UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                    FORM 10-Q

(Mark One)

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

For the quarterly period ended March 31, 2005

                                            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)

                                  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 ___

Indicate by checkmark whether the Registrant is an accelerated filer (as defined
in rule 12b-2 of the Act) Yes X No __

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
May 2, 2005 - 18,372,496.





TABLE OF CONTENTS

                                                                                     Page
                                                                                     ----
                                                                                   
PART I  Financial Information

Item 1           Financial Statements...............................................   3

                 Condensed Consolidated Balance Sheets (unaudited)
                   March 31, 2005 and December 31, 2004.............................   4

                 Condensed Consolidated Statements of Income  (unaudited)
                   For the Three Months Ended March 31, 2005 and 2004...............   5

                 Condensed Consolidated Statements of Cash Flows (unaudited)
                   For the Three Months Ended March 31, 2005 and 2004...............   6

                 Notes to Condensed Consolidated Financial Statements...............   7

Item 2           Management's Discussion and Analysis of Financial Condition
                   and Results of Operations........................................  13

Item 3           Quantitative and Qualitative Disclosure about Market Risk..........  25

Item 4           Controls and Procedures............................................  25


PART II Other Information

Item 1           Legal Proceedings..................................................  26

Item 4           Submission of Matters to a Vote of Security Holders................  26


Item 6           Exhibits...........................................................  27

                 Signatures.........................................................  28

                 Index to Exhibits..................................................  29


                                       2


PART I        FINANCIAL INFORMATION

Item 1.

FINANCIAL STATEMENTS

         The  condensed  consolidated  financial  statements  presented  in this
         filing on Form 10-Q have been prepared by management and are unaudited.




                                       3


CALIFORNIA WATER SERVICE GROUP
CONDENSED CONSOLIDATED BALANCE SHEETS
Unaudited
(In thousands, except per share data)

                                                                                                March 31,               December 31,
                                                                                                  2005                     2004
                                                                                               -----------              -----------
                                                                                                                  
ASSETS
Utility plant:
         Utility plant                                                                         $ 1,160,399              $ 1,144,074
         Less accumulated depreciation and amortization                                            350,884                  343,769
                                                                                               -----------              -----------
               Net utility plant                                                                   809,515                  800,305
                                                                                               -----------              -----------
Current assets:
         Cash and cash equivalents                                                                  28,298                   18,820
         Receivables:
                    Customers                                                                       13,626                   15,867
                    Income taxes                                                                      --                      7,298
                    Other                                                                            3,422                    3,147
         Unbilled revenue                                                                            8,391                    9,307
         Materials and supplies at average cost                                                      3,396                    3,161
         Prepaid pension expense                                                                     1,976                    3,671
         Taxes and other prepaid expenses                                                            7,866                    9,122
                                                                                               -----------              -----------
                 Total current assets                                                               66,975                   70,393
                                                                                               -----------              -----------
Regulatory assets
                                                                                                    54,325                   53,477
Other assets                                                                                        19,575                   18,678
                                                                                               -----------              -----------
                                                                                               $   950,390              $   942,853
                                                                                               ===========              ===========
CAPITALIZATION AND LIABILITIES
Capitalization:
         Common stock, $.01 par value                                                          $       184              $       184
         Additional paid-in capital                                                                131,418                  131,271
         Retained earnings                                                                         152,257                  156,851
         Accumulated other comprehensive loss                                                         (701)                    (701)
                                                                                               -----------              -----------
               Total common stockholders' equity                                                   283,158                  287,605
         Preferred stock                                                                             3,475                    3,475
         Long-term debt, less current maturities                                                   274,414                  274,821
                                                                                               -----------              -----------
               Total capitalization                                                                561,047                  565,901
                                                                                               -----------              -----------
Current liabilities:
         Current maturities of long-term debt                                                        1,100                    1,100
         Short-term borrowings                                                                        --                       --
         Accounts payable                                                                           23,134                   19,745
         Accrued expenses and other liabilities                                                     42,545                   36,367
                                                                                               -----------              -----------
               Total current liabilities                                                            66,779                   57,212

