UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                   FORM 10-Q/A
                                  Amendment #1

(Mark One)

_X_      QUARTERLY  REPORT  PURSUANT  TO SECTION  13 OR 15(d) OF THE  SECURITIES
         EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2002

                                       OR

         TRANSITION  REPORT  PURSUANT  TO SECTION 13 OR 15(d) OF THE  SECURITIES
         EXCHANGE ACT OF 1934

For the transition period from___________________ to ______________

Commission file number 1-13883


                         CALIFORNIA WATER SERVICE GROUP
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)


           Delaware                                     77-0448994
- --------------------------------------------------------------------------------
(Sate or other jurisdiction                 (I.R.S. Employer identification No.)
of incorporation or organization)


1720 North First Street, San Jose, CA.                    95112
- --------------------------------------------------------------------------------
(Address of principal executive offices)               (Zip Code)


                                 1-408-367-8200
- --------------------------------------------------------------------------------
              (Registrant's telephone number, including area code)

                                 Not Applicable
- --------------------------------------------------------------------------------
              (Former name, former address and former fiscal year,
                         if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed  by  Section  13 or 15 (d) of the  Securities  Exchange  Act of 1934
during the preceding 12 months (or for such shorter  period that the  registrant
was  required  to file such  reports),  and (2) has been  subject to such filing
requirements for the past 90 days. Yes X No ___

APPLICABLE  ONLY TO  ISSUERS  INVOLVED  IN  BANKRUPTCY  PROCEEDINGS  DURING  THE
PRECEDING FIVE YEARS Indicate by check mark whether the registrant has filed all
documents  and reports  required to be filed by Sections  12, 13 or 15(d) of the
Securities  Exchange Act of 1934  subsequent to the  distribution  of securities
under a plan confirmed by a court. Yes ___ No ___

APPLICABLE ONLY TO CORPORATE ISSUERS

Indicate the number of shares  outstanding  of each of the  issuer's  classes of
common stock, as of the latest practicable date. Common shares outstanding as of
October 31, 2002 - 15,182,046.



                                EXPLANATORY NOTE

This  Form  10-Q/A is being  filed  for the sole  purpose  of  submitting  three
exhibits  that were listed in the Exhibit  Index to the  Registrant's  Quarterly
Report on Form  10-Q for the  period  ending  September  30,  2002.  The  listed
exhibits  were not attached to the original Form 10-Q  submission.  No revisions
have been made to the Registrant's  financial statements or any other disclosure
or certifications contained in the Quarterly Report.


PART II OTHER INFORMATION

Item 6. Exhibits and Reports on Form 8-K

(a) Exhibits required to be filed by this Item 601 of Regulation S-K.

The exhibit  list  required by this Item is  incorporated  by  reference  to the
Exhibit Index attached to this report.

(b) Reports on Form 8-K

None.

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                                   SIGNATURES

Pursuant to the  requirement  of the  Securities  and Exchange Act of 1934,  the
Registrant has duly caused this amended report to be signed on its behalf by the
undersigned thereunto duly authorized.


                         CALIFORNIA WATER SERVICE GROUP
                                   Registrant


November 13, 2002


                            By: /s/ Gerald F. Feeney
                                ----------------
                                Gerald F. Feeney
                     Vice President, Chief Financial Officer
                                  and Treasurer


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                                  Exhibit Index

(Exhibits included with this Form 10-Q/A filing were listed in the Exhibit Index
for the  original  Form 10-Q filing,  but the Exhibits  were not attached to the
original submission.)


Exhibit     Description                                                     Page

 4.1        Fourth  Supplement to Note Agreement  dated as of August 15,     5
            2002,  pertaining  to the issuance of  $20,000,000,  5.90%
            Series F Senior Notes due November 1, 2017

10.1        First  Amendment  dated September 23, 2002 to the Business       22
            Loan  Agreement  dated  August  1,  2001  between  Bank of
            America and California Water Service Company modifying the
            30-day out-of-debt period

10.2        Second  Amendment dated September 23, 2002 to the Business       25
            Loan  Agreement  dated  August  1,  2001  between  Bank of
            America and California Water Service Group and CWS Utility
            Services


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