gross
    Profit</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,584,819</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Operating
    Expenses/Income</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-922,764</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Selling
    Expenses</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-400,605</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Selling
    Expenses</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-210,087</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Allowance
    for Doubtful Accounts</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-190,518</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">General
    and Administrative Expenses</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-538,138</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.04</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Operating Income</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">10,291</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Operating Income</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">11,361</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.04.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Cofins
    and Pasep</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-1,070</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Operating Expenses</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-3,205</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.04.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Equity
    results of investments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,893</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Income
    before Financial Result and Taxes</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,662,055</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Result</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-338,195</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Revenue</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">247,576</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Revenue</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">259,190</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Exchange
    Variation Gains</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Cofins
    and Pasep</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-11,615</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Expenses</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-585,771</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Expenses</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-592,103</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.06.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Exchange
    Variation Losses</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6,332</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.07</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Profit
    before Taxes on Income</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,323,860</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.08</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Income
    Tax and Social Contribution</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-500,565</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.08.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Current</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-517,774</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.08.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Deferred</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">17,209</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.09</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Net
    Income from Continuing Operations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,11</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Consolidated
    Profit/Loss for the Period</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.99</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Earnings
    per Share - (Reais/Share)</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.99.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Basic
    Earnings per Share</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.99.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Common
    </FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.20451</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.99.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Diluted
    Earnings per Share</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3.99.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Common
    </FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.20451</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 17 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->15<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Consolidated Financial Statements / Statement
of Comprehensive Income</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 4.3pt 1.7pt 0 7.35pt"><B></B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top; text-align: left">
  <TD STYLE="width: 9%"><P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 4.3pt 1.7pt 0 7.35pt"><B>Code</B></P></TD>
  <TD STYLE="width: 48%"><P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 4.3pt 1.7pt 0 7.35pt"><B>Description</B></P></TD>
  <TD STYLE="width: 22%"><P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 4.3pt 1.7pt 0 7.35pt"><B>YTD Current<BR>
01/01/2024 to 03/31/2024</B></P></TD>
  <TD STYLE="width: 21%"><P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 4.3pt 1.7pt 0 7.35pt"><B>YTD Previous Year<BR>
01/01/2023 to 03/31/2023</B></P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 1.2pt 0 0 7.35pt">4.01&#9;</P></TD>
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 1.2pt 0 0 7.35pt">Consolidated Net Income for the Period&#9;</P></TD>
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 1.2pt 0 0 7.35pt">823,295&#9;</P></TD>
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 1.2pt 0 0 7.35pt">0</P></TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 1.2pt 0 0 7.35pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">4.03</FONT></P></TD>
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 1.2pt 0 0 7.35pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Consolidated Comprehensive Income for the Period&#9;</FONT></P></TD>
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 1.2pt 0 0 7.35pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">823.295&#9;</FONT></P></TD>
  <TD><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 1.2pt 0 0 7.35pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></P></TD></TR>
</TABLE>

<P STYLE="font: 1pt Arial, Helvetica, Sans-Serif; margin: 0.35pt 0 0"><B>&nbsp;</B></P>

<P STYLE="font: 11pt/8% Georgia, Times, Serif; margin: 0 0 0 4.8pt">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="margin: 0"></P>

<!-- Field: Page; Sequence: 18 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->16<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Consolidated Financial Statements / Statement
of Cash Flows &ndash; Indirect Method</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.3pt 0 0.05pt"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 9%; padding-right: 7.45pt; padding-left: 2pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 49%; padding-left: 7.75pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 21%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 8.25pt 0 0; text-align: right"><B>YTD Current</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 5.75pt 0 0; text-align: right"><B>Year</B></P></TD>
    <TD STYLE="width: 21%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 4.4pt 0 0; text-align: right"><B>YTD Previous</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 1.95pt 0 0; text-align: right"><B>Year</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 5.75pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2024
    to 03/31/2024</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 2pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2023
    to 03/31/2023</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.2pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Net
    Cash from Operating Activities</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,397,420</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Cash
    from Operations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,828,023</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Profit
    before Income Tax and Social Contribution</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,323,860</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provision
    and Inflation Adjustments on Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">83,945</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Finance
    Charges from Customers</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-109,237</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.05</FONT></TD>
    <TD STYLE="padding-top: 2pt; padding-right: 11pt; padding-left: 7.75pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Residual
    Value of Property, Plant and Equipment, Intangible Assets, and Investment Properties Written-off</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">918</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.06</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Depreciation
    and Amortization</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">773,785</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.07</FONT></TD>
    <TD STYLE="padding-top: 2pt; padding-right: 11pt; padding-left: 7.75pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Interest
    on Borrowings and Financing Payable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">344,775</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.65pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.08</FONT></TD>
    <TD STYLE="padding-top: 1.9pt; padding-left: 7.75pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Inflation
    Adjustment and Exchange Gains (Losses) on Borrowings and Financing</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">47,701</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.09</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Interest
    and Inflation Adjustments on Liabilities</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,271</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.10</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Interest
    and Inflation Adjustments on Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-60,490</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.11</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Allowance
    for Doubtful Accounts</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">190,518</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.12</FONT></TD>
    <TD STYLE="padding-top: 2pt; padding-left: 7.75pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provision
    for Consent Decree (TAC) and Knowledge Retention Program (PRC)</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-107,796</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.13</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Equity
    results of investments</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-8,893</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.14</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Interest
    and Inflation Adjustment - PPP</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">145,823</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.15</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Adjustments</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">4,346</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.16</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Transfer
    to the S&atilde;o Paulo Municipal Government</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">174,673</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.17</FONT></TD>
    <TD STYLE="padding-top: 2pt; padding-right: 3.5pt; padding-left: 10.25pt; line-height: 96%; text-indent: -2.5pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Construction
    Margin on Intangible Assets Arising from Concession Agreements</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-30,055</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.01.18</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Pension
    Plan Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">48,879</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Changes
    in Assets and Liabilities</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-631,604</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Trade
    Receivables</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-154,632</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Related-Party
    Balances and Transactions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6,553</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Inventories</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-36,158</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Taxes
    Recoverable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">166,474</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-41,024</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Escrow
    Deposits</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">12,497</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.08</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Trade
    Payables and Contractors</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-419,392</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.09</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Social
    and Labor Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">33,630</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.10</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Pension
    Plan Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-60,520</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.11</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Taxes
    and Contributions Payable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-85,314</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.12</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Services
    Payable</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-86,703</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.13</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Obligations</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">74,993</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.14</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Provisions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-47,176</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.02.15</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Deferred
    Cofins/Pasep</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,168</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-798,999</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.03.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Interest
    Paid</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-473,596</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.01.03.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Income
    Tax and Social Contribution Paid</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-325,403</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Net
    Cash from Investing Activities</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-2,284,809</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Acquisition
    of Contract Asset and Intangible Assets</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-571,410</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Acquisition
    of Property, Plant and Equipment</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-15,911</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Restricted
    Cash</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">9,250</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 19 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->17<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Consolidated Financial Statements / Statement
of Cash Flows &ndash; Indirect Method</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.3pt 0 0.05pt"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 9%; padding-right: 7.45pt; padding-left: 2pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 43%; padding-left: 7.75pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 27%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 8.3pt 0 0; text-align: right"><B>YTD Current</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 5.8pt 0 0; text-align: right"><B>Year</B></P></TD>
    <TD STYLE="width: 21%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 4.45pt 0 0; text-align: right"><B>YTD Previous</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 2pt 0 0; text-align: right"><B>Year</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 5.8pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2024
    to 03/31/2024</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 2.05pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2023
    to 03/31/2023</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.2pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.02.07</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Investments</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-1,706,738</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Net
    Cash from Financing Activities</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,068,296</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.03.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Funding</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,939,695</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.03.02</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Amortization</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-660,026</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.03.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Public-Private
    Partnership - PPP</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-209,734</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.03.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Program
    Contract Commitments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-1,639</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Increase
    (Decrease) in Cash and Cash Equivalents</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,180,907</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.05.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Opening
    Balance of Cash and Cash Equivalents</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">838,484</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.05.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Closing
    Balance of Cash and Cash Equivalents</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2,019,391</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.05pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 20 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->18<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Consolidated Financial Statements / Statement
of Changes in Equity - 01/01/2024 to 03/31/2024</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.3pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 4%; border-bottom: black 1pt solid; padding-right: 4.6pt; padding-left: 2pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 22%; border-bottom: black 1pt solid; padding-left: 5.15pt; line-height: 55%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 8%; border-bottom: black 1pt solid; padding-left: 25.35pt; line-height: 96%; text-indent: -4.05pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt"><B>Paid-up
    Capital</B></FONT></TD>
    <TD STYLE="width: 10%; border-bottom: black 1pt solid; padding-right: 12.65pt; padding-left: 7.7pt; text-align: justify; line-height: 96%; text-indent: 0.05in"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt"><B>Capital
    Reserves, Options Granted, and Treasury Shares</B></FONT></TD>
    <TD STYLE="width: 9%; border-bottom: black 1pt solid; padding-right: 9.95pt; text-align: right; line-height: 55%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt"><B>Profit
    Reserves</B></FONT></TD>
    <TD STYLE="width: 10%; border-bottom: black 1pt solid"><P STYLE="font: 6pt/55% Arial, Helvetica, Sans-Serif; margin: 0 13.45pt 0 0; text-align: right"><B>Retained Earnings/Accumulated</B></P>
    <P STYLE="font: 6pt/56% Arial, Helvetica, Sans-Serif; margin: 0 11.75pt 0 0; text-align: right"><B>Losses</B></P></TD>
    <TD STYLE="width: 10%; border-bottom: black 1pt solid"><P STYLE="font: 6pt/55% Arial, Helvetica, Sans-Serif; margin: 0 13.8pt 0 0; text-align: right"><B>Other Comprehensive</B></P>
    <P STYLE="font: 6pt/56% Arial, Helvetica, Sans-Serif; margin: 0 12.1pt 0 0; text-align: right"><B>Income</B></P></TD>
    <TD STYLE="width: 9%; border-bottom: black 1pt solid; padding-right: 8pt; text-align: right; line-height: 55%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt"><B>Equity</B></FONT></TD>
    <TD STYLE="width: 10%; border-bottom: black 1pt solid"><P STYLE="font: 6pt/55% Arial, Helvetica, Sans-Serif; margin: 0 12.85pt 0 0; text-align: right"><B>Non-Controlling</B></P>
    <P STYLE="font: 6pt/56% Arial, Helvetica, Sans-Serif; margin: 0 11.1pt 0 0; text-align: right"><B>Interests</B></P></TD>
    <TD STYLE="width: 8%; border-bottom: black 1pt solid"><P STYLE="font: 6pt/55% Arial, Helvetica, Sans-Serif; margin: 0 3.2pt 0 0; text-align: right"><B>Equity</B></P>
    <P STYLE="font: 6pt/56% Arial, Helvetica, Sans-Serif; margin: 0 1.6pt 0 0; text-align: right"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.25pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.01</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-left: 5.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Opening
    Balances</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 7.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">15,000,000</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 12.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 9.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">14,711,014</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 12.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">146,362</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">29,857,376</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 11.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 1.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">29,857,376</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 3.55pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.02</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-left: 5.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Previous
    Year Adjustments</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 9.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 1.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 3.55pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.03</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-left: 5.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Adjusted
    Opening Balances</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">15,000,000</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 9.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">14,711,014</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">146,362</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">29,857,376</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 1.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">29,857,376</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 3.5pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.04</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-left: 5.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Capital
    Transactions with Partners</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 7.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 12.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 9.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 12.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 7.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 11.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 1.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 3.55pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.05</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-left: 5.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Total
    Comprehensive Income</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 9.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 1.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">823,295</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 3.55pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.05.01</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-left: 5.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Net
    Income for the Period</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 9.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 1.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">823,295</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 3.55pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.06</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-left: 5.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Internal
    Changes in Equity</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 9.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 1.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 3.55pt; padding-left: 2pt; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.07</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-left: 5.15pt; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Closing
    Balances</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.5pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">15,000,000</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.65pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 9.95pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">14,711,014</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.75pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.1pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">146,362</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 8pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">30,680,671</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.1pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 1.55pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">30,680,671</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 21 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->19<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Consolidated Financial Statements / Statement
of Changes in Equity - 01/01/2023 to 03/31/2023</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 4.05pt 0 0 7.35pt"><B>Justification: There were no consolidated data in the
period.</B></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 2.35pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 4%; border-bottom: black 1pt solid; padding-right: 4.6pt; padding-left: 2pt; line-height: 96%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 22%; border-bottom: black 1pt solid; padding-left: 5.15pt; line-height: 55%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 8%; border-bottom: black 1pt solid; padding-left: 25.35pt; line-height: 96%; text-indent: -4.05pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt"><B>Paid-up
    Capital</B></FONT></TD>
    <TD STYLE="width: 10%; border-bottom: black 1pt solid; padding-right: 12.65pt; padding-left: 7.7pt; text-align: justify; line-height: 96%; text-indent: 0.05in"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt"><B>Capital
    Reserves, Options Granted, and Treasury Shares</B></FONT></TD>
    <TD STYLE="width: 9%; border-bottom: black 1pt solid; padding-right: 9.95pt; text-align: right; line-height: 55%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt"><B>Profit
    Reserves</B></FONT></TD>
    <TD STYLE="width: 10%; border-bottom: black 1pt solid"><P STYLE="font: 6pt/55% Arial, Helvetica, Sans-Serif; margin: 0 13.45pt 0 0; text-align: right"><B>Retained Earnings/Accumulated</B></P>
    <P STYLE="font: 6pt/56% Arial, Helvetica, Sans-Serif; margin: 0 11.75pt 0 0; text-align: right"><B>Losses</B></P></TD>
    <TD STYLE="width: 10%; border-bottom: black 1pt solid"><P STYLE="font: 6pt/55% Arial, Helvetica, Sans-Serif; margin: 0 13.8pt 0 0; text-align: right"><B>Other Comprehensive</B></P>
    <P STYLE="font: 6pt/56% Arial, Helvetica, Sans-Serif; margin: 0 12.1pt 0 0; text-align: right"><B>Income</B></P></TD>
    <TD STYLE="width: 9%; border-bottom: black 1pt solid; padding-right: 8pt; text-align: right; line-height: 55%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt"><B>Equity</B></FONT></TD>
    <TD STYLE="width: 10%; border-bottom: black 1pt solid"><P STYLE="font: 6pt/55% Arial, Helvetica, Sans-Serif; margin: 0 12.85pt 0 0; text-align: right"><B>Non-Controlling</B></P>
    <P STYLE="font: 6pt/56% Arial, Helvetica, Sans-Serif; margin: 0 11.1pt 0 0; text-align: right"><B>Interests</B></P></TD>
    <TD STYLE="width: 8%; border-bottom: black 1pt solid"><P STYLE="font: 6pt/55% Arial, Helvetica, Sans-Serif; margin: 0 3.2pt 0 0; text-align: right"><B>Equity</B></P>
    <P STYLE="font: 6pt/56% Arial, Helvetica, Sans-Serif; margin: 0 1.6pt 0 0; text-align: right"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.25pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.01</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-left: 5.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Opening
    Balances</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 7.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 12.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 9.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 12.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 7.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 11.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 1.25pt; padding-right: 1.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 3.55pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.02</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-left: 5.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Previous
    Year Adjustments</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 9.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 1.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 3.55pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.03</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-left: 5.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Adjusted
    Opening Balances</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 9.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 1.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 3.55pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.04</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-left: 5.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Capital
    Transactions with Partners</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 9.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 1.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 3.5pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.05</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-left: 5.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Total
    Comprehensive Income</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 7.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 12.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 9.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 12.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 7.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 11.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.5pt; padding-right: 1.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 3.55pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.06</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-left: 5.15pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Internal
    Changes in Equity</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 9.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 1.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 3.55pt; padding-left: 2pt; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">5.07</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-left: 5.15pt; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">Closing
    Balances</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.5pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.65pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 9.9pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.75pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 12.1pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 7.95pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 11.1pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD>
    <TD STYLE="padding-top: 3.55pt; padding-right: 1.55pt; text-align: right; line-height: 49%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 6pt">0</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 22 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->20<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 3.8pt 0 0"><B>&nbsp;</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>Consolidated Financial Statements / Value Added
Statement</B></P>

<P STYLE="font: 12pt/193% Arial, Helvetica, Sans-Serif; margin-top: 4.1pt; margin-bottom: 0pt; margin-left: 7.35pt"><B>(R$ thousand)</B></P>

<P STYLE="font: 3.5pt Arial, Helvetica, Sans-Serif; margin: 0.35pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 9%; padding-right: 7.45pt; padding-left: 2pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Code</B></FONT></TD>
    <TD STYLE="width: 46%; padding-left: 7.75pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Description</B></FONT></TD>
    <TD STYLE="width: 24%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 8.3pt 0 0; text-align: right"><B>YTD Current</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 5.8pt 0 0; text-align: right"><B>Year</B></P></TD>
    <TD STYLE="width: 21%"><P STYLE="font: 9pt/82% Arial, Helvetica, Sans-Serif; margin: 0 4.5pt 0 0; text-align: right"><B>YTD Previous</B></P>
    <P STYLE="font: 9pt/76% Arial, Helvetica, Sans-Serif; margin: 0 2.05pt 0 0; text-align: right"><B>Year</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 5.8pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2024
    to 03/31/2024</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-right: 2.1pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>01/01/2023
    to 03/31/2023</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.2pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.01</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Revenue</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6,818,720</FONT></TD>
    <TD STYLE="padding-top: 1.2pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Goods,
    Products, and Services Sold</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5,661,099</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    Revenue</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">11,361</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Revenue
    from Construction of Own Assets</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,336,778</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.01.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Allowance
    for/Reversal of Doubtful Accounts</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-190,518</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Inputs
    Acquired from Third Parties</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-2,976,790</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Costs
    of Goods, Products and Services Sold</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-2,429,070</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Materials,
    Electricity, Outsourced Services, and Others</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-544,515</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.02.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-3,205</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Gross
    Value Added</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,841,930</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.04</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Retentions</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-773,785</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.04.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Depreciation,
    Amortization, and Depletion</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">-773,785</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.05</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Net
    Value Added Produced</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,068,145</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.06</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Value
    Added Received in Transfer</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">268,084</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.06.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Equity
    results of investments</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,893</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.06.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    Revenue</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">259,191</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.07</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Total
    Value Added to Distribute</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,336,229</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Distribution
    of Value Added</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,336,229</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Personnel</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">652,053</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.01.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Direct
    Compensation</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">444,585</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.01.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Benefits</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">147,012</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.01.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Government
    Severance Indemnity Fund for Employees (FGTS)</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">60,456</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Taxes,
    Fees, and Contributions</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,117,022</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.02.01</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Federal</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,051,853</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.02.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">State</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">48,230</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.02.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Municipal</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">16,939</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.03</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Value
    Distributed to Providers of Capital</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">743,859</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.03.01</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Interest</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">740,165</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.03.02</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Rentals</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">3,694</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.75pt; padding-left: 2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.04</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-left: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Value
    Distributed to Shareholders</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 5.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 1.75pt; padding-right: 2.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.7pt; padding-left: 2pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">7.08.04.03</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-left: 7.75pt; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Retained
    Earnings/Accumulated Losses for the Period</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 5.8pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">823,295</FONT></TD>
    <TD STYLE="padding-top: 1.7pt; padding-right: 2.1pt; text-align: right; line-height: 77%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 23; Options: NewSection; Value: 21 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->21<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B>Comments on the Company&rsquo;s Performance</B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: bold 14pt Arial, Helvetica, Sans-Serif; margin: 6.25pt 0 0 55.7pt; text-indent: 0in; color: navy">Highlights</P>

<P STYLE="font: 14pt Arial, Helvetica, Sans-Serif; margin: 0.4pt 0 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 0 41.15pt 0 55.65pt; text-align: justify">Adjusted EBITDA totaled R$
2,428.8 million in 1Q24, up by R$ 393.8 million (+19.4%) over the R$ 2,035.0 million reported in 1Q23. Consequently, the adjusted EBITDA
margin reached 37.0% compared to 35.7% in 1Q23, and the adjusted EBITDA margin (excluding construction revenue) reached 46.5% compared
to the 45.0% reported in 1Q23.</P>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 6.15pt 41.25pt 0 55.65pt; text-align: justify">Excluding the effects
of the agreement with AAPS (detailed below), adjusted EBITDA was R$ 2,591.2 million in 1Q24, with an adjusted EBITDA margin of 39.5%.</P>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 6.1pt 41.3pt 0 55.65pt; text-align: justify">Net income came to R$ 823.3
million in 1Q24, up by R$ 76.1 million (+10.2%) over the R$ 747.2 million recorded in 1Q23.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 6.05pt 0 0 55.65pt">Excluding the agreement with AAPS, net income totaled
R$ 985.7 million in 1Q24.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 2.1pt 0 0">&nbsp;</P>

<P STYLE="font: 9.5pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 55.7pt"><B>Revenue from sanitation services</B></P>

<P STYLE="font: 9.5pt Arial, Helvetica, Sans-Serif; margin: 1.55pt 0 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.05pt 0 0 55.7pt">Increase of R$ 751.8 million (+15.3%), impacted by (i)
a 9.6% tariff adjustment implemented since May 2023; and</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.5pt 0 0 55.65pt">(ii) a 5.3% increase in total billed volume.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 1.05pt 0 0.05pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #95B3D7">
    <TD STYLE="border: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 5.65pt; padding-left: 30.9pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Var.</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #95B3D7">
    <TD STYLE="width: 60%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="width: 11%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 5.65pt; padding-left: 19.95pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1Q24</B></FONT></TD>
    <TD STYLE="width: 11%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 5.65pt; padding-left: 19.95pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1Q23</B></FONT></TD>
    <TD STYLE="width: 11%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 5.65pt; padding-left: 0.6pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>R$</B></FONT></TD>
    <TD STYLE="width: 7%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 5.65pt; padding-left: 0.55pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>%</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 5.65pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Revenue
    from sanitation services</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 5.65pt; padding-right: 2.95pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">5,661.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 5.65pt; padding-right: 2.95pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">4,909.3</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 5.65pt; padding-right: 2.9pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">751.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 5.65pt; padding-right: 2.8pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">15.3</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 5.65pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Billed
    volume (million m&sup3;)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 5.65pt; padding-right: 2.95pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1,085.6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 5.65pt; padding-right: 2.95pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1,030.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 5.65pt; padding-right: 2.85pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">55.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 5.65pt; padding-right: 2.8pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">5.3</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 5.65pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Average
    tariff</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 5.65pt; padding-right: 2.85pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">5.2</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 5.65pt; padding-right: 2.85pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">4.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 5.65pt; padding-right: 2.9pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">0.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 5.65pt; padding-right: 2.8pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">9.5</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 9.5pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 9.5pt Arial, Helvetica, Sans-Serif; margin: 3.25pt 0 0">&nbsp;</P>

<P STYLE="font: 9.5pt Arial, Helvetica, Sans-Serif; margin: 0.05pt 0 0 55.7pt; text-align: justify"><B>Impacts from the exchange variation</B></P>

<P STYLE="font: 9.5pt Arial, Helvetica, Sans-Serif; margin: 1.55pt 0 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 0 41.15pt 0 55.65pt; text-align: justify">In 1Q24, the positive exchange
variation was smaller than that reported in 1Q23, due to the appreciation of the U.S. dollar in the current period compared to a depreciation
of the U.S. dollar and Yen in the previous period, as shown below:</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 70%; border-bottom: black 1pt solid; border-right: black 1pt solid">&nbsp;</TD>
    <TD STYLE="width: 16%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; background-color: #95B3D7; padding-top: 3.1pt; padding-left: 0.2pt; text-align: center; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1Q24</B></FONT></TD>
    <TD STYLE="width: 14%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; background-color: #95B3D7; padding-top: 3.1pt; padding-left: 0.1pt; text-align: center; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1Q23</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.1pt; padding-left: 3.45pt; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Foreign
    currency debt - R$ million</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.1pt; padding-right: 3.05pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">2,631.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.1pt; padding-right: 3.05pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">2,634.0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.1pt; padding-left: 3.45pt; line-height: 71%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Foreign
    currency debt as a percentage of total debt</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.1pt; padding-right: 3.05pt; text-align: right; line-height: 71%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">12.0%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.1pt; padding-right: 3.05pt; text-align: right; line-height: 71%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">14.0%</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.2pt; padding-left: 3.45pt; line-height: 71%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">U.S.
    dollar variation in the quarter</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 3.1pt; text-align: right; line-height: 71%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">3.2%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 3.1pt; text-align: right; line-height: 71%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(2.6%)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.2pt; padding-left: 3.45pt; line-height: 71%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Yen
    variation in the quarter</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 3.05pt; text-align: right; line-height: 71%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(3.5%)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 3.05pt; text-align: right; line-height: 71%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(3.3%)</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0">&nbsp;</P>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 0.05pt 19.9pt 0 55.7pt; text-align: justify">In April 2024, the Company
executed derivative financial agreements with the financial institutions defined in the Financial Risk Policy to reduce the exposure
of the total balance in foreign currency of existing debts, totaling US$ 531 million, against fluctuations in the foreign exchange market
and mitigate the impacts of these fluctuations on the Company&rsquo;s economic and financial results. The agreements are valid until
December 2024.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 7.25pt 0 0">&nbsp;</P>

<P STYLE="font: 9.5pt Arial, Helvetica, Sans-Serif; margin: 0.05pt 0 0 55.7pt; text-align: justify"><B>Agreement with AAPS</B></P>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 6.45pt 20pt 0 55.7pt; text-align: justify">An agreement between SABESP
and AAPS (Sabesp&rsquo;s Association of Retirees and Pensioners) regarding financial compensation for the migration of retirees, former
employees, pensioners, and dependents between health plans was approved in January 2024 to address the current and future deficits related
to beneficiaries who joined the migration, in addition to the withdrawal by AAPS of the lawsuit seeking the merger of active and inactive
asset masses into a single plan, which could have led to post-employment liabilities with an expected potential loss of R$303.9 million
on December 31, 2022.</P>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 6.25pt 20pt 0 55.7pt; text-align: justify">The impact of the agreement
generated a non-current expense of R$ 162.4 million, recorded under general expenses in 1Q24. The payments will be made in 60 monthly
installments starting in March 2024.</P>


<!-- Field: Page; Sequence: 24 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->22<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B>Comments on the Company&rsquo;s Performance</B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 14pt Arial, Helvetica, Sans-Serif; margin-top: 6.15pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 37.7pt"></TD><TD STYLE="width: 17.9pt"><FONT STYLE="color: #00009A">1.</FONT></TD><TD><FONT STYLE="color: navy">Result
                                            for the period (Consolidated)</FONT></TD></TR></TABLE>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 8.1pt 0 0"><B>&nbsp;</B></P>

<P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 37.65pt"><B><I>R$ million</I></B></P>

<P STYLE="font: 8pt/115% Arial, Helvetica, Sans-Serif; margin: 0"><B><I>&nbsp;</I></B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD STYLE="border: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-left: 0.95pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Var.</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD STYLE="width: 57%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="width: 12%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 4.15pt; padding-left: 0.8pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1Q24</B></FONT></TD>
    <TD STYLE="width: 12%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 4.15pt; padding-left: 0.8pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1Q23</B></FONT></TD>
    <TD STYLE="width: 10%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 4.15pt; padding-left: 0.95pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>R$</B></FONT></TD>
    <TD STYLE="width: 9%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 4.15pt; padding-left: 0.8pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>%</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.45pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Revenue
    from sanitation services</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">5,661.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">4,909.3</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">751.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">15.3</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.45pt; padding-left: 14.6pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">COFINS
    and PASEP/TRCF taxes</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(437.7)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(390.4)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(47.3)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">12.1</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.15pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>(=)
    Revenue from sanitation services, net</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>5,223.4</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>4,518.9</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>704.5</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>15.6</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.45pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Construction
    revenue</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1,336.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1,179.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">157.3</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">13.3</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.45pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>(=)
    Net operating income</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>6,560.2</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>5,698.4</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>861.8</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>15.1</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.45pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Construction
    costs</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(1,306.7)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(1,153.0)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(153.7)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">13.3</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.4pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Costs
    and expenses</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(3,607.4)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(3,173.8)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(433.6)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">13.7</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.4pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Other
    operating income (expenses), net</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">7.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">14.6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(7.5)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(51.4)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.4pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Equity
    results of investments</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">8.9</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">6.3</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">2.6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">41.3</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.45pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>(=)
    Earnings before financial result, income tax, and social contribution</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1,662.1</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1,392.5</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>269.6</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>19.4</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.45pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Financial
    result</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.5pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(338.2)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(259.5)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(78.7)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">30.3</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.45pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>(=)
    Earnings before income tax and social contribution</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1,323.9</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1,133.0</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>190.9</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>16.8</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.15pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Income
    tax and social contribution</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.5pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(500.6)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(385.8)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(114.8)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">29.8</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.2pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>(=)
    Net income</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>823.3</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>747.2</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>76.1</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>10.2</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.15pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Earnings
    per share (R$)*</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1.20</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1.09</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 11pt Arial, Helvetica, Sans-Serif; margin: 2.1pt 0 0 58.2pt"><FONT STYLE="font-size: 9pt"><I>*</I></FONT><I> <FONT STYLE="font-size: 7pt">Number
of shares = 683,509,869</FONT></I></P>

<P STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin: 4.35pt 0 0"><I>&nbsp;</I></P>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 0.05pt 12.95pt 0 13.15pt; text-align: justify">The net operating income,
which includes construction revenue, totaled R$ 6,560.2 million in 1Q24, an increase of 15.1% over 1Q23.</P>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 6.05pt 12.8pt 0 13.15pt; text-align: justify">Excluding construction
costs and the provision for the agreement with AAPS, costs and expenses totaled R$ 3,445.0 million, an increase of R$ 271.2 million (+8.5%).
Considering the agreement, costs and expenses totaled R$ 3,607.4 million (+13.7%).</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 6.15pt 0 0 13.15pt; text-align: justify">The Company recorded a net income
of R$ 823.3 million in 1Q24, compared to R$ 747.2 million in 1Q23.</P>

<P STYLE="font: bold 10pt Arial, Helvetica, Sans-Serif; margin: 6.05pt 0 0 34.45pt; color: navy">Adjusted EBITDA Reconciliation (Non-accounting
measures)</P>

<P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 4.25pt 6.45pt 0.1pt 0; text-align: right"><B><I>R$ million</I></B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD STYLE="border: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-left: 0.5pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Var.</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD STYLE="width: 58%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="width: 11%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 4.15pt; padding-left: 0.65pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1Q24</B></FONT></TD>
    <TD STYLE="width: 12%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 4.15pt; padding-left: 0.7pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1Q23</B></FONT></TD>
    <TD STYLE="width: 11%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 4.15pt; padding-left: 0.7pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>R$</B></FONT></TD>
    <TD STYLE="width: 8%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 4.15pt; padding-left: 0.65pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>%</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.2pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Net
    income</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.5pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">823.3</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.55pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">747.2</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.55pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">76.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.55pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">10.2</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.15pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(+)
    Agreement with AAPS</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.5pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">162.4</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.6pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">162.4</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.55pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.15pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>(=)
    Adjusted Net Income</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.5pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>985.7</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.55pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>747.2</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.6pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>238.5</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.55pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>31.9</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.2pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Income
    tax and social contribution</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.6pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">500.6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.6pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">385.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.65pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">114.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.55pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">29.8</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.15pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Financial
    result</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.5pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">338.2</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.55pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">259.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.55pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">78.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.55pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">30.3</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.15pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Other
    operating income (expenses), net</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.5pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(7.1)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.6pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(14.6)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.5pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">7.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.6pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(51.4)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.2pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Depreciation
    and amortization</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.6pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">773.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.6pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">657.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.65pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">116.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.6pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">17.8</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.15pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>(=)
    Adjusted EBITDA (excluding the agreement with AAPS)**</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.5pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2,591.2</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.55pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2,035.0</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.6pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>556.2</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.55pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>27.3</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.15pt; padding-left: 14.55pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(%)
    Adjusted EBITDA margin (excluding the agreement with AAPS)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">39.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.5pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">35.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-left: 3.45pt; line-height: 76%; text-indent: 11.1pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(%)
    Adjusted EBITDA margin (excluding the agreement with AAPS) on Net Revenue, excluding Construction</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 9.1pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">49.6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 9.1pt; padding-right: 2.5pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">45.0</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 2.55pt 0 0"><B><I>&nbsp;</I></B></P>

<P STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 48.6pt"><I>* Adjusted EBITDA corresponds to income before (i) other operating
income (expenses), net; (ii) financial result;</I></P>

<P STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin: 0 121.55pt 0 55.7pt"><I>(iii) income tax and social contribution; (iv) depreciation
and amortization expenses; and (v) incentivized dismissal program.</I></P>

<P STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin: 0.45pt 0 0"><I>&nbsp;</I></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 13.15pt">Excluding the effects of the agreement with AAPS, adjusted
EBITDA was R$ 2,591.2 million in 1Q24.</P>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 6.5pt 0 0 13.15pt">Considering the agreement with AAPS and construction
revenue, adjusted EBITDA came to R$ 2,428.8 million in 1Q24, with an adjusted EBITDA margin of 37.0% (R$ 9,500.3 million and 35.9% in
the last 12 months).</P>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 6.1pt 11.05pt 0 13.15pt">Excluding the effects of the agreement with
AAPS and construction costs, the adjusted EBITDA margin reached 49.6% in 1Q24, compared to 45.0% in 1Q23.</P>


<!-- Field: Page; Sequence: 25 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->23<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B>Comments on the Company&rsquo;s Performance</B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 14pt Arial, Helvetica, Sans-Serif; margin-top: 6.15pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 37.7pt"></TD><TD STYLE="width: 17.9pt"><FONT STYLE="color: #00009A">2.</FONT></TD><TD><FONT STYLE="color: navy">Revenue
                                            from sanitation services</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 12.5pt 19.95pt 0 55.65pt; text-align: justify">The gross operating income
from sanitation services, which excludes construction revenue, totaled R$ 5,661.1 million in 1Q24, an increase of R$ 751.8 million (+15.3%)
over the R$ 4,909.3 million recorded in 1Q23.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 6.15pt 0 0 55.65pt">The main factors that led to the increase were:</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 6pt 0 0 69.8pt; text-indent: -14pt"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 7pt">&nbsp;&nbsp;&nbsp;&nbsp;
</FONT><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Tariff adjustment of 9.6% since May 2023; and</FONT></P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 5.9pt 0 0 69.8pt; text-indent: -14pt"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 7pt">&nbsp;&nbsp;&nbsp;&nbsp;
</FONT><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">An increase of 5.3% in the total billed volume.</FONT></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 7.45pt 0 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 14pt Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 37.7pt"></TD><TD STYLE="width: 17.9pt"><FONT STYLE="color: #00009A">3.</FONT></TD><TD><FONT STYLE="color: navy">Construction
                                            revenue</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 11.95pt 0 0 55.7pt">Construction revenue increased by R$ 157.3 million (+13.3%),
due to higher investments made.</P>


<!-- Field: Page; Sequence: 26 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->24<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B>Comments on the Company&rsquo;s Performance</B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 14pt Arial, Helvetica, Sans-Serif; margin-top: 6.15pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 37.7pt"></TD><TD STYLE="width: 17.9pt"><FONT STYLE="color: #00009A">4.</FONT></TD><TD><FONT STYLE="color: navy">Billed
                                            volume</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 12.5pt 18.8pt 0 55.7pt">The following tables show the water and sewage
billed volumes, on a quarter-over-quarter basis, per customer category.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.2pt 0 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #9BC2E6">
    <TD COLSPAN="10" STYLE="border: black 1pt solid; padding-left: 2.8pt; text-align: center; line-height: 95%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>WATER
    AND SEWAGE BILLED VOLUME<SUP>(1)</SUP> PER CUSTOMER CATEGORY &ndash; million m<SUP>3</SUP></B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.05pt; padding-left: 0.55pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>Water</B></FONT></TD>
    <TD COLSPAN="3" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.05pt; padding-left: 0.7pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>Sewage</B></FONT></TD>
    <TD COLSPAN="3" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.05pt; padding-left: 33.25pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>Water
    + Sewage</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #DDEBF7">
    <TD STYLE="width: 30%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 5.9pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>Category</B></FONT></TD>
    <TD STYLE="width: 8%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 5.9pt; padding-right: 2.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>1Q24</B></FONT></TD>
    <TD STYLE="width: 8%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 5.9pt; padding-right: 2.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>1Q23</B></FONT></TD>
    <TD STYLE="width: 7%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 5.9pt; padding-right: 2.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>Var.
    %</B></FONT></TD>
    <TD STYLE="width: 8%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 5.9pt; padding-right: 2.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>1Q24</B></FONT></TD>
    <TD STYLE="width: 9%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 5.9pt; padding-right: 2.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>1Q23</B></FONT></TD>
    <TD STYLE="width: 7%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 5.9pt; padding-right: 2.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>Var.
    %</B></FONT></TD>
    <TD STYLE="width: 8%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 5.9pt; padding-right: 2.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>1Q24</B></FONT></TD>
    <TD STYLE="width: 8%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 5.9pt; padding-right: 2.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>1Q23</B></FONT></TD>
    <TD STYLE="width: 7%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 5.9pt; padding-right: 2.4pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>Var.
    %</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 6.15pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Residential</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.15pt; padding-right: 2.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">498.2</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.15pt; padding-right: 2.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">472.2</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.15pt; padding-right: 2.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">5.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.15pt; padding-right: 2.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">437.2</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.15pt; padding-right: 2.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">412.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.15pt; padding-right: 2.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">5.9</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.15pt; padding-right: 2.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">935.4</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.15pt; padding-right: 2.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">885.0</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.15pt; padding-right: 2.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">5.7</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Commercial</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">47.2</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">46.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">1.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">45.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">43.9</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">3.6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">92.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">90.6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">2.3</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.2pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Industrial</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">8.9</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">8.6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">3.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">9.6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">9.3</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">3.2</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">18.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">17.9</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">3.4</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Public</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">11.4</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">10.0</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">14.0</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">10.3</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">9.2</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">12.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">21.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">19.2</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 2.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">13.1</FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #F1F1F1">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.2pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>Total
    retail</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>565.7</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>537.5</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>5.2</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>502.6</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>475.2</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>5.8</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>1,068.3</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>1,012.7</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.2pt; padding-right: 2.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>5.5</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2.75pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Wholesale
    <SUP>(2)</SUP></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.75pt; padding-right: 2.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">11.6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.75pt; padding-right: 2.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">12.2</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.75pt; padding-right: 2.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">(4.9)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.75pt; padding-right: 2.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">5.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.75pt; padding-right: 2.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">5.6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.75pt; padding-right: 2.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">1.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.75pt; padding-right: 2.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">17.3</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.75pt; padding-right: 2.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">17.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.75pt; padding-right: 2.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">(2.8)</FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #F1F1F1">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 6.2pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>Overall
    Total</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.2pt; padding-right: 2.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>577.3</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.2pt; padding-right: 2.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>549.7</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.2pt; padding-right: 2.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>5.0</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.2pt; padding-right: 2.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>508.3</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.2pt; padding-right: 2.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>480.8</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.2pt; padding-right: 2.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>5.7</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.2pt; padding-right: 2.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>1,085.6</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.2pt; padding-right: 2.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>1,030.5</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.2pt; padding-right: 2.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>5.3</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 1.2pt 0 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 20.3pt"></TD><TD STYLE="width: 8.35pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><I>1</I></FONT></TD><TD><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><I>Unaudited
                                            by external auditors;</I></FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt Georgia, Times, Serif; margin-top: 0.05pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 20.3pt"></TD><TD STYLE="width: 6.65pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><I>2</I></FONT></TD><TD><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><I>Wholesale
                                            includes volumes of reuse water and non-domestic sewage.</I></FONT></TD></TR></TABLE>