Unamortized investment tax credits                                                                   2,721                    2,721
Deferred income taxes                                                                               54,555                   54,826
Regulatory and other liabilities                                                                    36,072                   35,986
Advances for construction                                                                          133,906                  131,292
Contributions in aid of construction                                                                95,310                   94,915
Commitments and contingencies                                                                         --                       --
                                                                                               -----------              -----------
                                                                                               $   950,390              $   942,853
                                                                                               ===========              ===========
<FN>
See Accompanying Notes to Unaudited Condensed  Consolidated Financial Statements
</FN>



                                       4


CALIFORNIA WATER SERVICE GROUP
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
Unaudited
(In thousands, except per share data)

For the three months ended:                                                                         March 31,              March 31,
                                                                                                      2005                    2004
                                                                                                    --------               --------
                                                                                                                     
Operating revenue                                                                                   $ 60,303               $ 60,240
                                                                                                    --------               --------
Operating expenses:
     Water production costs                                                                           19,821                 21,161
     Other operations                                                                                 21,943                 20,337
     Maintenance                                                                                       3,658                  3,181
     Depreciation and amortization                                                                     6,996                  6,518
     Income taxes                                                                                        455                    958
     Property and other taxes                                                                          2,965                  2,694
                                                                                                    --------               --------
            Total operating expenses                                                                  55,838                 54,849
                                                                                                    --------               --------

            Net operating income                                                                       4,465                  5,391
                                                                                                    --------               --------
Other income and expenses:
            Non-regulated income, net                                                                    638                    550
            Gain (loss) on sale of non-utility property                                                   (2)                     1
                                                                                                    --------               --------
            Total other income and expenses                                                              636                    551
                                                                                                    --------               --------

Interest expense:
     Interest expense                                                                                  4,646                  4,646
     Less: capitalized interest                                                                          225                    150
                                                                                                    --------               --------
            Total interest expense                                                                     4,421                  4,496
                                                                                                    --------               --------

Net income                                                                                          $    680               $  1,446
                                                                                                    ========               ========

Earnings per share
     Basic                                                                                          $   0.03               $   0.08
                                                                                                    ========               ========
     Diluted                                                                                        $   0.03               $   0.08
                                                                                                    ========               ========


Weighted average shares outstanding
     Basic                                                                                            18,371                 16,932
                                                                                                    ========               ========
     Diluted                                                                                          18,403                 16,953
                                                                                                    ========               ========
Dividends per share of common stock                                                                 $ 0.2850               $ 0.2825
                                                                                                    ========               ========
<FN>
See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements
</FN>


                                       5


CALIFORNIA WATER SERVICE GROUP
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Unaudited
(In thousands)

For the three months ended:                                                                           March 31,            March 31,
                                                                                                        2005                 2004
                                                                                                      --------             --------
                                                                                                                     
Operating activities
           Net income                                                                                 $    680             $  1,446
                                                                                                      --------             --------
           Adjustments to reconcile net income to net cash
             Provided by operating activities:
                   Depreciation and amortization                                                         6,996                6,518
                   Deferred income taxes, investment tax credits
                           regulatory assets and liabilities, net                                       (1,061)                (175)
                   Gain  (loss) on sale of non-utility property                                              2                   (1)
                   Changes in operating assets and liabilities:
                           Receivables                                                                   9,264                4,353
                           Unbilled revenue                                                                916                  407
                           Taxes and other prepaid expenses                                              2,951                 (649)
                           Accounts payable                                                              3,389               (5,512)
                           Other current assets                                                           (235)                  82
                           Other current liabilities                                                     6,177                4,176
                           Other changes, net                                                             (527)              (1,107)
                                                                                                      --------             --------
                           Net adjustments                                                              27,872                8,092
                                                                                                      --------             --------
           Net cash provided by operating activities
                                                                                                        28,552                9,538
                                                                                                      --------             --------
Investing activities:
           Utility plant expenditures:
                   Company funded                                                                      (14,743)              (8,168)
                   Developer funded                                                                     (2,540)              (3,444)
           Proceeds from sale of non-utility property                                                     --                      6
                                                                                                      --------             --------
           Net cash used by investing activities                                                       (17,283)             (11,606)
                                                                                                      --------             --------
Financing activities:
           Net short-term borrowings                                                                      --                  3,346
           Payment of long-term debt                                                                      (407)                (183)
           Advances for construction                                                                     3,688                2,652
           Refunds of advances for construction                                                         (1,074)              (1,223)
           Contributions in aid of construction                                                          1,129                1,528
           Issuance of common stock                                                                        147                 --
           Dividends paid                                                                               (5,274)              (4,822)
                                                                                                      --------             --------
           Net cash (used in) provided by financing activities                                          (1,791)               1,298
                                                                                                      --------             --------

