    <SEC-DOCUMENT>0001104659-24-048350-index.html : 20240417
    <SEC-HEADER>0001104659-24-048350.hdr.sgml : 20240417
    <ACCEPTANCE-DATETIME>20240417163805
    ACCESSION NUMBER:		0001104659-24-048350
    CONFORMED SUBMISSION TYPE:	ARS
    PUBLIC DOCUMENT COUNT:		1
    CONFORMED PERIOD OF REPORT:	20231231
    FILED AS OF DATE:		20240417
    DATE AS OF CHANGE:		20240417
    EFFECTIVENESS DATE:		20240417

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			CALIFORNIA WATER SERVICE GROUP
    		CENTRAL INDEX KEY:			0001035201
    		STANDARD INDUSTRIAL CLASSIFICATION:	WATER SUPPLY [4941]
    		ORGANIZATION NAME:           	01 Energy & Transportation
    		IRS NUMBER:				770448994
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		ARS
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-13883
    		FILM NUMBER:		24851608

    	BUSINESS ADDRESS:
    		STREET 1:		1720 N FIRST ST
    		STREET 2:		C/O CALIFORNIA WATER SERVICE CO
    		CITY:			SAN JOSE
    		STATE:			CA
    		ZIP:			95112
    		BUSINESS PHONE:		4083678200

    	MAIL ADDRESS:
    		STREET 1:		1720 FIRST ST
    		STREET 2:		C/O CALIFORNIA WATER SERVICE CO
    		CITY:			SAN JOSE
    		STATE:			CA
    		ZIP:			95112
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>ARS
    <SEQUENCE>1
    <FILENAME>tm247200d2_ars.pdf
    <DESCRIPTION>ARS
    <TEXT>
    Document 1 - file: tm247200d2_ars.pdf

    </DOCUMENT>
    </SEC-DOCUMENT>