<!-- Field: Page; Sequence: 27 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->25<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B>Comments on the Company&rsquo;s Performance</B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 14pt Arial, Helvetica, Sans-Serif; margin-top: 6.15pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 37.7pt"></TD><TD STYLE="width: 17.9pt"><FONT STYLE="color: #00009A">5.</FONT></TD><TD><FONT STYLE="color: navy">Costs,
                                            administrative &amp; selling expenses</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 12.5pt 0 0 41.5pt">Costs, administrative and selling expenses increased by
R$ 433.6 million in 1Q24 (+13.7%).</P>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 0.5pt 11.05pt 0 41.5pt">Costs, administrative and selling expenses as
a percentage of net revenue (excluding construction revenue) were 69.1% in 1Q24 compared to 70.2% in 1Q23.</P>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 6.1pt 18.8pt 0 41.5pt">Excluding the agreement with AAPS, costs and expenses
totaled R$ 3,445.0 million, an increase of R$ 271.2 million (+8.5%).</P>

<P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 3.8pt 14.05pt 0.2pt 0; text-align: right"><B><I>R$ million</I></B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD STYLE="border: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-left: 0.9pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Var.</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD STYLE="width: 65%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="width: 9%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 4.15pt; padding-left: 18.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1Q24</B></FONT></TD>
    <TD STYLE="width: 9%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 4.15pt; padding-left: 18.5pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1Q23</B></FONT></TD>
    <TD STYLE="width: 9%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 4.15pt; padding-left: 0.95pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>R$</B></FONT></TD>
    <TD STYLE="width: 8%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 4.15pt; padding-left: 1pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>%</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.45pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Salaries,
    payroll charges and benefits, and Pension plan obligations</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">708.4</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">744.2</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(35.8)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(4.8)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.45pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">General
    supplies</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">90.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">87.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">3.3</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">3.8</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.45pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Treatment
    supplies</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">141.4</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">164.9</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(23.5)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(14.3)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.4pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Services</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">682.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">624.9</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">57.9</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">9.3</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.4pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Electricity</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">394.3</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">395.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(1.5)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(0.4)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid"><P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 3.4pt 0 0 3.45pt">General expenses</P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 3.65pt 0 0 16.75pt"><I>Agreement with AAPS</I></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 3.5pt 0 0 19pt"><I>Share of the municipal government in the collection
    (S&atilde;o Paulo)</I></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 0 117.65pt 0 19pt"><I>Share of the municipal government in the collection
    (other municipalities) Other general expenses</I></P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; text-align: right"><P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt">605.0</P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>162.4</I></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>170.1</I></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>75.1</I></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>197.4</I></P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; text-align: right"><P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt">314.8</P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>-</I></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>149.6</I></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>36.9</I></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>128.3</I></P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; text-align: right"><P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt">290.2</P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>162.4</I></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>20.5</I></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>38.2</I></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>69.1</I></P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; text-align: right"><P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt">92.2</P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>-</I></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>13.7</I></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>103.5</I></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; text-align: right; margin-top: 3.4pt; margin-right: 0pt; margin-bottom: 0pt"><I>53.9</I></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.45pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Tax
    expenses</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">20.4</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">21.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(1.4)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">(6.4)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.45pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Depreciation
    and amortization</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">773.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">657.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">116.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">17.8</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.45pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Allowance
    for doubtful accounts</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">190.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">162.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">27.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.45pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">17.0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.4pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Costs,
    administrative &amp; selling expenses</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>3,607.4</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>3,173.8</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.45pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>433.6</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.4pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>13.7</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.15pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">%
    of net revenue (excluding construction revenue)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.4pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">69.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.15pt; padding-right: 2.35pt; text-align: right; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">70.2</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 6.6pt 0 0"><B><I>&nbsp;</I></B></P>

<P STYLE="font: bold 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 41.5pt; text-indent: 41.5pt; color: navy">Salaries, payroll charges
and benefits, and Pension plan obligations</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 11.5pt 0 0 41.5pt">In 1Q24, the R$ 35.8 million decrease (-4.8%) was mainly
due to the 10.9% reduction in the average number of employees, with an impact of R$ 64.4 million.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 5.95pt 11.05pt 0 41.5pt">The aforementioned decrease was partially offset
by the 4.9% salary adjustment in May 2023 and the application of 2.0% referring to the Career and Salary Plan in February 2024.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 1.05pt 0 0">&nbsp;</P>

<P STYLE="font: bold 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 41.5pt; text-indent: 41.5pt; color: navy">Treatment supplies</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.45pt 0 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/156% Arial, Helvetica, Sans-Serif; margin: 0 133.4pt 0 41.55pt; text-align: justify">Treatment supplies fell by
R$ 23.5 million (-14.3%) in 1Q24 compared to 1Q23. The decrease was mainly due to:</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 11pt/102% Georgia, Times, Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 55pt; text-align: right"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Decrease in some
product prices, part of which was impacted by the international market, considering the new products; and</FONT></TD>
</TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 11pt/103% Georgia, Times, Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 55pt; text-align: right"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Greater water availability
that allowed the optimization of water source usage, resulting in reduced use of algaecides, coagulants, and disinfectants. The Company
manages the use of chemicals and the advancement or retreat of the Production Systems by using systems that provide the best cost-effectiveness.</FONT></TD>
</TR></TABLE>

<P STYLE="font: bold 10pt Arial, Helvetica, Sans-Serif; margin: 10.65pt 0 0 41.5pt; text-indent: 41.5pt; color: navy">Services</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.95pt 0 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/103% Arial, Helvetica, Sans-Serif; margin: 0 11.05pt 0 41.5pt">Service expenses totaled R$ 682.8 million, an increase
of R$ 57.9 million (+9.3%) over the R$ 624.9 million recorded in 1Q23. The main increases were:</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 11pt Georgia, Times, Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 55pt; text-align: right"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">R$ 47.9 million
for the maintenance of water and sewage networks, connections, and systems; and</FONT></TD>
</TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 11pt Georgia, Times, Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 55pt; text-align: right"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">R$ 10.6 million
with technical services.</FONT></TD>
</TR></TABLE>


<!-- Field: Page; Sequence: 28 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->26<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B>Comments on the Company&rsquo;s Performance</B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: bold 10pt Arial, Helvetica, Sans-Serif; margin: 6.2pt 0 0 41.5pt; text-align: justify; text-indent: 41.5pt; color: navy">Electricity</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 11.4pt 27.05pt 0 41.5pt; text-align: justify">Electricity expenses totaled
R$ 394.3 million in 1Q24, a decrease of R$ 1.5 million (0.4%) from the R$ 395.8 million recorded in 1Q23. Of the total, the Free Market
Tariffs (ACL) accounted for 51.0% of total expenses in 1Q24 (55.0% in 1Q23) while the Regulated Market Tariffs (ACR) accounted for 49.0%
(45.0% in 1Q23).</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 6.1pt 0 0 41.5pt">The main factors that contributed to this variation were:</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 11pt/102% Georgia, Times, Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 55pt; text-align: right"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">An average decrease
of 4.5% in ACL prices (including Grid Market Tariffs - TUSD), with a 5.0% decrease in consumption; and</FONT></TD>
</TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 11pt Georgia, Times, Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 55pt; text-align: right"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">An average increase
of 8.6% in ACR tariffs, with a decrease of 1.8% in consumption.</FONT></TD>
</TR></TABLE>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 6.5pt 0 0">&nbsp;</P>

<P STYLE="font: bold 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 41.5pt; text-indent: 41.5pt; color: navy">General expenses</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 11.45pt 0 0 41.5pt">Increase of R$ 290.2 million (+92.2%), totaling R$ 605.0
million in 1Q24, compared to the R$ 314.8 million reported in 1Q23, mainly due to:</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 11pt Georgia, Times, Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 55pt; text-align: right"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Provision of R$
162.4 million in 1Q24, referring to the agreement with AAPS;</FONT></TD>
</TR></TABLE>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.35pt 0 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 11pt Georgia, Times, Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 55pt; text-align: right"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Increase of R$ 68.7
million in expenses with lawsuits; and</FONT></TD>
</TR></TABLE>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.45pt 0 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 11pt/102% Georgia, Times, Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 55pt; text-align: right"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Higher provision
for transfer to the Municipal Funds for Environmental Sanitation and Infrastructure, of R$ 58.7 million.</FONT></TD>
</TR></TABLE>

<P STYLE="font: 10pt/151% Arial, Helvetica, Sans-Serif; margin: 5.75pt 27.8pt 0 41.5pt">Expenses with municipal transfers totaled R$
245.2 million in 1Q24, compared to the R$ 186.5 million reported in 1Q23. Expenses with the use of water totaled R$ 25.0 million in 1Q24,
compared to the R$ 25.2 million reported in 1Q23.</P>

<P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 3.55pt 25pt 0 0; text-align: right"><B><I>R$ million</I></B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #95B3D7">
    <TD COLSPAN="6" STYLE="border-bottom: black 1pt solid; padding-top: 1.6pt; padding-left: 1.2pt; text-align: center; line-height: 90%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>Municipal
    Transfers</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD STYLE="width: 52%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.1pt; padding-left: 0.55pt; text-align: center; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Municipality</B></FONT></TD>
    <TD STYLE="width: 11%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 3.1pt; padding-left: 0.7pt; text-align: center; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2024</B></FONT></TD>
    <TD STYLE="width: 11%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 3.1pt; padding-left: 0.8pt; text-align: center; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2023</B></FONT></TD>
    <TD STYLE="width: 10%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 3.1pt; padding-left: 13.45pt; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Var.</B></FONT></TD>
    <TD STYLE="width: 10%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 3.1pt; padding-left: 9.5pt; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Var.
    %</B></FONT></TD>
    <TD STYLE="width: 6%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 3.1pt; padding-left: 1.3pt; text-align: center; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Start</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.1pt; padding-left: 3.45pt; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">S&Atilde;O
    PAULO</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.1pt; padding-right: 2.65pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">170.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.1pt; padding-right: 2.6pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">149.6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.1pt; padding-right: 2.6pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">20.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.1pt; padding-right: 2.6pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">13.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.1pt; padding-left: 9pt; text-align: center; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Jun/10</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.1pt; padding-left: 3.45pt; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">BARUERI</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.1pt; padding-right: 2.65pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">10.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.1pt; padding-right: 2.6pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.1pt; padding-right: 2.6pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">10.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.1pt; padding-right: 2.6pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.1pt; padding-left: 6.8pt; text-align: center; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">May/23</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.05pt; padding-left: 3.45pt; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">GUARULHOS</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.05pt; padding-right: 2.6pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">7.4</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.05pt; padding-right: 2.55pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.05pt; padding-right: 2.55pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">7.4</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.05pt; padding-right: 2.6pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.05pt; padding-right: 0.05pt; padding-left: 6.8pt; text-align: center; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Dec/23</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.05pt; padding-left: 3.45pt; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">DIADEMA</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.05pt; padding-right: 3.2pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">2.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.05pt; padding-right: 6.2pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.05pt; padding-right: 2.6pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">2.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.05pt; padding-right: 2.55pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.05pt; padding-left: 11.7pt; text-align: center; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Jul/23</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.05pt; padding-left: 3.45pt; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">OTHER
    MUNICIPALITIES</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.05pt; padding-right: 2.6pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">54.3</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.05pt; padding-right: 3.15pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">36.9</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.05pt; padding-right: 2.6pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">17.4</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.05pt; padding-right: 2.6pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">47.2</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.8pt; padding-left: 3.45pt; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>TOTAL</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.8pt; padding-right: 3.2pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>245.2</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.8pt; padding-right: 3.15pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>186.5</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.8pt; padding-right: 2.65pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>58.7</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.8pt; padding-right: 2.6pt; text-align: right; line-height: 72%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>31.5</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 9.1pt 0 0"><B><I>&nbsp;</I></B></P>

<P STYLE="font: bold 10pt Arial, Helvetica, Sans-Serif; margin: 0.05pt 0 0 41.6pt; color: navy">Depreciation and amortization</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 11.45pt 0 0 41.5pt">The R$ 116.7 million increase (+17.8%) was due to the
beginning of operations of intangible assets, totaling R$ 7.2 billion.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.55pt 0 0">&nbsp;</P>

<P STYLE="font: bold 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 41.5pt; text-indent: 41.5pt; color: navy">Allowance for doubtful
accounts</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.4pt 0 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 11.05pt 0 41.5pt">Increase of R$ 27.7 million (+17.0%), moving up from R$
162.8 million in 1Q23 to R$ 190.5 million in 1Q24, in line with the increased reported in sanitation revenue.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 6.05pt 0 0 41.5pt">Expenses with allowance for doubtful accounts as a percentage
of sanitation revenue moved up from 3.3% in 1Q23 to 3.4% in 1Q24.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.5pt 0 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 14pt Arial, Helvetica, Sans-Serif; margin-top: 0.05pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 37.7pt"></TD><TD STYLE="width: 17.9pt"><FONT STYLE="color: #00009A">6.</FONT></TD><TD><FONT STYLE="color: navy">Other
                                            net operating income (expenses)</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 16pt 18.8pt 0 41.5pt">Negative variation of R$ 7.5 million, mainly due to
the non-recurring revenue from the sale of unusable materials in 1Q23, of R$ 6.1 million.</P>


<!-- Field: Page; Sequence: 29 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->27<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B>Comments on the Company&rsquo;s Performance</B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 1.15pt 0 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 49%; padding-left: 32.3pt; line-height: 130%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 14pt; color: #00009A"><B>7.
    </B></FONT><B><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 14pt; color: navy">Financial result</FONT></B></TD>
    <TD STYLE="width: 23%">&nbsp;</TD>
    <TD STYLE="width: 9%">&nbsp;</TD>
    <TD STYLE="width: 10%">&nbsp;</TD>
    <TD STYLE="width: 9%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 6.95pt 0 0">&nbsp;</P>
    <P STYLE="font: 9pt/77% Times New Roman, Times, Serif; margin: 0 3.35pt 0 0; text-align: right"><B><I>R$ million</I></B></P></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2.2pt; padding-right: -5.8pt; padding-left: 38.2pt; line-height: 79%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Var.</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2.2pt; padding-left: 5.65pt; line-height: 79%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD STYLE="border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.5pt; padding-left: 74.7pt; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>1Q24</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.5pt; padding-left: 7.4pt; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>1Q23</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.5pt; padding-right: 6.3pt; text-align: center; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>R$</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.5pt; padding-right: 6pt; text-align: center; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>%</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.55pt; padding-left: 4.2pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    expenses, net of revenue</FONT></TD>
    <TD STYLE="padding-top: 1.55pt; padding-right: 20.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(302.9)</FONT></TD>
    <TD STYLE="padding-top: 1.55pt; padding-right: 0.05in; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(257.2)</FONT></TD>
    <TD STYLE="padding-top: 1.55pt; padding-left: 26.65pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(45.7)</FONT></TD>
    <TD STYLE="padding-top: 1.55pt; padding-right: 3.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">17.8</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.05pt; padding-left: 4.2pt; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Monetary
    and exchange variations, net</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.05pt; padding-right: 20.6pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(35.3)</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.05pt; padding-right: 3.5pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(2.3)</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.05pt; padding-left: 26.65pt; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(33.0)</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.05pt; padding-right: 3.5pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,434.8</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.5pt; padding-left: 4.15pt; line-height: 79%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Financial
    Result</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.5pt; padding-right: 20.6pt; text-align: right; line-height: 79%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(338.2)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.5pt; padding-right: 3.55pt; text-align: right; line-height: 79%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(259.5)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.5pt; padding-left: 26.65pt; line-height: 79%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(78.7)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.5pt; padding-right: 3.55pt; text-align: right; line-height: 79%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>30.3</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 10.2pt 0 0">&nbsp;</P>

<P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 9.55pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD COLSPAN="3" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="border-bottom: black 1pt solid; padding-top: 2.2pt; padding-right: 0.25pt; text-align: right; line-height: 79%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 9pt"><B><I>R$
    million</I></B></FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD COLSPAN="3" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="border-bottom: black 1pt solid; padding-top: 2.2pt; padding-right: 0.25pt; text-align: center; line-height: 79%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Var.</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD STYLE="border-bottom: Black 1pt solid; padding-top: 1.5pt; text-align: right; line-height: 78%; width: 60%">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-top: 1.5pt; text-align: center; line-height: 78%; width: 12%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>1Q24&#9;</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: Black 1pt solid; padding-top: 1.5pt; text-align: center; line-height: 78%; width: 11%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>1Q23</B></FONT></TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: center; padding-top: 1.5pt; line-height: 78%; width: 10%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>R$&#9;</B></FONT></TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: center; padding-top: 1.5pt; line-height: 78%; width: 7%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>%</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 9.55pt">Financial expenses</P>

<P STYLE="font: 4pt Arial, Helvetica, Sans-Serif; margin: 0.35pt 0 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 60%; padding-left: 11.65pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Interest
    and charges on domestic borrowings and financing</FONT></TD>
    <TD STYLE="width: 12%; padding-right: 8.4pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(276.6)</FONT></TD>
    <TD STYLE="width: 11%; padding-right: 5.95pt; padding-left: 11.5pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(273.1)</FONT></TD>
    <TD STYLE="width: 10%; padding-right: 6.25pt; padding-left: 5.1pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(3.5)</FONT></TD>
    <TD STYLE="width: 7%; padding-right: 3.45pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1.3</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.15pt; padding-left: 11.65pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Interest
    and charges on international borrowings and financing</FONT></TD>
    <TD STYLE="padding-top: 2.15pt; padding-right: 8.4pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(28.7)</FONT></TD>
    <TD STYLE="padding-top: 2.15pt; padding-right: 8.45pt; padding-left: 11.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(21.0)</FONT></TD>
    <TD STYLE="padding-top: 2.15pt; padding-right: 6.25pt; padding-left: 5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(7.7)</FONT></TD>
    <TD STYLE="padding-top: 2.15pt; padding-right: 3.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">36.7</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2.15pt; padding-left: 11.7pt; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    financial expenses</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2.15pt; padding-right: 8.4pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(189.3)</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2.15pt; padding-right: 6pt; padding-left: 11.5pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(122.1)</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2.15pt; padding-right: 6.25pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(67.2)</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2.15pt; padding-right: 3.45pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">55.0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.5pt; padding-left: 4.2pt; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Total
    financial expenses</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.5pt; padding-right: 8.4pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(494.6)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.5pt; padding-right: 5.95pt; padding-left: 11.5pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(416.2)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.5pt; padding-right: 6.25pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(78.4)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.5pt; padding-right: 3.45pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>18.8</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 4.55pt; padding-left: 4.2pt; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Financial
    revenue</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 4.55pt; padding-right: 8.4pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">191.7</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 4.55pt; padding-right: 8.45pt; padding-left: 11.5pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">159.0</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 4.55pt; padding-right: 6.25pt; padding-left: 5.95pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">32.7</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 4.55pt; padding-right: 3.5pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">20.6</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.55pt; padding-left: 4.2pt; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Financial
    expenses, net of revenue</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 8.4pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(302.9)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 5.95pt; padding-left: 11.5pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(257.2)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 6.25pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(45.7)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 3.45pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>17.8</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 2.4pt 0 0">&nbsp;</P>

<P STYLE="font: bold 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 41.5pt; text-indent: 1.05pt; color: navy">Financial expenses, net
of revenue</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 11.5pt 0 0 55.7pt">The main impacts resulted from:</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/102% Georgia, Times, Serif; margin-top: 11.45pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 41.6pt"></TD><TD STYLE="width: 14.1pt"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="padding-right: 27.1pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Increase
                                            of R$ 7.7 million in interest and charges on international borrowings and financing, mainly
                                            due to new IDB fundraising;</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/102% Georgia, Times, Serif; margin-top: 5.7pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 41.6pt"></TD><TD STYLE="width: 14.1pt"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="padding-right: 27pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Increase
                                            of R$ 67.2 million in other financial expenses, due to the R$ 60.1 million increase in interest
                                            on PPP; and</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/102% Georgia, Times, Serif; margin-top: 5.75pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 41.6pt"></TD><TD STYLE="width: 14.1pt"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="padding-right: 27pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Increase
                                            of R$ 32.7 million in financial revenues, mainly due to higher interest charged on overdue
                                            bills in 1Q24.</FONT></TD></TR></TABLE>

<P STYLE="font: 9pt Times New Roman, Times, Serif; margin: 7.4pt 10.1pt 0 0; text-align: right"><B><I>R$ million</I></B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD COLSPAN="3" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="border-bottom: black 1pt solid; padding-top: 2.05pt; padding-right: 0.25pt; text-align: center; line-height: 80%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Var.</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD STYLE="border-bottom: Black 1pt solid; padding-top: 1.35pt; text-align: center; line-height: 80%; width: 56%">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-top: 1.35pt; text-align: center; line-height: 80%; width: 17%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>1Q24&#9;</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.35pt; text-align: center; line-height: 80%; width: 10%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>1Q23</B></FONT></TD>
    <TD STYLE="text-align: center; border-bottom: black 1pt solid; padding-top: 1.35pt; line-height: 80%; width: 9%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>R$&#9;</B></FONT></TD>
    <TD STYLE="text-align: center; border-bottom: black 1pt solid; padding-top: 1.35pt; line-height: 80%; width: 8%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>%</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; text-align: left; margin-top: 4.65pt; margin-right: 0; margin-bottom: 0">Monetary and exchange variations on liabilities</P>

<P STYLE="font: 4pt Arial, Helvetica, Sans-Serif; margin: 0.3pt 0 0.05pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 56%; padding-left: 11.3pt; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Monetary
    variations on borrowings and financing</FONT></TD>
    <TD STYLE="width: 17%; padding-right: 9.05pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(54.0)</FONT></TD>
    <TD STYLE="width: 10%; padding-right: 9.05pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(70.5)</FONT></TD>
    <TD STYLE="width: 9%; padding-right: 6.2pt; padding-left: 5.9pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">16.5</FONT></TD>
    <TD STYLE="width: 8%; padding-right: 3.55pt; text-align: right; line-height: 83%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(23.4)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 2.15pt; padding-left: 11.3pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Exchange
    variations on borrowings and financing</FONT></TD>
    <TD STYLE="padding-top: 2.15pt; padding-right: 9.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">6.3</FONT></TD>
    <TD STYLE="padding-top: 2.15pt; padding-right: 9.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">83.8</FONT></TD>
    <TD STYLE="padding-top: 2.15pt; padding-right: 5.85pt; padding-left: 5.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(77.5)</FONT></TD>
    <TD STYLE="padding-top: 2.15pt; padding-right: 3.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(92.5)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2.15pt; padding-left: 11.3pt; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Other
    monetary variations</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2.15pt; padding-right: 9.05pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(43.5)</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2.15pt; padding-right: 9.05pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(75.7)</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2.15pt; padding-right: 6.2pt; padding-left: 5.85pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">32.2</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2.15pt; padding-right: 3.55pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(42.5)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.55pt; padding-left: 3.8pt; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Total
    monetary and exchange variations on liabilities</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 9.05pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(91.2)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 9.05pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(62.4)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 5.85pt; padding-left: 5.7pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(28.8)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 3.55pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>46.2</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 5.25pt; padding-left: 3.8pt; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Monetary
    and exchange variations on assets</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 5.25pt; padding-right: 9.05pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">55.9</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 5.25pt; padding-right: 9.05pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">60.1</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 5.25pt; padding-right: 6.2pt; padding-left: 5.7pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(4.2)</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 5.25pt; padding-right: 3.45pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(7.0)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 3.75pt; padding-left: 3.8pt; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Monetary
    and exchange variations, net</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 9.05pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(35.3)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 9.05pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(2.3)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 5.9pt; padding-left: 5.7pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>(33.0)</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 3.5pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>1,434.8</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 7.75pt 0 0">&nbsp;</P>

<P STYLE="font: bold 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 41.5pt; text-align: justify; text-indent: 41.5pt; color: navy">Monetary
and exchange variations, net</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 5.95pt 0 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.05pt 0 0 41.5pt; text-align: justify">The negative effect of net monetary
and exchange variations in 1Q24 was R$ 33.0 million, especially due to:</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/103% Georgia, Times, Serif; margin-top: 5.9pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 41.6pt"></TD><TD STYLE="width: 14.1pt"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="text-align: justify; padding-right: 27.05pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">A
                                            decrease of R$ 16.5 million in monetary variations on borrowings and financing, mainly because
                                            of (i) a decrease in IPCA (from 2.09% in 1Q23 to 1.42% in 1Q24); and (ii) higher capitalization
                                            of monetary variation on debentures in 1Q24, of R$ 5.5 million;</FONT></TD></TR></TABLE>


<!-- Field: Page; Sequence: 30 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->28<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B>Comments on the Company&rsquo;s Performance</B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/103% Georgia, Times, Serif; margin-top: 6.15pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 41.55pt"></TD><TD STYLE="width: 14.1pt"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="text-align: justify; padding-right: 27pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">A
                                            reduction of R$ 77.5 million in exchange variation gains on borrowings and financing, due
                                            to the appreciation of the U.S. dollar and depreciation of the Yen in 1Q24 (3.2% and -3.5%,
                                            respectively), compared to the depreciation recorded in both currencies in 1Q23 (-2.6% and
                                            -3.3%, respectively); and</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/102% Georgia, Times, Serif; margin-top: 5.5pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 41.55pt"></TD><TD STYLE="width: 14.1pt"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT></TD><TD STYLE="text-align: justify; padding-right: 27.05pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">A
                                            decrease of R$ 32.2 million in other monetary variations, mainly due to lower monetary variation
                                            on Public-Private Partnership (PPPs) agreements in 1Q24, of R$ 34.2 million.</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.75pt 0 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 14pt Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 37.7pt"></TD><TD STYLE="width: 17.9pt"><FONT STYLE="color: #00009A">8.</FONT></TD><TD><FONT STYLE="color: navy">Income
                                            tax and social contribution</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 11.5pt 0 0 41.5pt">The R$ 114.8 million increase (+29.8%) in 1Q24 was mainly
due to the R$ 861.8 million increase in net operating income, mainly offset by:</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 5.95pt 0 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0 0 0 55.65pt; text-indent: -14.05pt"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 7pt">&nbsp;&nbsp;&nbsp;&nbsp;
</FONT><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">R$ 433.6 million increase in costs and expenses; and</FONT></P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 5.95pt 0 0 55.65pt; text-indent: -14.05pt"><FONT STYLE="font-family: Noto Sans Symbols; font-size: 10pt">&#9679;</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 7pt">&nbsp;&nbsp;&nbsp;&nbsp;
</FONT><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Negative variation of R$ 78.7 million in the financial
result.</FONT></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 1.45pt 0 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 14pt Arial, Helvetica, Sans-Serif; margin-top: 0.05pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 37.7pt"></TD><TD STYLE="width: 17.9pt"><FONT STYLE="color: #00009A">9.</FONT></TD><TD><FONT STYLE="color: navy">Indicators</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 10pt Arial, Helvetica, Sans-Serif; margin-top: 11.45pt; margin-bottom: 0; color: navy"><TR STYLE="vertical-align: top">
<TD STYLE="width: 41.5pt"></TD><TD STYLE="width: 17.9pt">a)</TD><TD>Operational</TD></TR></TABLE>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.05pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD STYLE="width: 65%; border: black 1pt solid; padding-top: 2.7pt; padding-left: 68.15pt; line-height: 87%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>Information
    <SUP>*</SUP></B></FONT></TD>
    <TD STYLE="width: 13%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.7pt; padding-left: 17.15pt; line-height: 79%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>1Q24</B></FONT></TD>
    <TD STYLE="width: 12%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.7pt; padding-left: 16.2pt; line-height: 79%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>1Q23</B></FONT></TD>
    <TD STYLE="width: 10%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.7pt; padding-left: 0.4pt; text-align: center; line-height: 79%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>%</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2.35pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Water
    Connections<SUP>1</SUP></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.85pt; padding-right: 2.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">9,424</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 2.85pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">9,375</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 2.95pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0.5</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2.35pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Sewage
    Connections<SUP>1</SUP></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.85pt; padding-right: 2.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,119</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 2.85pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">8,049</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 2.95pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0.9</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2.35pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Population
    Directly Served - Water<SUP>2</SUP></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.8pt; padding-right: 2.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">28.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 2.95pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">28.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 3pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0.0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2.45pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Population
    Directly Served - Sewage<SUP>2</SUP></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.85pt; padding-right: 2.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">24.9</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.85pt; padding-right: 2.95pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">24.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.85pt; padding-right: 3pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">0.4</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2.45pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Number
    of Employees</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.85pt; padding-right: 2.9pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">10,672</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.85pt; padding-right: 2.95pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">12,211</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.85pt; padding-right: 3.05pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(12.6)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.95pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Volume
    of water produced in the quarter <SUP>3</SUP></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 2.9pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">772</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 2.95pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">733</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 3pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">5.4</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.9pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">IPM
    - Measured Water Loss (%) <SUP>3</SUP></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 2.95pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">29.2%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 3pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">29.5%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 3.75pt; padding-right: 3pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">(1.0)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 3.4pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">IPDt
    (liters/connection x day) <SUP>3</SUP></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.25pt; padding-right: 2.9pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">260</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.25pt; padding-right: 2.95pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">255</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.25pt; padding-right: 3pt; text-align: right; line-height: 78%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">2.0</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.5pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 10pt; text-align: right">1.</TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify">Active connections in thousand units at the end of the period.</TD>
</TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 10pt; text-align: right">2.</TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify">In million inhabitants, at the end of the period. Does not include wholesale.</TD>
</TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 10pt; text-align: right">3.</TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify">Millions of m<SUP>3</SUP><SUB>.</SUB></TD>
</TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 10pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif">*</FONT></TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif">Unaudited by external auditors;</FONT></TD>
</TR></TABLE>

<P STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin: 2.35pt 0 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 10pt Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0; color: navy"><TR STYLE="vertical-align: top">
<TD STYLE="width: 41.5pt"></TD><TD STYLE="width: 17.9pt">b)</TD><TD>Economic</TD></TR></TABLE>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.05pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD STYLE="width: 72%; border: black 1pt solid; padding-top: 0.65pt; padding-left: 46.2pt; line-height: 94%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Economic
    variables at the close of the quarter *</FONT></TD>
    <TD STYLE="width: 14%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 0.7pt; padding-left: 18.25pt; line-height: 93%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>1Q24</B></FONT></TD>
    <TD STYLE="width: 14%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 0.7pt; padding-left: 17.75pt; line-height: 93%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>1Q23</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2.55pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Amplified
    Consumer Price Index <SUP>1</SUP></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.55pt; padding-right: 2.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1.42</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.55pt; padding-right: 2.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">2.09</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2.55pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">National
    Consumer Price Index <SUP>1</SUP></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.55pt; padding-right: 2.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1.58</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.55pt; padding-right: 2.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1.88</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2.55pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Consumer
    Price Index <SUP>1</SUP></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.55pt; padding-right: 2.65pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1.18</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.55pt; padding-right: 2.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1.46</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2.55pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">DI
    <SUP>2</SUP></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.55pt; padding-right: 2.7pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">11.28</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.55pt; padding-right: 2.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">13.65</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2.55pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">U.S.
    dollar <SUP>3</SUP></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.55pt; padding-right: 2.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">4.9962</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.55pt; padding-right: 2.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">5.0804</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2.8pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Yen
    <SUP>3</SUP></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.8pt; padding-right: 2.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">0.03301</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.8pt; padding-right: 2.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">0.03827</FONT></TD></TR>
  </TABLE>
<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 10pt; text-align: right">1.</TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify">Accrued in the quarter (%)</TD>
</TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 10pt; text-align: right">2.</TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify">Average quarterly rate (%)</TD>
</TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 10pt; text-align: right"><SUP>.</SUP>3.</TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify">Ptax sale rate on the last day</TD>
</TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin-top: 0pt; margin-bottom: 6pt; width: 100%"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 10pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif">*</FONT></TD><TD STYLE="width: 5pt"></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif">Unaudited by external auditors</FONT></TD>
</TR></TABLE>


<!-- Field: Page; Sequence: 31 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->29<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B>Comments on the Company&rsquo;s Performance</B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 14pt Arial, Helvetica, Sans-Serif; margin-top: 6.15pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 34.5pt"></TD><TD STYLE="width: 21.15pt"><FONT STYLE="color: #00009A">10.</FONT></TD><TD><FONT STYLE="color: navy">Borrowings
                                            and financing</FONT></TD></TR></TABLE>

<P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 2.15pt 0 0"><B>&nbsp;</B></P>

<P STYLE="font: 8pt Calibri, Helvetica, Sans-Serif; margin: 0 11.85pt 0 0; text-align: right"><B><I>R$ thousand</I></B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD COLSPAN="10" STYLE="padding-top: 1.6pt; padding-left: 35.1pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>DEBT
    PROFILE</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD COLSPAN="2" STYLE="padding-top: 6.7pt; padding-right: 26.4pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2024</B></FONT></TD>
    <TD STYLE="padding-top: 6.7pt; padding-left: 12.4pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2025</B></FONT></TD>
    <TD STYLE="padding-top: 6.7pt; padding-left: 12.4pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2026</B></FONT></TD>
    <TD STYLE="padding-top: 6.7pt; padding-left: 12.35pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2027</B></FONT></TD>
    <TD STYLE="padding-top: 6.7pt; padding-left: 12.3pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2028</B></FONT></TD>
    <TD STYLE="padding-top: 6.7pt; padding-left: 12.3pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2029</B></FONT></TD>
    <TD STYLE="padding-top: 2.15pt; padding-right: 11.25pt; padding-left: 11.05pt; text-align: center; text-indent: -4pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2030
    onwards</B></FONT></TD>
    <TD STYLE="padding-top: 6.7pt; padding-left: 10.05pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>TOTAL</B></FONT></TD>
    <TD STYLE="padding-top: 2.15pt; padding-right: 5.25pt; padding-left: 5.5pt; text-align: center; text-indent: -1.05pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>%
    of total</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 30%; padding-top: 1.65pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B><I>Local
    currency</I></B></FONT></TD>
    <TD STYLE="width: 9%">&nbsp;</TD>
    <TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 8%">&nbsp;</TD>
    <TD STYLE="width: 5%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.6pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Brazilian
    Federal Savings Bank</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 10.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">82,048</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 3.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">115,356</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 8.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">122,556</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 5.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">130,195</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 8.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">138,177</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 7.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">143,481</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 4.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">868,098</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 4.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1,599,911</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">7</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.65pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">IDBs
    - National</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 10.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">139,754</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 3.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">260,899</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 8.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">330,209</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 5.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">315,069</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 8.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">420,959</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 7.3pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">385,919</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 4.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1,971,918</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 4.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">3,824,727</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">17</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.6pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">IFC</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 10.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">22,800</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 3.4pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">44,200</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 8.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">61,800</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 5.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">80,800</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 8.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">123,600</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 7.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">181,600</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 4.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1,209,145</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 4.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1,723,945</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 3.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">8</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.65pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Debentures</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 10.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">905,061</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1,328,730</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 8.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1,217,890</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 5.15pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1,387,314</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 8.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">665,375</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 7.3pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1,304,027</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 4.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">3,218,442</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 4.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">10,026,839</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">46</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.6pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">BNDES</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 10.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">210,955</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">260,803</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 8.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">250,860</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 5.15pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">238,124</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 8.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">84,351</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 7.3pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">34,189</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 4.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">189,563</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 4.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1,268,845</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">6</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.65pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Other</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 10.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">2,254</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 3.4pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">2,771</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 8.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">142</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 5.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 8.35pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 7.15pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 4.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 4.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">5,167</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.65pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Leases
    (Concession Agreements, Program Contracts, and Contract Asset) (1)</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 10.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">78,403</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 3.4pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">42,199</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 8.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">19,538</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 5.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">19,538</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 8.35pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">19,538</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 7.15pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">19,012</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 4.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">114,209</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 4.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">312,437</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 0.75pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Leases
    (Others) (2)</FONT></TD>
    <TD STYLE="padding-top: 0.75pt; padding-right: 10.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">73,415</FONT></TD>
    <TD STYLE="padding-top: 0.75pt; padding-right: 3.4pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">90,971</FONT></TD>
    <TD STYLE="padding-top: 0.75pt; padding-right: 8.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">44,524</FONT></TD>
    <TD STYLE="padding-top: 0.75pt; padding-right: 5.15pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">3,361</FONT></TD>
    <TD STYLE="padding-top: 0.75pt; padding-right: 8.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">39,379</FONT></TD>
    <TD STYLE="padding-top: 0.75pt; padding-right: 7.15pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 0.75pt; padding-right: 4.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 0.75pt; padding-right: 4.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">251,650</FONT></TD>
    <TD STYLE="padding-top: 0.75pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.6pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Interest
    and Other Charges</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 10.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">304,965</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">74,729</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 8.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 5.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 8.4pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 0.1in; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 4.15pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 4.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">379,694</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">2</FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #C5D9F1">
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B><I>Total
    in local currency</I></B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 10.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1,819,655</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 3.4pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2,220,658</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 8.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2,047,519</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 5.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2,174,401</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 8.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1,491,379</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 7.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2,068,228</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 4.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>7,571,375</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 4.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>19,393,215</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>88</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><P STYLE="font: 8pt Calibri, Helvetica, Sans-Serif; margin: 3.15pt 0 0"><B><I>&nbsp;</I></B></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 3.45pt"><B><I>Foreign currency</I></B></P></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.6pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">IDBs</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 10.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">25,676</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">71,361</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 8.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">40,019</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 5.15pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">40,019</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 8.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">40,019</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 7.3pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">40,019</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 4.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">556,235</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 4.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">813,348</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 3.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">4</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.65pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">IBRDs</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 10.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">15,188</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">30,375</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 8.9pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">30,375</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 5.15pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">30,375</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 8.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">30,375</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 7.3pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">41,525</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 4.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">329,045</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 4.6pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">507,258</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 3.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">2</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.6pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">JICAs</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 10.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">75,585</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">141,639</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 8.95pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">141,639</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 5.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">141,639</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 8.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">141,639</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 7.35pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">141,526</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 4.3pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">503,886</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 4.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">1,287,553</FONT></TD>
    <TD STYLE="padding-top: 1.6pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">6</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-top: 1.65pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Interest
    and Other Charges</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 10.5pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">19,741</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">3,192</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 8.8pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 5.05pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 8.4pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 0.1in; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 4.15pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 4.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">22,933</FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">0</FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #C5D9F1">
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B><I>Total
    in foreign currency</I></B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 10.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>136,190</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 3.4pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>246,567</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 8.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>212,033</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 5.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>212,033</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 8.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>212,033</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 7.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>223,070</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 4.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1,389,166</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 4.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2,631,092</B></FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; padding-top: 2pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>12</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top; background-color: #8EB4E2">
    <TD STYLE="padding-top: 1.65pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B><I>OVERALL
    TOTAL</I></B></FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 10.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1,955,845</B></FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 3.4pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2,467,225</B></FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 8.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2,259,552</B></FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 5.1pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2,386,434</B></FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 8.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>1,703,412</B></FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 7.25pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>2,291,298</B></FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 4.2pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>8,960,541</B></FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 4.55pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>22,024,307</B></FONT></TD>
    <TD STYLE="padding-top: 1.65pt; padding-right: 3.45pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>100</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 7pt Calibri, Helvetica, Sans-Serif; margin: 0"><B><I>&nbsp;</I></B></P>