Change in cash and cash equivalents                                                                      9,478                 (770)
Cash and cash equivalents at beginning of period                                                        18,820                2,856
                                                                                                      --------             --------
Cash and cash equivalents at end of period                                                            $ 28,298             $  2,086
                                                                                                      ========             ========
<FN>
See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements
</FN>


                                       6



                         CALIFORNIA WATER SERVICE GROUP
              Notes to Condensed Consolidated Financial Statements
                                 March 31, 2005


Note 1.  Organization and Operations
     California Water Service Group (the Company) is a holding company with five
     wholly owned  subsidiaries  that provide  water  utility and other  related
     services in California, Washington, New Mexico and Hawaii. California Water
     Service Company (Cal Water),  Washington Water Service Company  (Washington
     Water),  New Mexico Water Service  Company (New Mexico  Water),  and Hawaii
     Water Service  Company,  Inc.  (Hawaii  Water)  provide  regulated  utility
     services  under the  rules  and  regulations  of their  respective  state's
     regulatory  commissions.  In  addition,  these  entities  and  CWS  Utility
     Services provide non-regulated water utility and utility-related services.

     The Company  operates  primarily in one business  segment  providing  water
     utility services.


Note 2.  Summary of Significant Accounting Policies
     The  interim  financial  information  is  unaudited.   In  the  opinion  of
     management,  the accompanying  condensed  consolidated financial statements
     reflect all adjustments  that are necessary to provide a fair  presentation
     of the results for the periods  covered.  The  adjustments  consist only of
     normal  recurring  adjustments.  The results  for  interim  periods are not
     necessarily  indicative  of the results of the entire year.  The  condensed
     consolidated  financial  statements  should be read in conjunction with the
     Company's consolidated financial statements for the year ended December 31,
     2004,  included in its Form 10-K as filed with the  Securities and Exchange
     Commission on March 15, 2005.


Note 3.  Stock-based Compensation
     The Company had a stockholder-approved  Long-Term Incentive Plan (which was
     replaced on April 27,  2005,  by a  stockholder-approved  Equity  Incentive
     Plan) that allows granting of non-qualified stock options.  The Company has
     adopted the disclosure  requirements  of Statement of Financial  Accounting
     Standards  (SFAS) No. 123,  "Accounting for Stock-Based  Compensation,"  as
     amended  by SFAS  No.  148,  "Accounting  for  Stock-Based  Compensation  -
     Transition  Disclosure - An Amendment  of FASB  Statement  No. 123," and as
     permitted by SFAS No. 123, applies Accounting  Principles Board Opinion No.
     25,   "Accounting  for  Stock  Issued  to  Employees,"  to  its  plan.  All
     outstanding  options had an exercise price equal to the market price on the
     date they were granted. No compensation  expense was recorded for either of
     the  three-month  periods  ended March 31,  2005 and 2004  related to stock
     options. No options were granted during either period.

     The table below illustrates the effect on net income and earnings per share
     as if the Company had applied the fair value recognition  provision of SFAS
     No. 123 to employee compensation.

