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    ACCESSION NUMBER:		0001104659-22-041724
    CONFORMED SUBMISSION TYPE:	PRE 14A
    PUBLIC DOCUMENT COUNT:		39
    CONFORMED PERIOD OF REPORT:	20220525
    FILED AS OF DATE:		20220401
    DATE AS OF CHANGE:		20220401

    FILER:

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

    	FILING VALUES:
    		FORM TYPE:		PRE 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-13883
    		FILM NUMBER:		22798210

    	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
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    Document 4 - file: ic_smartphone-pn.jpg

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    <FILENAME>ph_petenelsonnew-bw.jpg
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    <FILENAME>ph_rickmagnusonnew-bw.jpg
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    Document 13 - file: ph_rickmagnusonnew-bw.jpg

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    <FILENAME>ph_scottmorrisnew-bw.jpg
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    Document 14 - file: ph_scottmorrisnew-bw.jpg

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    Document 15 - file: ph_shellyesquenew-bw.jpg

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    <FILENAME>ph_terrybayernew-bw.jpg
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    Document 16 - file: ph_terrybayernew-bw.jpg

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    Document 17 - file: ph_thomaskrummelnew-bw.jpg

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    Document 18 - file: sg_michellermortensen-bw.jpg

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    <FILENAME>sg_petercnelson-bw.jpg
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    Document 19 - file: sg_petercnelson-bw.jpg

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    <SEQUENCE>20
    <FILENAME>tm212302d1-icon_chairpn.jpg
    <DESCRIPTION>GRAPHIC
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    Document 20 - file: tm212302d1-icon_chairpn.jpg

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    <SEQUENCE>21
    <FILENAME>tm212302d1-icon_memberpn.jpg
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    Document 21 - file: tm212302d1-icon_memberpn.jpg

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    <DOCUMENT>
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    <SEQUENCE>22
    <FILENAME>tm212302d1-icon_roucrossbw.jpg
    <DESCRIPTION>GRAPHIC
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    Document 22 - file: tm212302d1-icon_roucrossbw.jpg

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    <FILENAME>tm212302d1-icon_routickpn.jpg
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    Document 23 - file: tm212302d1-icon_routickpn.jpg

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    <FILENAME>tm212302d1-icon_vicepn.jpg
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    Document 24 - file: tm212302d1-icon_vicepn.jpg

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    <SEQUENCE>25
    <FILENAME>tm223371d1-bc_boatenpn.jpg
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    Document 25 - file: tm223371d1-bc_boatenpn.jpg

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    <DOCUMENT>
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    <SEQUENCE>26
    <FILENAME>tm223371d1-bc_performpn.jpg
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    Document 26 - file: tm223371d1-bc_performpn.jpg

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    <FILENAME>tm223371d1-bc_summarypn.jpg
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    Document 27 - file: tm223371d1-bc_summarypn.jpg

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    <FILENAME>tm223371d1-bc_womenpn.jpg
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    Document 28 - file: tm223371d1-bc_womenpn.jpg

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    <SEQUENCE>29
    <FILENAME>tm223371d1-br_boaexppn.jpg
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    Document 29 - file: tm223371d1-br_boaexppn.jpg

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    <SEQUENCE>30
    <FILENAME>tm223371d1-fc_financepn.jpg
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    Document 30 - file: tm223371d1-fc_financepn.jpg

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    <SEQUENCE>31
    <FILENAME>tm223371d1-fr_boaindepn.jpg
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    Document 31 - file: tm223371d1-fr_boaindepn.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>tm223371d1-icon_42gendivpn.jpg
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    Document 32 - file: tm223371d1-icon_42gendivpn.jpg

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    <DOCUMENT>
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    <SEQUENCE>33
    <FILENAME>tm223371d1-icon_8ethdivpn.jpg
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    Document 33 - file: tm223371d1-icon_8ethdivpn.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>tm223371d1-pc_ceoneospn.jpg
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    <TEXT>
    Document 34 - file: tm223371d1-pc_ceoneospn.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>tm223371d1-pc_directorpn.jpg
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    Document 35 - file: tm223371d1-pc_directorpn.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>36
    <FILENAME>tm223371d1-pc_diverspn.jpg
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    Document 36 - file: tm223371d1-pc_diverspn.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>37
    <FILENAME>tm223371d1-pc_kropelnpn.jpg
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    <TEXT>
    Document 37 - file: tm223371d1-pc_kropelnpn.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>38
    <FILENAME>tm223371d1-px_01pagebw.jpg
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    Document 38 - file: tm223371d1-px_01pagebw.jpg

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    <FILENAME>tm223371d1-px_02pagebw.jpg
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    Document 39 - file: tm223371d1-px_02pagebw.jpg

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