<P STYLE="font: 7pt Calibri, Helvetica, Sans-Serif; margin: 0"><B><I>&nbsp;</I></B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 7pt Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 41.5pt"></TD><TD STYLE="width: 7.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif">1</FONT></TD><TD><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif">Refers
                                            to work contracts signed as Assets Lease;</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin-top: 3.95pt; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 41.55pt"></TD><TD STYLE="width: 5.75pt">2</TD><TD>Obligations related to leasing agreements, mainly vehicle leases.</TD></TR></TABLE>

<P STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin: 6.95pt 0 0">&nbsp;</P>

<P STYLE="font: bold 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 41.5pt; text-indent: 41.5pt; color: navy">Covenants</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.45pt 0 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 55.7pt">The table below shows the most restrictive clauses in 1Q24:</P>

<P STYLE="font: 5pt Arial, Helvetica, Sans-Serif; margin: 0.35pt 0 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #8FA9DB">
    <TD COLSPAN="2" STYLE="border: black 1pt solid; padding-top: 3.15pt; padding-right: 11.85pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Covenants</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 60%; border-left: black 1pt solid; padding-top: 1.65pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Adjusted
    EBITDA / Adjusted Financial Expenses</FONT></TD>
    <TD STYLE="width: 40%; border-right: black 1pt solid; padding-top: 1.65pt; padding-left: 71.95pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Equal
    to or higher than 2.80</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-left: black 1pt solid; padding-top: 1.6pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">EBITDA
    / Financial Expenses Paid</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; padding-top: 1.6pt; padding-left: 71.95pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Equal
    to or higher than 2.35</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-left: black 1pt solid; padding-top: 1.65pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Adjusted
    Net Debt / Adjusted EBITDA</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; padding-top: 1.65pt; padding-right: 0.05pt; padding-left: 71.95pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Equal
    to or lower than 3.80</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-left: black 1pt solid; padding-top: 1.6pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Net
    Debt / Adjusted EBITDA</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; padding-top: 1.6pt; padding-right: 0.1pt; padding-left: 71.95pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Equal
    to or lower than 3.50</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-left: black 1pt solid; padding-top: 2.25pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Other
    Onerous Debt <SUP>1</SUP> / Adjusted EBITDA</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; padding-top: 1.8pt; padding-left: 71.95pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Equal
    to or lower than 1.30</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 0.7pt; padding-left: 3.45pt; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Adjusted
    Current Ratio</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 0.7pt; padding-right: 0.05pt; padding-left: 71.95pt; text-align: center; line-height: 69%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Higher
    than 1.00</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 7pt Arial, Helvetica, Sans-Serif; margin: 0 121.55pt 0 57.95pt">1 &ldquo;Other Onerous Debts&rdquo; correspond to the
sum of pension plan obligations and healthcare plan, installment payment of tax debts, and installment payment of debts with the electricity
supplier.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 6.05pt 0 0 41.5pt">In 1Q24 and 1Q23, the Company met the requirements of its
borrowings and financing agreements.</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.5pt 0 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 14pt Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 34.4pt"></TD><TD STYLE="width: 28.35pt"><FONT STYLE="color: #00009A">11.</FONT></TD><TD><FONT STYLE="color: navy">Investments</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 11.45pt 27pt 0 41.5pt; text-align: justify">Investments totaled R$ 1,420.3
million in 1Q24, presented as additions in the notes to the quarterly information under Contract Asset, Intangible Assets, and Property,
Plant and Equipment, of R$ 1,270.6 million, R$ 133.8 million, and R$ 15.9 million, respectively. Cash disbursed in the period referring
to investments, including from previous periods, totaled R$ 587.3 million.</P>


<!-- Field: Page; Sequence: 32 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->30<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B>Comments on the Company&rsquo;s Performance</B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 6.15pt 0 0 41.5pt">The table below shows investments broken down by water
and sewage:</P>

<P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 9.9pt 0 0 72.7pt; text-align: right"><B><I>R$ million</I></B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #95B3D7">
    <TD COLSPAN="2" STYLE="border-top: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 1.8pt; padding-right: 16.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Water</B></FONT></TD>
    <TD STYLE="border-top: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.8pt; padding-left: 9.75pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Sewage</B></FONT></TD>
    <TD STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.8pt; padding-left: 0.75pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>Total</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 55%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 1.85pt; padding-left: 3.45pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">Investments
    made</FONT></TD>
    <TD STYLE="width: 17%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 1.85pt; padding-left: 30.65pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">669.2</FONT></TD>
    <TD STYLE="width: 15%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 1.85pt; padding-left: 23.6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">751.1</FONT></TD>
    <TD STYLE="width: 13%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 1.85pt; padding-left: 5.95pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt">1,420.3</FONT></TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 5.7pt 0 0"><B><I>&nbsp;</I></B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: bold 14pt Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 34.4pt"></TD><TD STYLE="width: 28.35pt"><FONT STYLE="color: #00009A">12.</FONT></TD><TD><FONT STYLE="color: navy">Public-Private
                                            Partnership - PPP</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 16.05pt 0 0 41.5pt">The chart below shows expenses with Public-Private Partnerships
in 1Q24, compared to the figures reported in 1Q23:</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 8.45pt 16.45pt 0 0; text-align: right"><B><I>R$ thousand</I></B></P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0 0 0 13.15pt"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #95B3D7">
    <TD STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.8pt; padding-left: 0.75pt; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 9pt"><B>1Q24</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0 0 0 13.15pt"></P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 1.1pt 0 0 16.6pt"><B>S&Atilde;O LOUREN&Ccedil;O PRODUCTION SYSTEM</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 41%; border: black 1pt solid; padding-top: 1.15pt; padding-left: 3.45pt; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">General
    supplies</FONT></TD>
    <TD STYLE="width: 20%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.95pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">4,906.7</FONT></TD>
    <TD STYLE="width: 17%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.9pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">4,797.8</FONT></TD>
    <TD STYLE="width: 14%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">108.9</FONT></TD>
    <TD STYLE="width: 8%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3.1pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">2.3</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 1.1pt; padding-left: 3.45pt; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Services</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.1pt; padding-right: 2.95pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">10,353.4</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.1pt; padding-right: 2.95pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">10,123.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.1pt; padding-right: 3.1pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">229.7</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.1pt; padding-right: 3.2pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">2.3</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 1.15pt; padding-left: 3.45pt; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">General
    expenses</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">1,355.9</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.95pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">1,325.8</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3.05pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">30.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3.15pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">2.3</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 1.15pt; padding-left: 3.45pt; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Amortization</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.95pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">4,078.0</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.95pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">4,055.6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3.05pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">22.4</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3.1pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">0.6</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 1.15pt; padding-left: 3.45pt; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Interest</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.9pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">138,671.0</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.9pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">49,493.0</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">89,178.0</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3.1pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">180.2</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 1.15pt; padding-left: 3.45pt; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Monetary
    adjustment</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.95pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.85pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">32,314.0</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">(32,314.0)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3.1pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">(100.0)</FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #DCE6F1">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 1.55pt; padding-left: 3.45pt; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>Total</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 2.95pt; text-align: right; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>159,365.0</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 2.9pt; text-align: right; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>102,109.9</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 3pt; text-align: right; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>57,255.1</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 3.05pt; text-align: right; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>56.1</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 11pt Georgia, Times, Serif; margin: 1.5pt 0 0 265pt; text-indent: 265pt">&nbsp;</P>

<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 1.65pt 0 0 16.6pt"><B>ALTO TIET&Ecirc; PRODUCTION SYSTEM</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 41%; border: black 1pt solid; padding-top: 1.15pt; padding-left: 3.45pt; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Services</FONT></TD>
    <TD STYLE="width: 20%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.9pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">12,645.8</FONT></TD>
    <TD STYLE="width: 17%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.9pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">18,358.2</FONT></TD>
    <TD STYLE="width: 14%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">(5,712.4)</FONT></TD>
    <TD STYLE="width: 8%; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3.1pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">(31.1)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 1.15pt; padding-left: 3.45pt; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Amortization</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.95pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">42,474.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.9pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">42,474.5</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3.05pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">-</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 1.15pt; padding-left: 3.45pt; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Interest</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.9pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">(24,568.3)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 2.85pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">4,464.1</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">(29,032.4)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.15pt; padding-right: 3.05pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">(650.4)</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 2.85pt; padding-left: 3.45pt; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">Monetary
    adjustment</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.85pt; padding-right: 2.95pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">261.9</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.85pt; padding-right: 2.9pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">2,168.9</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.85pt; padding-right: 3.05pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">(1,907.0)</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 2.85pt; padding-right: 3.1pt; text-align: right; line-height: 88%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt">(87.9)</FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: #DCE6F1">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 1.55pt; padding-left: 3.45pt; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>Total</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 2.95pt; text-align: right; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>30,813.9</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 2.9pt; text-align: right; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>67,465.7</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 2.95pt; text-align: right; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>(36,651.8)</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 1.55pt; padding-right: 3pt; text-align: right; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>(54.3)</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: #B8CCE4">
    <TD STYLE="border: black 1pt solid; width: 41%; padding-top: 1.6pt; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>Total
    expenses with PPP</B></FONT></TD>
    <TD STYLE="text-align: right; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; width: 20%; padding-top: 1.6pt; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>190,178.9</B></FONT></TD>
    <TD STYLE="text-align: right; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; width: 17%; padding-top: 1.6pt; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>169,575.6</B></FONT></TD>
    <TD STYLE="text-align: right; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; width: 14%; padding-top: 1.6pt; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>20,603.3</B></FONT></TD>
    <TD STYLE="text-align: right; border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; width: 8%; padding-top: 1.6pt; line-height: 103%"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 10pt"><B>12.1</B></FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 33; Options: NewSection; Value: 31 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->31<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>1</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Operations</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Companhia de Saneamento B&aacute;sico do Estado de S&atilde;o
Paulo (SABESP or Company) is a mixed-capital company headquartered in the municipality of S&atilde;o Paulo, at Rua Costa Carvalho, 300,
CEP 05429-900, controlled by the S&atilde;o Paulo State. The Company is engaged in the provision of basic and environmental sanitation
services in the S&atilde;o Paulo State, and supplies treated water and sewage services on a wholesale basis.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">In addition to providing basic sanitation services in
the S&atilde;o Paulo State, SABESP may perform activities in other states and countries and can operate in drainage, urban cleaning,
solid waste handling and energy markets. SABESP aims to be a world reference in the provision of sanitation services, in a sustainable,
competitive, and innovative manner, with a focus on customers.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2024, the Company operated water and
sewage services in 376 municipalities of the S&atilde;o Paulo State, including the Municipality of Ol&iacute;mpia, which started being
operated by the Company on December 11, 2023, of which 351 of these municipalities have already signed contracts, according to Law 11,445/2007.
Most of these municipalities&rsquo; operations are based on 30-year concession, program, and service contracts, except for the municipalities
of Guarulhos, Mau&aacute;, Santo Andr&eacute;, S&atilde;o Bernardo do Campo, S&atilde;o Jo&atilde;o da Boa Vista, and Tejup&aacute;,
which have a 40-year term.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The table below shows a summary of the contractual situation
of the municipalities served:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 52%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 16%; padding-right: 5.4pt; padding-left: 5.4pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center"><B>March 31,</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center"><B>2024</B></P>
</DIV></TD>
    <TD STYLE="width: 16%; padding-right: 5.4pt; padding-left: 5.4pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center"><B>December 31,</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center"><B>2023</B></P>
</DIV></TD>
    <TD STYLE="width: 16%; padding-right: 5.4pt; padding-left: 5.4pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center"><B>March 31,</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center"><B>2023</B></P>
</DIV></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Municipalities that have already
    signed contracts:</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">351</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">351</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">351</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;&nbsp;Balance &ndash;
    intangible and contract assets</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">49,485,788</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">48,759,219</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">45,931,674</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;&nbsp;Percentage
    of intangible and contract assets</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">95.36%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">95.12%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">94.79%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.65pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Revenue from sanitation services
    (excluding construction revenue)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">5,384,173</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">20,510,427</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">4,678,421</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.65pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Percentage of revenue from
    sanitation services (excluding construction revenue)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">95.25%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">95.35%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">95.30%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.65pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Municipalities with expired
    contracts:</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;&nbsp;Balance &ndash;
    intangible and contract assets</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">11,429</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">11,309</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">11,443</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 7.1pt; line-height: 110%; text-indent: -7.1pt"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;&nbsp;Percentage
    of intangible and contract assets</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">0.02%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">0.02%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">0.02%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.65pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Revenue from sanitation services
    (excluding construction revenue)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">4,361</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">17,559</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3,822</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.65pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Percentage of revenue from
    sanitation services (excluding construction revenue)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">0.08%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">0.08%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">0.08%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Municipalities with concession
    agreements due by 2030:</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">23</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">23</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">23</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;&nbsp;Balance &ndash;
    intangible and contract assets</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,045,481</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,051,209</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,064,090</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;&nbsp;Percentage
    of intangible and contract assets</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2.02%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2.05%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2.20%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.65pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Revenue from sanitation services
    (excluding construction revenue)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">223,943</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">833,418</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">189,704</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.65pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Percentage of revenue from
    sanitation services (excluding construction revenue)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3.96%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3.87%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3.86%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Municipality of S&atilde;o
    Paulo:</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 8.65pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Percentage of intangible and
    contract assets</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">43.20%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">43.40%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">43.21%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 8.65pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Percentage of revenue from
    sanitation services (excluding construction revenue)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">43.56%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">44.95%</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">44.53%</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0">&nbsp;</P>


<!-- Field: Page; Sequence: 34 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->32<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company's shares have been listed on the Novo Mercado
segment of B3 under ticker SBSP3 since April 2002 and on the New York Stock Exchange (NYSE) as Level III American Depositary Receipts
(&ldquo;ADRs&rdquo;), under ticker SBS, since May 2002.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Since 2008, the Company has been setting up partnerships
with other companies, which resulted in the following companies: Sesamm, &Aacute;guas de Andradina, Saneaqua Mairinque, Aquapolo Ambiental,
&Aacute;guas de Castilho, Attend Ambiental, Paulista Geradora de Energia, Cantareira SP Energia, FOXX URE-BA Ambiental, and Infranext
Solu&ccedil;&otilde;es em Pavimenta&ccedil;&atilde;o. Although SABESP has no majority interest in the capital stock of these companies,
the shareholders&rsquo; agreements provide for the power of veto and casting votes on certain issues jointly with associates, indicating
the shared control in the management of these investees, except for Saneaqua Mairinque, which, as of August 2020, no longer has a shared
control.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 8pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.25in"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Symbol; font-size: 10pt">&#183;</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Privatization
                                            and Proposal of New Concession Agreements</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of September 18, 2023, the Board of the State Privatization
Program (CDPED) resolved to recommend that:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(i) &nbsp; the Investment Partnerships Secretariat
and the Environment, Infrastructure, and Logistics Secretariat take the necessary steps to submit the draft of the Company&rsquo;s privatization
law to the Governor&rsquo;s office; and</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(ii) &nbsp; SABESP, under article 5, II combined
with article 7, paragraph 2 and paragraph 4 of Law 9,361/96, starts the procedure for the selection and hiring of coordinating banks
and other services required for the future public offering.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of September 30, 2023, as provided for in paragraph
2 of article 14 of Federal Law 14,026/2020 (&ldquo;New Legal Sanitation Framework&rdquo;), the State of S&atilde;o Paulo send Official
Letters to the municipalities operated by the Company with proposals to change the conditions of the concession agreements in effect
(&ldquo;Communication&rdquo;).</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Communication highlights general aspects of the
proposal for a new concession agreement (&ldquo;New Agreement&rdquo;) aiming at replacing the existing agreements, under article 14 of
the New Legal Sanitation Framework, indicating that the following guidelines will be observed under the New Agreement to be executed
with these municipalities:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(a) the anticipation of achieving the universalization
goals established in the New Sanitation Framework for 2029, subject to any shorter deadlines contractually outlined;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(b) the extension of the concession agreement
for 2060;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(c) the obligation of SABESP to serve the
population residing in consolidated informal urban settlements and rural areas, covering the entire municipal territory; and</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(d) the detailing of investments to be made
in each municipality.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of December 11, 2023, State Law 17,853 was enacted.
It authorized the Executive Branch of the S&atilde;o Paulo State to promote privatization measures of Companhia de Saneamento B&aacute;sico
do Estado de S&atilde;o Paulo &ndash; SABESP. Among other aspects, as provided for in article 2, the model adopted for the privatization
of SABESP must observe the following guidelines:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(i) compliance with the universalization goals
of water supply and sewage services in all municipalities of the State served by the Company, considering the inclusion of rural areas
and consolidated informal urban centers, under Federal Law 14,026, of July 15, 2020;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(ii) anticipation, to December 31, 2029, of
the achievement of the universalization goals, subject to any shorter deadlines contractually agreed upon;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(iii) tariff reduction, preferably considering
the most vulnerable population;</P>


<!-- Field: Page; Sequence: 35 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->33<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(iv) provision for the creation of an annual
control to monitor compliance with the goals, with indications of investment requirements for the next few years;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(v) provision of quality services, aiming
at improving the quality of treated water and reducing its loss;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(vi) guarantee, in the contractual instruments
resulting from the privatization, to the employees listed in SABESP&rsquo;s permanent staff at the time of the publication of this law,
of stability, with the maintenance of their employment contract for 18 (eighteen) months from the date of effective completion of the
Company&rsquo;s privatization process.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of December 21, 2023, the Company concluded the selection
of financial institutions that will be the global coordinators of the financial institutions union responsible for structuring the Company&rsquo;s
potential follow-on. The selected Global Coordinators are i) BTG Pactual; ii) Bank of America; iii) CITI; and iv) UBS - BB.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of February 15, 2024, as reported by the Company
in a Material Fact, the S&atilde;o Paulo State opened a public consultation regarding the following documents:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(a) the draft of the Concession Agreement
to be executed between the Regional Unit of Drinking Water Supply and Sewage Services 1 (&quot;URAE-1&quot;) Southeast and SABESP, with
the indication of the involvement of the S&atilde;o Paulo State Utility Services Regulatory Agency, along with the specific technical
exhibits of the Municipalities comprising URAE-1, in addition to other contractual exhibits;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(b) the draft of the charter of URAE-1&rsquo;s
Decision-Making Board; and</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 7.1pt; text-align: justify">(c) the draft of the Regional Sanitation Plan,
under article 17 of Federal Law 11,445, of 2007.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The aforementioned Public Consultation on the privatization
of SABESP was concluded on March 15, 2024, with a significant number of suggestions submitted by the public. A total of 976 contributions
were received through the Internet, in addition to 135 oral statements made at the eight public hearings held by the S&atilde;o Paulo
State on the matter.</P>


<!-- Field: Page; Sequence: 36 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->34<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As informed by the Company in a Material Fact released
to its shareholders on April 30, 2024, the S&atilde;o Paulo State Government, through the Secretariat of Environment, Infrastructure,
and Logistics (SEMIL), together with the Investment Partnerships Secretariat (SPI), published the result of Public Consultation 01/2024/GS
regarding the documents made available within the scope of the Company's Privatization process.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">In this context, the S&atilde;o Paulo S&atilde;o Paulo
State Government submitted the final versions of the following documents to the municipalities comprising URAE1-Southeast: (a) Draft
of the Concession Agreement between URAE 1 - Southeast and the Company and respective exhibits; (b) Draft of the Charter of URAE 1 -
Southeast&rsquo;s Decision-Making Board; and (c) Draft of the Regional Basic Sanitation Plan under Article 17 of Federal Law 11,445/2007.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The next steps of the privatization process consist
of the approval and signing of said documents within the scope of URAE 1 - Southeast, followed by approval from the Board of the State
Privatization Program (CDPED) of the final conditions of the public offering.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Management expects that the funds raised with the improved
water security from the works carried out, the generation of operational cash, and credit lines available for investments, will be sufficient
to meet the Company&rsquo;s commitments and not compromise the necessary investments.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify"><B>Approvals</B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The quarterly information was approved by the Board
of Directors on May 09, 2024.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>2</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Basis
                                            of preparation and presentation of the quarterly information </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Presentation of the Quarterly Information</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The quarterly information as of March 31, 2024, was
prepared based on the provisions of CPC 21 (R1) &ndash; Interim Financial Information and the international standard IAS 34 &ndash; Interim
Financial Reporting, issued by the International Accounting Standards Board (IASB), applicable to the preparation of the Quarterly Information
Form &ndash; ITR, and is fairly presented consistent with the rules issued by the Brazilian Securities and Exchange Commission (CVM).
Accordingly, this Quarterly Information takes into consideration the Official Letter CVM/SNC/SEP 003 of April 28, 2011, which allows
the entities to present selected notes to the financial statements in cases of redundant information already disclosed in the Annual
Financial Statements. Therefore, the quarterly information as of March 31, 2024, does not include all the notes and reporting required
by the standards for the annual financial statements, and accordingly, shall be read jointly with the Annual Financial Statements as
of December 31, 2023, prepared under the International Financial Reporting Standards &ndash; IFRS, issued by the International Accounting
Standards Board &ndash; IASB, and according to the accounting practices adopted in Brazil, which observe the pronouncements issued by
the Brazilian Accounting Pronouncements Committee - CPC. Therefore, in this quarterly information, the notes below were either not presented
or are not as detailed as and/or have the same references as those in the annual financial statements (according to numerical references):</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt">i.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Summary
                                            of significant accounting policies (Note 3);</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt">ii.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Changes
                                            in accounting practices and disclosures (Note 4);</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt">iii.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Risk
                                            management &ndash; Financial instruments (Note 5.4);</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt">iv.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Key
                                            accounting estimates and judgments (Note 6);</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt">v.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Related-party
                                            balances and transactions (Note 11);</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt">vi.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Investments
                                            (Note 12);</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt">vii.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Intangible
                                            assets (Note 15);</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt">viii.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Borrowings
                                            and financing (Note 17);</FONT></TD></TR></TABLE>


<!-- Field: Page; Sequence: 37 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->35<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt">ix.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Deferred
                                            taxes and contributions (Note 19);</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt">x.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Provisions
                                            (Note 20);</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt">xi.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Pension
                                            plan obligations (Note 22);</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt">xii.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Equity
                                            (Note 24);</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt">xiii.</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Insurance
                                            (Note 27);</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">All material information related to the quarterly information,
and this information alone, is being disclosed and corresponds to the information used by the Company&rsquo;s Management in its administration.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The amounts disclosed in the Notes to the quarterly
information are in thousands of Brazilian reais, unless otherwise stated.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>3</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Summary
                                            of material information on accounting policies </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The significant accounting policy information used in
the preparation of the quarterly information as of March 31, 2024, are consistent with those used to prepare the Annual Financial Statements
for the year ended December 31, 2023, disclosed in Note 3 of such financial statements.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>4</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Risk
                                            management</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>4.1</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Financial
                                            Risk Management</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify"><B>Financial risk factors</B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company's activities are affected by the Brazilian
economic scenario, making it exposed to market risk (exchange rate and interest rate), credit risk, and liquidity risk. Financial risk
management is focused on the unpredictability of financial markets and seeks to minimize potential adverse effects on financial performance.</P>

<P STYLE="font: 9.5pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company has not utilized derivative instruments
in any of the reported periods.</P>

<P STYLE="font: 9.5pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Frutiger Light; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif"><B>(a)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif"><B>Market
                                            risk</B></FONT></TD></TR></TABLE>

<P STYLE="font: 9.5pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify"><B>Foreign currency risk</B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Foreign currency exposure implies market risks associated
with currency fluctuations, since the Company has foreign currency-denominated liabilities, arising from long-term funding, in development
institutions, at more attractive interest rates, in U.S. dollars and Yen.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The management of currency exposure considers several
current and projected economic factors, besides market conditions.</P>


<!-- Field: Page; Sequence: 38 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->36<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">This risk arises from the possibility that the Company
may incur losses due to exchange rate fluctuations that would impact liability balances of foreign currency-denominated borrowings and
financing and related financial expenses. The Company does not maintain hedge or swap contracts or any derivative financial instrument
to hedge against this risk.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Part of the financial debt, totaling R$ 2,671,887 as
of March 31, 2024 (R$ 2,785,853 as of December 31, 2023), is indexed to the U.S. dollar and Yen. The exposure to exchange risk is as
follows:</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="4" STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 48%; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 15%"><DIV STYLE="margin-right: 5.65pt; margin-left: 5.65pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>Foreign currency</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>(in thousands)</B></P>
</DIV></TD>
    <TD STYLE="white-space: nowrap; width: 11%"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>R$</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%"><DIV STYLE="margin-right: 5.65pt; margin-left: 5.65pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>Foreign currency</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>(in thousands)</B></P>
</DIV></TD>
    <TD STYLE="white-space: nowrap; width: 11%"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>R$</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Borrowings
    and financing &ndash; US$ </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">272,009</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,359,011</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">280,188</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,356,474</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Borrowings
    and financing &ndash; Yen</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">39,077,331</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,289,943</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">41,078,385</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,405,702</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Interest
    and charges from borrowings and financing &ndash; US$</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">20,264</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">15,510</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Interest
    and charges from borrowings and financing &ndash; Yen</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,669</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">8,167</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Total exposure</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2,671,887</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2,785,853</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Borrowing
    cost &ndash; US$</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(38,404)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(37,520)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Borrowing
    cost &ndash; Yen</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(2,391)</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(2,442)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Total foreign
    currency-denominated borrowings (Note 16)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 2.25pt double">2,631,092</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 5.65pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 2.25pt double">2,745,891</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The 4.2% decrease in the balance of the foreign currency-denominated
debt from March 31, 2024, compared to December 31, 2023, was mainly impacted by the depreciation of the Yen against the Brazilian real
and amortizations in the period. The table below shows the prices and exchange variations in the period:</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 11pt Georgia, Times, Serif; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 16%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 35%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD STYLE="width: 32%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD>
    <TD STYLE="width: 17%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Var.</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">US$</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">R$ 4.9962</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">R$ 4.8413</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%"><FONT STYLE="font-size: 9pt">3.2%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Yen</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">R$ 0.03301</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">R$ 0.03422</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%"><FONT STYLE="font-size: 9pt">-3.5%</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Borrowings and financing fell by R$&nbsp;6,335 from
January to March 2024 (a decrease of R$&nbsp;83,825 from January to March 2023), due to exchange rate changes. See Note 16 (ii). As of
March 31, 2024, if the Brazilian real had depreciated or appreciated by 10 percentage points, in addition to the impacts already mentioned
above, against the US dollar and Yen with all other variables held constant, the effects on the result before funding costs and taxes
on the three-month period ended March 31, 2024 would have been R$ 267,189 (R$ 266,878 for the three-month period ended March 31, 2023),
lower or higher.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The probable scenario below presents the effect on the
income statements for the next 12 months, considering the projected rates of the U.S. dollar and the Yen.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company understands that the scenario presented
is reasonable, given the instability of the Brazilian real against the U.S. dollar and the Yen.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<!-- Field: Page; Sequence: 39 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->37<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 77%; padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 23%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Probable scenario</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%"><FONT STYLE="font-size: 9pt">(*)</FONT></TD></TR>

<TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 78%; padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt"><B>Net currency
    exposure as of March 31, 2024 in US$ - Liabilities </B></FONT></TD>
    <TD STYLE="width: 22%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">272,009</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">US$ rate as of March 31, 2024</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">4.9962</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Exchange rate estimated according
    to the scenario</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: right; border-bottom: Black 0.5pt solid">4.9700</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Difference between the rates</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">0.0262</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Effect on net financial result
    R$ - (gain) </FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">7,127</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt"><B>Net currency exposure as
    of March 31, 2024 in Yen - Liabilities</B></FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">39,077,331</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Yen rate as of March 31, 2024</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">0.03301</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Exchange rate estimated according
    to the scenario</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: right; border-bottom: Black 0.5pt solid">0.03446</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Difference between the rates</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(0.00145)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Effect on the net financial
    result R$ - (loss) </FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: right; border-bottom: Black 0.5pt solid">(56,662)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total effect on the net financial
    result in R$ - (loss) </FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: right; border-bottom: Black 1.5pt double">(49,535)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR>
    <TD COLSPAN="2" STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">(*)
    For the probable scenario in U.S. dollars and Yen, the exchange rates estimated for March 31, 2025 were used, according to the Focus-BACEN
    and B3&rsquo;s Benchmark Rate report, of March 31, 2024, respectively.</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify"><B>Interest rate risk</B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">This risk arises from the possibility that the Company
could incur losses due to fluctuations in interest rates, increasing the financial expenses related to borrowings and financing.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company has not entered into any derivative contract
to hedge against this risk; however, it continually monitors market interest rates, to evaluate the possible need to replace its debt.</P>


<!-- Field: Page; Sequence: 40 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->38<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The table below provides the borrowings and financing
subject to different inflation adjustment indices:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 30%; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 36%"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="width: 34%"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">CDI
    (i)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">12,672,245</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">9,966,111</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">TR
    (ii)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,656,774</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,684,711</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">IPCA
    (iii)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2,927,406</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3,038,378</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">TJLP
    (iv)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,290,064</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,365,806</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">SOFR
    (v)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,359,011</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,356,473</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Interest
    and charges</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">399,957</P></TD>
    <TD><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">392,906</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Total
    </FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">20,305,457</P></TD>
    <TD><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">17,804,385</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(i) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CDI - (<I>Certificado
de Dep&oacute;sito Interbanc&aacute;rio</I>), an interbank deposit certificate</P>

<P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(ii) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TR &ndash;
Interest Benchmark Rate</P>

<P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(iii) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IPCA
- (<I>&Iacute;ndice Nacional de Pre&ccedil;os ao Consumidor Amplo</I>), a consumer price index</P>

<P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(iv) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TJLP -
(<I>Taxa de Juros a Longo Prazo</I>), a long-term interest rate index</P>

<P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(v) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SOFR -
<I>Secured Overnight Financing Rate</I></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Another risk to which the Company is exposed is the
mismatch of inflation adjustment indices of its debts with those of its service revenues. Tariff adjustments of services provided do
not necessarily follow the increases in the inflation indexes to adjust borrowings, financing and interest rates affecting indebtedness.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2024, if interest rates on borrowings
and financing had been 1 percentage point higher or lower with all other variables held constant, the effects on profit before taxes
for the three-month period ended March 31, 2024 would have been R$ 203,055 (R$ 163,164 for the three-month period ended March 31, 2023),
lower or higher, mainly as a result of lower or higher interest expense on floating rate borrowings and financing.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Frutiger Light; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif"><B>(b)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif"><B>Credit
                                            risk</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Credit risk is related to cash and cash equivalents,
financial investments, as well as credit exposures of customers, including accounts receivable, restricted cash, and accounts receivable
from related parties. Credit risk exposure to customers is mitigated by sales to a dispersed base.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The maximum exposure to credit risk as of March 31,
2024 is the carrying amount of instruments classified as cash and cash equivalents, financial investments, restricted cash, trade receivables,
and accounts receivable from related parties on the balance sheet date. See Notes 6, 7, 8, 9, and 10.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Regarding the financial assets held with financial institutions,
the credit quality was assessed by reference to external credit ratings (if available) or historical information about the bank&rsquo;s
default rates. For the credit quality of the banks, such as deposits and financial investments, the Company assesses the rating published
by three main international agencies (Fitch, Moody's and S&amp;P), as follows:</P>


<!-- Field: Page; Sequence: 41 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->39<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 37%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0; border-bottom: Black 0.5pt solid"><B>Banks</B></P></TD>
    <TD STYLE="width: 21%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Fitch</B></P></TD>
    <TD STYLE="width: 21%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Moody's</B></P></TD>
    <TD STYLE="width: 21%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Standard Poor's</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font-size: 9pt">Banco do Brasil S/A</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">AAA(bra)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">AAA.br</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">-</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font-size: 9pt">Banco Santander Brasil S/A</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">-</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">AAA.br</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">brAAA</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font-size: 9pt">Brazilian Federal Savings Bank</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">AAA(bra)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">AAA.br</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">brAAA</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font-size: 9pt">Banco Bradesco S/A</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">AAA(bra)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">AAA.br</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">brAAA</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font-size: 9pt">Banco Ita&uacute; Unibanco S/A</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">AAA(bra)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">AAA.br</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">-</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font-size: 9pt">Banco BV</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">-</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">AA.br</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">brAAA</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><FONT STYLE="font-size: 9pt">Banco BTG Pactual S/A</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">AAA(bra)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">AAA.br</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right"><FONT STYLE="font-size: 9pt">brAAA</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The rating assessment disclosed by Fitch for deposit
transactions and financial investments in local currency is as follows:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 52%; padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 24%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD STYLE="width: 24%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Cash and
    cash equivalents and financial investments</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">AAA(bra)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">5,857,583 </FONT></TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2,939,713 </FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Others
    (*)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">331,544</P></TD>
    <TD STYLE="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">324,546</P></TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">6,189,127</P></TD>
    <TD STYLE="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">3,264,259</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 52%; padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 24%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD STYLE="width: 24%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Cash and
    cash equivalents and financial investments</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">AAA(bra)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">5,859,198 </FONT></TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2,940,690 </FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Others
    (*)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">332,784</P></TD>
    <TD STYLE="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">324,546</P></TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">6,191,982</P></TD>
    <TD STYLE="vertical-align: bottom; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">3,265,236</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(*) As of March 31, 2024, this category includes R$
329,381 (R$ 322,241 as of December 31, 2023) referring to Banco BV, current accounts, and financial investments, which are not rated
by Fitch.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Frutiger Light; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif"><B>(c)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif"><B>Liquidity
                                            risk </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Liquidity is primarily reliant upon cash provided by
operating activities and borrowings and financing obtained in the local and international capital markets, as well as the payment of
debts. The management of this risk considers the assessment of its liquidity requirements to ensure it has sufficient cash to meet its
operating and capital expenditure requirements.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The funds held are invested in interest-bearing current
accounts, time deposits, and securities, with instruments with appropriate maturity or liquidity sufficient to provide margin as determined
by the projections mentioned above.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The table below shows the financial liabilities, by
maturity, including the installments of principal and future interest. For agreements with floating interest rates, the interest rates
used correspond to the base date of March 31, 2024.</P>