                                       7



(In thousands, except per share data)

                                                                  Three Months
                                                                     Ended
                                                                    March 31
                                                               -----------------
                                                                2005      2004
                                                               ------   --------
Net income, as reported                                        $  680   $  1,446
Less preferred dividends                                           38         38
                                                               ------   --------
Net income available to common stockholders                       642      1,408
Deduct:  Total stock-based employee compensation
     expense determined under fair value
     method for all awards, net of related tax effects             12         17
                                                               ------   --------
Pro forma net income available to
    common stockholders                                        $  630   $  1,391
                                                               ======   ========

Earnings per share
          Basic - as reported                                   $0.03      $0.08
          Basic - pro forma                                     $0.03      $0.08

          Diluted - as reported                                 $0.03      $0.08
          Diluted - pro forma                                   $0.03      $0.08


Note 4.  Seasonal Business
     Due to the seasonal nature of the water  business,  the results for interim
     periods  are not  indicative  of the  results  for a  twelve-month  period.
     Revenue and income are generally higher in the warm, dry summer months when
     water  usage and sales are  greater.  Revenue  and  income are lower in the
     winter months when cooler temperatures and rainfall curtail water usage and
     sales.


Note 5.  Earnings Per Share Calculations
     The computations of basic and diluted earnings per share are noted below.

     Common stock options to purchase  116,250 and 149,250  shares for the three
     months ended March 31, 2005 and 2004, respectively, were outstanding.



                                       8


      (In thousands, except per share data)

                                                                Three Months
                                                               Ended March 31
                                                             -------------------
                                                              2005        2004
                                                             -------     -------
     Net income                                              $   680     $ 1,446
     Less preferred dividends                                     38          38
                                                             -------     -------
     Net income available to common stockholders             $   642     $ 1,408
                                                             =======     =======

     Weighted average common shares, basic                    18,371      16,932
     Dilutive common stock options (treasury method)              32          21
                                                             -------     -------
     Shares used for dilutive computation                     18,403      16,953
                                                             =======     =======

     Net income per share - basic                            $  0.03     $  0.08
                                                             -------     -------
     Net income per share - diluted                          $  0.03     $  0.08
                                                             -------     -------


Note 6.  Pension Plan and Other Postretirement Benefits
     The Company provides a qualified, defined-benefit, non-contributory pension
     plan  for   substantially   all   employees.   The  Company   makes  annual
     contributions  to fund the amounts accrued for the qualified  pension plan.
     The  Company  also  maintains  an  unfunded,  non-qualified,   supplemental
     executive  retirement  plan.  The costs of the plans are charged to expense
     and utility plant.

     The Company offers medical, dental, vision, and life insurance benefits for
     retirees and their spouses and dependents. Participants are required to pay
     a premium, which offsets a portion of the cost.

     Payments by the Company  related to pension  plan and other  postretirement
     benefits  were  $74,000  for the three  months  ended March 31,  2005.  The
     estimated funding for 2005 is $7,100,000.

     The  following  table  lists  components  of the  pension  plans  and other
     postretirement  benefits. The data listed under "pension plan" includes the
     qualified  pension  plan  and  the  non-qualified   executive  supplemental
     retirement  plan.  The data listed under "other  benefits" is for all other
     post retirement benefits.


                                       9



     (In thousands)
                                                  Three Months Ended March 31
                                               Pension Plan         Other Benefits
                                            ------------------    ------------------
                                              2005       2004       2005       2004
                                            -------    -------    -------    -------
                                                                 
     Service cost                           $ 1,194    $ 1,137    $   443    $   305
     Interest cost                            1,499      1,364        448        342

     Expected return on plan assets          (1,378)    (1,219)       (97)       (86)
     Recognized net initial APBO                N/A        N/A         69         69
     Amortization of prior service cost         487        424         19         19
     Recognized net actuarial (gain) loss        54         34        195         84
                                            -------    -------    -------    -------

     Net periodic benefit cost              $ 1,856    $ 1,740    $ 1,077    $   733
                                            =======    =======    =======    =======


