<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001495768</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>


    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001035201</issuerCik>
      <issuerName>CALIFORNIA WATER SERVICE GROUP</issuerName>
      <secFileNumber>001-13883</secFileNumber>
      <issuerAddress>
        <com:street1>1720 N FIRST ST</com:street1>
        <com:street2>C/O CALIFORNIA WATER SERVICE CO</com:street2>
        <com:city>SAN JOSE</com:city>
        <com:stateOrCountry>CA</com:stateOrCountry>
        <com:zipCode>95112</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>4083678200</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Krummel Thomas M</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>THE CHARLES SCHWAB CORPORATION</name>
        <address>
          <com:street1>3000 Schwab Way</com:street1>
          <com:city>Westlake</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>76262</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>4995</noOfUnitsSold>
      <aggregateMarketValue>249755.00</aggregateMarketValue>
      <noOfUnitsOutstanding>57711000</noOfUnitsOutstanding>
      <approxSaleDate>11/02/2023</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <acquiredDate>11/19/2019</acquiredDate>
      <natureOfAcquisitionTransaction>RSU</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>4995</amountOfSecuritiesAcquired>
      <paymentDate>11/19/2019</paymentDate>
      <natureOfPayment>NA</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <remarks>FULL ACCOUNT DETAIL: T KRUMMEL &amp; S KRUMMEL TTEE THOMAS &amp; SUSAN KRUMEL FAM TR SHARES ACQUIRED VIA FOLLOWING DATE RANGE: 11/19/19 TO 1/4/22 This 144 electronic filing represents a trade that occurred on 11/2/23 per Trading Plan dated 6/21/23 and is being filed on 11/3/23 due to invalid Edgar Online credentials.</remarks>
    <noticeSignature>
      <noticeDate>11/03/2023</noticeDate>
      <planAdoptionDates>
        <planAdoptionDate>06/21/2023</planAdoptionDate>
      </planAdoptionDates>
      <signature>THOMAS KRUMMEL</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
[{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 3204}]
144
0001495768
XXXXXXXX
LIVE
0001035201
CALIFORNIA WATER SERVICE GROUP
001-13883
1720 N FIRST ST
C/O CALIFORNIA WATER SERVICE CO
SAN JOSE
CA
95112
4083678200
Krummel Thomas M
Director
COMMON
THE CHARLES SCHWAB CORPORATION
3000 Schwab Way
Westlake
TX
76262
4995
249755.00
57711000
11/02/2023
NYSE
COMMON
11/19/2019
RSU
ISSUER
N
4995
11/19/2019
NA
Y
FULL ACCOUNT DETAIL: T KRUMMEL & S KRUMMEL TTEE THOMAS & SUSAN KRUMEL FAM TR SHARES ACQUIRED VIA FOLLOWING DATE RANGE: 11/19/19 TO 1/4/22 This 144 electronic filing represents a trade that occurred on 11/2/23 per Trading Plan dated 6/21/23 and is being filed on 11/3/23 due to invalid Edgar Online credentials.
11/03/2023
06/21/2023
THOMAS KRUMMEL