<!-- Field: Page; Sequence: 42 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->40<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="7" STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company </B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 37%; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 9%"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>2024</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 9%"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>2025</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 9%"><P STYLE="color: #243F60; font: italic 8pt/110% Georgia, Times, Serif; margin: 2pt 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-style: normal"><B>2026</B></FONT></P></TD>
    <TD STYLE="white-space: nowrap; width: 9%"><P STYLE="color: #243F60; font: italic 8pt/110% Georgia, Times, Serif; margin: 2pt 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-style: normal"><B>2027</B></FONT></P></TD>
    <TD STYLE="white-space: nowrap; width: 9%"><P STYLE="color: #243F60; font: italic 8pt/110% Georgia, Times, Serif; margin: 2pt 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-style: normal; color: Black"><B>2028</B></FONT></P></TD>
    <TD STYLE="width: 9%"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>2029 onwards</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 9%"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Total</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt"><B>As of March 31, 2024</B></FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding: 2pt 2.85pt 1pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding: 2pt 2.85pt 1pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding: 2pt 2.85pt 1pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding: 2pt 2.85pt 1pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Liabilities</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding: 2pt 2.85pt 1pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Borrowings and financing</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">3,051,567</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">3,773,001</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">3,368,294</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">3,278,126</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 2pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 8pt; font-style: normal; color: Black">2,418,568</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">13,595,562</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">29,485,118</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Trade payables and contractors</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">491,038</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 2pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 8pt; font-style: normal; color: Black">-</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">491,038</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Services payable</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">836,294</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 2pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 8pt; font-style: normal; color: Black">-</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">836,294</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Public-Private Partnership -
    PPP</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">432,216</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">446,524</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">461,438</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">476,850</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 2pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 8pt; font-style: normal; color: Black">492,777</FONT></TD>
    <TD STYLE="vertical-align: bottom; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">6,057,282</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">8,367,087</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Program Contract Commitments</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">20,310</P></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,232</P></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,232</P></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,232</P></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom"><P STYLE="color: #243F60; font: italic 8pt/110% Georgia, Times, Serif; margin: 2pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid"><FONT STYLE="font-style: normal; color: Black">1,232</FONT></P></TD>
    <TD STYLE="vertical-align: bottom"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">11,702</P></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">36,940</P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Total</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">4,831,425</P></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">4,220,757</P></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">3,830,964</P></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">3,756,208</P></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="color: #243F60; font: italic 8pt/110% Georgia, Times, Serif; margin: 2pt 0 1pt; text-align: right; border-bottom: Black 1.5pt double"><FONT STYLE="font-style: normal; color: Black">2,912,577</FONT></P></TD>
    <TD><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">19,664,546</P></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">39,216,477</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="7" STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="color: Black"><B>Consolidated</B></FONT></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 37%; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 9%"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="color: Black"><B>2024</B></FONT></P></TD>
    <TD STYLE="white-space: nowrap; width: 9%"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="color: Black"><B>2025</B></FONT></P></TD>
    <TD STYLE="white-space: nowrap; width: 9%"><P STYLE="color: #243F60; font: italic 8pt/110% Georgia, Times, Serif; margin: 2pt 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-style: normal; color: Black"><B>2026</B></FONT></P></TD>
    <TD STYLE="white-space: nowrap; width: 9%"><P STYLE="color: #243F60; font: italic 8pt/110% Georgia, Times, Serif; margin: 2pt 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-style: normal; color: Black"><B>2027</B></FONT></P></TD>
    <TD STYLE="white-space: nowrap; width: 9%"><P STYLE="color: #243F60; font: italic 8pt/110% Georgia, Times, Serif; margin: 2pt 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-style: normal; color: Black"><B>2028</B></FONT></P></TD>
    <TD STYLE="width: 9%"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="color: Black"><B>2029
                          onwards</B></FONT></P></TD>
    <TD STYLE="white-space: nowrap; width: 9%"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="color: Black"><B>Total</B></FONT></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt"><B>As of March 31, 2024</B></FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding: 2pt 2.85pt 1pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding: 2pt 2.85pt 1pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding: 2pt 2.85pt 1pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding: 2pt 2.85pt 1pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Liabilities</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding: 2pt 2.85pt 1pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="color: Black">&nbsp;</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Borrowings and financing</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">3,051,567</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">3,773,001</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">3,368,294</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">3,278,126</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 2pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 8pt; font-style: normal; color: Black">2,418,568</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">13,595,562</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">29,485,118</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Trade payables and contractors</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">490,494</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 2pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 8pt; font-style: normal; color: Black">-</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">490,494</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Services payable</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">838,703</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 2pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 8pt; font-style: normal; color: Black">-</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">838,703</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Public-Private Partnership -
    PPP</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">432,216</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">446,524</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">461,438</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">476,850</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 2pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; font-family: Cambria, Times, Serif; color: #243F60; font-style: italic; line-height: 110%"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 8pt; font-style: normal; color: Black">492,777</FONT></TD>
    <TD STYLE="vertical-align: bottom; padding-bottom: 1pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">6,057,282</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt; color: Black">8,367,087</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Program Contract Commitments</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid"><FONT STYLE="color: Black">20,310</FONT></P></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid"><FONT STYLE="color: Black">1,232</FONT></P></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid"><FONT STYLE="color: Black">1,232</FONT></P></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid"><FONT STYLE="color: Black">1,232</FONT></P></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom"><P STYLE="color: #243F60; font: italic 8pt/110% Georgia, Times, Serif; margin: 2pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid"><FONT STYLE="font-style: normal; color: Black">1,232</FONT></P></TD>
    <TD STYLE="vertical-align: bottom"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid"><FONT STYLE="color: Black">11,702</FONT></P></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid"><FONT STYLE="color: Black">36,940</FONT></P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Total</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double"><FONT STYLE="color: Black">4,833,290</FONT></P></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double"><FONT STYLE="color: Black">4,220,757</FONT></P></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double"><FONT STYLE="color: Black">3,830,964</FONT></P></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double"><FONT STYLE="color: Black">3,756,208</FONT></P></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="color: #243F60; font: italic 8pt/110% Georgia, Times, Serif; margin: 2pt 0 1pt; text-align: right; border-bottom: Black 1.5pt double"><FONT STYLE="font-style: normal; color: Black">2,912,577</FONT></P></TD>
    <TD><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double"><FONT STYLE="color: Black">19,664,546</FONT></P></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double"><FONT STYLE="color: Black">39,218,342</FONT></P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify"><I>Cross default</I></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company has borrowings and financing agreements
including cross-default clauses, i.e., the early maturity of any debt may imply the early maturity of these agreements. The indicators
are continuously monitored to avoid the execution of these clauses, and the most restrictive ones are shown in Note 16 (c).</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Frutiger Light; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif"><B>(d)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif"><B>Sensitivity
                                            analysis on interest rate risk</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The table below shows the sensitivity analysis of the
financial instruments, prepared under CPC 40 (R1). To evidence the balances of main financial assets and liabilities, calculated at a
rate projected for the twelve-month period after March 31, 2024, or until the final settlement of each contract, whichever occurs first,
considering a probable scenario.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The purpose of the sensitivity analysis is to measure
the impact of changes in the market on the financial instruments, considering constant all other variables. At the time of settlement,
the amounts may be different from those presented, due to the estimates used in the measurement.</P>


<!-- Field: Page; Sequence: 43 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->41<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD COLSPAN="3" STYLE="white-space: nowrap; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD COLSPAN="3" STYLE="white-space: nowrap; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 44%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; border-bottom: Black 0.5pt solid"><B>Indicators</B></P></TD>
    <TD STYLE="width: 28%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Exposure</B></P></TD>
    <TD STYLE="width: 28%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Probable
    scenario</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt"><B>Assets</B></FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">CDI</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">6,162,220</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">9.8500%(**)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Financial
    income</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">606,979</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt"><B>Liabilities</B></FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">CDI
    </FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(12,672,245)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">9.8500%(**)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Interest
    to be incurred</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(1,248,216)</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 8pt">&nbsp;</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-left: 5.4pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">CDI
    net exposure</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(6,510,025)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(641,237)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt"><B>Liabilities</B></FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">TR</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(1,656,774)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">0.0048%(**)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Expenses
    to be incurred </FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(80)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">IPCA</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(2,927,406)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3.4600%(*)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Expenses
    to be incurred </FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(101,288)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">TJLP</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(1,290,064)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">6.3800%(*)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Interest
    to be incurred</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(82,306)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">SOFR
    (***) </FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(1,359,011)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">5.0397%(***)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Interest
    to be incurred</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(68,490)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 8pt">&nbsp;</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-left: 5.4pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total
    expenses to be incurred, net</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(893,401)</P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD COLSPAN="3" STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">(*)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Source:
    BACEN and LCA as of March 31, 2024 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD COLSPAN="3" STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">(**)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Source:
    B3 of March 31, 2024</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD COLSPAN="3" STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">(***)&nbsp;&nbsp;&nbsp;Source:
    Bloomberg</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>4.2</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Capital
                                            management </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company&rsquo;s objectives when managing capital
are to ensure the Company&rsquo;s ability to continue increasing investments in infrastructure, provide returns for shareholders and
benefits for other stakeholders, and maintain an optimal capital structure to reduce the cost of capital.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Capital is monitored based on the leverage ratio, which
corresponds to net debt divided by total capital (shareholders and providers of capital). Net debt corresponds to total borrowings and
financing less cash and cash equivalents and financial investments. Total capital is calculated as total equity plus net debt, as shown
in the statement of financial position.</P>


<!-- Field: Page; Sequence: 44 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->42<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; text-align: justify">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 50%; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 25%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD STYLE="width: 25%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31, 2023</B></P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 2.85pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt"><B>&nbsp;</B></FONT></TD>
    <TD STYLE="vertical-align: top; padding-right: 2.85pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt"><B>&nbsp;</B></FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total borrowings and financing
    (Note 16)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">22,024,307</FONT></TD>
    <TD STYLE="padding-bottom: 2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">19,536,350</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify"><FONT STYLE="font-size: 9pt">(-) Cash and cash equivalents
    (Note 6)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(2,019,256)</FONT></TD>
    <TD STYLE="padding-bottom: 2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(838,338)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify"><FONT STYLE="font-size: 9pt">(-) Financial investments
    (Note 7)</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 0.5pt solid">(4,169,871)</P></TD>
    <TD><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 0.5pt solid">(2,425,921)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify"><FONT STYLE="font-size: 9pt">Net debt</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">15,835,180</FONT></TD>
    <TD STYLE="padding-bottom: 2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">16,272,091</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total equity</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 0.5pt solid">30,680,671</P></TD>
    <TD><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 0.5pt solid">29,857,376</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total (shareholders plus providers
    of capital)</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 0.5pt solid">46,515,851</P></TD>
    <TD><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 0.5pt solid">46,129,467</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify"><FONT STYLE="font-size: 9pt">Leverage ratio</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 1.5pt double">34%</P></TD>
    <TD><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 1.5pt double">35%</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; text-align: justify">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 50%; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 25%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD STYLE="width: 25%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31, 2023</B></P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 2.85pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt"><B>&nbsp;</B></FONT></TD>
    <TD STYLE="vertical-align: top; padding-right: 2.85pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt"><B>&nbsp;</B></FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total borrowings and financing
    (Note 16)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">22,024,307</FONT></TD>
    <TD STYLE="padding-bottom: 2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">19,536,350</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify"><FONT STYLE="font-size: 9pt">(-) Cash and cash equivalents
    (Note 6)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(2,019,391)</FONT></TD>
    <TD STYLE="padding-bottom: 2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(838,484)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify"><FONT STYLE="font-size: 9pt">(-) Financial investments
    (Note 7)</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 0.5pt solid">(4,172,591)</P></TD>
    <TD><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 0.5pt solid">(2,426,752)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify"><FONT STYLE="font-size: 9pt">Net debt</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">15,832,325</FONT></TD>
    <TD STYLE="padding-bottom: 2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">16,271,114</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total equity</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 0.5pt solid">30,680,671</P></TD>
    <TD><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 0.5pt solid">29,857,376</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total (shareholders plus providers
    of capital)</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 0.5pt solid">46,512,996</P></TD>
    <TD><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 0.5pt solid">46,128,490</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: justify"><FONT STYLE="font-size: 9pt">Leverage ratio</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 1.5pt double">34%</P></TD>
    <TD><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 1.5pt double">35%</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>4.3</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Fair
                                            value estimates</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company considers that balances from trade receivables
(current) and trade payables by carrying amount less impairment approximate their fair values, considering the short maturity. Long-term
trade receivables also approximate their fair values, as they are adjusted by inflation and/or will bear contractual interest rates over
time.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>4.4</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Financial
                                            instruments</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company did not have financial assets classified
as fair value through other comprehensive income and fair value through profit or loss. The financial instruments included in the amortized
cost category comprise cash and cash equivalents, financial investments, restricted cash, trade receivables, balances with related parties,
other assets and balances receivable from the Water National Agency (ANA), accounts payable to suppliers, borrowings and financing, services
payable, balances payable deriving from the Public-Private Partnership (PPP) and program contract commitments, which are non-derivative
financial assets and liabilities with fixed or determinable payments, not quoted in an active market, except for cash equivalents and
financial investments.</P>


<!-- Field: Page; Sequence: 45 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->43<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The estimated fair values of the financial instruments
were as follows:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Financial Assets</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="4" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 40%; padding-bottom: 1pt; text-align: center">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Carrying amount</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Fair value</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Carrying amount</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Fair value</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Cash and cash equivalents</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">2,019,256</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">2,019,256</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">838,338</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">838,338</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Financial investments</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">4,169,871</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">4,169,871</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">2,425,921</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">2,425,921</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Restricted cash</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">45,694</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">45,694</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">54,944</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">54,944</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Trade receivables</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,930,690</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,930,690</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,853,398</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,853,398</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;ANA </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">1,879</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">1,879</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">2,673</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">2,673</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Other assets </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">319,144</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">319,144</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">274,924</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">274,924</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="4" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 40%; padding-bottom: 1pt; text-align: center">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Carrying amount</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Fair value</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Carrying amount</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Fair value</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Cash and cash equivalents</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">2,019,391</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">2,019,391</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">838,484</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">838,484</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Financial investments</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">4,172,591</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">4,172,591</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">2,426,752</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">2,426,752</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Restricted cash</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">45,694</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">45,694</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">54,944</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">54,944</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Trade receivables</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,936,233</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,936,233</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,856,723</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,856,723</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;ANA </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">1,879</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">1,879</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">2,673</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">2,673</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Other assets </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">237,270</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">237,270</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">196,065</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">196,065</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Additionally, SABESP has financial assets receivable
from related parties, totaling R$ 1,198,932 as of March 31, 2024 (R$ 1,196,545 as of December 31, 2023), which were calculated under
the conditions negotiated between the related parties. The conditions and additional information related to these financial instruments
are disclosed in Note 10. Part of this balance, totaling R$ 1,081,079 (R$ 1,076,174 as of December 31, 2023), refers to reimbursement
of additional retirement and pension plan - G0, indexed by IPCA plus simple interest of 0.5% p.m. On the transaction date, this interest
rate approximated that of National Treasury Notes (NTN-b), with a term similar to the terms of related-party transactions.</P>


<!-- Field: Page; Sequence: 46 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->44<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Financial Liabilities</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="4" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 40%; padding-bottom: 1pt; text-align: center">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Carrying amount</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Fair value</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Carrying amount</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Fair value</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Borrowings and financing</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">22,024,307</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">22,444,692</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">19,536,350</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">19,950,055</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Trade payables and contractors</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">491,038</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">491,038</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">456,064</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">456,064</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Services payable</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">836,294</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">836,294</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">749,226</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">749,226</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Program Contract Commitment</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">33,035</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">33,035</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">34,016</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">34,016</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Public-Private Partnership
    - PPP</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,222,703</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,222,703</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,286,614</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,286,614</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="4" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 40%; padding-bottom: 1pt; text-align: center">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Carrying amount</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Fair value</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Carrying amount</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Fair value</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Borrowings and financing</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">22,024,307</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">22,444,692</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">19,536,350</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">19,950,055</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Trade payables and contractors</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">490,494</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">490,494</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">456,215</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">456,215</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Services payable</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">838,703</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">838,703</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">750,732</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">750,732</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Program Contract Commitment</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">33,035</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">33,035</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">34,016</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">34,016</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Public-Private Partnership
    - PPP</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,222,703</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,222,703</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,286,614</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">3,286,614</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The criteria adopted to obtain the fair values of borrowings
and financing, in preparing the quarterly information as of March 31, 2024, are consistent with those used in the preparation of the
Annual Financial Statements for the fiscal year ended December 31, 2023.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Financial instruments referring to financial investments
and borrowings and financing are classified as Level 2 in the fair value hierarchy.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Considering the nature of other financial instruments,
assets and liabilities, the balances recognized in the statement of financial position approximate the fair values, except for borrowings
and financing, considering the maturities close to the end of the reporting date of this quarterly information, comparison of contractual
interest rates with market rates in similar operations at the end of the reporting periods, their nature, and maturity terms.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>5</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Key
                                            accounting estimates and judgments</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The preparation of the quarterly information requires
Management to disclose judgments (except for those that involve estimates) that have a significant impact on the amounts recognized based
on experience and other factors deemed as relevant, which affect the values of assets and liabilities and present results that may differ
from the actual results.</P>


<!-- Field: Page; Sequence: 47 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->45<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company establishes estimates and assumptions regarding
the future, which are reviewed on a timely basis. Such accounting estimates, by definition, may differ from the actual results. The effects
arising from the reviews of the accounting estimates are recognized in the period in which the estimates are reviewed.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company assessed the main accounting policies that
involve judgments, except for those that involve estimates, and concluded that none of them have a significant effect.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The areas that require a higher level of judgment and
greater complexity, as well as assumptions and estimates that are significant for the quarterly information, are: (i) allowance for doubtful
accounts; (ii) intangible assets arising from concession agreements and program contracts; (iii) pension plan obligations; (iv) deferred
income tax and social contribution; (v) provisions; and (vi) unbilled revenue.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>6</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Cash
                                            and cash equivalents</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 42%; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 29%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD STYLE="width: 29%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt"><FONT STYLE="font-size: 9pt">Cash and banks</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">26,907</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">31,041</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt"><FONT STYLE="font-size: 9pt">Cash equivalents</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,992,349</P></TD>
    <TD><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">807,297</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">2,019,256</P></TD>
    <TD><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">838,338</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 42%; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 29%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD STYLE="width: 29%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt"><FONT STYLE="font-size: 9pt">Cash and banks</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">27,042</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">31,187</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt"><FONT STYLE="font-size: 9pt">Cash equivalents</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,992,349</P></TD>
    <TD><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">807,297</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">2,019,391</P></TD>
    <TD><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">838,484</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Cash and cash equivalents include cash, bank deposits,
and high-liquidity short-term financial investments, mainly represented by repurchase agreements, fund shares (accruing CDI interest
rates), and CDBs, whose original maturities or intention of realization are lower than three months, which are convertible into a cash
amount and subject to an insignificant risk of change in value.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2024, the average yield of cash equivalents
corresponded to 96.67% of CDI (96.25% as of December 31, 2023).</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>


<!-- Field: Page; Sequence: 48 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->46<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>7</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Financial
                                            investments</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company has financial investments in CDB, with daily
liquidity, which it does not intend to use in the next three months, as shown below:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 42%; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 29%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="width: 29%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Banco
    BV </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">329,380</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">322,240</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Banco
    Bradesco S/A </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">657,631</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">643,445</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Banco
    BTG Pactual S/A </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">459,170</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">449,241</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Banco
    do Brasil S/A </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,723,690</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,010,995</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">4,169,871</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">2,425,921</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 42%; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 29%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="width: 29%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Banco
    BV </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">329,380</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">322,240</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Banco
    Bradesco S/A </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">657,631</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">643,445</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Banco
    BTG Pactual S/A </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">459,170</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">449,241</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Banco
    do Brasil S/A </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,726,410</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,011,826</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">4,172,591</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">2,426,752</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">As of March 31, 2024, the average yield of the financial investments corresponded
to 103.3% of CDI (103.3% as of December 31, 2023).</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>8</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Restricted
                                            cash</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 46%; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 27%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 27%"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Agreement with the S&atilde;o
    Paulo Municipal Government (i)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">38,690</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">47,749</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Brazilian Federal Savings
    Bank &ndash; escrow deposits</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">442</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">365</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Other</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">6,562</P></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">6,830</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">45,694</P></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">54,944</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 6pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 19.85pt">(i)</TD><TD STYLE="text-align: justify">Refers to the amount deducted from the transfer
                                            of 7.5% of the revenue earned in the municipality to the Municipal Fund for Environmental
                                            Sanitation and Infrastructure, corresponding to eventual amounts unpaid by direct management
                                            bodies, foundations and government agencies, as established in the agreement entered into
                                            with S&atilde;o Paulo Municipal Government (PMSP).</TD></TR></TABLE>


<!-- Field: Page; Sequence: 49 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->47<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Frutiger Light; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>9</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Trade
                                            receivables </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><B>(a)</B></TD><TD STYLE="text-align: justify"><B>Statement of financial position
                                            details</B></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify; text-indent: -20.65pt"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 46%; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 27%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="width: 27%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Private sector:</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">General (i) and special customers
    (ii)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2,684,286 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2,199,475 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Agreements (iii)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">177,638</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">839,010</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,861,924</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">3,038,485</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Government entities:</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Municipal</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">598,456 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">623,434 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Federal</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">9,937 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">8,036 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Agreements (iii)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">658,021</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">374,372</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,266,414</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,005,842</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Wholesale customers &ndash;
    Municipal governments: (iv)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Mogi das Cruzes</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">4,134 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">4,343 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">S&atilde;o Caetano do Sul</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">8,109 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">45,333 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">S&atilde;o Caetano do Sul
    Agreement</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">76,502</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total wholesale customers
    &ndash; Municipal governments</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">88,745</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">49,676</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Unbilled supply</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,090,469</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,136,604</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Subtotal</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">5,307,552 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">5,230,607 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Allowance for doubtful accounts</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,376,862)</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,377,209)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total </FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">3,930,690</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">3,853,398</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Current</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3,584,889 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3,580,962 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Noncurrent</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">345,801</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">272,436</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">3,930,690</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">3,853,398</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>


<!-- Field: Page; Sequence: 50 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->48<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 46%; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 27%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="width: 27%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Private sector:</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">General (i) and special customers
    (ii)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2,687,984 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2,200,921 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Agreements (iii)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">177,638</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">839,010</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,865,622</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">3,039,931</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Government entities:</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Municipal</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">598,602 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">623,601 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Federal</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">9,938 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">8,036 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Agreements (iii)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">658,021</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">374,372</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,266,561</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,006,009</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Wholesale customers &ndash;
    Municipal governments: (iv)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Mogi das Cruzes</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">4,134 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">4,343 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">S&atilde;o Caetano do Sul</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">8,109 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">45,333 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">S&atilde;o Caetano do Sul
    Agreement</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">76,502</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total wholesale customers
    &ndash; Municipal governments</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">88,745</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">49,676</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Unbilled supply</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,092,167</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,138,316</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Subtotal</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">5,313,095 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">5,233,932 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Allowance for doubtful accounts</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,376,862)</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,377,209)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total </FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">3,936,233</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">3,856,723</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Current</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3,590,432 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3,584,287 </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Noncurrent</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">345,801</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">272,436</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">3,936,233</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">3,856,723</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 10pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 28.35pt">(i)</TD><TD STYLE="text-align: justify">General customers - residential and small
                                            and mid-sized companies;</TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 10pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 28.35pt">(ii)</TD><TD STYLE="text-align: justify">Special customers &ndash; large consumers,
                                            commercial industries, condominiums and special billing customers (fixed demand agreements,
                                            industrial waste, wells, among others);</TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 10pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 28.35pt">(iii)</TD><TD STYLE="text-align: justify">Agreements - installment payments of past-due
                                            receivables, plus inflation adjustment and interest, according to the agreements; and</TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 28.35pt">(iv)</TD><TD STYLE="text-align: justify">Wholesale basis customers - municipal governments.
                                            This balance refers to the sale of treated water to municipalities, which are responsible
                                            for distributing to, billing, and charging final customers.</TD></TR></TABLE>


<!-- Field: Page; Sequence: 51 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->49<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><B>(b)</B></TD><TD STYLE="text-align: justify"><B>The aging of trade receivables
                                            is as follows:</B></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 44%; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 28%"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="width: 28%"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Current</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2,849,440</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2,635,280</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Past-due:</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Up to 30
    days</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">572,195</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">627,472</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">From 31
    to 60 days</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">265,334</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">271,476</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">From 61
    to 90 days</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">189,486</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">181,639</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">From 91
    to 120 days</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">142,824</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">127,421</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">From 121
    to 180 days</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">304,359</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">290,610</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">From 181
    to 360 days</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">179,209</FONT></TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">57,289</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Over 360
    days</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">804,705</P></TD>
    <TD><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,039,420</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; font-family: Times New Roman, Times, Serif; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; font-family: Times New Roman, Times, Serif; text-align: justify; line-height: 110%"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">Total
    past-due</FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,458,112</P></TD>
    <TD><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,595,327</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Total </FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">5,307,552</P></TD>
    <TD><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">5,230,607</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 44%; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 28%"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="width: 28%"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Current</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2,852,858</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2,723,975</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Past-due:</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Up to 30
    days</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">573,435</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">627,986</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">From 31
    to 60 days</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">265,847</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">271,476</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">From 61
    to 90 days</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">189,807</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">181,639</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">From 91
    to 120 days</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">142,875</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">127,421</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">From 121
    to 180 days</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">304,359</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">290,610</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">From 181
    to 360 days</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">179,209</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">57,289</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Over 360
    days</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">804,705</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">953,536</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; font-family: Times New Roman, Times, Serif; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; font-family: Times New Roman, Times, Serif; text-align: justify; line-height: 110%"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">Total
    past-due</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,460,237</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,509,957</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Total </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">5,313,095</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">5,233,932</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>


<!-- Field: Page; Sequence: 52 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->50<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><B>(c)</B></TD><TD STYLE="text-align: justify"><B>Allowance for doubtful accounts
                                            </B></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 56%; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 22%"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company and Consolidated</B></P></TD>
    <TD STYLE="width: 22%"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt"><B>Changes
    in assets</B></FONT></TD>
    <TD STYLE="white-space: nowrap"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>January
    to March 2024</B></P></TD>
    <TD><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>January
    to March 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Balance
    at the beginning of the period</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,377,209</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,428,517</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Creation/(reversal)
    of losses</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">40,097</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(8,449)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Recoveries </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(40,444)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(19,627)</P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Balance
    at the end of the period</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,376,862</P></TD>
    <TD STYLE="padding-right: 2.85pt; vertical-align: bottom; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,400,441</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 11pt Georgia, Times, Serif; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 56%; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 22%"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD>
    <TD STYLE="width: 22%"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; line-height: 110%"><FONT STYLE="font-size: 9pt"><B>Reconciliation of estimated/historical losses
    at the result</B></FONT></TD>
    <TD><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>January to March
    2024</B></P></TD>
    <TD><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>January to March
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Write-offs</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(190,285)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(190,138)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">(Losses)/reversal with state
    entities &ndash; related parties </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(580)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(743)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">(Losses)/reversal with the private
    sector/government entities</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(40,097)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">8,449</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Recoveries</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">40,444</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">19,627</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Amount recorded as expense (Note
    27)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(190,518)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(162,805)</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company does not have customers individually representing
10% or more of its total revenues.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><B>(d)</B></TD><TD STYLE="text-align: justify"><B>Registered warrants</B></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company has registered warrants issued as a result
of final and unappealable lawsuits for the collection of unpaid water and sewage bills from public entities. These bills are considered
allowance for doubtful accounts ('PECLD') in their entirety, and the updated values of said bills, calculated according to the respective
registered warrants, are not recognized due to uncertainties regarding their realization.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2024, the Company has registered warrants
issued in its favor, currently totaling R$ 3,232,377 (R$ 3,085,265 as of December 31, 2023), which, as mentioned above, are fully provisioned
at their original value and do not have their respective updates recognized in the quarterly information.</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The reversal of the PECLD for the original bills and
their update are recognized when uncertainties regarding their realization are mitigated, i.e. when the realization value becomes determinable
due to the predictability of the commencement of its receipt or when negotiated with third parties.</P>


<!-- Field: Page; Sequence: 53 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->51<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company did not negotiate its registered warrants
in the current period or in the comparative year and period, and there are no ongoing negotiations, as follows:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; background-color: white; border-collapse: collapse">
  <TR>
    <TD STYLE="padding-right: 5.65pt; padding-left: 3.5pt; text-align: center; line-height: 12.1pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/12.1pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD></TR>
  <TR>
    <TD STYLE="width: 50%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/12.1pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Debtor</B></P></TD>
    <TD STYLE="width: 25%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/12.1pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 25%; padding-left: 2.85pt"><P STYLE="font: 9pt/12.1pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.65pt; padding-left: 3.5pt; line-height: 12.1pt"><FONT STYLE="font-size: 9pt">Municipality of S&atilde;o
    Paulo</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt; text-align: right; line-height: 12.1pt"><FONT STYLE="font-size: 9pt">3,139,801</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; text-align: right; line-height: 12.1pt"><FONT STYLE="font-size: 9pt">3,042,927</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.65pt; padding-left: 3.5pt; line-height: 12.1pt"><FONT STYLE="font-size: 9pt">S&atilde;o Paulo State Government</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt; text-align: right; line-height: 12.1pt"><FONT STYLE="font-size: 9pt">41,359</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; text-align: right; line-height: 12.1pt"><FONT STYLE="font-size: 9pt">-</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.65pt; padding-left: 3.5pt; line-height: 12.1pt"><FONT STYLE="font-size: 9pt">Municipality of Cachoeira
    Paulista</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt; text-align: right; line-height: 12.1pt"><FONT STYLE="font-size: 9pt">15,871</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; text-align: right; line-height: 12.1pt"><FONT STYLE="font-size: 9pt">15,456</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.65pt; padding-left: 3.5pt; line-height: 12.1pt"><FONT STYLE="font-size: 9pt">Municipality of Agudos</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt; text-align: right; line-height: 12.1pt"><FONT STYLE="font-size: 9pt">13,061</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; text-align: right; line-height: 12.1pt"><FONT STYLE="font-size: 9pt">14,964</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.65pt; padding-left: 3.5pt; line-height: 12.1pt"><FONT STYLE="font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/12.1pt Georgia, Times, Serif; margin: 0; text-align: right; border-bottom: Black 0.5pt solid">22,285</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/12.1pt Georgia, Times, Serif; margin: 0; text-align: right; border-bottom: Black 0.5pt solid">11,918</P></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.65pt; padding-left: 3.5pt; line-height: 12.1pt"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/12.1pt Georgia, Times, Serif; margin: 0; text-align: right; border-bottom: Black 1.5pt double">3,232,377</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/12.1pt Georgia, Times, Serif; margin: 0; text-align: right; border-bottom: Black 1.5pt double">3,085,265</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Additionally, the Company negotiated registered warrants
for overdue bills with the municipalities of Guarulhos, Santo Andr&eacute;, and Mau&aacute; in previous fiscal years, which are currently
suspended as they serve as collateral for the fulfillment of contracts entered into with the municipalities.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of May 09, 2024, the Board of Directors approved
the adherence to the notice for agreement 1/2024 from the S&atilde;o Paulo Municipal Government (PMSP), whose adherence deadline ends
on June 30, 2024. The objective of said Notice is the presentation of direct agreement proposals by holders of registered warrants.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">For the adherence to be effective, approval by the Registered
Warrants Conciliation Chamber of the Municipal Attorney General Office (PGM) and other subsequent procedures according to the Notice
are required, the accuracies of which are still considered uncertain. SABESP may withdraw the proposal at any time, provided it is before
the payment made by the Board of Registered Warrants Executions and Calculations of the S&atilde;o Paulo State Court of Justice (Depre),
as provided in the Notice.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company does not expect changes in the recognition
method of the municipality of S&atilde;o Paulo's registered warrants until such adherence becomes effective.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>


<!-- Field: Page; Sequence: 54 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->52<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>10</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Related-party
                                            balances and transactions</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(a)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>S&atilde;o
                                            Paulo State</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 64.4pt"><FONT STYLE="font-size: 10pt"><B>(i)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Accounts
                                            receivable, interest on capital, revenue, and expenses </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 52%; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 24%; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 24%; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Accounts receivable</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Current:</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Sanitation services </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">167,570</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">169,508</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 10pt Verdana, Helvetica, Sans-Serif; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">&#9;Allowance
    for losses </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(51,078)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(50,498)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 10pt Verdana, Helvetica, Sans-Serif; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">&#9;Reimbursement
    of additional retirement and pension benefits paid (G0):</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;-
    Monthly flow</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">41,929</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">36,241</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;-
    GESP Agreement &ndash; 2015 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">108,203</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">106,022</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total current</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">266,624</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">261,273</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Noncurrent:</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Agreement for the installment
    payment of sanitation services</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">1,361</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">1,361</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Reimbursement of additional
    retirement and pension benefits paid (G0):</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&#9;<FONT STYLE="font-size: 9pt">&#9;- GESP Agreement &ndash;
    2015 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">930,947</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">933,911</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total noncurrent</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">932,308</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">935,272</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total receivables </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,198,932</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,196,545</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Assets:</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Sanitation services</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">117,853</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">120,371</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Reimbursement of additional
    retirement and pension benefits paid (G0)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,081,079</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,076,174</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,198,932</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,196,545</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Liabilities:</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Interest on capital payable
    </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">420,564</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">420,564</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>


<!-- Field: Page; Sequence: 55 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->53<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 52%; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 24%; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 24%; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Accounts receivable</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Current:</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Sanitation services </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">167,608</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">169,515</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 10pt Verdana, Helvetica, Sans-Serif; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">&#9;Allowance
    for losses </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(51,078)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(50,498)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 10pt Verdana, Helvetica, Sans-Serif; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">&#9;Reimbursement
    of additional retirement and pension benefits paid (G0):</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;-
    Monthly flow </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">41,929</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">36,241</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;-
    GESP Agreement &ndash; 2015 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">108,203</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">106,022</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total current</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">266,662</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">261,280</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Noncurrent:</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Agreement for the installment
    payment of sanitation services</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">1,361</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">1,361</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Reimbursement of additional
    retirement and pension benefits paid (G0):</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&#9;<FONT STYLE="font-size: 9pt">&#9;- GESP Agreement &ndash;
    2015 </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">930,947</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">933,911</P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total noncurrent</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">932,308</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">935,272</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total receivables </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,198,970</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,196,552</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Assets:</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Sanitation services</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">117,891</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">120,378</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Reimbursement of additional
    retirement and pension benefits paid (G0)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,081,079</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,076,174</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,198,970</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,196,552</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Liabilities:</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Interest on capital payable
    </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">420,564</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">420,564</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD>
    <TD><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 46%; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 18%"><DIV STYLE="margin-right: 2.85pt; margin-left: 0in; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD>
    <TD STYLE="width: 18%"><DIV STYLE="margin-right: 2.85pt; margin-left: 0in; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2023</B></P>
</DIV></TD>
    <TD STYLE="width: 18%"><DIV STYLE="margin-right: 2.85pt; margin-left: 0in; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Revenue
    from sanitation services</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 9pt">186,115</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 9pt">162,966</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 9pt">186,144</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Payments from related parties</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 9pt">(186,205)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 9pt">(167,612)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 9pt">(186,205)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 10pt Verdana, Helvetica, Sans-Serif; padding-bottom: 1pt; padding-left: 14.2pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 10pt Verdana, Helvetica, Sans-Serif; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">Payment
    received from reimbursement referring to Law 4,819/1958</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 9pt">(47,816)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 9pt">(52,593)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 9pt">(47,816)</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>


<!-- Field: Page; Sequence: 56 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->54<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 64.4pt"><FONT STYLE="font-size: 10pt"><B>(ii)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Disputed
                                            amounts</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2024 and December 31, 2023, the disputed
amounts between SABESP and the S&atilde;o Paulo State, referring to additional retirement and pension benefits paid (Law 4,819/1958),
totaled R$&nbsp;1,605,832 and R$&nbsp;1,583,449, respectively, for which allowances for doubtful accounts were created for the total
amount.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 64.4pt"><FONT STYLE="font-size: 10pt"><B>(iii)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Actuarial
                                            Liability</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company recognized an actuarial liability corresponding
to additional retirement and pension benefits paid to employees, retired employees, and pensioners of the G0 Plan. As of Marcy 31, 2024
and December 31, 2023, the amounts corresponding to such actuarial liability were R$&nbsp;2,095,517 and R$&nbsp;2,098,622, respectively.
For detailed information on additional retirement and pension benefits, see Note 21.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(b)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Use
                                            of Reservoirs &ndash; EMAE</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Empresa Metropolitana de &Aacute;guas e Energia S.A.
(EMAE) planned to receive the credit and obtain financial compensation for alleged past and future losses in electricity generation arising
from water collection, and compensation for costs already incurred and to be incurred with the operation, maintenance, and inspection
of the Guarapiranga and Billings reservoirs used by SABESP in its operations.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of October 28, 2016, the Company entered into an
agreement based on a Private Transaction Agreement and Other Covenants to fully and completely settle the disputes and SABESP will continue
using the reservoirs.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2024, the balance of the agreement totaled
R$ 9,197 and R$ 103,572 (R$ 8,876 and R$ 99,279 as of December 31, 2023), recorded in Other liabilities, under current and noncurrent
liabilities, respectively.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(c)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Agreements
                                            with reduced tariffs for State Entities that join the Rational Water Use Program (PURA) </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company has agreements with government entities
related to the S&atilde;o Paulo State Government that benefit them with a 25% discount on water supply and sewage services tariffs when
they are not in default. These agreements provide for the implementation of the rational water use program, which provides for water
consumption reduction.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(d)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Guarantees</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The S&atilde;o Paulo State provides guarantees for some
of the Company&rsquo;s borrowings and financing and does not charge any related fees. See Note 16.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(e)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Personnel
                                            assignment agreement among entities related to the S&atilde;o Paulo State Government</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company has personnel assignment agreements with
entities related to the State Government, whose expenses are fully charged.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">From January to March 2024, expenses with employees
assigned to other state entities totaled R$&nbsp;3,518 (R$&nbsp;672 from January to March 2023).</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">No expenses with employees from other entities assigned
to the Company were recorded from January to March 2024 and in the same period in 2023.</P>


<!-- Field: Page; Sequence: 57 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->55<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(f)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Non-operating
                                            assets</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2024 and December 31, 2023, the Company&rsquo;s
land and lent structures totaled R$ 3,613.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(g)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>SABESPREV
                                            </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company sponsors a defined benefit plan (G1 Plan),
which is operated and administered by SABESPREV. The net actuarial liability recognized until March 31, 2024, totaled R$ 35,713 (R$ 44,249
as of December 31, 2023). See Note 21.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(h)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Compensation
                                            of the Fiscal Council and Management </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">From January to March 2024, expenses related to the
compensation of the members of the Fiscal Council appointed by the controlling shareholder and Management members totaled R$&nbsp;2,470
(R$ 1,658 from January to March 2023).</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">From January to March 2024, additional amounts of R$&nbsp;540,
referring to the executive officers&rsquo; bonus, were recorded (R$ 285 from January to March 2023).</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(i)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Loan
                                            agreement through credit facility</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company holds interest in certain Special Purpose
Entities (SPEs), in which it does not hold the majority interest but has cast vote and power of veto in some matters but cannot use such
power of veto in a way to affect the returns of its investments. Therefore, these SPEs are considered for accounting purposes as joint
arrangements.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify"><B>&Aacute;guas de Andradina</B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company entered into a loan agreement through a
credit facility with SPE &Aacute;guas de Andradina S/A to finance the operations of that company.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2024, the balance of principal and interest
of this agreement totaled R$ 812 and R$ 2,814, which was recorded in &ldquo;Other assets&rdquo; under current and noncurrent assets (R$
694 and R$ 2,814, respectively, as of December 31, 2023), at CDI + 3% p.a.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">This agreement was executed on August 17, 2021. The
amount of principal, adjustment, accrued interest, and any other taxes must be paid in full by August 31, 2025.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify"><B>Sabesp Ol&iacute;mpia</B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company formalized a loan agreement through a credit
facility with Sabesp Ol&iacute;mpia S/A, making available the necessary funds for the payment of the first installment of the Fixed Concession
Fee to the Municipality of Est&acirc;ncia Tur&iacute;stica de Ol&iacute;mpia, which was a prerequisite for the signing of the water and
sewage concession agreement.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2024, the balance of principal and interest
of this agreement totaled R$ 81,059, which was recorded in &ldquo;Other assets&rdquo; under noncurrent assets, at CDI + 2% p.a.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">This agreement was executed on September 26, 2023. The
principal and the accumulated interest on the principal must be fully repaid by September 2040.</P>