     APBO - Accumulated postretirement benefit obligation

     The "other  benefits"  amount of $1,077,000 for the quarter ended March 31,
     2005, includes a reduction of $182,000 representing the estimated reduction
     for Medicare  subsidies to comply with FASB Staff Position (FSP) No. 106-2,
     "Accounting   and   Disclosure   Requirements   Related  to  the   Medicare
     Prescription  Drug,  Improvement and  Modernization Act of 2003," which was
     implemented by the Company in the third quarter of 2004. Therefore, no such
     reduction  was  estimated  for the amounts as shown for the  quarter  ended
     March 31, 2004.

     Postretirement  benefit expense for "other benefits"  recorded in the first
     quarter of 2005 and 2004 was $257,000  and  $388,000,  respectively.  As of
     March 31, 2005, the Company had a regulatory asset of $9,814,000 related to
     postretirement  benefits,  which is expected to be recovered through future
     customer rates.

Note 7. Gains on Sale of Property

     In  1995,   the   California   Legislature   enacted   the  Water   Utility
     Infrastructure  Improvement Act of 1995  (Infrastructure  Act) to encourage
     water  utilities  to sell surplus  properties  and reinvest in needed water
     utility  facilities.  In September  2003, the California  Public  Utilities
     Commission  (CPUC)  issued  decision  D.03-09-021  in Cal Water's  2001 GRC
     filing. In this decision, the CPUC ordered Cal Water to file an application
     setting up an  Infrastructure  Act  memorandum  account with an  up-to-date
     accounting  of all real property that was at any time in rate base and that
     Cal Water had sold  since the  effective  date of the  Infrastructure  Act.
     Additionally,  the  decision  directed  the CPUC  staff to file a  detailed
     report on its review of Cal Water's  application.  On January 11, 2005, the
     Office of Ratepayers Advocates (ORA) issued a report expressing its opinion
     that Cal Water had not proven that surplus  properties sold since 1996 were
     no longer  used and  useful.  The ORA  recommended  that Cal Water be fined
     $160,000  and that gains  from  property  sales  should  generally  benefit
     ratepayers.

                                       10


     During the period under review,  Cal Water's  cumulative gains from surplus
     property sales were $19.2 million,  which  included an  inter-company  gain
     related to a  transaction  with Utility  Services and a like-kind  exchange
     with a third party. If the CPUC finds any surplus property sale or transfer
     was recorded inappropriately, Cal Water's rate base could be reduced, which
     would lower future  revenues,  net income,  and cash flows. In early April,
     the parties submitted testimony and briefs and the Administrative Law Judge
     held an  evidentiary  hearing.  The  Company  expects to receive a proposed
     decision sometime within the second or third quarter.  Management  believes
     it  has  fully  complied  with  the   Infrastructure  Act  and  that  ORA's
     conclusions  and  recommendations  are without merit.  Cal Water intends to
     vigorously oppose ORA's findings.  Accordingly, Cal Water has not accrued a
     liability in the financial  statements for ORA's  recommendations.  At this
     time, Cal Water does not know how the CPUC will rule in this matter.

Note 8.  Recent Accounting Standards

     In November 2004, the Financial  Accounting  Standards  Board (FASB) issued
     Statements of Financial  Accounting  Standards  (SFAS) No. 151,  "Inventory
     Costs - an Amendment to ARB no. 43, Chapter 4." The statement clarifies the
     accounting for abnormal amounts of idle facility expense, freight, handling
     costs,  and wasted  material.  The  statement is effective for fiscal years
     beginning  after June 15,  2005.  The  adoption  of this  statement  is not
     expected to impact the Company's financial position,  results of operations
     or cash flows.

     In December  2004,  the FASB issued SFAS No. 153,  "Exchange of Nonmonetary
     Assets." The  statement  amends  Opinion 29 to eliminate  the exception for
     nonmonetary exchanges of similar productive assets and replaces it with the
     general  exception  for  exchanges of  nonmonetary  assets that do not have
     commercial substance. The statement is effective for fiscal years beginning
     after June 15,  2005.  The  adoption of this  statement  is not expected to
     impact the Company's  financial  position,  results of operations,  or cash
     flows.