<!-- Field: Page; Sequence: 58 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->56<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(j)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>FEHIDRO</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company has financing agreements under the State
Fund for Water Resources (FEHIDRO). These funds will be aimed at the execution of works and sewage services. As of March 31, 2024, the
balance of these financings totaled R$ 1,136 (R$ 1,278 as of December 31, 2023).</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>11</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Investments</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company holds interests in certain Special Purpose
Entities (SPE). Although SABESP has no majority shares of its investees, the shareholders&rsquo; agreement provides for the power of
veto in certain management matters, however, it cannot use such power of veto in a way to affect the returns over the investments, implying
a mutually shared control (joint venture &ndash; CPC 19 (R2)), except when SABESP Ol&iacute;mpia, in which the Company holds a stake
of 100% and meets the control requirements, consolidated this SPE, according to the Accounting Policy described in Note 2023 to the Annual
Financial Statements as of December 31, 2023.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company holds equity interest valued by the equity
accounting in the following investees:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0.2pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Equity</B></P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0.2pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Contribution</B></P></TD>
    <TD COLSPAN="3" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0.2pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Profit
    (loss) for the period</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 34%; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0.2pt 0; text-align: center"><B>March 31,</B></P>
    <P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0.2pt 0; text-align: center"><B>2024</B></P>
</DIV></TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0.2pt 0; text-align: center"><B>December 31,</B></P>
    <P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0.2pt 0; text-align: center"><B>2023</B></P>
</DIV></TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0.2pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>January
    to March 2024</B></P></TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0.2pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>January
    to March 2024</B></P></TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0.2pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>(*)</B></P></TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0.2pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>January
    to March 2023</B></P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-top: 0.2pt; padding-bottom: 0.2pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-top: 0.2pt; padding-bottom: 0.2pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Sesamm</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">65,511</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">61,275</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">4,236</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">4,630</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; line-height: 110%"><FONT STYLE="font-size: 8pt">&Aacute;guas
    de Andradina</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">35,582</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">34,088</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,494</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">389</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; line-height: 110%"><FONT STYLE="font-size: 8pt">&Aacute;guas
    de Castilho</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">13,384</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">12,784</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">600</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">402</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Attend
    Ambiental</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">47,823</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">43,263</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">4,560</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">4,016</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Aquapolo
    Ambiental</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">112,297</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">102,442</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">9,855</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">8,610</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Paulista
    Geradora de Energia - PGE (**)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">42,917</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">42,307</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">590</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">20</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(28)</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Cantareira
    SP Energia</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">10,711</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">10,650</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">61</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(258)</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; line-height: 110%"><FONT STYLE="font-size: 8pt">FOXX
    URE-BA Ambiental</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">62,430</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">63,309</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(295)</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(584)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(6,549)</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Infranext
    Solu&ccedil;&otilde;es em Pavimenta&ccedil;&atilde;o (***)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">4,699</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">4,699</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(340)</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; line-height: 110%"><FONT STYLE="font-size: 8pt">Sabesp
    Ol&iacute;mpia</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(3,121)</FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(3,066)</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(55)</FONT></TD>
    <TD STYLE="padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-top: 0.2pt; padding-bottom: 0.2pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(*) The amount presented refers to changes in the equity
of the investee, as its financial statements for the year ended December 31, 2023 were issued after the disclosure of SABESP&rsquo;s
financial statements.</P>


<!-- Field: Page; Sequence: 59 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->57<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(**) In 2023, a contribution of R$ 20,600 was defined,
with Servtec and Tecniplan paying R$ 14,860 of this amount in the same year. In 2024, Servtec and Tecniplan paid the remaining amount
of R$&nbsp;590, with the total paid-in amount corresponding to a 75% equity interest. As of March 31, 2024, SABESP had an outstanding
payable amount of R$&nbsp;5,150.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(****) Infranext&rsquo;s share capital will be R$&nbsp;12,000.
As of December 31, 2023, SABESP had an outstanding payable amount of R$ 4,950. The information presented refers to the position as of
December 31, 2023, the last balance sheet received.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD COLSPAN="8" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Investments</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Reclassification
    (***)</B></P></TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Equity results of
    investments</B></P></TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Interest percentage</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 35%; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="width: 8%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="width: 8%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD>
    <TD STYLE="width: 9%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 11pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 8pt"><B>January
    to March </B></FONT><B><FONT STYLE="font-size: 7.5pt">2024</FONT></B></P></TD>
    <TD STYLE="width: 8%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 11pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 8pt"><B>January
    to March </B></FONT><B><FONT STYLE="font-size: 7.5pt">2024</FONT></B></P></TD>
    <TD STYLE="width: 5%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>(*)</B></P></TD>
    <TD STYLE="width: 9%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 11pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><FONT STYLE="font-size: 8pt"><B>January
    to March </B></FONT><B><FONT STYLE="font-size: 7.5pt">2023</FONT></B></P></TD>
    <TD STYLE="width: 8%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="width: 10%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Sesamm</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">23,584</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">22,059</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">1,525</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">1,667</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">36%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">36%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">&Aacute;guas de Andradina</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">10,673</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">10,225</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">448</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">116</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">30%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">30%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">&Aacute;guas de Castilho</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">4,015</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">3,835</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">180</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">121</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">30%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">30%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Attend Ambiental</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">21,521</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">19,469</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">2,052</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">1,807</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">45%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">45%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Aquapolo Ambiental</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">55,025</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">50,196</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">4,829</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">4,219</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">49%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">49%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Paulista Geradora de Energia</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">6,866</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">6,861</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">5</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(7)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">25%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">25%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Cantareira SP Energia</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">5,242</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">5,212</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">30</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(126)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">49%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">49%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">FOXX URE-BA Ambiental</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">12,486</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">12,663</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(60)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(117)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(1,310)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">20%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">20%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Infranext Solu&ccedil;&otilde;es
    em Pavimenta&ccedil;&atilde;o</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(153)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">45%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">45%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Sabesp Ol&iacute;mpia</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">55</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(55)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">100%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center"><FONT STYLE="font-size: 8pt">100%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Total</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">139,412</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">130,520</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">55</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">8,954</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(117)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">6,334</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: center">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 2.4pt 0 1pt">&nbsp;</P>
    <P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 2.4pt 0 1pt">FOXX URE-BA Ambiental &ndash; Fair value (**)</P></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">25,018</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 7.5pt">25,244</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Other investments</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">6,099</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">6,099</P></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt">&nbsp;</P>
    <P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt">Overall total</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 2.25pt double">170,529</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 2.25pt double">161,863</P></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(*) The amount presented refers to changes in the equity
of the investee, as its financial statements for the year ended December 31, 2023 were issued after the disclosure of SABESP&rsquo;s
financial statements.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(**) The amount presented refers to the fair value adjustment
in the acquisition of FOXX URE-BA in 2024.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(***) The amount of the investee&rsquo;s loss exceeding
the investment was reclassified to Noncurrent Liabilities.</P>


<!-- Field: Page; Sequence: 60 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->58<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD COLSPAN="6" STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Investments</B></P></TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Equity results of
    investments</B></P></TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Interest percentage</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 34%; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 11%; padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center"><B>March </B></P>
    <P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center"><B>31, </B></P>
    <P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center"><B>2024</B></P>
</DIV></TD>
    <TD STYLE="white-space: nowrap; width: 11%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 11%; padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 0; text-align: center"><B>2024</B></P>
</DIV></TD>
    <TD STYLE="width: 11%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>(*)</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 11%; padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center"><B>March </B></P>
    <P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center"><B>31, </B></P>
    <P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center"><B>2024</B></P>
</DIV></TD>
    <TD STYLE="white-space: nowrap; width: 11%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 1pt 0 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Sesamm</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">23,584</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">22,059</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">1,525</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">36%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">36%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">&Aacute;guas de Andradina</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">10,673</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">10,225</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">448</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">30%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">30%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">&Aacute;guas de Castilho</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">4,015</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">3,835</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">180</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">30%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">30%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Attend Ambiental</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">21,521</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">19,469</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">2,052</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">45%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">45%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Aquapolo Ambiental</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">55,025</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">50,196</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">4,829</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">49%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">49%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Paulista Geradora de Energia</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">6,866</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">6,861</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">5</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">25%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">25%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Cantareira SP Energia</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">5,242</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">5,212</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">30</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">49%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">49%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">FOXX URE-BA Ambiental</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">12,486</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">12,663</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">(60)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(117)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">20%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">20%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Infranext Solu&ccedil;&otilde;es
    em Pavimenta&ccedil;&atilde;o</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">45%</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: center"><FONT STYLE="font-size: 8pt">45%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Total</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">139,412</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">130,520</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">9,009</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(117)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 2.4pt 0 1pt">&nbsp;</P>
    <P STYLE="font: 7.5pt Georgia, Times, Serif; margin: 2.4pt 0 1pt">FOXX URE-BA Ambiental &ndash; Fair value (**)</P></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 8pt">25,018</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 7.5pt">25,244</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-bottom: 1pt"><FONT STYLE="font-size: 8pt">Other investments</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">6,099</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">6,099</P></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt">&nbsp;</P>
    <P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt">Overall total</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 2.25pt double">170,529</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 2.4pt 0 1pt; text-align: right; border-bottom: Black 2.25pt double">161,863</P></TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt 1pt; white-space: nowrap; text-align: right">&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(*) The amount presented refers to changes in the equity
of the investee, as its financial statements for the year ended December 31, 2023 were issued after the disclosure of SABESP&rsquo;s
financial statements.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(**) The amount presented refers to the fair value adjustment
in the acquisition of FOXX URE-BA in 2024.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(***) The amount of the investee&rsquo;s loss exceeding
the investment was reclassified to Noncurrent Liabilities.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>12</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Investment
                                            Properties</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 30%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 26%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD>
    <TD STYLE="width: 18%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Depreciation</B></P></TD>
    <TD STYLE="width: 26%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 12pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 12pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 12pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 12pt">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 12pt"><FONT STYLE="font-size: 8pt">Investment
    properties</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 8pt/12pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">46,678</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 8pt/12pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(12)</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 8pt/12pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">46,666</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 30%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 26%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2022</B></P></TD>
    <TD STYLE="width: 18%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Depreciation</B></P></TD>
    <TD STYLE="width: 26%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 12pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 12pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 12pt">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 12pt">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 12pt"><FONT STYLE="font-size: 8pt">Investment
    properties</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 8pt/12pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">46,726</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 8pt/12pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(12)</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 8pt/12pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">46,714</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2024, the market value of these properties
was approximately R$ 393,600 (R$ 393,600 as of December 31, 2023).</P>


<!-- Field: Page; Sequence: 61 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->59<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/12pt Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/12pt Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>13</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Contract
                                            asset</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="5" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    </B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 25%; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 15%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 14%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Additions (i)</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 14%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Transfers</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 17%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Transfers of
    works to intangible assets (ii)</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 15%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in; border-bottom: Black 0.5pt solid"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center"><B>March 31, </B></P>
    <P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center"><B>2024 (iii)</B></P>
</DIV></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Total contract
    asset</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">7,393,096</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,270,307</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,952</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(1,082,990)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">7,582,365</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="5" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 25%; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 15%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 14%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Additions (i)</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 14%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Transfers</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 17%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Transfers of
    works to intangible assets (ii)</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 15%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in; border-bottom: Black 0.5pt solid"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center"><B>March 31, </B></P>
    <P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center"><B>2024 (iii)</B></P>
</DIV></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Total contract
    asset</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">7,393,096</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,270,667</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,952</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(1,082,990)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">7,582,725</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2024 and December 31, 2023, the contract
asset had no amounts recognized as leases. Leases were part of construction costs and, since June 2020, additional works had been executed
by the Company.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="5" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 25%; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 15%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2022</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 14%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Additions </B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 14%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Transfers</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 17%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Transfers of
    works to intangible assets </B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 15%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in; border-bottom: Black 0.5pt solid"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center"><B>March 31, </B></P>
    <P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: center"><B>2023</B></P>
</DIV></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Total contract
    asset</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">8,613,968</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,204,867</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">280</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(1,105,061)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">8,714,054</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2023, the contract asset included R$
175,145, recorded as a lease (R$ 276,893 as of December 31, 2022). Leases were part of construction costs and, since June 2020, additional
works had been executed by the Company.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 42.55pt"><FONT STYLE="font-size: 10pt">(i)</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">The
                                            largest additions in the period were located in the municipalities of S&atilde;o Paulo, Guarulhos,
                                            and Itanha&eacute;m, totaling R$ 558 million, R$ 110 million, and R$ 43 million, respectively.
                                            </FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 42.55pt"><FONT STYLE="font-size: 10pt">(ii)</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">The
                                            largest transfers in the period were located in the municipalities of S&atilde;o Paulo, Cajamar,
                                            and Aruj&aacute;, totaling R$ 403 million, R$ 95 million, and R$ 63 million, respectively.</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 42.55pt"><FONT STYLE="font-size: 10pt">(iii)</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">The
                                            largest works were located in the municipalities of S&atilde;o Paulo, Guarulhos, and Francisco
                                            Morato, totaling R$ 2,207 million, R$ 320 million, and R$ 260 million, respectively.</FONT></TD></TR></TABLE>


<!-- Field: Page; Sequence: 62 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->60<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(a)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Capitalization
                                            of interest and other finance charges</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company capitalizes interest, inflation adjustments,
and exchange variations in the contract asset during the construction period. From January to March 2024, the Company capitalized R$
154,395 (R$ 167,802 from January to March 2023).</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(b)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Construction
                                            margin</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The Company is primarily responsible for the construction
and installation of the concession infrastructure, either by using its employees or contracting third parties, and is significantly exposed
to its risks and benefits. Accordingly, the Company recognizes revenue from construction services corresponding to construction costs
increased by gross margin.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">Constructions related to the concessions are usually
performed by third parties. In such a case, the margin is lower to cover administration costs and the assumption of responsibility for
primary risks. As of March 31, 2024 and 2023, the margin was 2.3%.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">From January to March 2024, the construction margin
was R$&nbsp;30,046 (R$&nbsp;26,519 from January to March 2023).</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(c)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Expropriations
                                            </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify; text-indent: -20.65pt">As a result of the construction
of priority projects related to water and sewage systems, the Company is required to expropriate third-party properties, whose owners
are compensated either amicably or through court.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The costs of such expropriations are recorded in the
contract asset during the execution of the works. From January to March 2024, expropriations totaled R$&nbsp;6,750 (R$&nbsp;4,015 from
January to March 2023).</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>14</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Intangible
                                            assets</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(a)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Statement
                                            of financial position details</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="6" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 39%; padding-bottom: 1pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 9%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Cost</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 11%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Accumulated
    amortization</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 10%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Net</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 9%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Cost</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 12%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Accumulated
    amortization</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 10%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Net</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Intangible
    right arising from:</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Concession
    agreements &ndash; equity value</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">754,555</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(247,159)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">507,396</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">747,925</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(241,808)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">506,117</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Concession
    agreements &ndash; economic value </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,687,440</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(1,085,649)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">601,791</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,686,384</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(1,048,624)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">637,760</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Program
    contracts </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">30,924,633</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(9,874,351)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">21,050,282</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">30,267,977</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(9,583,480)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">20,684,497</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Program
    contracts &ndash; commitments </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,709,757</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(510,973)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,198,784</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,709,757</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(497,731)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,212,026</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Service
    contracts &ndash; S&atilde;o Paulo</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">29,557,680</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(9,318,616)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">20,239,064</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">29,161,286</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(8,967,701)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">20,193,585</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Software
    license of use</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,310,942</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(822,184)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">488,758</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,300,504</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(787,280)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">513,224</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Right of
    use &ndash; Other assets</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">291,027</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(64,336)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">226,691</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">217,204</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(99,144)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">118,060</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">66,236,034</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(21,923,268)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">44,312,766</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">65,091,037</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(21,225,768)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">43,865,269</P></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 63 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->61<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="6" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 39%; padding-bottom: 1pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 9%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Cost</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 11%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Accumulated
    amortization</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 10%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Net</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 9%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Cost</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 12%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Accumulated
    amortization</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 10%; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Net</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Intangible
    right arising from:</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Concession
    agreements &ndash; equity value</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">754,555</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(247,159)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">507,396</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">747,925</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(241,808)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">506,117</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Concession
    agreements &ndash; economic value </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,687,440</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(1,085,649)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">601,791</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,686,384</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(1,048,624)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">637,760</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Concession
    agreements &ndash; new contracts</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">148,000</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(1,644)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">146,356</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">148,000</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(411)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">147,589</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Program
    contracts </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">30,924,633</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(9,874,351)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">21,050,282</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">30,267,977</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(9,583,480)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">20,684,497</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Program
    contracts &ndash; commitments </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,709,757</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(510,973)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,198,784</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,709,757</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(497,731)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,212,026</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Service
    contracts &ndash; S&atilde;o Paulo</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">29,557,680</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(9,318,616)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">20,239,064</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">29,161,286</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(8,967,701)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">20,193,585</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Software
    license of use</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,310,942</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(822,184)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">488,758</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">1,300,504</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(787,280)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">513,224</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Right of
    use &ndash; Other assets</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">291,027</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(64,336)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">226,691</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">217,204</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(99,144)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">118,060</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">66,384,034</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(21,924,912)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">44,459,122</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">65,239,037</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(21,226,179)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">44,012,858</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(b)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Changes</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="7" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 23%; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>December </B></P>
    <P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>31, </B></P>
    <P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2023</B></P>
</DIV></TD>
    <TD STYLE="width: 10%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Additions</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Transfer of
    contract asset</B></P></TD>
    <TD STYLE="width: 12%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Transfers </B></P></TD>
    <TD STYLE="white-space: nowrap; width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Write-offs and
    disposals</B></P></TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Amortization</B></P></TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>March </B></P>
    <P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>31, </B></P>
    <P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Intangible
    right arising from: </FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Concession
    agreements &ndash; equity value (*)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">506,117</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">6,587</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">39</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(20)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(5,327)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">507,396</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Concession
    agreements &ndash; economic value&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">637,760</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">1,089</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(4)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(37,054)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">601,791</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 3pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Program
    contracts (*)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 3pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">20,684,497</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">181</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">663,509</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(930)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(606)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(296,369)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">21,050,282</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Program
    contracts &ndash; commitments&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">1,212,026</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(13,242)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">1,198,784</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Service
    contracts &ndash; S&atilde;o Paulo </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">20,193,585</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">404,279</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(3,949)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(132)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(354,719)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">20,239,064</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Software
    license of use </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">513,224</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">2,911</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">7,526</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">1</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(34,904)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">488,758</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Right
    of use &ndash; Other assets</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">118,060</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">130,667</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(46)</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(21,990)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">226,691</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">Total
    </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">43,865,269</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">133,759</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,082,990</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(4,843)</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(804)</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(763,605)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">44,312,766</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">(*) As of March 31, 2024, Concession agreements &ndash;
equity value, and Program contracts included leases totaling R$ 41,160 and R$ 324,416 (R$ 43,738 and R$ 330,941 as of December 31, 2023),
respectively.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0">&nbsp;</P>


<!-- Field: Page; Sequence: 64 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->62<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="7" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 23%; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>December </B></P>
    <P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>31, </B></P>
    <P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2023</B></P>
</DIV></TD>
    <TD STYLE="width: 10%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Additions</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Transfer of
    contract asset</B></P></TD>
    <TD STYLE="width: 12%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Transfers </B></P></TD>
    <TD STYLE="white-space: nowrap; width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Write-offs and
    disposals</B></P></TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Amortization</B></P></TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>March </B></P>
    <P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>31, </B></P>
    <P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Intangible
    right arising from: </FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Concession
    agreements &ndash; equity value (*)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">506,117</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">6,587</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">39</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(20)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(5,327)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">507,396</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Concession
    agreements &ndash; economic value&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">637,760</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">1,089</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(4)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(37,054)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">601,791</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Concession
    agreements &ndash; new contracts&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">147,589</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(1,233)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">146,356</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 3pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Program
    contracts (*)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 3pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">20,684,497</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">181</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">663,509</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(930)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(606)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(296,369)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">21,050,282</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Program
    contracts &ndash; commitments&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">1,212,026</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(13,242)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">1,198,784</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Service
    contracts &ndash; S&atilde;o Paulo </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">20,193,585</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">404,279</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(3,949)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(132)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(354,719)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">20,239,064</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Software
    license of use </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">513,224</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">2,911</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">7,526</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">1</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(34,904)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">488,758</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Right
    of use &ndash; Other assets</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">118,060</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">130,667</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(46)</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(21,990)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">226,691</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 7pt">Total
    </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">44,012,858</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">133,759</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,082,990</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(4,843)</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(804)</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(764,838)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">44,459,122</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="7" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 23%; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>December </B></P>
    <P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>31, </B></P>
    <P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2022</B></P>
</DIV></TD>
    <TD STYLE="width: 10%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Additions</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Transfer of
    contract asset</B></P></TD>
    <TD STYLE="width: 12%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Transfers </B></P></TD>
    <TD STYLE="white-space: nowrap; width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Write-offs and
    disposals</B></P></TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Amortization</B></P></TD>
    <TD STYLE="width: 11%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>March </B></P>
    <P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>31, 2023</B></P>
</DIV></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Intangible
    right arising from: </FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Concession
    agreements - equity value (*)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">499,326</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">4,098</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(955)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(6)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(4,994)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">497,469</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Concession
    agreements &ndash; economic value&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">652,039</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">2,589</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">331</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(85)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(30,249)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">624,625</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 3pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Program
    contracts (*)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">18,337,459</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">2</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">569,717</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(288)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(2,055)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(252,011)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">18,652,824</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Program
    contracts &ndash; commitments&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">1,264,992</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(13,242)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">1,251,750</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Service
    contracts &ndash; S&atilde;o Paulo </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">17,870,451</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">513,453</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(1,720)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(1,056)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(299,179)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">18,081,949</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Software
    license of use </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">595,404</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">15,204</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(33,105)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">577,503</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Right
    of use &ndash; Other assets</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">75,052</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">320</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(30)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">(17,261)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 7pt">58,081</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Right
    of use &ndash; Investments</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">26,148</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(26,148)</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Total
    </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">39,320,871</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">322</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,105,061</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(28,780)</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(3,232)</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(650,041)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">39,744,201</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-size: 10pt">(*) As of March 31, 2023,
Concession agreements &ndash; equity value, and Program contracts included leases totaling R$ 51,692 and R$ 165,104 (</FONT><FONT STYLE="font-size: 9.5pt">R$
54,356 and R$ 168,216 as of December 31, 2022)</FONT><FONT STYLE="font-size: 10pt">, respectively.</FONT></P>


<!-- Field: Page; Sequence: 65 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->63<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of June 30, 2020, a contract was signed for the provision
of treatment services and final disposal of solid waste and collection of garbage tax in the Municipality of Diadema for 40 years. This
contract is in the process of termination due to the interest of the Granting Authority in closing it.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(c)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Intangible
                                            right arising from concession agreements</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2024, the amounts not yet disbursed
were recorded in &ldquo;Program contract commitments&rdquo; under current and noncurrent liabilities, totaling R$&nbsp;20,986 and R$&nbsp;12,139
(R$&nbsp;21,969 and R$&nbsp;12,047 as of December 31, 2023), respectively.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(d)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Public-Private
                                            Partnership - PPP</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">SABESP carries out operations related to the S&atilde;o
Louren&ccedil;o PPP. Such transactions, along with their corresponding guarantees and obligations, are supported by a contract established
based on Law 11,079/2004.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">In June 2008, SABESP and Alto Tiet&ecirc; PPP (SPAT
Saneamento S/A) executed a service agreement for 15 years, with operations ending in October 2011 after conclusion of the works. The
end of the obligations related to this PPP occurred in February 2024.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The amounts recorded in intangible assets are as follows:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 11pt Georgia, Times, Serif; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-top: 1pt; padding-bottom: 1pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; width: 36%; padding-top: 1pt; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; width: 32%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: right; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="vertical-align: bottom; width: 32%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: right; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-top: 1pt; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Alto Tiet&ecirc;</FONT></TD>
    <TD STYLE="padding: 1pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">231,146</FONT></TD>
    <TD STYLE="padding: 1pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">235,224</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-top: 1pt; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">S&atilde;o
    Louren&ccedil;o</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: right; border-bottom: Black 0.5pt solid">2,513,527</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: right; border-bottom: Black 0.5pt solid">2,556,002</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-top: 1pt; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: right; border-bottom: Black 1.5pt double">2,744,673</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: right; border-bottom: Black 1.5pt double">2,791,226</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2024 and December 31, 2023, the obligations
assumed by the Company are as follows:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="6" STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD COLSPAN="3" STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 16%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 14%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Current liabilities</B></P></TD>
    <TD STYLE="width: 14%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Noncurrent liabilities</B></P></TD>
    <TD STYLE="width: 14%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Total liabilities</B></P></TD>
    <TD STYLE="width: 14%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Current liabilities</B></P></TD>
    <TD STYLE="width: 14%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Noncurrent liabilities</B></P></TD>
    <TD STYLE="width: 14%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Total liabilities</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Alto Tiet&ecirc;</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">-</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">-</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">-</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">52,762</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">-</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">52,762</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">S&atilde;o
    Louren&ccedil;o</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">435,671</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,787,032</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">3,222,703</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">435,164</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,798,688</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">3,233,852</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">435,671</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">2,787,032</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">3,222,703</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">487,926</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">2,798,688</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">3,286,614</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(e)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Amortization
                                            of Intangible Assets</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The average amortization rate totaled 5.1% and 5.0%
as of March 31, 2024 and 2023, respectively.</P>


<!-- Field: Page; Sequence: 66 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->64<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(f)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Leases
                                            and right of use</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 46%; padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="width: 29%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company and Consolidated</B></P></TD>
    <TD STYLE="width: 25%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; border-bottom: Black 0.5pt solid"><B>Nature</B></P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>March 31, </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>December 31, </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2023</B></P>
</DIV></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Leases
    - Concession and Program Contract</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cost</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">582,617</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">588,600</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accumulated
    amortization</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(217,041)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(213,921)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;(=)
    Net</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">365,576</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">374,679</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Right
    of use &ndash; Other assets </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Vehicles</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">232,477</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">205,593</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Properties</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">58,505</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">11,566</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Equipment</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">45</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">45</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accumulated
    amortization</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(64,336)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(99,144)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;(=)
    Net</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">226,691</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">118,060</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 0.5pt; border-top: Black 0.5pt solid; border-bottom: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 0.5pt; border-top: Black 0.5pt solid; border-bottom: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total
    - Leases and Right of use</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">592,267</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">492,739</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The lease liability corresponds to total future fixed
lease payments, adjusted to present value, considering an incremental rate on borrowings. For further information, see Note 16.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">The table below shows the impact on the Company&rsquo;s
result:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD COLSPAN="3" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Impact on
    the result</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 54%; padding-top: 1pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 23%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD>
    <TD STYLE="width: 23%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center"><B>March 31, </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: center"><B>2024</B></P>
</DIV></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center"><B>March 31, </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: center"><B>2023</B></P>
</DIV></TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Right of use amortization</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(25,110)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(23,037)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Financial result &ndash; interest
    expense and inflation adjustment</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(31,298)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(18,127)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Expenses of short-term leases
    with low value</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: right; border-bottom: Black 0.5pt solid">(3,151)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: right; border-bottom: Black 0.5pt solid">(8,518)</P></TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Reduction
    of profit for the period</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: right; border-bottom: Black 1.5pt double">(59,559)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: right; border-bottom: Black 1.5pt double">(49,682)</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>


<!-- Field: Page; Sequence: 67 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->65<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(g)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Performance
                                            Agreements</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">As of March 31, 2024, the accounting balances of the
agreements in force recorded in contract asset and intangible assets were R$ 182,365 and R$ 2,209,196 (R$ 183,876 and R$ 2,191,361 as
of December 31, 2023), respectively.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>15</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Property,
                                            plant and equipment </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(a)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Statement
                                            of financial position details</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="8" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="4" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD COLSPAN="4" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; width: 25%; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; vertical-align: bottom; width: 8%; padding-left: 2.85pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Cost</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; vertical-align: bottom; width: 11%; padding-left: 2.85pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Accumulated
    depreciation</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; vertical-align: bottom; width: 9%; padding-left: 2.85pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Net</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; vertical-align: top; width: 9%; padding-left: 2.85pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Annual
    average depreciation rate</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; vertical-align: bottom; width: 8%; padding-left: 2.85pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Cost</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; vertical-align: bottom; width: 11%; padding-left: 2.85pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Accumulated
    depreciation</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; vertical-align: bottom; width: 9%; padding-left: 2.85pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Net</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; vertical-align: top; width: 10%; padding-left: 2.85pt"><P STYLE="font: 7pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Annual
    average depreciation rate</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Land</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">94,228</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">94,228</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">94,228</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">94,228</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">-</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 9pt/110% Univers, Helvetica, Sans-Serif; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 8pt">Buildings</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">126,959</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(45,197)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">81,762</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">2.2%</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">125,672</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(44,726)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">80,946</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">2.2%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Equipment</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">452,917</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(318,950)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">133,967</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">14.1%</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">443,380</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(313,193)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">130,187</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">14.2%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Transportation
    equipment</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">14,904</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(10,810)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">4,094</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">9.9%</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">14,625</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(10,384)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">4,241</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">9.9%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Furniture
    and fixtures </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">41,123</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(16,328)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">24,795</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">6.7%</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">41,049</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">(15,876)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">25,173</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 8pt">6.8%</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Other</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">147,120</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,654)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">145,466</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">6.5%</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">140,548</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(764)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">139,784</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">6.5%</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">877,251</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(392,939)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">484,312</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">9.6%</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">859,502</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(384,943)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">474,559</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">9.7%</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-size: 10pt"><B>(b)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Changes</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="6" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 28%; padding-right: 5.65pt; padding-bottom: 1pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 12%; padding-left: 2.85pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 12%; padding-left: 2.85pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Additions</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 12%; padding-left: 2.85pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Transfers</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 12%; padding-left: 2.85pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Write-offs and
    disposals</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 12%; padding-left: 2.85pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Depreciation</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 12%; padding-left: 2.85pt"><DIV STYLE="margin-right: 5.65pt; margin-left: 0in; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>March 31,</B></P>
    <P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 8pt">Land</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">94,228</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">94,228</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 9pt Univers, Helvetica, Sans-Serif; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 8pt">Buildings</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">80,946</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">603</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">692</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(479)</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">81,762</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 8pt">Equipment</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">130,187</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">9,147</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">1,740</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(109)</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(6,998)</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">133,967</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 8pt">Transportation
    equipment</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">4,241</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(147)</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">4,094</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 8pt">Furniture
    and fixtures </FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">25,173</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">382</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(223)</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(5)</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(532)</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">24,795</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 8pt">Other</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">139,784</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">5,779</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">682</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(779)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">145,466</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 8pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">474,559</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">15,911</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">2,891</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(114)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(8,935)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">484,312</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>


<!-- Field: Page; Sequence: 68 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->66<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="6" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 28%; padding-right: 5.65pt; padding-bottom: 1pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 12%; padding-left: 2.85pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2022</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 12%; padding-left: 2.85pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Additions</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 12%; padding-left: 2.85pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Transfers</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 12%; padding-left: 2.85pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Write-offs and
    disposals</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 12%; padding-left: 2.85pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Depreciation</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 12%; padding-left: 2.85pt"><DIV STYLE="margin-right: 5.65pt; margin-left: 0in; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>March 31,</B></P>
    <P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2023</B></P>
</DIV></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 8pt">Land</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">94,228</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">94,228</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 9pt Univers, Helvetica, Sans-Serif; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 8pt">Buildings</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">47,968</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">1,037</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(85)</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(296)</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">48,624</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 8pt">Equipment</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">120,865</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">16,881</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">87</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(243)</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(6,235)</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">131,355</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 8pt">Transportation
    equipment</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">2,495</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">2,059</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(149)</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">4,405</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 8pt">Furniture
    and fixtures </FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">23,496</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">3,027</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">291</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(40)</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">(391)</FONT></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: right"><FONT STYLE="font-size: 8pt">26,383</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 8pt">Other</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">49,887</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">10,009</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(21)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">59,875</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.65pt; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 8pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">338,939</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">30,954</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">2,352</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(283)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(7,092)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">364,870</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 6pt; text-align: justify">&nbsp;</P>


<!-- Field: Page; Sequence: 69 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->67<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>16</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Borrowings
                                            and financing</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify; text-indent: -35.45pt"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD COLSPAN="6" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt"><B>&nbsp;Borrowings
    and financing outstanding balance</B></FONT></TD>
    <TD COLSPAN="3" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD COLSPAN="3" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 53%; padding-right: 3.5pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt"><B>Financial
    institution</B></FONT></TD>
    <TD STYLE="white-space: nowrap; width: 7%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>
    <P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>Current</B></P>
</DIV></TD>
    <TD STYLE="white-space: nowrap; width: 8%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Noncurrent</B><BR>
    <BR></P></TD>
    <TD STYLE="white-space: nowrap; width: 8%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>
    <P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>Total</B></P>
</DIV></TD>
    <TD STYLE="white-space: nowrap; width: 9%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>
    <P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>Current</B></P>
</DIV></TD>
    <TD STYLE="white-space: nowrap; width: 8%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Noncurrent</B><BR>
    <BR></P></TD>
    <TD STYLE="white-space: nowrap; width: 7%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>
    <P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>Total</B></P>
</DIV></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt"><B>Local
    currency</B></FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;12th
    issue debentures</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">56,517</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">56,517</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">45,450</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">22,385</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">67,835</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;18th
    issue debentures</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">40,975</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">40,975</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">46,962</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">46,962</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;22nd
    issue debentures</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">174,245</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">174,245</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">170,957</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">170616</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">341,573</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;23rd
    issue debentures</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">490,841</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">374,303</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">865,144</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">490,810</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">374,279</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">865,089</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;24th
    issue debentures</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">523,163</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">523,163</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">512,122</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">512,122</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;26th
    issue debentures</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,330,768</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,330,768</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,302,042</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,302,042</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;27th
    issue debentures</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">200,000</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">498,704</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">698,704</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">200,000</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">498,634</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">698,634</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;28th
    issue debentures</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">127,745</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,070,548</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,198,293</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">127,715</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,070,457</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,198,172</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;29th
    issue debentures</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,332,090</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,332,090</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,314,136</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,314,136</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;30th
    issue debentures</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">124,988</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">748,275</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">873,263</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">125,000</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">873,231</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">998,231</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;31st
    issue debentures</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2,933,677</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2,933,677</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Brazilian
    Federal Savings Bank</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">110,235</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,489,676</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,599,911</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">108,210</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,508,275</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,616,485</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Brazilian Development
    Bank - BNDES PAC II 9751</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">7,295</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">14,519</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">21,814</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">7,286</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">16,316</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">23,602</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Brazilian Development
    Bank - BNDES PAC II 9752</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">4,943</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">9,885</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">14,828</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">4,936</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">11,107</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">16,043</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Brazilian Development
    Bank - BNDES ONDA LIMPA</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">27,223</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">27,223</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">27,219</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">6,766</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">33,985</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Brazilian
    Development Bank &ndash; BNDES TIET&Ecirc; III</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">200,947</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">602,767</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">803,714</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">200,693</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">652,175</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">852,868</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Brazilian
    Development Bank - BNDES 2015</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">34,189</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">351,960</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">386,149</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">34,146</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">360,021</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">394,167</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Brazilian
    Development Bank - BNDES 2014</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">6,646</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">8,471</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">15,117</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">6,638</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">10,107</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">16,745</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Inter-American
    Development Bank &ndash; IDB 2202 </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">181,349</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,893,180</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2,074,529</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">181,349</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,983,615</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2,164,964</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Inter-American
    Development Bank &ndash; IDB INVEST</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">41,760</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">794,125</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">835,885</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">39,550</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">814,840</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">854,390</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Inter-American
    Development Bank &ndash; IDB INVEST 2022</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">14,100</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">438,305</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">452,405</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">14,100</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">438,241</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">452,341</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Inter-American
    Development Bank &ndash; IDB INVEST 2023</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">14,100</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">447,808</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">461,908</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">14,100</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">447,791</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">461,891</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;International
    Finance Corporation - IFC 2022</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">22,800</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">714,139</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">736,939</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">22,800</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">713,910</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">736,710</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;International
    Finance Corporation - IFC 2023</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">987,006</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">987,006</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">986,651</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">986,651</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Leases
    (Concession Agreements, Program Contracts, and Contract Asset)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">106,362</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">206,075</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">312,437</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">49,884</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">259,326</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">309,210</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Leases
    (others)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">100,102</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">151,548</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">251,650</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">68,499</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">73,801</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">142,300</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Other</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">3,006</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2,161</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">5,167</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">3,003</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2,910</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">5,913</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Interest
    and other charges</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: right; border-bottom: Black 0.5pt solid">379,694</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: right; border-bottom: Black 0.5pt solid">379,694</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: right; border-bottom: Black 0.5pt solid">377,398</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: right; border-bottom: Black 0.5pt solid">377,398</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.3pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt"><B>Total
    in local currency</B></FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 0.5pt solid">2,470,062</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 0.5pt solid">16,923,153</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 0.5pt solid">19,393,215</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 0.5pt solid">2,366,705</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 0.5pt solid">14,423,754</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 0.5pt solid">16,790,459</P></TD></TR>
  </TABLE>
<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>


<!-- Field: Page; Sequence: 70 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->68<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD COLSPAN="6" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;<B>Borrowings
    and financing outstanding balance</B></FONT></TD>
    <TD COLSPAN="3" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD COLSPAN="3" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 53%; padding-right: 3.5pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt"><B>Financial
    institution</B></FONT></TD>
    <TD STYLE="white-space: nowrap; width: 7%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>
    <P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>Current</B></P>
</DIV></TD>
    <TD STYLE="white-space: nowrap; width: 8%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Noncurrent</B><BR>
    <BR></P></TD>
    <TD STYLE="white-space: nowrap; width: 8%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>
    <P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>Total</B></P>
</DIV></TD>
    <TD STYLE="white-space: nowrap; width: 9%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>
    <P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>Current</B></P>
</DIV></TD>
    <TD STYLE="white-space: nowrap; width: 8%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Noncurrent</B><BR>
    <BR></P></TD>
    <TD STYLE="white-space: nowrap; width: 7%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>
    <P STYLE="font: 8pt Georgia, Times, Serif; margin: 0; text-align: center"><B>Total</B></P>
</DIV></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt"><B>Foreign
    currency</B></FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Inter-American Development
    Bank - IDB 1212 &ndash; US$ 15,417 thousand (US$ 20,556 thousand in December 2023)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">51,351</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">25,676</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">77,027</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">49,759</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">49,759</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">99,518</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Inter-American Development
    Bank - IDB 4623 &ndash; US$ 152,187 thousand (US$ 152,187 thousand in December 2023)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">736,321</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">736,321</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">712,449</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">712,449</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;International Bank
    for Reconstruction and Development (IBRD) &ndash; IBRDs 7662 and 8916 - US$ 104,405 thousand (US$ 78,197 thousand in December 2023)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">30,375</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">476,883</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">507,258</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">29,433</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">477,554</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">506,987</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;JICA 15 &ndash; &yen;
    6,338,365 thousand (&yen; 6,914,580 thousand in December 2023)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">38,042</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">171,188</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">209,230</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">39,437</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">197,180</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">236,617</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;JICA 18 &ndash; &yen;
    5,698,880 thousand (&yen; 6,216,960 thousand in December 2023)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">34,204</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">153,803</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">188,007</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">35,457</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">177,168</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">212,625</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;JICA 17 &ndash; &yen;
    3,464,352 thousand (&yen; 3,464,352 thousand in December 2023)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">9,530</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">104,054</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">113,584</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">9,879</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">107,880</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">117,759</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;JICA 19 &ndash; &yen;
    23,575,734 thousand (&yen; 24,482,493 thousand in December 2023)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">59,864</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">716,868</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">776,732</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">62,059</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">774,200</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">836,259</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">&nbsp;Interest and other
    charges</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: right; border-bottom: Black 0.5pt solid">22,933</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: right; border-bottom: Black 0.5pt solid">22,933</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: right; border-bottom: Black 0.5pt solid">23,677</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: right; border-bottom: Black 0.5pt solid">23,677</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.3pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt"><B>Total
    in foreign currency</B></FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 0.5pt solid">246,299</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 0.5pt solid">2,384,793</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 0.5pt solid">2,631,092</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 0.5pt solid">249,701</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 0.5pt solid">2,496,190</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 0.5pt solid">2,745,891</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.3pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt"><B>Total borrowings and
    financing</B></FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">2,716,361</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">19,307,946</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">22,024,307</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">2,616,406</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">16,919,944</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">19,536,350</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD COLSPAN="7" STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 0.1pt"><I>&nbsp;</I></P>
    <P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 0.1pt">Exchange rates as of March 31, 2024: US$ 4.9962; &yen;&nbsp;0.03301
    (as of December 31, 2023: US$ 4.8413; &yen; 0.03422).</P>
    <P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0 0 0.1pt">As of March 31, 2024, the Company did not have balances of borrowings
    and financing raised during the year, maturing within 12 months.</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD COLSPAN="7" STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.1pt; padding-left: 3.5pt">&nbsp;</TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 71 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->69<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 2pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 50%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Local currency</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 9%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Guarantees</B></P></TD>
    <TD STYLE="width: 8%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Maturity</B></P></TD>
    <TD STYLE="width: 23%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Annual interest
    rate</B></P></TD>
    <TD STYLE="width: 10%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Inflation
    adjustment</B></P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">12th
    issue debentures</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2025</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">TR
    + 9.5% </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">17th
    issue debentures</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2023</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">CDI
    + 0.75% (series 1), 4.5% (series 2), and 4.75% (series 3)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">IPCA
    (series 2 and 3)</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">18th
    issue debentures</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2024</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">TJLP
    + 1.92 % (series 1 and 3) and 8.25% (series 2)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">IPCA
    (series 2)</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">22nd
    issue debentures</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2025</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">CDI
    + 0.58% (series 1) and CDI+ 0.90% (series 2) and 6.0% (series 3)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">IPCA
    (series 3)</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">23rd
    issue debentures</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2027</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">CDI
    + 0.49% (series 1) and CDI+ 0.63% (series 2)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">24th
    issue debentures</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2029</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">3.20%
    (series 1) and 3.37% (series 2)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">IPCA
    (series 1 and 2)</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">26th
    issue debentures</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2030</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">4.65%
    (series 1) and 4.95% (series 2)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">IPCA
    (series 1 and 2)</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">27th
    issue debentures</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2027</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">CDI
    + 1.60% (series 1) and CDI+ 1.80% (series 2) and 2.25% (series 3)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">28th
    issue debentures</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2028</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right">CDI + 1.20% (series 1) and CDI+ 1.44% (series 2)
    and</P>
    <P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right">1.60% (series 3)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">29th
    issue debentures</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2036</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right">CDI + 1.29% (series 1), 5.3058% (series 2), and</P>
    <P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right">5.4478% (series 3)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">IPCA
    (series 2 and 3)</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">30th
    issue debentures</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2029</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">CDI
    + 1.30% (series 1) and CDI+ 1.58% (series 2)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">31st
    issue debentures</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2034</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">CDI
    +0.49 (series 1) and CDI+1.10% (series 2) and CDI+1.31% (series 3)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Brazilian
    Federal Savings Bank</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2024/2042</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">5% to
    9.5%</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">TR</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Brazilian Development Bank
    - BNDES PAC II 9751</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2027</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">TJLP
    + 1.72% </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Brazilian Development Bank
    - BNDES PAC II 9752</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2027</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">TJLP
    + 1.72% </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Brazilian Development Bank
    - BNDES ONDA LIMPA</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2025</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">TJLP
    + 1.92% </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Brazilian Development Bank
    &ndash; BNDES TIET&Ecirc; III</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2028</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">TJLP
    + 1.66% </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Brazilian Development Bank
    - BNDES 2015</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2035</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">TJLP
    + 2.18% </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Brazilian Development Bank
    - BNDES 2014</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2026</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">TJLP
    + 1.76%</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8.5pt">Inter-American Development
    Bank &ndash; IDB 2202</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Government</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2035</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">CDI
    + 0.86%</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8.5pt">Inter-American Development
    Bank &ndash; IDB INVEST</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2034</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">CDI+
    1.90% and CDI 2.70%</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Inter-American Development
    Bank &ndash; IDB INVEST 2022</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2036</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">CDI
    + 2.50%</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Inter-American Development
    Bank &ndash; IDB INVEST 2023</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2036</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">CDI
    + 0.50%</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">International Finance Corporation
    - IFC </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2032</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">CDI
    + 2.00%</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Leases </FONT><FONT STYLE="font-size: 8.5pt">(Concession
    Agreements, Program Contracts, and Contract Asset)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2035</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">7.73%
    to 10.12% </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">IPC</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Leases (others)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2042</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">9.74%
    to 15.24%</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Other</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Own
    funds</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2025</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">3% (FEHIDRO);
    TJLP + 1.5% (FINEP)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>


<!-- Field: Page; Sequence: 72 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->70<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify; text-indent: -35.45pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 50%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Foreign currency</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 10%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Guarantees</B></P></TD>
    <TD STYLE="width: 8%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Maturity</B></P></TD>
    <TD STYLE="width: 23%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Annual interest
    rate</B></P></TD>
    <TD STYLE="width: 9%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Exchange variation</B></P></TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Inter-American Development
    Bank - IDB 1212 </FONT><FONT STYLE="font-size: 8.5pt">&ndash; </FONT><FONT STYLE="font-size: 8pt">US$ 15,417 thousand</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Government</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2025</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">SOFR
    +5.13%</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">US$</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8.5pt">Inter-American
    Development Bank - IDB 4623 &ndash; </FONT><FONT STYLE="font-size: 8pt">US$ 152,187 thousand</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Government</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2044</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">SOFR
    + 6.55055%</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">US$</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">International
    Bank for Reconstruction and Development (IBRD) &ndash; </FONT><FONT STYLE="font-size: 8.5pt">IBRDs 7662 and 8916 - </FONT><FONT STYLE="font-size: 8pt">US$
    104,405 thousand</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Government</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2034</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">SOFR
    + 6.06% and 7.16%</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">US$</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">JICA 15 </FONT><FONT STYLE="font-size: 8.5pt">&ndash;
    </FONT><FONT STYLE="font-size: 8pt">&yen; 6,338,365 thousand </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Government</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2029</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1.8%
    and 2.5%</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Yen</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">JICA 18 </FONT><FONT STYLE="font-size: 8.5pt">&ndash;
    </FONT><FONT STYLE="font-size: 8pt">&yen; 5,698,880 thousand</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Government</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2029</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1.8%
    and 2.5%</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Yen</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">JICA 17 </FONT><FONT STYLE="font-size: 8.5pt">&ndash;
    </FONT><FONT STYLE="font-size: 8pt">&yen; 3,464,352 thousand </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Government</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2035</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1.2%
    and 0.01% </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Yen</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">JICA 19 </FONT><FONT STYLE="font-size: 8.5pt">&ndash;
    </FONT><FONT STYLE="font-size: 8pt">&yen; 23,575,734 thousand</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Government</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2037</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1.7%
    and 0.01% </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center"><FONT STYLE="font-size: 8pt">Yen</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 8pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>


<!-- Field: Page; Sequence: 73 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->71<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 8pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">(i)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Payment schedule &ndash; accounting
balances as of March 31, 2024</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="8" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 28%; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 9%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>2024</B></P></TD>
    <TD STYLE="width: 9%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>2025</B></P></TD>
    <TD STYLE="width: 9%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>2026</B></P></TD>
    <TD STYLE="width: 9%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>2027</B></P></TD>
    <TD STYLE="width: 9%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>2028</B></P></TD>
    <TD STYLE="width: 9%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>2029</B></P></TD>
    <TD STYLE="width: 9%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>2030 to 2044
    </B></P></TD>
    <TD STYLE="white-space: nowrap; width: 9%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 7pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>TOTAL</B></P></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 7pt"><B><I>LOCAL
    CURRENCY</I></B></FONT></TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Debentures</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">905,061</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">1,328,730</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">1,217,890</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">1,387,314</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">665,375</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">1,304,027</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">3,218,442</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">10,026,839</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Brazilian
    Federal Savings Bank</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">82,048</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">115,356</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">122,556</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">130,195</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">138,177</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">143,481</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">868,098</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">1,599,911</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">BNDES</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">210,955</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">260,803</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">250,860</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">238,124</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">84,351</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">34,189</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">189,563</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">1,268,845</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">IDBs
    - National </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">139,754</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">260,899</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">330,209</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">315,069</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">420,959</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">385,919</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">1,971,918</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">3,824,727</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">IFCs</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">22,800</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">44,200</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">61,800</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">80,800</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">123,600</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">181,600</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">1,209,145</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">1,723,945</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Leases
    </FONT><FONT STYLE="font-size: 8.5pt">(Concession Agreements, Program Contracts, Contract Asset, and others)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">151,818</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">133,170</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">64,062</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">22,899</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">58,917</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">19,012</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">114,209</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">564,087</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Other</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">2,254</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">2,771</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">142</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">5,167</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Interest
    and other charges</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">304,965</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">74,729</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">379,694</P></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt"><I>TOTAL
    IN LOCAL CURRENCY</I></FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">1,819,655</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">2,220,658</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">2,047,519</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">2,174,401</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">1,491,379</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">2,068,228</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">7,571,375</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">19,393,215</P></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 7pt"><B><I>FOREIGN
    CURRENCY</I></B></FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">IDB</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">25,676</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">71,361</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">40,019</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">40,019</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">40,019</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">40,019</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">556,235</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">813,348</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">IBRD</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">15,188</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">30,375</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">30,375</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">30,375</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">30,375</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">41,525</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">329,045</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">507,258</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">JICA</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">75,585</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">141,639</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">141,639</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">141,639</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">141,639</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">141,526</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">503,886</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">1,287,553</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Interest
    and other charges</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">19,741</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">3,192</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">22,933</P></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt"><I>TOTAL
    IN FOREIGN CURRENCY</I></FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">136,190</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">246,567</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">212,033</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">212,033</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">212,033</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">223,070</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">1,389,166</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">2,631,092</P></TD></TR>
  <TR>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt"><I>Total</I></FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 1.5pt double">1,955,845</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 1.5pt double">2,467,225</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 1.5pt double">2,259,552</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 1.5pt double">2,386,434</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 1.5pt double">1,703,412</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 1.5pt double">2,291,298</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 1.5pt double">8,960,541</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 1.5pt double">22,024,307</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>


<!-- Field: Page; Sequence: 74 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->72<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">(II)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Changes</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="12" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 26%; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="width: 6%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center"><B>December </B></P>
    <P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center"><B>31, </B></P>
    <P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center"><B>2023</B></P>
</DIV></TD>
    <TD STYLE="width: 7%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Addition
    (lease)</B></P></TD>
    <TD STYLE="width: 6%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Funding</B></P></TD>
    <TD STYLE="width: 5%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Borrowing
    costs</B></P></TD>
    <TD STYLE="width: 6%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Inflation
    adjustment and exchange rate changes</B></P></TD>
    <TD STYLE="width: 7%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Inflation
    adjustment / exchange rate change and incorporated interest- Capitalized</B></P></TD>
    <TD STYLE="width: 6%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Interest
    paid</B></P></TD>
    <TD STYLE="width: 7%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Amortization</B></P></TD>
    <TD STYLE="width: 7%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Accrued
    interest</B></P></TD>
    <TD STYLE="width: 6%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Provision
    for interest and fees - Capitalized</B></P></TD>
    <TD STYLE="width: 5%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Expenses
    with borrowing costs </B></P></TD>
    <TD STYLE="width: 6%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center"><B>March </B></P>
    <P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center"><B>31, </B></P>
    <P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.1pt; text-align: center"><B>2024</B></P>
</DIV></TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-right: 3.5pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 7pt"><B><I>LOCAL
    CURRENCY</I></B></FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Debentures</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">7,534,818</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2,940,478</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(7,319)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">51,281</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">10,953</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(166,538)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(316,082)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">151,082</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">36,657</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2,731</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">10,238,061</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Brazilian
    Federal Savings Bank</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">1,621,014</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">7,857</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,653</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">412</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(31,269)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(26,495)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">25,167</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">6,056</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,604,395</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">BNDES</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">1,341,472</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,096</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">553</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(24,734)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(70,274)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">16,743</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">8,191</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">59</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,273,106</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IDB
    2202</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">2,252,742</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(132,871)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(90,674)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">34,753</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">27,317</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">239</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2,091,506</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IDB
    INVEST 2020</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">900,367</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(61,148)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(18,670)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">28,095</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">165</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">848,809</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IFC
    2022</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">757,297</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">8,217</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">15,647</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">229</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">781,390</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IFC
    2023</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">1,006,642</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">10,690</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">20,362</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">355</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,038,049</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IDB
    INVEST 2022</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">454,543</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">14,842</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">64</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">469,449</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IDB
    INVEST 2023</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">464,131</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">15,038</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">17</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">479,186</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Leases
    (Concession Agreements, Program Contracts, and Contract Asset)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">309,210</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(27,329)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">30,556</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">312,437</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Leases
    (others)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">142,300</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">130,666</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(30,193)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">8,877</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">251,650</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Other</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">5,923</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">6</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(92)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(751)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">90</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">1</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">5,177</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 7pt"><I>TOTAL
    IN LOCAL CURRENCY</I></FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">16,790,459</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">130,666</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">2,948,335</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(7,319)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">54,036</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">11,918</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(443,981)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(553,139)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">316,055</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">142,326</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">3,859</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">19,393,215</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 7pt"><B><I>FOREIGN
    CURRENCY</I></B></FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IDBs</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">819,455</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">26,441</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(2,457)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(25,359)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">13,639</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">298</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">832,017</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IBRD</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">515,015</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(1,321)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">16,589</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(16,507)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(15,133)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">10,076</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">3</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">139</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">508,861</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">JICA</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">1,411,421</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(49,365)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(10,651)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(66,395)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">5,005</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">148</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">51</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,290,214</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin: 1pt 2.85pt 1pt 0in"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><!-- Field: Rule-Page --><DIV STYLE="margin-top: 1pt; margin-bottom: 1pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 7pt"><I>TOTAL
    IN FOREIGN CURRENCY</I></FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">2,745,891</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(1,321)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(6,335)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(29,615)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(106,887)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">28,720</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">151</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">488</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">2,631,092</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.3pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt"><I>Total</I></FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">19,536,350</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">130,666</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">2,948,335</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">(8,640)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">47,701</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">11,918</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">(473,596)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">(660,026)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">344,775</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">142,477</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">4,347</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">22,024,307</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>


<!-- Field: Page; Sequence: 75 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->73<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD COLSPAN="12" STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 26%; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 6%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center"><B>December </B></P>
    <P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center"><B>31, </B></P>
    <P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center"><B>2022</B></P>
</DIV></TD>
    <TD STYLE="width: 7%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Addition
    (lease)</B></P></TD>
    <TD STYLE="width: 6%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Funding</B></P></TD>
    <TD STYLE="width: 5%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Borrowing
    costs</B></P></TD>
    <TD STYLE="width: 6%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Inflation
    adjustment and exchange rate changes</B></P></TD>
    <TD STYLE="width: 7%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Inflation
    adjustment / exchange rate change and incorporated interest- Capitalized</B></P></TD>
    <TD STYLE="width: 6%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Interest
    paid</B></P></TD>
    <TD STYLE="width: 7%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Amortization</B></P></TD>
    <TD STYLE="width: 7%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Accrued
    interest</B></P></TD>
    <TD STYLE="width: 6%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Provision
    for interest and fees - Capitalized</B></P></TD>
    <TD STYLE="width: 5%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Expenses
    with borrowing costs </B></P></TD>
    <TD STYLE="width: 6%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center"><B>March </B></P>
    <P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center"><B>31, </B></P>
    <P STYLE="font: 6.5pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: center"><B>2023</B></P>
</DIV></TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 7pt"><B><I>LOCAL
    CURRENCY</I></B></FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Debentures</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">8,166,366</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(516)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">60,883</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">5,463</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(206,330)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(363,123)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">162,197</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">46,336</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2,859</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">7,874,135</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Brazilian
    Federal Savings Bank</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">1,526,185</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">50,852</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">6,250</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,718</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(29,853)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(27,891)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">23,539</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">6,393</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,557,193</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">BNDES</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">1,380,993</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">3,354</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">984</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(25,753)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(61,940)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">19,891</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">5,670</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">65</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,323,264</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IDB
    2202</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">2,450,550</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(165,514)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(90,674)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">26,253</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">58,942</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">239</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">2,279,796</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IDB
    INVEST</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">943,619</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(71,521)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(18,670)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">22,661</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">12,244</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">166</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">888,499</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IFC</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">774,525</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">29,484</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">228</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">804,237</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IDB
    INVEST 2022</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">469,327</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">18,405</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">64</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">487,796</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Leases
    (Concession Agreements, Program Contracts, and Contract Asset)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">357,844</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(13,603)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(10,873)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">13,603</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">346,971</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Leases
    (others)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">101,374</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">320</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(4,523)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(20,389)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">9,047</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">85,829</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">Other</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">12,130</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">3,629</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">22</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(161)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(1,581)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">160</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">2</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">14,201</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 7pt"><I>TOTAL
    IN LOCAL CURRENCY</I></FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">16,182,913</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">320</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">54,481</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(516)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">70,509</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">8,165</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(517,258)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(595,141)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">295,756</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">159,071</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">3,621</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">15,661,921</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 7pt"><B><I>FOREIGN
    CURRENCY</I></B></FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IDBs</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">532,693</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">50,342</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(15,365)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(2,474)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(26,343)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">5,062</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">237</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">544,152</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IBRD</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">399,762</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">18,892</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(1,588)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(10,585)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(10,061)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(16,014)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">8,691</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">56</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">106</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">389,259</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">JICA</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 0.2pt; text-align: right"><FONT STYLE="font-size: 8pt">1,803,109</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(56,819)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(14,057)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">(78,741)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">6,635</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">289</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">51</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 8pt">1,660,467</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt">IDB
    1983AB</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">40,194</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(1,056)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">661</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">221</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">104</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">40,124</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.2pt; padding-left: 3.5pt"><FONT STYLE="font-size: 7pt"><I>TOTAL
    IN FOREIGN CURRENCY</I></FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">2,775,758</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">69,234</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(1,588)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(83,825)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(26,592)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">(121,098)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">21,049</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">566</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">498</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.2pt; text-align: right; border-bottom: Black 0.5pt solid">2,634,002</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 0.3pt; padding-left: 3.5pt"><FONT STYLE="font-size: 8pt"><I>Total</I></FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">18,958,671</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">320</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">123,715</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">(2,104)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">(13,316)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">8,165</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">(543,850)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">(716,239)</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">316,805</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">159,637</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">4,119</P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 0.3pt; text-align: right; border-bottom: Black 1.5pt double">18,295,923</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0"><B>&nbsp;</B></P>


<!-- Field: Page; Sequence: 76 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->74<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 28.3pt"></TD><TD STYLE="width: 28.4pt"><FONT STYLE="font-size: 10pt"><B>(a)</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Main
                                            events in the three-month period ended March 31, 2024</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify"><B>Debentures</B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">As of March 05, 2024, the Company raised
R$ 2,940.5 billion from the 31st issue of simple, unsecured debentures, not convertible into shares, in three series, with the following
characteristics:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 16%; border: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 21%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%"><FONT STYLE="font-size: 10pt"><B>Value</B></FONT></TD>
    <TD STYLE="width: 35%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%"><FONT STYLE="font-size: 10pt"><B>Rate</B></FONT></TD>
    <TD STYLE="width: 28%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%"><FONT STYLE="font-size: 10pt"><B>Maturity</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 10pt">Series
    1</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 10pt">507,000</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 10pt">CDI
    + 0.49% p.a.</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%"><FONT STYLE="font-size: 10pt">2029</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 10pt">Series
    2</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 10pt">1,734,467</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 10pt">CDI
    + 1.10% p.a.</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%"><FONT STYLE="font-size: 10pt">2031</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 10pt">Series
    3</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 10pt">699,011</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 10pt">CDI
    + 1.31% p.a.</FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%"><FONT STYLE="font-size: 10pt">2034</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 10pt"><B>Total</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 10pt"><B>2,940,478</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding-right: 5.4pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 9.5pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 6pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 35.4pt"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-family: Symbol; font-size: 10pt">&#183;</FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt">The
                                            covenants agreed upon for the 31st issue are: </FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.35pt 6pt 85.05pt; text-align: justify">Calculated every quarter, when disclosing
the quarterly information or annual financial statements:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.35pt 6pt 85.05pt; text-align: justify">- Net debt/adjusted EBITDA lower
than or equal to 3.50;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.35pt 6pt 85.05pt; text-align: justify">- Adjusted EBITDA/financial expenses
equal to or higher than 1.5;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.35pt 6pt 85.05pt; text-align: justify">Failure to comply with the financial
indices above for at least two consecutive quarters, or for two non-consecutive quarters within twelve months (in which case the 30-day
cure period does not apply), constitutes a default event that may lead to the early maturity of the Debentures.- Disposal of operating
assets, termination of licenses, loss of concession or loss of the Company&rsquo;s ability to execute and operate public sanitation services
in areas of the S&atilde;o Paulo State which, individually or jointly during the term of the agreement, lead to a reduction of the Company&rsquo;s
net sales and/or service revenue of more than twenty- five percent (25%). The above limit will be calculated every quarter, taking into
consideration the Company&rsquo;s net operating income during the twelve (12) months before the end of each quarter and using the financial
information disclosed by the Company. Failure to comply with the limit above constitutes a default event that may lead to the early maturity
of the Debentures.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.35pt 6pt 85.05pt; text-align: justify">The contract has a cross acceleration
clause, i.e. the early maturity of any of the Company&rsquo;s debts, in an individual or aggregate amount equal to or higher than R$
198 million, adjusted by the IPCA inflation index as of the issue date, constitutes a default event and may result in the early maturity
of the Debentures.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.35pt 6pt 56.7pt; text-align: justify">The proceeds from the issue will
be used to refinance financial commitments falling due in 2024 and to recompose and reinforce the cash position. The Debentures are characterized
as &ldquo;ESG bonds for the use of sustainable and blue resources&rdquo;, based on the Company&rsquo;s commitment to allocate the equivalent
amount in projects described in the Sustainable Finance Framework.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 28.3pt"></TD><TD STYLE="width: 28.4pt"><FONT STYLE="font-size: 10pt"><B>(b)</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Lease</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">The Company has lease agreements signed
as Assets Lease. During the construction period, work costs are capitalized to contract assets and the lease amount is recorded in the
same proportion.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">After startup, the lease payment period
starts (240 monthly installments), and the amount is periodically restated by the contracted price index.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">The amounts payable for the right of
use of assets are also recorded in this line. See Note 14 (f).</P>


<!-- Field: Page; Sequence: 77 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->75<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 9.5pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 28.3pt"></TD><TD STYLE="width: 28.4pt"><FONT STYLE="font-size: 10pt"><B>(c)</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Covenants</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">The table below shows the most restrictive
covenants ratios as of March 31, 2024.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 56%; padding-right: 26.5pt; padding-left: 56.7pt; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 44%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Covenants</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 26.5pt; padding-bottom: 1pt; padding-left: 1.8pt"><FONT STYLE="font-size: 9pt">Adjusted EBITDA / Adjusted
    Financial Expenses</FONT></TD>
    <TD STYLE="padding-right: -7pt; padding-bottom: 1pt; padding-left: 1.7pt; font-size: 9.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Equal
    to or higher than 2.80</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 26.5pt; padding-bottom: 1pt; padding-left: 1.8pt"><FONT STYLE="font-size: 9pt">EBITDA / Financial Expenses
    Paid</FONT></TD>
    <TD STYLE="padding-right: -7pt; padding-bottom: 1pt; padding-left: 1.7pt; font-size: 9.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Equal
    to or higher than 2.35</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 26.5pt; padding-bottom: 1pt; padding-left: 1.8pt"><FONT STYLE="font-size: 9pt">Adjusted Net Debt / Adjusted
    EBITDA</FONT></TD>
    <TD STYLE="padding-right: -7pt; padding-bottom: 1pt; padding-left: 1.7pt; font-size: 9.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Equal
    to or lower than 3.80</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 26.5pt; padding-bottom: 1pt; padding-left: 1.8pt"><FONT STYLE="font-size: 9pt">Net Debt / Adjusted EBITDA</FONT></TD>
    <TD STYLE="padding-right: -7pt; padding-bottom: 1pt; padding-left: 1.7pt; font-size: 9.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Equal
    to or lower than 3.50</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 26.5pt; padding-bottom: 1pt; padding-left: 1.8pt"><FONT STYLE="font-size: 9pt">Other Onerous Debt <SUP>(1)
    </SUP>/ Adjusted EBITDA</FONT></TD>
    <TD STYLE="padding-right: -7pt; padding-bottom: 1pt; padding-left: 1.7pt; font-size: 9.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Equal
    to or lower than 1.30</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 26.5pt; padding-bottom: 1pt; padding-left: 1.8pt"><FONT STYLE="font-size: 9pt">Adjusted Current Ratio</FONT></TD>
    <TD STYLE="padding-right: 26.5pt; padding-bottom: 1pt; padding-left: 1.7pt; font-size: 9.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Higher
    than 1.00</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD COLSPAN="2" STYLE="padding: 6pt 1.45pt 1pt 1.7pt; font-size: 9.5pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 8pt">(1)
    The contractual definition of &ldquo;Other Onerous Debts&rdquo; corresponds to the sum of pension plan obligations and healthcare
    plan, installment payments of tax debts, and installment payments of debts with the electricity supplier.</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">As of March 31, 2024, and December 31,
2023, the Company met the requirements set forth by its borrowings and financing agreements.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 28.3pt"></TD><TD STYLE="width: 28.4pt"><FONT STYLE="font-size: 10pt"><B>(d)</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Borrowings
                                            and financing &ndash; Credit limited</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 72%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B> </B></P></TD>
    <TD STYLE="width: 28%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Agent</B></P></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 26.5pt; padding-bottom: 1pt; padding-left: 56.7pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-bottom: 1pt; padding-left: 3.5pt; text-align: center; line-height: 110%"><FONT STYLE="font-size: 9pt">(in millions
    of reais (*))</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 26.5pt; padding-bottom: 1pt; padding-left: 5.8pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Brazilian
    Federal Savings Bank</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">926</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 26.5pt; padding-bottom: 1pt; padding-left: 5.8pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Brazilian
    Development Bank (BNDES) </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">30</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 26.5pt; padding-bottom: 1pt; padding-left: 5.8pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Inter-American
    Development Bank (IDB)</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">739</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 26.5pt; padding-bottom: 1pt; padding-left: 5.8pt; line-height: 110%"><FONT STYLE="font-size: 9pt">International
    Bank for Reconstruction and Development (IBRD) </FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,032</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 26.5pt; padding-bottom: 1pt; padding-left: 5.8pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">7</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 26.5pt; padding-bottom: 1pt; padding-left: 5.8pt; line-height: 110%"><FONT STYLE="font-size: 9pt">TOTAL</FONT></TD>
    <TD STYLE="padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">2,734</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">(*) Brazilian Central Bank&rsquo;s exchange
rate as of March 31, 2024 (US$ 1.00 = R$ 4.9962; &yen; 1.00 = R$ 0.03301).</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">Financing resources contracted have
specific purposes and are released for the execution of their respective investments, according to the progress of the works.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 56.7pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 21.3pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>17</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Taxes
                                            and contributions</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 56.7pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 35.4pt"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt"><B>(a)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Current
                                            assets</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 56.7pt; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 56.7pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 58%; padding-bottom: 1pt; padding-left: 56.7pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 19%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 23%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 10pt/110% Frutiger Light; padding-bottom: 1pt; padding-left: 7.3pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt"><B>Recoverable
    taxes</B></FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 10pt/110% Frutiger Light; padding-bottom: 1pt; padding-left: 7.3pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">Income
    tax and social contribution</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">272,364</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">462,642</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 7.3pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Withheld
    income tax (IRRF) on financial investments</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">53,572</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">29,953</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 7.3pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Other
    federal taxes</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,222</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,050</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 7.3pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">328,158</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">494,645</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 56.7pt">&nbsp;</P>

<!-- Field: Page; Sequence: 78 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->76<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 8.8pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 52%; padding-bottom: 1pt; padding-left: 56.7pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 25%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 23%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 10pt/110% Frutiger Light; padding-bottom: 1pt; padding-left: 8.8pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt"><B>Recoverable
    taxes</B></FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>

<TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 52%; padding-bottom: 1pt; padding-left: 8.8pt; font: 10pt/110% Frutiger Light; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">Income
    tax and social contribution</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 25%; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">272,364</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; width: 23%; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">462,642</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 8.8pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Withheld
    income tax (IRRF) on financial investments</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">53,587</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">29,955</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 8.8pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Other
    federal taxes</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,222</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,050</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 8.8pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">328,173</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">494,647</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 56.7pt">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 56.7pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 35.4pt"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt"><B>(b)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Current
                                            liabilities</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 56.7pt; text-align: justify; text-indent: -20.65pt"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 9.3pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 51%; padding-bottom: 1pt; padding-left: 56.7pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 22%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 27%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 9.3pt; line-height: 110%"><FONT STYLE="font-size: 9pt"><B>Taxes
    and contributions payable</B></FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 9.3pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Income
    tax and social contribution</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">388,734</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">205,587</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 9.3pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Cofins
    and Pasep</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">136,927</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">141,576</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 9.3pt; line-height: 110%"><FONT STYLE="font-size: 9pt">INSS (social
    security contribution)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">42,136</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">44,556</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 9.3pt; line-height: 110%"><FONT STYLE="font-size: 9pt">IRRF (withholding
    income tax)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">5,512</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">64,770</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 9.3pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">44,614</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">54,979</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 9.3pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">617,923</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">511,468</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 56.7pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 56.7pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 51%; padding-bottom: 1pt; padding-left: 56.7pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 22%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 27%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 0.15in; line-height: 110%"><FONT STYLE="font-size: 9pt"><B>Taxes
    and contributions payable</B></FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 0.15in; line-height: 110%"><FONT STYLE="font-size: 9pt">Income
    tax and social contribution</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">389,712</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">205,964</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 0.15in; line-height: 110%"><FONT STYLE="font-size: 9pt">Cofins
    and Pasep</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">137,048</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">141,703</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 0.15in; line-height: 110%"><FONT STYLE="font-size: 9pt">INSS (social
    security contribution)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">42,136</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">44,556</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 0.15in; line-height: 110%"><FONT STYLE="font-size: 9pt">IRRF (withholding
    income tax)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">5,512</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">64,770</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 0.15in; line-height: 110%"><FONT STYLE="font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">44,620</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">54,979</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; padding-left: 0.15in; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">619,028</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">511,972</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 56.7pt">&nbsp;</P>


<!-- Field: Page; Sequence: 79 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->77<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0 0 0 56.7pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 21.3pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>18</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Deferred
                                            taxes and contributions</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 56.7pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 35.4pt"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt"><B>(a)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Statement
                                            of financial position details</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 52%; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 24%; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 24%; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt"><B>Deferred
    income tax assets </B></FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Provisions</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; text-indent: -2.85pt"><FONT STYLE="font-size: 9pt">678,996</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; text-indent: -2.85pt"><FONT STYLE="font-size: 9pt">666,131</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 10pt Frutiger Light; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">Pension
    plan obligations - G1</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; text-indent: -2.85pt"><FONT STYLE="font-size: 9pt">132,543</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">135,231</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Donations
    of underlying assets on concession agreements</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; text-indent: -2.85pt"><FONT STYLE="font-size: 9pt">44,594</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">45,140</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Allowance
    for doubtful accounts</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">190,726</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">182,519</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">376,281</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">382,767</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total
    deferred tax asset</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,423,140</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,411,788</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; text-indent: -2.85pt">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt"><B>Deferred
    income tax liabilities</B></FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; text-indent: -2.85pt">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Temporary
    difference on concession of intangible asset</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; text-indent: -2.85pt"><FONT STYLE="font-size: 9pt">(325,461)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(329,060)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Capitalization
    of borrowing costs</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; text-indent: -2.85pt"><FONT STYLE="font-size: 9pt">(466,374)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(465,510)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Profit
    on supply to government entities</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; text-indent: -2.85pt"><FONT STYLE="font-size: 9pt">(347,379)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(348,514)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Actuarial
    gain &ndash; G1 Plan </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; text-indent: -2.85pt"><FONT STYLE="font-size: 9pt">(121,425)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(121,425)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Construction
    margin</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; text-indent: -2.85pt"><FONT STYLE="font-size: 9pt">(39,893)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(40,579)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Borrowing
    costs</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt 7.1pt; text-align: right; text-indent: -7.1pt; border-bottom: Black 0.5pt solid">(7,323)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(8,624)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Total
    deferred tax liabilities</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt 7.1pt; text-align: right; text-indent: -7.1pt; border-bottom: Black 0.5pt solid">(1,307,855)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,313,712)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Deferred
    tax asset, net</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">115,285</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">98,076</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 35.4pt"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt"><B>(b)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Changes</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 49%; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt"><B>Deferred
    income tax assets</B></FONT></TD>
    <TD STYLE="width: 17%; padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>December 31,</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2023</B></P>
</DIV></TD>
    <TD STYLE="width: 17%; padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>Net</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>change</B></P>
</DIV></TD>
    <TD STYLE="width: 17%; padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>March 31,</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Provisions</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">666,131</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">12,865</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%; text-indent: -2.85pt"><FONT STYLE="font-size: 9pt">678,996</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Pension plan obligations -
    G1</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">135,231</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(2,688)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">132,543</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Donations of underlying assets
    on concession agreements</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">45,140</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(546)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">44,594</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Allowance for doubtful accounts</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">182,519</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">8,207</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">190,726</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">382,767</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(6,486)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">376,281</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,411,788</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">11,352</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,423,140</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt"><B>Deferred
    income tax liabilities</B></FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Temporary difference on concession
    of intangible asset</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(329,060)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3,599</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(325,461)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Capitalization of borrowing
    costs</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(465,510)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(864)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(466,374)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Profit on supply to government
    entities</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(348,514)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,135</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(347,379)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Actuarial gain &ndash; G1</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(121,425)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">-</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(121,425)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Construction margin</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(40,579)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">686</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(39,893)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Borrowing costs</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(8,624)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,301</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(7,323)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,313,712)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">5,857</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,307,855)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Deferred
    tax asset, net</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">98,076</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">17,209</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">115,285</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>


<!-- Field: Page; Sequence: 80 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->78<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 49%; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt"><B>Deferred
    income tax assets</B></FONT></TD>
    <TD STYLE="width: 17%; padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>December 31,</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2022</B></P>
</DIV></TD>
    <TD STYLE="width: 17%; padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>Net</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>change</B></P>
</DIV></TD>
    <TD STYLE="width: 17%; padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>March 31,</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2023</B></P>
</DIV></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Provisions</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">560,404</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">12,715</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%; text-indent: -2.85pt"><FONT STYLE="font-size: 9pt">573,119</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Pension plan obligations -
    G1</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">141,606</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(4,774)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">136,832</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Donations of underlying assets
    on concession agreements</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">46,088</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(288)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">45,800</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Allowance for doubtful accounts</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">199,363</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(6,693)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">192,670</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Other</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">171,798</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(2,221)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">169,577</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,119,259</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,261)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,117,998</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt"><B>Deferred
    income tax liabilities</B></FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Temporary difference on concession
    of intangible asset</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(353,817)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3,498</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(350,319)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Capitalization of borrowing
    costs</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(457,669)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(7,785)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(465,454)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Profit on supply to government
    entities</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(346,650)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,390
    </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(345,260)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Actuarial gain &ndash; G1</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(93,561)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">-</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(93,561)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Construction margin</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(43,323)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">686</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(42,637)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-bottom: 1pt; padding-left: 2.85pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Borrowing costs</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(13,517)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,227</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(12,290)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,308,537)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(984)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,309,521)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Deferred
    tax liability, net</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(189,278)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(2,245)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(191,523)</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 63.8pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 35.4pt"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt"><B>(c)</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Reconciliation
                                            of the effective tax rate</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">The amounts recorded as income tax and
social contribution expenses in the financial statements are reconciled to the statutory rates, as shown below:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 40%; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center; line-height: 110%; font-family: Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 20%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 20%; padding-left: 2.85pt"><!-- Field: Rule-Page --><DIV STYLE="margin: 1pt 2.85pt 1pt 5.65pt"><DIV STYLE="font-size: 1pt; border-top: Black 0.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page --></TD>
    <TD STYLE="padding-right: 2.85pt; width: 20%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center; line-height: 110%; font-family: Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 5.65pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 5.65pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2023</B></P>
</DIV></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 5.65pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2023</B></P>
</DIV></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Profit
    before income taxes</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,322,882</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,132,945</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,323,860</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Statutory
    rate</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">34%</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">34%</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">34%</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">&nbsp;</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Estimated
    expense at statutory rate</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(449,780)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(385,201)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(450,112)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">Permanent
    differences:</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%; font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">&#9;Provision
    Law 4,819/1958 &ndash; G0 (i)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(6,555)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(10,772)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(6,555)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%; font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">&#9;Donations</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(1,093)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(1,065)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(1,093)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%; font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">&#9;Agreement
    with AAPS</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(55,212)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">-</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(55,212)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%; font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">&#9;Other
    differences</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">13,053</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">11,305</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">12,407</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%; font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">&nbsp;</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%; font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">Income
    tax and social contribution</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(499,587)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(385,733)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(500,565)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%; font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">&nbsp;</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%; font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">Current
    income tax and social contribution</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(516,796)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(383,488)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(517,774)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%; font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">Deferred
    income tax and social contribution</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">17,209</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(2,245)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">17,209</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; line-height: 110%; font-family: Times New Roman, Times, Serif"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">Effective
    rate</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">38%</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">34%</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">38%</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 48.95pt; text-indent: 14.85pt">(i)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Permanent
difference related to the provision for the actuarial liability. See Note 21 (ii) and (v).</P>