     In December 2004, the FASB issued SFAS No. 123 (revised 2004), "Share-Based
     Payment," which revised FAS 123, "Accounting for Stock-Based Compensation."
     The  statement  requires a public  entity to measure  the cost of  employee
     services  received in exchange for an award of equity  instruments based on
     the grant-date fair value of the award (with limited exceptions).  On April
     14, 2005,  the SEC revised the  effective  date to fiscal  years  beginning
     after June 15,  2005.  The  adoption of this  statement  is not expected to
     materially impact the Company's financial position,  results of operations,
     or cash flows for the equity instruments previously granted.

     In December  2004,  the FASB issued FASB Staff  Position  (FSP) No.  109-1,
     "Application  of FASB Statement No. 109,  Accounting for Income Tax, to the
     Tax Deduction on Qualified  Production  Activities Provided by the American
     Jobs  Creation  Act of  2004."  FSP  No.  109-1  provides  guidance  on the
     application  of SFAS No.  109 to the  provision  within the  American  Jobs
     Creation  Act of 2004 (the Act) that allows a tax  deduction  on  qualified


                                       11


     production  activities.  The guidance  states that the deduction  should be
     accounted for as a special  deduction in accordance  with SFAS No. 109. The
     adoption  of  this  guidance  is not  expected  to  materially  impact  the
     Company's financial position, results of operations or cash flows.

     In March 2005, the FASB issued Interpretation No. 46R-5, "Implicit Variable
     Interests under FASB  Interpretation  No. 46 (revised December 2003), which
     amend Interpretation No.46,  "Consolidation of Variable Interest Entities."
     The revision  relates to issues  commonly  arising in leasing  arrangements
     among related parties and other types of arrangements involving related and
     unrelated  parties.  The original guidance under  Interpretation  No. 46 in
     January 2003 is still applicable.  Interpretation Nos. 46 and 46R-5 provide
     guidance for determining when a primary  beneficiary  should  consolidate a
     variable interest entity or equivalent  structure that functions to support
     the  activities  of a  primary  beneficiary.  Interpretation  No.  46R-5 is
     effective for the first reporting period beginning after March 3, 2005. The
     adoption of Interpretation No. 46R-5 did not impact the Company's financial
     position, results of operations, or cash flows.

     In March  2005,  the FASB issued  Interpretation  No. 47,  "Accounting  for
     Conditional  Asset  Retirement  Obligations  - an  interpretation  of  FASB
     Statement No. 143."  Interpretation No. 47 provides guidelines as to when a
     company is required to record a conditional asset retirement obligation. In
     general,  an entity is required to recognize a liability for the fair value
     of a  conditional  asset  retirement  obligation  if the fair  value of the
     liability  can be reasonably  estimated.  The fair value of a liability for
     the  conditional  asset  retirement  obligation  should be recognized  when
     incurred - generally upon  acquisition,  construction,  or development  and
     (or)  through the normal  operation  of the asset.  The  Interpretation  is
     effective no later than the end of fiscal  years ending after  December 15,
     2005 (December 31, 2005, for calendar-year enterprises). The implementation
     of this  Interpretation  is not  expected to have a material  impact on the
     Company's financial position, results of operations, or cash flows.