<!-- Field: Page; Sequence: 81 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->79<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 48.95pt; text-indent: 14.85pt">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 21.3pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>19</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Provisions</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 35.4pt"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt"><B>(a)</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Lawsuits
                                            and proceedings that resulted in provisions</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 54.8pt"></TD><TD STYLE="width: 23.2pt"><FONT STYLE="font-size: 10pt"><B>(I)</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Statement
                                            of financial position details</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">The Company is a party to several legal
claims and administrative proceedings arising from the normal course of business, including civil, tax, labor, and environmental matters.
Management recognizes provisions consistently with the recognition and measurement criteria established in Note 3.16 to the Annual Financial
Statements as of December 31, 2023. The terms and payment amounts are defined based on the outcome of these lawsuits.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="7" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March
    31, 2024</B></P></TD>
    <TD STYLE="padding-left: 2.85pt; padding-right: 2.85pt; padding-bottom: 1pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 33%"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 2.85pt 1pt 0; text-align: center"><B>&nbsp;</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 2.85pt 1pt 0; text-align: center"><B>&nbsp;</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 11%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Provisions</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 11%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Escrow
    deposits</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 11%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Provisions
    net of deposits</B></P></TD>
    <TD STYLE="padding-left: 2.85pt; width: 1%; padding-right: 2.85pt; padding-bottom: 1pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 11%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Provisions</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 11%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Escrow
    deposits</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 11%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Provisions
    net of deposits</B></P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Customer
    claims (i)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">169,058</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">(6,003)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">163,055</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">175,255</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-bottom: 1pt; text-align: right; line-height: 110%; padding-left: 2.85pt"><FONT STYLE="font-size: 9pt">(6,060)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">169,195</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Supplier
    claims (ii)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">338,580</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">(93,833)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">244,747</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">334,273</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">(90,973)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">243,300</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Other
    civil claims (iii)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">140,447</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">(1,301)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">139,146</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">128,036</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">(1,229)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">126,807</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Tax claims
    (iv)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">114,215</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">(18,577)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">95,638</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">101,770</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">(18,223)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">83,547</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Labor
    claims (v)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">723,968</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">(14,077)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">709,891</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">727,133</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">(16,235)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">710,898</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Environmental
    claims (vi)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">510,781</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(57)</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">510,724</P></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">492,740</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(55)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">492,685</P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,997,049</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(133,848)</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,863,201</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,959,207</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(132,775)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,826,432</P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Current</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">1,085,976</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">-</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">1,085,976</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,064,367</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">-</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,064,367</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Noncurrent</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">911,073</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">(133,848)</FONT></TD>
    <TD STYLE="font: 12pt/110% Times New Roman, Times, Serif; white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">777,225</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">894,840</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(132,775)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">762,065</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 33.5pt"></TD><TD STYLE="width: 23.2pt"><FONT STYLE="font-size: 10pt"><B>(II)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Changes</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="6" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 29%; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 12%; padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>December </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>31, </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2023</B></P>
</DIV></TD>
    <TD STYLE="width: 12%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Additional
    provisions</B></P></TD>
    <TD STYLE="width: 12%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Interest
    and inflation adjustment</B></P></TD>
    <TD STYLE="width: 11%; padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Use of
    the accrual</B></P></TD>
    <TD STYLE="width: 12%; padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>Amounts not used</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>(reversal)</B></P>
</DIV></TD>
    <TD STYLE="width: 12%; padding-right: 2.85pt; padding-left: 2.85pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>March </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>31, </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Customer
    claims (i)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">175,255</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">965</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">5,043</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(12,189)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(16)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">169,058</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Supplier
    claims (ii)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">334,273</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">2,027</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">8,957</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(2,741)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(3,936)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">338,580</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Other
    civil claims (iii)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">128,036</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">23,512</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">5,480</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(15,564)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(1,017)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">140,447</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Tax claims
    (iv)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">101,770</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">11,967</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">4,805</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(101)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(4,226)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">114,215</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Labor
    claims (v)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">727,133</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">18,517</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">13,098</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(16,498)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(18,282)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">723,968</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Environmental
    claims (vi)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">492,740</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">10,667</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">21,650</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(14,276)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">510,781</P></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Subtotal</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,959,207</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">67,655</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">59,033</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(47,093)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(41,753)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,997,049</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Escrow
    deposits</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(132,775)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,899)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(2,580)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,816</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,590</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(133,848)</P></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,826,432</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">65,756</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">56,453</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(45,277)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(40,163)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,863,201</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>


<!-- Field: Page; Sequence: 82 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->80<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="6" STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 29%; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 12%; padding-right: 5.4pt; padding-left: 5.4pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>December 31,</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2022</B></P>
</DIV></TD>
    <TD STYLE="width: 12%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Additional
    provisions</B></P></TD>
    <TD STYLE="width: 12%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Interest
    and inflation adjustment</B></P></TD>
    <TD STYLE="width: 11%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Use of
    the accrual</B></P></TD>
    <TD STYLE="width: 12%; padding-right: 5.4pt; padding-left: 5.4pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>Amounts not used</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>(reversal)</B></P>
</DIV></TD>
    <TD STYLE="width: 12%; padding-right: 5.4pt; padding-left: 5.4pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>March 31, </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2023</B></P>
</DIV></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Customer
    claims (i)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">151,023</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,918</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3,790</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(21,540)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(1,158)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">134,033</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Supplier
    claims (ii)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">257,080</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,992</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">5,552</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(1,042)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">-</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">263,582</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Other
    civil claims (iii)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">99,462</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">5,701</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">7,154</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(3,478)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(3,793)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">105,046</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Tax claims
    (iv)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">79,532</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">11,039</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,658</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(7)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(455)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">91,767</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Labor
    claims (v)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">654,277</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">9,894</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">13,486</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(5,799)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(14,450)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">657,408</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Environmental
    claims (vi)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">406,872</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">22,400</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">18,655</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(14,117)</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">433,810</P></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Subtotal</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,648,246</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">52,944</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">50,295</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(31,866)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(33,973)</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,685,646</FONT></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Escrow
    deposits</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(37,462)</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(271)</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(696)</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">533</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,461</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(36,435)</P></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,610,784</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">52,673</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">49,599</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(31,333)</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(32,512)</P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,649,211</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 35.4pt"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt"><B>(b)</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Lawsuits
                                            deemed as contingent liabilities</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">The Company is a party to lawsuits and
administrative proceedings relating to environmental, tax, civil, and labor claims, which are assessed as contingent liabilities in the
financial statements, since it either does not expect outflows to be required or the amount of the obligations cannot be reliably measured.
Contingent liabilities, net of deposits, are represented as follows:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; white-space: nowrap; vertical-align: bottom; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.75pt solid"><B>Parent
    Company and Consolidated</B></P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; width: 46%; padding-bottom: 1pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; vertical-align: bottom; width: 27%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.75pt solid"><B>March
    31, 2024</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; vertical-align: bottom; width: 27%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.75pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Customer claims (i)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">161,784</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">158,584</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Supplier claims (ii)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,005,785</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">968,752</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Other civil claims (iii)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">644,852</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">695,097</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Tax claims (iv)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,156,487</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,067,350</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Labor claims (v)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3,332,929</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">3,093,735</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Environmental claims (vi)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.75pt solid">4,316,366</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.75pt solid">4,158,504</P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 2.25pt double">10,618,203</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 2.25pt double">10,142,022</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 35.4pt"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt"><B>(c)</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Explanation
                                            of the nature of main classes of lawsuits</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 56.15pt"></TD><TD STYLE="width: 43.1pt"><FONT STYLE="font-size: 10pt"><B>(i)</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Customer
                                            claims </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">Refer mainly to lawsuits from customers
claiming that their tariffs should be equal to those of other consumer categories, lawsuits for reduction of sewage tariff due to system
losses, consequently requiring the refund of amounts charged by the Company, and lawsuits for reduction of tariff for being eligible
to the Social Welfare Entity category.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 56.15pt"></TD><TD STYLE="width: 43.1pt"><FONT STYLE="font-size: 10pt"><B>(ii)</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Supplier
                                            claims</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">Include lawsuits filed by some suppliers
alleging underpayment of inflation adjustments and economic and financial imbalance of the agreements, and are in progress at different
courts.</P>


<!-- Field: Page; Sequence: 83 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->81<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 56.15pt"></TD><TD STYLE="width: 43.1pt"><FONT STYLE="font-size: 10pt"><B>(iii)</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Other
                                            civil claims</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">Refer mainly to indemnities for property
damage, pain and suffering, and loss of profits allegedly caused to third parties, such as vehicle accidents, claims, and challenges
on the methodology to collect tariffs, among others, filed at different court levels.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify; text-indent: 0in"><FONT STYLE="font-size: 10pt"><B>(iv)</B></FONT><B><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 7pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</FONT><FONT STYLE="font-size: 10pt">Tax claims</FONT></B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">Tax claims refer mainly to tax collections
and fines in general challenged due to disagreements regarding notification or differences in the interpretation of legislation by the
Company's Management.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify; text-indent: 0in"><FONT STYLE="font-size: 10pt"><B>(v)</B></FONT><B><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 7pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</FONT> <FONT STYLE="font-size: 10pt">Labor claims</FONT></B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">The Company is a party to several labor
lawsuits, involving issues such as overtime, shift schedule, health hazard premium and hazardous duty premium, prior notice, change of
function, salary equalization, service outsourcing, and others, which are at various court levels.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify; text-indent: 0in"><FONT STYLE="font-size: 10pt"><B>(vi)</B></FONT><B><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 7pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</FONT><FONT STYLE="font-size: 10pt">Environmental claims</FONT></B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">These refer to several administrative
proceedings and lawsuits filed by government entities, including Companhia Ambiental do Estado de S&atilde;o Paulo (CETESB) and the Public
Prosecution Office of the S&atilde;o Paulo State, which aim at certain obligations to do and not to do, with the provision of fines for
non-compliance and imposition of compensation for environmental damages allegedly caused by the Company.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">The main objects in which the Company
is involved are: a) blame SABESP for discharging or releasing sewage without proper treatment; b) invest in the water and sewage treatment
system of the municipality, under penalty of paying a fine; c) pay compensation for environmental damages; amongst others.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 35.4pt"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt"><B>(d)</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Guarantee
                                            insurance </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">As of May 24, 2023, the Company executed
an agreement effective for one year for the issue of policies under several types of guarantee insurance. The limit that can be used
is R$ 600 million. The guarantee insurance for escrow deposit is used in legal claims, where instead of immediately disbursing cash,
the Company uses the guarantee provided by the insurance until the end of these proceedings, limited to up to five years. As of March
31, 2024, R$ 199.7 million was available for use.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 21.3pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>20</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Labor
                                            liabilities and pension plan obligations</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 52%; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 24%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31, 2024</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 24%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 9pt">Salaries
    and payroll charges</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 9pt">37,337</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 9pt">69,885</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 9pt">Provision
    for vacation</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 9pt">245,218</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 9pt">256,415</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 9pt">Provision
    for Christmas bonus</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 9pt">21,325</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 9pt">-</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 9pt">Healthcare
    plan (i)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 9pt">117,551</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 9pt">86,147</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 9pt">Provision
    for profit sharing (ii)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 9pt">122,353</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 9pt">97,514</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 9pt">Incentivized
    Dismissal Program - IDP (iii)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 9pt">192,626</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 9pt">290,202</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 9pt">Consent
    Decree (TAC)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 9pt">5,161</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right"><FONT STYLE="font-size: 9pt">6,093</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 9pt">Knowledge
    Retention Program (KRP)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,016</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,184</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">742,587</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">807,440</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>


<!-- Field: Page; Sequence: 84 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->82<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 56.7pt; text-indent: 0in"><B>(i) Healthcare plan</B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 63.8pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">Benefits granted are paid after the
event, free of choice, and are sponsored by the contributions of SABESP and the employees. In the first quarter of 2024, the Company
contributed 8.7%, on average, of gross payroll, totaling R$ 66,605 (9.8% in the first quarter of 2023, totaling R$ 75,505).</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">The agreement entered into between SABESP
and AAPS (Sabesp&rsquo;s Association of Retirees and Pensioners) regarding financial compensation for 60 months for the VIVEST health
plan operator regarding the migration of retirees, former employees, pensioners, and dependents between health plans is recorded in this
line.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">Until the ratification of the agreement,
SABESP was responsible for transferring to VIVEST the amounts referring to deficits in the health plans of retirees, former employees,
pensioners, and dependents, and for ensuring that each individual reimbursed the Company for the deficit.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">In the first quarter of 2024, the Company
recognized the obligations related to the agreement, considering the entire population migrated or those in negotiations for migration,
with a total impact of R$&nbsp;162,388 on the period&rsquo;s result, under the general expenses line. Of this amount, R$&nbsp;10,237
was paid by March 31, 2024, of which R$&nbsp;31,206 was recorded under current liabilities and R$&nbsp;120,945 under noncurrent liabilities
in &ldquo;Other Obligations&rdquo;.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0 0 0 56.7pt; text-indent: 0in"><FONT STYLE="font-size: 10pt"><B>(ii)</B></FONT><B><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 7pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</FONT><FONT STYLE="font-size: 10pt">Provision for profit sharing</FONT></B></P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">Based on an agreement with the labor
union, the Profit Sharing Program corresponds to up to one month&rsquo;s salary for each employee, depending on the achievement of the
goals established, from January to December, and should be paid in the subsequent year.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-indent: 0in"><FONT STYLE="font-size: 10pt"><B>(iii)</B></FONT><B><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 7pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</FONT><FONT STYLE="font-size: 10pt">Incentivized Dismissal Program - IDP</FONT></B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">In June 2023, the Company implemented
the Incentivized Dismissal Program (PDI or Program) to pacifically reduce the workforce and provide gains in efficiency, increase of
competitiveness, and optimization of costs (further details in Note 21 to the Annual Financial Statements as of December, 31, 2023).</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 56.7pt; text-align: justify">As of March 31, 2024, R$&nbsp;250,054
was recorded due to the provision for compensation incentives for employees who joined the program, of which R$&nbsp;192,626 in current
liabilities and R$&nbsp;57,428 in noncurrent liabilities under &ldquo;Labor Obligations&rdquo;.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 56.7pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 56.7pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 21.3pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>21</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Pension
                                            plan obligations</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 56.7pt">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 56.7pt; text-align: justify">The Company has Post-Employment Benefit Plans
in the following modalities: Defined Benefit (BD) &ndash; G1 (i) and G0 (ii); and Defined Contribution (CD) &ndash; Sabesprev Mais (iii)
and VIVEST (iv), whereby only the latter is open for new adhesions. See the reconciliation of expenses with such plans in item (v).</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 56.7pt">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 56.7pt; text-align: justify"><B><U>Defined benefit plans</U></B></P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 56.7pt; text-align: justify"><B>Summary of pension plan obligations- Liabilities</B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company and Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 55%; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 15%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>G1 Plan</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>G0 Plan</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Total</B></P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Pension
    plan obligations as of December 31, 2023</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(44,249)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(2,098,622)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(2,142,871)</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">(Expenses)
    recognized in 2024</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(1,560)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(47,319)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(48,879)</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Payments
    made in 2024</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">10,096</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">50,424</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">60,520</P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Pension
    plan obligations as of March 31, 2024</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(35,713)</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(2,095,517)</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(2,131,230)</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>


<!-- Field: Page; Sequence: 85 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->83<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 55%; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 15%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>G1 Plan</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>G0 Plan</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 15%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Total</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Pension
    plan obligations as of December 31, 2022</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(148,116)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(2,002,075)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(2,150,191)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">(Expenses)
    / revenues recognized in 2023</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">4,384</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(56,305)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(51,921)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Payments
    made in 2023</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">10,124</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">48,200</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">58,324</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-bottom: 1pt; padding-left: 3.5pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Pension
    plan obligations as of March 31, 2023</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(133,608)</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(2,010,180)</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(2,143,788)</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 62.35pt"></TD><TD STYLE="width: 22.7pt"><B>(i)</B></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><B>G1
                                            Plan </B></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 85.05pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 85.05pt; text-align: justify">The defined benefit plan (&ldquo;G1
Plan&rdquo;) managed by SABESPREV receives similar contributions established in a plan of subsidy of actuarial study of SABESPREV, as
follows:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 85.05pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 67.2pt"></TD><TD STYLE="width: 17.85pt"><FONT STYLE="font-family: Symbol; font-size: 10pt">&#183;</FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt">0.99%
                                            of the portion of the salary of participation up to 20 salaries; and</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 3pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 67.2pt"></TD><TD STYLE="width: 17.85pt"><FONT STYLE="font-family: Symbol; font-size: 10pt">&#183;</FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt">8.39%
                                            of the surplus, if any, of the portion of the salary of participation over 20 salaries.</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 85.05pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 62.35pt"></TD><TD STYLE="width: 22.7pt"><B>(ii)</B></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><B>G0
                                            Plan </B></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 85.05pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 85.05pt; text-align: justify">According to State Law 4,819/1958,
employees who started providing services before May 1974 acquired a legal right to receive supplemental pension payments, which rights
are referred to as &quot;G0 Plan&quot;. The Company pays supplemental retirement and pension amounts on behalf of the S&atilde;o Paulo
State and seeks reimbursements of such amounts, which are recorded in the &ldquo;Balances with related parties&rdquo; line, limited to
the amounts considered virtually certain to be reimbursed by the S&atilde;o Paulo State.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 85.05pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 62.35pt"></TD><TD STYLE="width: 22.7pt"><B>(iii)</B></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><B>Sabesprev
                                            Mais Plan </B></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 85.05pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 85.05pt; text-align: justify">Managed by SABESPREV, the sponsor's
contributions correspond to the result obtained by applying a percentage of 100% to the basic contribution made by the participant.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 85.05pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 62.35pt"></TD><TD STYLE="width: 22.7pt"><B>(ii)</B></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><B>VIVEST
                                            Plan </B></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 85.05pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 85.05pt; text-align: justify">Managed by VIVEST, the sponsor's contributions
correspond to the result obtained by applying a percentage of 100% to the basic contribution made by the participant.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 56.7pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 62.35pt"></TD><TD STYLE="width: 22.7pt"><B>(v)</B></TD><TD STYLE="text-align: justify"><B>Reconciliation of expenditures
                                            with pension plan obligations </B></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 35.45pt; text-align: justify"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR>
    <TD STYLE="width: 42%; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="width: 29%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company and Consolidated</B></P></TD>
    <TD STYLE="width: 29%; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD></TR>
  <TR>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2024</B></P></TD>
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March 31,
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: justify; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">G1
    Plan (i)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,560</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(4,384)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">G0
    Plan (ii)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">47,319</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">56,305</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Sabesprev
    Mais Plan (iii)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">6,750</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">6,603</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">VIVEST
    Plan (iv)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">189</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">84</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Subtotal</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">55,818</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">58,608</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Capitalized</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(1,150)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(764)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Reimbursement
    of additional retirement and pension benefits paid (G0)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(28,040)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(24,622)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Other</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,508</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,441</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-bottom: 1pt; padding-left: 5.4pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Pension
    plan obligations (Note 27)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">28,136</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">34,663</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>


<!-- Field: Page; Sequence: 86 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->84<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 35.5pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>22</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Services
                                            payable</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 70.9pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 70.9pt; text-align: justify">This line records the balances payable, mainly
from services received from third parties, such as the supply of electric power, reading of hydrometers and delivery of water and sewage
bills, cleaning, surveillance and security services, collection, legal counsel services, audit, marketing, and advertising and consulting
services, among others. The amounts payable to the municipal governments related to transfers provided for in the concession agreements
are also recorded. The parent company&rsquo;s balances as of March 31, 2024, and December 31, 2023, were R$ 836,294 and R$ 749,226, respectively.
The consolidated balances as of March 31, 2024, and December 31, 2023, were R$ 838,703 and R$ 750,732, respectively.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 35.5pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>23</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Equity
                                            </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 70.9pt; text-align: justify"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 49.6pt"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt"><B>(a)</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt"><B>Share
                                            capital</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 70.9pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 70.9pt; text-align: justify">As of March 31, 2024, and December 31, 2023,
the authorized, subscribed, and paid-in capital, totaling R$ 15,000,000, was composed of 683,509,869 registered, book-entry common shares
with no par value, as follows:</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 4.8pt 8.5pt 2.4pt 42.55pt; text-align: center">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 4.8pt 8.5pt 2.4pt 42.55pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 4.8pt 0 2.4pt; text-align: center; border-bottom: Black 0.5pt solid"><B>March
    31, 2024</B></P></TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 4.8pt 0 2.4pt; text-align: center; border-bottom: Black 0.5pt solid"><B>December
    31, 2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 52%; padding-top: 4.8pt; padding-right: 8.5pt; padding-bottom: 2.4pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 15%; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 4.8pt 0 2.4pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Number
    of shares</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 9%; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 4.8pt 0 2.4pt; text-align: center; border-bottom: Black 0.5pt solid"><B>%</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 15%; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 4.8pt 0 2.4pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Number
    of shares</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 9%; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 4.8pt 0 2.4pt; text-align: center; border-bottom: Black 0.5pt solid"><B>%</B></P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 4.8pt; padding-right: 8.5pt; padding-bottom: 2.4pt; text-align: justify"><FONT STYLE="font-size: 9pt">&nbsp;S&atilde;o
    Paulo State </FONT></TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 9pt">343,506,664</FONT></TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 9pt">50.3</FONT></TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 9pt">343,506,664</FONT></TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 9pt">50.3</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 4.8pt; padding-right: 8.5pt; padding-bottom: 2.4pt; text-align: justify"><FONT STYLE="font-size: 9pt">&nbsp;Other
    shareholders </FONT></TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 4.8pt; padding-right: 8.5pt; padding-bottom: 2.4pt; text-align: justify"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;&nbsp;In
    Brazil <SUP>(1)</SUP></FONT></TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 9pt">266,922,203</FONT></TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 9pt">39.0</FONT></TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 9pt">257,339,417</FONT></TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 9pt">37.6</FONT></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-top: 4.8pt; padding-right: 8.5pt; padding-bottom: 2.4pt; text-align: justify"><FONT STYLE="font-size: 9pt">&nbsp;&nbsp;&nbsp;Abroad
    <SUP>(2) </SUP></FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 4.8pt 0 2.4pt; text-align: right; border-bottom: Black 0.5pt solid">73,081,002</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 4.8pt 0 2.4pt; text-align: right; border-bottom: Black 0.5pt solid">10.7</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 4.8pt 0 2.4pt; text-align: right; border-bottom: Black 0.5pt solid">82,663,788</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 4.8pt 0 2.4pt; text-align: right; border-bottom: Black 0.5pt solid">12.1</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 4.8pt; padding-right: 8.5pt; padding-bottom: 2.4pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 9pt"><IMG SRC="image_001.jpg" ALT="" STYLE="height: 0.6pt; width: 0.6pt"></FONT></TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right"><FONT STYLE="font-size: 9pt"><IMG SRC="image_001.jpg" ALT="" STYLE="height: 0.6pt; width: 0.6pt"></FONT></TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right">&nbsp;</TD>
    <TD STYLE="padding: 4.8pt 2.85pt 2.4pt; white-space: nowrap; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 4.8pt; padding-right: 8.5pt; padding-bottom: 2.4pt; text-align: justify"><FONT STYLE="font-size: 9pt">&nbsp;Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 4.8pt 0 2.4pt; text-align: right; border-bottom: Black 1.5pt double">683,509,869</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 4.8pt 0 2.4pt; text-align: right; border-bottom: Black 1.5pt double">100.0</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 4.8pt 0 2.4pt; text-align: right; border-bottom: Black 1.5pt double">683,509,869</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 4.8pt 0 2.4pt; text-align: right; border-bottom: Black 1.5pt double">100.0</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 1pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 48.2pt"></TD><TD STYLE="width: 22.7pt"><FONT STYLE="font-size: 10pt">(1)</FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt">As
                                            of March 31, 2024, the common shares traded in Brazil were held by 49,847 shareholders. It
                                            includes six shares held by Cia Paulista de Parcerias &ndash; CPP, a company controlled by
                                            the S&atilde;o Paulo State Government.</FONT></TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 1pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 48.2pt"></TD><TD STYLE="width: 22.7pt"><FONT STYLE="font-size: 10pt">(2)</FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt">Shares
                                            traded as American Depositary Receipts (ADR) on the New York Stock Exchange, through The
                                            Bank New York Mellon, the depositary bank of the Company&rsquo;s ADRs.</FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 42.5pt"></TD><TD STYLE="width: 21.3pt"><FONT STYLE="font-size: 10pt"><B>(b)</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Interest
                                            on capital </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/107% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/107% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify">The Annual Shareholders&rsquo; Meeting
of April 25, 2024, approved the distribution of dividends as interest on capital totaling R$ 836,839, corresponding to a minimum mandatory
dividends and R$ 147,689 as minimum supplementary dividends, totaling R$ 984,528, to be paid on June 24, 2024.</P>

<P STYLE="font: 10pt/107% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 28.4pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>24</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Earnings
                                            per share</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify"><B>Basic and diluted</B></P>

<P STYLE="font: 10pt/105% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify">Basic earnings per share are calculated
by dividing the equity attributable to owners by the weighted average number of outstanding common shares during the period. The Company
does not have potentially dilutive common shares outstanding or debts convertible into common shares. Accordingly, basic and diluted
earnings per share are equal.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<!-- Field: Page; Sequence: 87 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->85<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 63%; padding-bottom: 2pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 19%; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company
    and Consolidated</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 18%; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>January to March
    2024</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: center; border-bottom: Black 0.5pt solid"><B>January to March
    2023</B></P></TD></TR>

<TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 64%; padding-bottom: 2pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="width: 18%; padding-right: 2.85pt; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="width: 18%; padding-right: 2.85pt; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; font-size: 9.5pt; text-align: justify"><FONT STYLE="font-size: 9pt">Profit attributable
    to the Company&rsquo;s owners</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 2pt; padding-left: 2.85pt; font-size: 9.5pt; text-align: right"><FONT STYLE="font-size: 9pt">823,295</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 2pt; padding-left: 2.85pt; font-size: 9.5pt; text-align: right"><FONT STYLE="font-size: 9pt">747,212</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; font-size: 9.5pt; text-align: justify"><FONT STYLE="font-size: 9pt">Weighted
    average number of common shares issued</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 0.5pt solid">683,509,869</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 0.5pt solid">683,509,869</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; font-size: 9.5pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 2pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 2pt; font-size: 9.5pt; text-align: justify"><FONT STYLE="font-size: 9pt">Basic and
    diluted earnings per share (reais per share)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 1.5pt double">1.20451</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 1.5pt double">1.09320</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/105% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 63.8pt">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 35.5pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>25</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Operating
                                            segment information </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify">The Company&rsquo;s Management, composed
of the Board of Directors and the Executive Board, has determined the operating segment used to make strategic decisions, such as sanitation
services.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify">Result</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 11pt Georgia, Times, Serif; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>January to March
    2024</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 39%; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 22%; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Sanitation (i)</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 19%; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Reconciliation
    to the income statement (ii)</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 20%; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Balance according
    to the financial statements</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Gross
    operating revenue </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">5,652,574</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">1,336,418</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">6,988,992</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Gross
    sales deductions</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(437,279)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(437,279)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Net
    operating revenue </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">5,215,295</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,336,418</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">6,551,713</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Costs,
    selling, general, and administrative expenses</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(3,602,590)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,306,372)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(4,908,962)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Income
    from operations before other operating expenses, net and equity accounting </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,612,705</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">30,046</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,642,751</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Other
    operating income (expenses), net</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">7,086</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Equity
    results of investments</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">8,837</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Financial
    result, net</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(335,792)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Income
    from operations before taxes</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,322,882</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Depreciation
    and amortization</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">(772,552)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">(772,552)</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 2.85pt 1pt; text-align: right">&nbsp;</P>


<!-- Field: Page; Sequence: 88 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->86<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 11pt Georgia, Times, Serif; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>January to March
    2023</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 39%; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 22%; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Sanitation (i)</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 19%; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Reconciliation
    to the income statement (ii)</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 20%; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Balance according
    to the financial statements</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Gross
    operating revenue</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">4,909,274</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">1,179,534</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">6,088,808</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Gross
    sales deductions</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(390,439)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(390,439)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Net
    operating revenue</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">4,518,835</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,179,534</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">5,698,369</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 9pt Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 8pt">Costs,
    selling, general, and administrative expenses</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(3,173,849)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,153,015)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(4,326,864)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Income
    from operations before other operating expenses, net and equity accounting </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,344,986</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">26,519</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,371,505</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Other
    operating income (expenses), net</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">14,634</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Equity
    results of investments</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">6,334</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Financial
    result, net</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(259,528)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Income
    from operations before taxes</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,132,945</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Depreciation
    and amortization</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">(657,145)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">(657,145)</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>


<!-- Field: Page; Sequence: 89 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->87<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 11pt Georgia, Times, Serif; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt">&nbsp;</TD>
    <TD COLSPAN="3" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>January to March
    2024</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 41%; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 21%; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Sanitation (i)</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 18%; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Reconciliation
    to the income statement (ii)</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 20%; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Balance according
    to the financial statements</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Gross
    operating revenue</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">5,661,099</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">1,336,778</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">6,997,877</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Gross
    sales deductions</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(437,631)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">-</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(437,631)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Net
    operating revenue</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">5,223,468</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,336,778</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">6,560,246</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 9pt Times New Roman, Times, Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 8pt">Costs,
    selling, general, and administrative expenses</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(3,607,447)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(1,306,723)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(4,914,170)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Income
    from operations before other operating expenses, net and equity accounting </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,616,021</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">30,055</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,646,076</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Other
    operating income (expenses), net</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">7,086</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Equity
    results of investments</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">8,893</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Financial
    result, net</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(338,195)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Income
    from operations before taxes</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 8pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">1,323,860</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt"><FONT STYLE="font-size: 8pt">Depreciation
    and amortization</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">(773,785)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">-</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 8pt">(773,785)</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 12pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 63.8pt"></TD><TD STYLE="width: 28.35pt">(i)</TD><TD STYLE="text-align: justify; padding-right: 33.55pt">See Note 31
                                            for further information about non-cash items, other than depreciation and amortization that
                                            impact segment results, and for additional information on long-lived assets.</TD></TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 12pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 63.8pt"></TD><TD STYLE="width: 28.35pt">(ii)</TD><TD STYLE="text-align: justify; padding-right: 33.55pt">Construction
                                            revenue and related costs are not reported to the CODM. Revenue from construction is recognized
                                            under ICPC 01 (R1) / IFRIC 12 (Concession Agreements) and CPC 47/IFRS 15 (Revenue from Contracts
                                            with Customers), as all performance obligations are met over time. See Note 13 (b) for further
                                            information.</TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>


<!-- Field: Page; Sequence: 90 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->88<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 56.7pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 21.3pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>26</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Operating
                                            revenue</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 56.7pt">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 92.15pt; text-align: justify; text-indent: -20.65pt"><B>Reconciliation
from gross operating revenue to net operating revenue:</B></P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 14.2pt; text-align: justify; text-indent: -14.2pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 43%; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 19%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD>
    <TD STYLE="padding-right: 2.85pt; width: 19%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2023</B></P>
</DIV></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 19%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Revenue
    from sanitation services (i)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">5,652,574</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">4,909,274</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">5,661,099</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Construction
    revenue</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">1,336,418</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">1,179,534</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">1,336,778</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Sales
    tax</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(410,462)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(370,298)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(410,786)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Regulation,
    Control and Oversight Fee (TRCF)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(26,817)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(20,141)</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(26,845)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Net
    revenue</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">6,551,713</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">5,698,369</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">6,560,246</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 14.2pt; text-align: justify; text-indent: -14.2pt">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 6pt 63.8pt; text-align: justify">(i) Includes R$&nbsp;28,406 from the
TRCF charged from customers from January to March 2024 (R$&nbsp;24,019 from January to March 2023), referring to the municipalities regulated
by ARSESP.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 28.4pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>27</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Operating
                                            costs and expenses </B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent Company</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 43%; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 19%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD>
    <TD STYLE="padding-right: 2.85pt; width: 19%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2023</B></P>
</DIV></TD>
    <TD STYLE="padding-right: 2.85pt; width: 19%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Operating
    costs</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Salaries,
    payroll charges, and benefits</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(505,486)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(583,855)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(505,690)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Pension
    plan obligations </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(5,810)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(1,656)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(5,810)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Construction
    costs (Note 25)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(1,306,372)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(1,153,015)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(1,306,723)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;General
    supplies</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(113,013)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(85,831)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(113,440)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Treatment
    supplies</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(141,302)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(164,899)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(141,370)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 9pt Univers, Helvetica, Sans-Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif">&#9;Outsourced
    services</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(503,428)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(435,484)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(504,745)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Electricity</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(393,222)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(395,026)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(393,822)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;General
    expenses</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(283,516)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(227,169)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(283,516)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Depreciation
    and amortization</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(719,078)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(606,788)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(720,311)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(3,971,227)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(3,653,723)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(3,975,427)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Selling
    expenses</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Salaries,
    payroll charges, and benefits</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(62,062)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(70,517)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(62,115)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Pension
    plan obligations</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(840)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(185)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(840)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;General
    supplies</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(1,813)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(1,067)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(1,859)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 9pt Univers, Helvetica, Sans-Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif">&#9;Outsourced
    services</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(100,969)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(109,177)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(101,066)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Electricity</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(210)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(191)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(210)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;General
    expenses</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(26,580)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(27,626)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(26,628)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Depreciation
    and amortization</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(17,369)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(16,894)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(17,369)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(209,843)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(225,657)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(210,087)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 9pt Univers, Helvetica, Sans-Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 9pt Univers, Helvetica, Sans-Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif">Bad
    debt expense, net of recoveries&#9; (Note 9 (c))</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(190,518)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(162,805)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(190,518)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 9pt Univers, Helvetica, Sans-Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 91 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->89<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 43%; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; font: 9pt Univers, Helvetica, Sans-Serif; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif">Administrative
    expenses</FONT></TD>
    <TD STYLE="white-space: nowrap; width: 19%; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="width: 19%; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="width: 19%; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Salaries,
    payroll charges, and benefits</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(112,279)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(55,142)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(112,499)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Pension
    plan obligations</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(21,486)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(32,822)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(21,486)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;General
    supplies</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">24,560
    </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(601)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">24,510
    </FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 9pt Univers, Helvetica, Sans-Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif">&#9;Outsourced
    services</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(76,602)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(80,267)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(77,011)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Electricity</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(372)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(583)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(372)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;General
    expenses</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(294,740)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(60,011)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(294,810)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Depreciation
    and amortization</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(36,105)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(33,463)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(36,105)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Tax
    expenses</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(20,350)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(21,790)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(20,365)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(537,374)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(284,679)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(538,138)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">Operating
    costs and expenses</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Salaries,
    payroll charges, and benefits</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(679,827)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(709,514)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(680,304)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Pension
    plan obligations (Note 21 (v))</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(28,136)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(34,663)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(28,136)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Construction
    costs (Note 25)</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(1,306,372)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(1,153,015)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(1,306,723)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;General
    supplies</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(90,266)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(87,499)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(90,789)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 9pt Univers, Helvetica, Sans-Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif">&#9;Treatment
    supplies</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(141,302)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(164,899)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(141,370)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 9pt Univers, Helvetica, Sans-Serif; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif">&#9;Outsourced
    services</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(680,999)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(624,928)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(682,822)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Electricity</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(393,804)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(395,800)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(394,404)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;General
    expenses</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(604,836)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(314,806)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(604,954)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Depreciation
    and amortization</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(772,552)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(657,145)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(773,785)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify"><FONT STYLE="font-size: 9pt">&#9;Tax
    expenses</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(20,350)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(21,790)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">(20,365)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: justify; text-indent: -2.85pt"><FONT STYLE="font-size: 9pt">&#9;Bad
    debt expense, net of recoveries&#9; (Note 9 (c))</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(190,518)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(162,805)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(190,518)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 2pt; padding-left: 2.85pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">(4,908,962)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 1.5pt double">(4,326,864)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 2pt; text-align: right; border-bottom: Black 1.5pt double">(4,914,170)</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>


<!-- Field: Page; Sequence: 92 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->90<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 0 0 14.2pt; text-align: justify; text-indent: -14.2pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 28.4pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>28</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Financial
                                            income (expenses)</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-top: 2.4pt; padding-right: 2.85pt; padding-bottom: 2.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 49%; padding-top: 2.4pt; padding-right: 2.85pt; padding-bottom: 2.4pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 17%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: center"><B>2024</B></P>
</DIV></TD>
    <TD STYLE="padding-right: 2.85pt; width: 17%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: center"><B>2023</B></P>
</DIV></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 17%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: center"><B>2024</B></P>
</DIV></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Financial
    expenses</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 10pt/110% Verdana, Helvetica, Sans-Serif; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 9pt">Interest
    and charges on borrowings and financing &ndash; local currency </FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(276,622)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(273,106)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(276,622)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Interest
    and charges on borrowings and financing &ndash; foreign currency </FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(28,720)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(21,049)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(28,720)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Other
    financial expenses </FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(175,155)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(101,732)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(175,160)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Inflation
    adjustment on borrowings and financing </FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(54,035)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(70,509)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(54,036)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Other inflation
    adjustments </FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(13,265)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(50,463)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(13,265)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Interest
    and inflation adjustment on provisions</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 0.5pt solid">(44,300)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 0.5pt solid">(45,612)</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 0.5pt solid">(44,300)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; font: 9pt/110% Univers, Helvetica, Sans-Serif; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif">Total
    financial expenses</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">(592,097)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">(562,471)</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">(592,103)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Financial
    revenue</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Inflation
    adjustment gains </FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">55,881</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">60,314</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">55,881</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Income
    on financial investments </FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">112,772</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">103,217</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">110,375</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Interest
    income </FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">92,932</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">66,560</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">92,932</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Cofins
    and Pasep </FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(11,615)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(10,788)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(11,615)</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Other
    </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 0.5pt solid">2</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 0.5pt solid">17</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 0.5pt solid">2</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Total
    financial income</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">249,972</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">219,320</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">247,575</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Financial
    income (expenses), net of exchange rate changes</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">(342,125)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">(343,151)</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">(344,528)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Exchange
    gain (losses)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Exchange
    rate changes on borrowings and financing</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">6,335</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">83,825</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">6,335</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Exchange
    rate changes on assets</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">(201)</FONT></TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Other
    exchange rate changes</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 0.5pt solid">(3)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 0.5pt solid">(1)</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 0.5pt solid">(3)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Exchange
    rate changes, net</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">6,333</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">83,623</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">6,333</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding: 2.4pt 2.85pt; white-space: nowrap; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding: 2.4pt 2.85pt 2.4pt 7.1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Financial
    income (expenses)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">(335,792)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">(259,528)</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 2.4pt 0; text-align: right; border-bottom: Black 1.5pt double">(338,195)</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>


<!-- Field: Page; Sequence: 93 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->91<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 28.4pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>29</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Other
                                            operating income (expenses), net</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: center">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.75pt solid"><B>Parent Company</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.75pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 49%; padding-bottom: 1pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 17%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD>
    <TD STYLE="padding-right: 2.85pt; width: 17%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2023</B></P>
</DIV></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; width: 17%; padding-left: 2.85pt"><DIV STYLE="margin-right: 2.85pt; margin-left: 2.85pt; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>January to March </B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center"><B>2024</B></P>
</DIV></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Other operating income, net
    </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">10,291</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">20,352</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">10,291</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Other operating expenses </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.75pt solid">(3,205)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.75pt solid">(5,718)</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.75pt solid">(3,205)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify"><FONT STYLE="font-size: 9pt">Other operating income (expenses),
    net</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 2.25pt double">7,086</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 2.25pt double">14,634</P></TD>
    <TD STYLE="padding-right: 2.85pt; white-space: nowrap; padding-left: 2.85pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 2.25pt double">7,086</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify">Other operating income includes revenue
from the sale of property, plant and equipment, contracts awarded in public bids, right to sell electricity, indemnities and reimbursement
of expenses, fines and guarantees, property leases, reuse water, PURA projects and services, net of Cofins and Pasep.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify">Other operating expenses usually record
the derecognition of concession assets due to obsolescence, discontinued construction works, unproductive wells, projects considered
economically unfeasible, losses on property, plant and equipment, estimated losses, and operational assets indemnification.</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 28.4pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>30</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Commitments</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify">The Company has agreements to manage
and maintain its activities, as well as to build new projects aiming at achieving the objectives proposed in its target plan. The main
unrecognized committed amounts as of March 31, 2024 are as follows:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 11pt Georgia, Times, Serif; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom; background-color: white">
    <TD STYLE="white-space: nowrap; width: 35%; padding-right: 3.5pt; padding-left: 3.5pt">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 13%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>1 year</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 13%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>1-3 years</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 13%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>3-5 years</B></P></TD>
    <TD STYLE="white-space: nowrap; width: 13%; padding-right: 3.5pt; padding-left: 3.5pt"><DIV STYLE="padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: center"><B>More than</B></P>
    <P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: center"><B>5 years</B></P>
</DIV></TD>
    <TD STYLE="white-space: nowrap; width: 13%; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 1pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Total</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom; background-color: white">
    <TD STYLE="white-space: nowrap; padding-top: 1pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Contractual
    obligations &ndash; Expenses </FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">1,854,851</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">2,319,376</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">1,377,556</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">4,349,060</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right"><FONT STYLE="font-size: 9pt">9,900,843</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom; background-color: white">
    <TD STYLE="white-space: nowrap; padding-top: 1pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Contractual
    obligations - Investments</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">4,174,937</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">2,719,760</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">1,136,509</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">82,392</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">8,113,598</P></TD></TR>
  <TR STYLE="vertical-align: bottom; background-color: white">
    <TD STYLE="white-space: nowrap; padding-top: 1pt; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">6,029,788</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">5,039,136</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">2,514,065</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">4,431,452</P></TD>
    <TD STYLE="white-space: nowrap; padding-right: 3.5pt; padding-left: 3.5pt"><P STYLE="font: 9pt Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">18,014,441</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>


<!-- Field: Page; Sequence: 94 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->92<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 28.4pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>31</B></FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Supplemental
                                            cash flow information</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 0 0 63.8pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Parent
    Company</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>Consolidated</B></P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; width: 46%; padding-bottom: 1pt; text-align: center; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; width: 18%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>January
    to March 2024</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 18%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>January
    to March 2023</B></P></TD>
    <TD STYLE="padding-right: 2.85pt; width: 18%; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: center; border-bottom: Black 0.5pt solid"><B>January
    to March 2024</B></P></TD></TR>
  <TR>
    <TD STYLE="white-space: nowrap; vertical-align: bottom; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Total additions
    to contract assets (Note 13)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,270,307</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,204,867</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">1,270,667</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Total additions
    to intangible assets (Note 14 (b))</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">133,759</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">322</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">133,759</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Items not
    affecting cash (see breakdown </FONT><FONT STYLE="font-size: 10pt">below</FONT><FONT STYLE="font-size: 9pt">)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(833,007)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(634,857)</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">(833,016)</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Total additions
    to intangible and contract assets according to the statement of cash flows</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">571,059</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">570,332</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">571,410</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Investments
    and financing operations affecting intangible assets but not cash:</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Interest
    capitalized in the period (Note 13 (a))</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">154,395</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">167,802</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">154,395</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Contractors
    payable</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">453,671</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">240,833</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">453,671</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Performance agreements</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">64,229</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">199,383</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">64,229</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Right of use </FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">130,666</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">320</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-bottom: 1pt; padding-left: 2.85pt; text-align: right; line-height: 110%"><FONT STYLE="font-size: 9pt">130,666</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; line-height: 110%"><FONT STYLE="font-size: 9pt">Construction margin (Note 25)</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">30,046</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">26,519</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 0.5pt solid">30,055</P></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="white-space: nowrap; padding-bottom: 1pt; text-align: justify; line-height: 110%"><FONT STYLE="font-size: 9pt">Total</FONT></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">833,007</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">634,857</P></TD>
    <TD STYLE="padding-right: 2.85pt; padding-left: 2.85pt"><P STYLE="font: 9pt/110% Georgia, Times, Serif; margin: 0 0 1pt; text-align: right; border-bottom: Black 1.5pt double">833,016</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 12pt/110% Arial, Helvetica, Sans-Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 28.4pt"></TD><TD STYLE="width: 35.4pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>32</B></FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-family: Georgia, Times, Serif; font-size: 10pt"><B>Events
                                            after the reporting period</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 56.7pt"></TD><TD STYLE="width: 7.1pt"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Tariff
                                            adjustment</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify; text-indent: -20.65pt"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify; text-indent: -20.65pt">As of April 08,
2024, the S&atilde;o Paulo State Utility Services Regulatory Agency (ARSESP) disclosed Resolution 1,514/2024, authorizing the Company
to apply the tariff adjustment of 6.4469%, regarding the tariffs in effect.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 56.7pt"></TD><TD STYLE="width: 7.1pt"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Methodology
                                            and criteria for asset reversal</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify; text-indent: -20.65pt">As of April 15,
2024, ARSESP disclosed Resolution 1,515/2024, which included the methodology and criteria for reversal and possible indemnification of
assets at the end of the concessions of the Basic Sanitation sector.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 56.7pt"></TD><TD STYLE="width: 7.1pt"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Privatization
                                            process</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 63.8pt; text-align: justify; text-indent: 0in">As of April 17, 2024,
the Board of the State Privatization Program (CDPED), together with the Management Council of the State Public-Private Partnership (CGPPP)
approved the final model for the partial divestment of movable assets directly and indirectly held by the State, with authorization to
proceed with the divestment through a Public Offering for Distribution of Shares on the stock exchange, according to Article 1 of Decree
67,759/2023, including:</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: 0in">(a) Schedule of the privatization
process;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: 0in">(b) Structure of the offering
with the participation of strategic investors and criteria for judging the winner of the secondary public offering;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: 0in">(c) Changes to the Company&rsquo;s
Bylaws;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: 0in">(d) Execution of the Investment
Agreement, Lock-up, and other agreements with strategic investors;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: 0in">(e) Guarantee of stability
to employees under Law 17,853/2023, for 18 months from the effective completion date of the privatization process;</P>


<!-- Field: Page; Sequence: 95 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->93<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 56.7pt"><B>Notes to the Quarterly Information</B></P><P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 0.6pt 0 0 1pt; text-indent: 1pt"><B></B></P></TD><TD>&nbsp;</TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: 0in">(f) Recommendation of the
offering of common shares held by the S&atilde;o Paulo State Government to Company employees;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: 0in">(g) Submission of the following
documents to the representatives of URAE - 1 Southwest&rsquo;s Decision-Making Board for the 1st Board meeting:</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt">&nbsp;</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-indent: 0in">&bull; Draft of the concession agreement and
exhibits</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 1.85pt 70.9pt; text-indent: 0in">&bull; Draft of the charter of URAE-1&rsquo;s
Decision-Making Board</P>

<P STYLE="font: 10pt Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-indent: 0in">&bull; Draft of the Regional Basic Sanitation
Plan</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: -20.65pt">The definition
of the minimum price and the percentage of the State&rsquo;s equity interest to be divested, as well as the details of the Investment
Agreement, Lock-up, and other conditions will be subject to a resolution at a future Board meeting.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 63.8pt"></TD><TD STYLE="width: 7.1pt"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Financial
                                            derivative agreements</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: -20.65pt">As of April 17,
2024, the Company executed derivative financial agreements with selected financial institutions to reduce the exposure of the balance
in foreign currency of existing debts, totaling US$ 534 million, against fluctuations in the foreign exchange market and mitigate the
impacts of these fluctuations on the Company&rsquo;s economic and financial results. The agreements are valid from April 2024 to December
2024.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 63.8pt"></TD><TD STYLE="width: 7.1pt"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Annual
                                            and Extraordinary Shareholders&rsquo; Meeting</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: -20.65pt">The General Annual
Shareholders&rsquo; Meeting was held on April 25, 2024.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt/110% Georgia, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 63.8pt"></TD><TD STYLE="width: 7.1pt"><FONT STYLE="font-family: Symbol; font-size: 10pt">&middot;</FONT></TD><TD STYLE="text-align: justify; padding-right: 26.5pt"><FONT STYLE="font-size: 10pt"><B>Privatization
                                            process</B></FONT></TD></TR></TABLE>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: -20.65pt">&nbsp;</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0 26.5pt 0 70.9pt; text-align: justify; text-indent: -20.65pt">The S&atilde;o
Paulo Municipal Chamber approved, and the Mayor sanctioned Municipal Law 18.107 of May 02, 2024, authorizing the Municipal Executive
Power to execute contracts through a regionalized arrangement aimed at providing water supply and sanitation services in the Municipality
of S&atilde;o Paulo.</P>

<P STYLE="font: 10pt/110% Georgia, Times, Serif; margin: 0; text-align: justify; text-indent: -20.65pt">&nbsp;</P>


<!-- Field: Page; Sequence: 96; Options: NewSection; Value: 94 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->94<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 9.5pt Georgia, Times, Serif; margin: 0; text-indent: 90.6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</P>

<P STYLE="font: 9.5pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 9.5pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 9.5pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: bold 9.5pt Georgia, Times, Serif; margin: 0 0 0 62.7pt; text-align: justify; text-indent: -34.5pt">Comments on the Company&rsquo;s
Projections</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0 0 12pt">&nbsp;</P>

<P STYLE="font: 9.5pt Georgia, Times, Serif; margin: 0 61.55pt 0 62.7pt; text-align: justify">The projections presented in the Reference
Form are annual and not on a quarterly basis. Therefore, the quarterly comparison between information disclosed in the Reference Form
and quarterly results shall not apply.</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 9.5pt Georgia, Times, Serif; margin: 0 0 0 62.7pt; text-align: justify">Projections are monitored every year and disclosed
in the Reference Form.</P>


<!-- Field: Page; Sequence: 97 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->95<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 1.05pt 0 0">&nbsp;</P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 63.75pt 0 65.05pt; text-indent: 0in"><B>1.<FONT STYLE="font-size: 7pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</FONT>CHANGES IN INTEREST HELD BY THE CONTROLLING SHAREHOLDER, BOARD MEMBERS, AND EXECUTIVE OFFICERS</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 2.4pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: silver">
    <TD COLSPAN="5" STYLE="border: black 1pt solid"><P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 67.75pt 0 68.55pt; text-align: center"><B>CONSOLIDATED SHAREHOLDING
    POSITION OF CONTROLLING SHAREHOLDERS AND MANAGEMENT, AND OUTSTANDING SHARES </B></P>
    <P STYLE="font: 11pt/97% Times New Roman, Times, Serif; margin: 0 0 0 0.85pt; text-align: center"><B>Position as of 03/31/2024</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 35%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 12.65pt; padding-left: 0.65pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Shareholder</B></FONT></TD>
    <TD STYLE="width: 21%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 3.45pt; padding-left: 4.35pt; text-align: center; line-height: 105%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Number
    of Common Shares (Units)</B></FONT></TD>
    <TD STYLE="width: 9%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 12.65pt; padding-left: 0.9pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>%</B></FONT></TD>
    <TD STYLE="width: 23%; border-bottom: black 1pt solid; border-right: black 1pt solid"><P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 8.15pt 0 9.1pt; text-align: center"><B>Total Number of Shares</B></P>
    <P STYLE="font: 11pt/97% Times New Roman, Times, Serif; margin: 0 8.35pt 0 9.1pt; text-align: center"><B>(Units)</B></P></TD>
    <TD STYLE="width: 12%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 12.65pt; padding-left: 1.05pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>%</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.15pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Controlling
    Shareholder</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.3pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">Treasury
    Department</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.45pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">343,506,664</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.5pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">50.3%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.55pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">343,506,664</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.4pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">50.3%</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid"><P STYLE="font: 11pt/104% Times New Roman, Times, Serif; margin: 0 0 0 3.45pt">Companhia Paulista de Parcerias</P>
    <P STYLE="font: 11pt/97% Times New Roman, Times, Serif; margin: 0 0 0 3.45pt">- CPP</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 12.55pt; padding-right: 2.7pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 12.55pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">0%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 12.55pt; padding-right: 2.7pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 12.55pt; padding-right: 2.4pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">0%</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.35pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Management</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.25pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">Board
    of Directors</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.55pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">5,100</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">0.0%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">5,100</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.4pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">0.0%</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.3pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">Executive
    Board</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">1,300</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.55pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">0.0%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">1,300</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.35pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">0.0%</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.3pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Fiscal
    Council</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">110</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">0.0%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">110</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.4pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">0.0%</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.35pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Treasury
    Shares</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.65pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.65pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.7pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.45pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.35pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Other
    Shareholders</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.3pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Total</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>343,513,180</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.55pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>50.3%</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>343,513,180</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.35pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>50.3%</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.25pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">Outstanding
    Shares</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">339,996,689</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">49.7%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">339,996,689</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.4pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">49.7%</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 98 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->96<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 2.95pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: silver">
    <TD COLSPAN="5" STYLE="border: black 1pt solid"><P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 67.75pt 0 68.55pt; text-align: center"><B>CONSOLIDATED SHAREHOLDING
    POSITION OF CONTROLLING SHAREHOLDERS AND MANAGEMENT, AND OUTSTANDING SHARES </B></P>
    <P STYLE="font: 11pt/97% Times New Roman, Times, Serif; margin: 0 0 0 0.85pt; text-align: center"><B>Position as of 03/31/2023</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 35%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 12.65pt; padding-left: 0.65pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Shareholder</B></FONT></TD>
    <TD STYLE="width: 21%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 3.45pt; padding-left: 4.35pt; text-align: center; line-height: 105%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Number
    of Common Shares (Units)</B></FONT></TD>
    <TD STYLE="width: 9%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 12.65pt; padding-left: 0.9pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>%</B></FONT></TD>
    <TD STYLE="width: 23%; border-bottom: black 1pt solid; border-right: black 1pt solid"><P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0 8.15pt 0 9.1pt; text-align: center"><B>Total Number of Shares</B></P>
    <P STYLE="font: 11pt/97% Times New Roman, Times, Serif; margin: 0 8.35pt 0 9.1pt; text-align: center"><B>(Units)</B></P></TD>
    <TD STYLE="width: 12%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 12.65pt; padding-left: 1.05pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>%</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.15pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Controlling
    Shareholder</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.3pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">Treasury
    Department</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.35pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">343,506,664</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.4pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">50.3%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.5pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">343,506,664</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.3pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">50.3%</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid"><P STYLE="font: 11pt/104% Times New Roman, Times, Serif; margin: 0 0 0 3.45pt">Companhia Paulista de Parcerias</P>
    <P STYLE="font: 11pt/97% Times New Roman, Times, Serif; margin: 0 0 0 3.45pt">- CPP</P></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 12.55pt; padding-right: 2.7pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 12.55pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">0%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 12.55pt; padding-right: 2.7pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">6</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 12.55pt; padding-right: 2.4pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">0%</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.35pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Management</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.25pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">Board
    of Directors</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.5pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">100</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.55pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">0.0%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.55pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">100</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.35pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">0.0%</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.3pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">Executive
    Board</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.55pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">1,300</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.55pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">0.0%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.55pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">1,300</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.35pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">0.0%</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.3pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Fiscal
    Council</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.7pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.7pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.7pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.2pt; padding-right: 2.45pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.35pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Treasury
    Shares</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.65pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.65pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.7pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.45pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.35pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Other
    Shareholders</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 5.45pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 5.45pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 5.45pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 5.2pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">-</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.3pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Total</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>343,508,070</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.55pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>50.3%</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>343,508,070</B></FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.3pt; padding-right: 2.35pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>50.3%</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 4.25pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">Outstanding
    Shares</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">340,001,799</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">49.7%</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.6pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">340,001,799</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 4.25pt; padding-right: 2.4pt; text-align: right; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif">49.7%</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0.2pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 11pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 65.1pt"></TD><TD STYLE="width: 21.25pt"><B>2.</B></TD><TD><B>SHAREHOLDING POSITION</B></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 3.5pt 0 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 11pt Georgia, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top; background-color: silver">
    <TD COLSPAN="5" STYLE="border: black 1pt solid; padding-right: 20.6pt; padding-left: 3.45pt; line-height: 105%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>SHAREHOLDING
    POSITION OF HOLDERS OF MORE THAN 5% OF EACH TYPE AND CLASS OF COMPANY SHARES, UP TO THE INDIVIDUAL LEVEL</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: silver">
    <TD COLSPAN="3" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid"><P STYLE="font: 11pt/104% Times New Roman, Times, Serif; margin: 0 0 0 3.45pt"><B>Company:</B></P>
    <P STYLE="font: 11pt/97% Times New Roman, Times, Serif; margin: 0 0 0 3.45pt"><B>CIA SANEAMENTO B&Aacute;SICO ESTADO S&Atilde;O PAULO</B></P></TD>
    <TD COLSPAN="2" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-right: 13.75pt; padding-left: 58.15pt; line-height: 105%; text-indent: -25.6pt"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Position
    as of 03/31/2023 (Number of shares)</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.95pt; padding-left: 29.05pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Common
    Shares</B></FONT></TD>
    <TD COLSPAN="2" STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 6.95pt; padding-left: 1.15pt; text-align: center; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Total</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 33%; border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 7.15pt; padding-left: 3.45pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Shareholder</B></FONT></TD>
    <TD STYLE="width: 21%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 7.15pt; padding-left: 19.9pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Number
    of Shares</B></FONT></TD>
    <TD STYLE="width: 9%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 7.15pt; padding-left: 0.95pt; text-align: center; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>%</B></FONT></TD>
    <TD STYLE="width: 22%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 7.15pt; padding-left: 22.4pt; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Number
    of Shares</B></FONT></TD>
    <TD STYLE="width: 15%; border-bottom: black 1pt solid; border-right: black 1pt solid; padding-top: 7.15pt; padding-left: 1.15pt; text-align: center; line-height: 97%"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>%</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-top: 12.55pt; padding-left: 3.45pt; line-height: 98%"><FONT STYLE="font-family: Times New Roman, Times, Serif">Treasury
    Department</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 12.55pt; padding-left: 36.7pt; line-height: 98%"><FONT STYLE="font-family: Times New Roman, Times, Serif">343,506,664</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 12.55pt; padding-left: 22.4pt; line-height: 98%"><FONT STYLE="font-family: Times New Roman, Times, Serif">50.3</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 12.55pt; padding-left: 41.65pt; line-height: 98%"><FONT STYLE="font-family: Times New Roman, Times, Serif">343,506,664</FONT></TD>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; padding-top: 12.55pt; padding-right: 2.35pt; text-align: right; line-height: 98%"><FONT STYLE="font-family: Times New Roman, Times, Serif">50.3</FONT></TD></TR>
  </TABLE>

<!-- Field: Page; Sequence: 99 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->97<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 3.8pt 0 0"><B>&nbsp;</B></P>

<P STYLE="font: bold 12pt Arial, Helvetica, Sans-Serif; margin: 0">Reports and Statements / Unqualified Report on Special Review</P>

<P STYLE="font: 8pt Trebuchet MS, Times, Serif; margin: 5.35pt 0 0">(Free translation from the original issued in Portuguese. In the
event of any discrepancies, the Portuguese language version shall prevail.)</P>

<P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 3.8pt 8.75pt 0 0">&nbsp;</P>

<P STYLE="font: 14pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify; text-indent: 0in; color: #98002E"><B>INDEPENDENT
AUDITOR&rsquo;S REVIEW REPORT ON THE INDIVIDUAL AND CONSOLIDATED INTERIM FINANCIAL INFORMATION</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">To the</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">Shareholders and Management of</P>

<P STYLE="font: bold 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify; text-indent: 0in">Companhia de Saneamento
B&aacute;sico do Estado de S&atilde;o Paulo - SABESP</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">S&atilde;o Paulo - SP</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>

<P STYLE="color: #98002E; font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify"><B>Introduction</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">We have reviewed the individual and consolidated
interim financial information of <B>Companhia de Saneamento B&aacute;sico do Estado de S&atilde;o Paulo (&ldquo;Company&rdquo;)</B>,
included in the Quarterly Information, for the quarter ended March 31, 2024, which comprise the individual and consolidated statements
of financial position as at March 31, 2024, and the respective individual and consolidated statements of income, comprehensive income,
the statements of changes in equity and cash flows for the three-month period then ended, as well as the corresponding notes.</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">The Company&rsquo;s Management is responsible
for the preparation of this individual and consolidated interim financial information, in accordance with NBC TG 21 (R4) and International
Accounting Standard (IAS) 34 - Interim Financial Reporting, issued by the International Accounting Standards Board (IASB), and for its
presentation in accordance with standards issued by the Brazilian Securities and Exchange Commission (CVM) applicable to Quarterly Information.
Our responsibility is to express a conclusion on this individual and consolidated interim financial information based on our review.</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify; color: #98002E"><B>Scope of the review</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify; text-indent: 0in">We conducted our review
in accordance with Brazilian and international standards on review engagements (NBC TR 2410 and ISRE 2410 - Review of Interim Financial
Information Performed by the Independent Auditor of the Entity). A review of interim financial information consists principally of applying
analytical and other review procedures and making enquiries of and having discussions with persons responsible for financial and accounting
matters. An interim review is substantially less in scope than an audit conducted in accordance with auditing standards, and has not
provided us assurance that we would become aware of any or all significant matters that might be identified in an audit. Accordingly,
we do not express such an audit opinion.</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify; text-indent: 0in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify; text-indent: 0in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify; color: #98002E"><B>Conclusion on the individual
and consolidated interim financial information </B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify; text-indent: 0in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify; text-indent: 0in">Based on our review, we
are not aware of any fact that would lead us to believe that the individual and consolidated interim financial information included in
the quarterly information referred to above has not been prepared, in all material respects, in accordance with NBC TG 21 (R4) and IAS
34, applicable to Quarterly Information (ITR), and presented in accordance with the standards issued by CVM.</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify; color: #98002E"><B>Other matters</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify"><B>Review of corresponding amounts</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">The individual and consolidated interim financial
information for the quarter ended March 31, 2023, presented for comparison purposes, was reviewed by other independent auditors, whose
report thereon dated May 11, 2023, was unmodified.</P>


<!-- Field: Page; Sequence: 100 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->98<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify"><B>Individual and Consolidated Interim statements
of value added (DVA) &ndash; supplementary information</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">We also reviewed the individual and consolidated
interim statements of value added for the three-month period ended March 31, 2024, prepared under the responsibility of the Company&rsquo;s
Management, whose disclosure in the interim financial information is required in accordance with the standards issued by CVM and considered
as supplementary information for the purposes of IAS&nbsp;34. These statements were submitted to review procedures executed with the
review of the quarterly information, with the purpose of concluding whether they are reconciled with the individual and consolidated
interim financial information and accounting records, as applicable, and if its form and contents meet the criteria defined in Technical
Pronouncement CPC 09 &ndash; Statement of Value Added. Based on our review, we are not aware of any fact that would lead us to believe
that these individual and consolidated interim statements of value added were not prepared, in all material respects, in accordance with
the criteria established in this technical pronouncement and consistently with the individual and consolidated interim financial information
taken as a whole.</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">The accompanying financial information have
been translated into English for the convenience of readers outside Brazil.</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: right">S&atilde;o Paulo, May 9, 2024.</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 11pt Georgia, Times, Serif; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 100%; padding-right: 8.75pt; padding-left: 5.4pt; text-align: justify"><FONT STYLE="font-family: Trebuchet MS, Times, Serif"><B><IMG SRC="image_002.jpg" ALT="" STYLE="height: 25.2pt; width: 60.6pt"></B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 11pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify"><B>BDO RCS Auditores Independentes SS
    Ltda.</B></P>
    <P STYLE="font: 11pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify"><FONT STYLE="font-variant: small-caps"><B>CRC
    2 SP 013846/O-1</B></FONT></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 5.4pt; padding-left: 5.4pt"><P STYLE="font: 11pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P>
    <P STYLE="font: 11pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 0; text-align: justify">&nbsp;</P></TD></TR>
  </TABLE>
<P STYLE="font: bold 11pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 41.5pt">D&aacute;rio Vieira de Lima</P>

<P STYLE="font: bold 11pt Trebuchet MS, Times, Serif; margin: 0 8.75pt 0 10.35pt">Accountant CRC 1 SP 238754/O-6</P>

<P STYLE="font: bold 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 10.35pt">&nbsp;</P>

<P STYLE="font: bold 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 10.35pt">&nbsp;</P>


<!-- Field: Page; Sequence: 101 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->99<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: bold 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 10.35pt">&nbsp;</P>

<P STYLE="font: bold 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 10.35pt">&nbsp;</P>

<P STYLE="font: bold 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 10.35pt">&nbsp;</P>

<P STYLE="font: bold 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 10.35pt">&nbsp;</P>

<P STYLE="font: bold 12pt Arial, Helvetica, Sans-Serif; margin: 0 0 0 10.35pt">Reports and Statements / Executive Officers&rsquo; Statement
on the Financial Statements</P>

<P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 5.1pt 0 0"><B>&nbsp;</B></P>

<P STYLE="font: 9pt/192% Arial, Helvetica, Sans-Serif; margin: 0 248.3pt 0 10.35pt">Executive Officers&rsquo; Statement on the Quarterly
Information STATEMENT</P>

<P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 0.35pt 5.5pt 0 10.35pt; text-align: justify">The Executive Officers of
Companhia de Saneamento B&aacute;sico do Estado de S&atilde;o Paulo - SABESP, with Corporate Taxpayers&rsquo; ID (CNPJ/MF) number 43.776.517/0001-80,
headquartered at Rua Costa Carvalho, n&ordm; 300, Pinheiros, S&atilde;o Paulo, declare that, according to paragraph 1 of article 27,
item VI of CVM Resolution 80, of March 29, 2022, that:</P>

<P STYLE="font: 9pt/192% Arial, Helvetica, Sans-Serif; margin: 9.65pt 110.15pt 0 10.35pt; text-align: justify">They reviewed, discussed,
and agreed with the quarterly information for the period ended March 31, 2024. S&atilde;o Paulo, May 09, 2024.</P>

<P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.1pt 0 0 10.35pt; text-align: justify">Companhia de Saneamento B&aacute;sico
do Estado de S&atilde;o Paulo - SABESP</P>

<P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 9.9pt 379.7pt 0 10.35pt">Andr&eacute; Gustavo Salcedo Teixeira Mendes Chief
Executive Officer</P>

<P STYLE="font: 9pt/85% Arial, Helvetica, Sans-Serif; margin: 9.7pt 0 0 10.35pt">Catia Cristina Teixeira Pereira</P>

<P STYLE="font: 9pt/85% Arial, Helvetica, Sans-Serif; margin: 0 0 0 10.35pt">Chief Economic, Financial, and Investor Relations Officer</P>

<P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 9.9pt 346.75pt 0 10.35pt">Sabrina de Menezes Correa Furstenau Sabino People
and Corporate Management Officer</P>

<P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 9.95pt 379.7pt 0 10.35pt">Paula Alessandra Bonin Costa Violante Engineering
and Innovation Officer</P>

<P STYLE="font: 9pt/85% Arial, Helvetica, Sans-Serif; margin: 9.7pt 0 0 10.35pt">Roberval Tavares de Souza</P>

<P STYLE="font: 9pt/85% Arial, Helvetica, Sans-Serif; margin: 0 0 0 10.35pt">Operation and Maintenance Officer</P>

<P STYLE="font: 9pt/85% Arial, Helvetica, Sans-Serif; margin: 9.7pt 0 0 10.35pt">Bruno Magalh&atilde;es D&rsquo;Abadia</P>

<P STYLE="font: 9pt/85% Arial, Helvetica, Sans-Serif; margin: 0 0 0 10.35pt">Regulation and New Businesses Officer</P>

<P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 9.9pt 392.85pt 0 10.35pt">Caio Marcelo de Medeiros Melo Customers Officer</P>


<!-- Field: Page; Sequence: 102 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->100<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; font: 11pt Arial, Helvetica, Sans-Serif; width: 100%"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 90%"><P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">ITR - Quarterly Information Form - 03/31/2024 - CIA SANEAMENTO BASICO EST SAO PAULO</P></TD><TD STYLE="width: 10%"><P STYLE="text-align: right; font: 9pt Arial, Helvetica, Sans-Serif; margin: 0.65pt 0 0 1pt; text-indent: 1pt">Version : 1</P></TD></TR><TR STYLE="vertical-align: top; text-align: left"><TD>&nbsp;</TD><TD>&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 11pt Georgia, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 12pt Arial, Helvetica, Sans-Serif; margin: 4.15pt 0 0">&nbsp;</P>

<P STYLE="font: bold 12pt/96% Arial, Helvetica, Sans-Serif; margin: 0 7.8pt 0 10.35pt">Reports and Statements / Executive Officers&rsquo;
Statement on the Report of Independent Registered Public Accounting Firm</P>

<P STYLE="font: 9pt/192% Arial, Helvetica, Sans-Serif; margin: 5.6pt 248.3pt 0 10.35pt">Executive Officers&rsquo; Statement on the Report
of Independent Registered Public Accounting Firm STATEMENT</P>

<P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 0.3pt 5.5pt 0 10.35pt; text-align: justify">The Executive Officers of Companhia
de Saneamento B&aacute;sico do Estado de S&atilde;o Paulo - SABESP, with Corporate Taxpayers&rsquo; ID (CNPJ/MF) number 43.776.517/0001-80,
headquartered at Rua Costa Carvalho, n&ordm; 300, Pinheiros, S&atilde;o Paulo, declare that, according to paragraph 1 of article 27,
item V of CVM Resolution 80, of March 29, 2022, that:</P>

<P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 9.95pt 7.8pt 0 10.35pt">They reviewed, discussed, and agreed with the Report
of Independent Registered Public Accounting Firm on the quarterly information for the period ended March 31, 2024.</P>

<P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 9.7pt 0 0 10.35pt">S&atilde;o Paulo, May 09, 2024.</P>

<P STYLE="font: 9pt Arial, Helvetica, Sans-Serif; margin: 0 248.3pt 0 10.35pt">Companhia de Saneamento B&aacute;sico do Estado de S&atilde;o
Paulo - SABESP Andr&eacute; Gustavo Salcedo Teixeira Mendes</P>

<P STYLE="font: 9pt/83% Arial, Helvetica, Sans-Serif; margin: 0 0 0 10.35pt">CEO</P>

<P STYLE="font: 9pt/85% Arial, Helvetica, Sans-Serif; margin: 9.65pt 0 0 10.35pt">Catia Cristina Teixeira Pereira</P>

<P STYLE="font: 9pt/85% Arial, Helvetica, Sans-Serif; margin: 0 0 0 10.35pt">Chief Economic, Financial, and Investor Relations Officer</P>

<P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 9.95pt 346.75pt 0 10.35pt">Sabrina de Menezes Correa Furstenau Sabino People
and Corporate Management Officer</P>

<P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 9.95pt 379.7pt 0 10.35pt">Paula Alessandra Bonin Costa Violante Engineering
and Innovation Officer</P>

<P STYLE="font: 9pt/85% Arial, Helvetica, Sans-Serif; margin: 9.65pt 0 0 10.35pt">Roberval Tavares de Souza</P>

<P STYLE="font: 9pt/85% Arial, Helvetica, Sans-Serif; margin: 0 0 0 10.35pt">Operation and Maintenance Officer</P>

<P STYLE="font: 9pt/85% Arial, Helvetica, Sans-Serif; margin: 9.7pt 0 0 10.35pt">Bruno Magalh&atilde;es D&rsquo;Abadia</P>

<P STYLE="font: 9pt/85% Arial, Helvetica, Sans-Serif; margin: 0 0 0 10.35pt">Regulation and New Businesses Officer</P>

<P STYLE="font: 9pt/96% Arial, Helvetica, Sans-Serif; margin: 9.9pt 392.85pt 0 10.35pt">Caio Marcelo de Medeiros Melo Customers Officer</P>



<P STYLE="font: 11pt Arial, Helvetica, Sans-Serif; margin: 0 0 12pt 0.5pt; text-align: justify"></P>

<P STYLE="font: 11pt Arial, Helvetica, Sans-Serif; margin: 0 0 12pt 0.5pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 11pt Arial, Helvetica, Sans-Serif; margin: 0 0 12pt 0.5pt; text-align: justify"></P>

<!-- Field: Page; Sequence: 103; Options: Last -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: right; width: 100%">Page <!-- Field: Sequence; Type: Arabic; Name: PageNo -->101<!-- Field: /Sequence --> of 101&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->



<P></P>

<DIV align=center><DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: small; color: #000000"><B><U>SIGNATURE&nbsp;</U></B></FONT><FONT STYLE="font-size: xx-small">&nbsp;</FONT></DIV>

<DIV>&nbsp;</DIV>

<DIV align=justify><FONT STYLE="font-family: Times New Roman; font-size: small; color: #000000">Pursuant to the requirements of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized,
in the city S&#227;o Paulo, Brazil. <BR></FONT></DIV>

<DIV align=justify><FONT STYLE="font-family: Times New Roman; font-size: small; color: #000000">Date:&nbsp;June 7, 2024</FONT></DIV>

<DIV>&nbsp;</DIV>

<DIV align=center><TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 70%"> <TR><TD vAlign=top width="50%" colSpan=3><DIV align=left><FONT STYLE="font-family: Times New Roman; font-size: small; color: #000000"><B>Companhia de Saneamento B&#225;sico
   do Estado de S&#227;o Paulo - SABESP </B></FONT></DIV></TD></TR>

<TR>

   <TD height=16></TD>

   <TD height=16></TD>

   <TD height=16></TD></TR>

<TR>

   <TD vAlign=top align=left><FONT STYLE="font-family: Times New Roman; font-size: x-small; color: #000000">By:</FONT></TD>

   <TD vAlign=bottom align=left>/s/&nbsp;&nbsp;<FONT STYLE="font-family: times new roman; font-size: small">Catia Cristina Teixeira Pereira</FONT>&nbsp;&nbsp;&nbsp;&nbsp;
   <HR ALIGN="LEFT" COLOR="#000000" SIZE="1" NOSHADE></TD>

   <TD></TD></TR>

<TR>

   <TD><FONT STYLE="font-size: xx-small">&nbsp;</FONT></TD>

   <TD vAlign=bottom width="53%" align=center><DIV align=left><FONT STYLE="font-family: Times New Roman; font-size: x-small; color: #000000">Name: Catia Cristina Teixeira Pereira
   </FONT></DIV>

   <DIV align=left><FONT STYLE="font-family: Times New Roman; font-size: x-small; color: #000000">Title: Chief Financial Officer and
   Investor Relations Officer </FONT></DIV></TD>

   <TD></TD></TR></TABLE></DIV>

<DIV>&nbsp;</DIV>

<P>&nbsp;</P>

<DIV>&nbsp;</DIV>

<DIV align=center><FONT STYLE="font-family: Times New Roman; font-size: small; color: #000000"><B>FORWARD-LOOKING STATEMENTS </B></FONT></DIV>

<P align=justify><FONT STYLE="font-family: 'Times New Roman, Times, Serif'; font-size: x-small">This press release may contain forward-looking
statements. These statements are statements that are not historical facts, and are based on management's current view and estimates of
future economic circumstances, industry conditions, company performance and financial results. The words "anticipates", "believes", "estimates",
"expects", "plans" and similar expressions, as they relate to the company, are intended to identify forward-looking statements. Statements
regarding the declaration or payment of dividends, the implementation of principal operating and financing strategies and capital expenditure
plans, the direction of future operations and the factors or trends affecting financial condition, liquidity or results of operations
are examples of forward-looking statements. Such statements reflect the current views of management and are subject to a number of risks
and uncertainties. There is no guarantee that the expected events, trends or results will actually occur. The statements are based on
many assumptions and factors, including general economic and market conditions, industry conditions, and operating factors. Any changes
in such assumptions or factors could cause actual results to differ materially from current expectations. </FONT></P>

<HR align=left color=#000000 SIZE=2 noShade>

</DIV>

<P></P>

</BODY>

</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>image_001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
begin 644 image_001.jpg
M_]C_X  02D9)1@ ! 0$ 8 !@  #_VP!#  @&!@<&!0@'!P<)"0@*#!0-# L+
M#!D2$P\4'1H?'AT:'!P@)"XG("(L(QP<*#<I+# Q-#0T'R<Y/3@R/"XS-#+_
MVP!# 0@)"0P+#!@-#1@R(1PA,C(R,C(R,C(R,C(R,C(R,C(R,C(R,C(R,C(R
M,C(R,C(R,C(R,C(R,C(R,C(R,C(R,C+_P  1"  !  $# 2(  A$! Q$!_\0
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!V0$!

end
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>image_002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
begin 644 image_002.jpg
M_]C_X  02D9)1@ ! 0$ 8 !@  #_VP!#  @&!@<&!0@'!P<)"0@*#!0-# L+
M#!D2$P\4'1H?'AT:'!P@)"XG("(L(QP<*#<I+# Q-#0T'R<Y/3@R/"XS-#+_
MVP!# 0@)"0P+#!@-#1@R(1PA,C(R,C(R,C(R,C(R,C(R,C(R,C(R,C(R,C(R
M,C(R,C(R,C(R,C(R,C(R,C(R,C(R,C+_P  1" !. +H# 2(  A$! Q$!_\0
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M<HP N1ZDCT.,X.:R/$<WVCQ/JTX&!)>3/^;DUZC\#H"MIK5QV>2)!_P$,?\
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MQ\6?^1LM_P#KR3_T-Z7X2_\ (UW7_7B__H<=)\6?^1LM_P#KR3_T-Z7X2_\
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MMF>":QX@U;7YA+JE_-<D'*JQPB\8^51P.G85N>%?AWK7B:1)?*:ST\\FZF7
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M7_"JO#W]^]_[^C_XFC_A57A[^_>_]_1_\31[.IW_ !#^U,G_ .?7_DB//?\
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M_P#$UZ%_PJKP]_?O?^_H_P#B:/\ A57A[^_>_P#?T?\ Q-'LZG?\0_M3)_\
MGU_Y(CSW_A8OBO\ Z"O_ )+Q?_$T?\+%\5_]!7_R7B_^)KT+_A57A[^_>_\
M?T?_ !-'_"JO#W]^]_[^C_XFCV=3O^(?VID__/K_ ,D1P5O\0O%,ES$C:KE6
M< C[/%TS_NU[K7%1_"WP_'*DBO>Y4AAF4=O^ UVM:TXR5^8\+-L3@Z[A]5CR
&VO?2Q__9

end
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