                                       12

Item 2

MANAGEMENT'S DISCUSSION AND ANALYSIS OF
FINANCIAL CONDITION AND RESULTS OF OPERATIONS

FORWARD LOOKING STATEMENTS

     This quarterly report,  including all documents  incorporated by reference,
     contains  forward-looking  statements within the meaning established by the
     Private Securities Litigation Reform Act of 1995 (Act). The forward-looking
     statements  are  intended  to  qualify  under  provisions  of  the  federal
     securities  laws  for  "safe  harbor"  treatment  established  by the  Act.
     Forward-looking  statements are based on currently  available  information,
     expectations,  estimates,  assumptions and  projections,  and  management's
     judgment  about  the  Company,  the water  utility  industry,  and  general
     economic  conditions.  Such words as  expects,  intends,  plans,  believes,
     estimates,   assumes,   anticipates,   projects,   predicts,  forecasts  or
     variations  of such words or similar  expressions  are intended to identify
     forward-looking   statements.   The  forward-looking   statements  are  not
     guarantees  of future  performance.  They are  subject to  uncertainty  and
     changes in  circumstances.  Actual results may vary materially from what is
     contained in a forward-looking statement.

     Factors  that may cause a result  different  than  expected or  anticipated
     include:  governmental  and regulatory  commissions'  decisions,  including
     decisions  on  proper  disposition  of  property;   changes  in  regulatory
     commissions'   policies  and  procedures;   the  timeliness  of  regulatory
     commissions'  actions concerning rate relief; new legislation;  the ability
     to  satisfy  requirements  related  to the  Sarbanes-Oxley  Act  and  other
     regulations on internal controls;  electric power interruptions;  increases
     in suppliers'  prices and the availability of supplies  including water and
     power;  fluctuations in interest rates; changes in environmental compliance
     and  water   quality   requirements;   acquisitions   and  the  ability  to
     successfully  integrate  acquired  companies;  the ability to  successfully
     implement  business  plans;  changes in customer  water use  patterns;  the
     impact  of  weather  on  water  sales  and  operating  results;  access  to
     sufficient  capital on satisfactory  terms; civil disturbances or terrorist
     threats or acts, or apprehension  about the possible future  occurrences of
     acts of this type;  the  involvement  of the United  States in war or other
     hostilities;  restrictive  covenants in or changes to the credit ratings on
     current or future debt that could  increase  financing  costs or affect the
     ability to borrow, make payments on debt, or pay dividends; and other risks
     and unforeseen events.  When considering  forward-looking  statements,  the
     reader  should  keep in mind the  cautionary  statements  included  in this
     paragraph.  For  additional  information  relating  to  the  risks  of  the
     Company's  business,  see "Risk Factors" in the Company's  Annual Report on
     Form 10-K.  The Company  assumes no obligation to provide public updates on
     forward-looking statements.

CRITICAL ACCOUNTING POLICIES

     The Company maintains its accounting  records in accordance with accounting
     principles  generally  accepted  in the  United  States of  America  and as
     directed by the regulatory commissions to which we are subject. The process


                                       13


     of preparing financial statements requires the use of estimates on the part
     of  management.  The estimates  used by management  are based on historical
     experience  and  an  understanding  of  current  facts  and  circumstances.
     Management  believes  that the following  accounting  policies are critical
     because they involve a higher  degree of complexity  and judgment,  and can
     have  a  material  impact  on  our  results  of  operations  and  financial
     condition.

Revenue Recognition
- -------------------

     Revenue consists of monthly cycle customer billings for regulated water and
     wastewater  services at rates authorized by the governmental and regulatory
     commissions (Commissions) and billings to certain non-regulated customers.

     Revenue  from metered  customers  includes  billings to customers  based on
     monthly  meter  readings  plus an  estimate  for  water  used  between  the
     customer's  last meter  reading and the end of the  accounting  period.  At
     March 31, 2005, the unbilled  revenue amount was $8,391,000 and at December
     31,  2004,  the amount  was  $9,307,000.  The  unbilled  revenue  amount is
     generally higher during the summer months when water sales are higher.  The
     amount recorded as unbilled  revenue varies depending on water usage in the
     preceding  period;  the number of days between meter reads for each billing
     cycle;  and the number of days between each cycle's  meter  reading and the
     end of the accounting cycle.

     Flat rate  customers  are billed in advance at the beginning of the service
     period.  The revenue is prorated so that the portion of revenue  applicable
     to the current accounting period is included in that period's revenue.  The
     portion related to a subsequent  accounting  period is recorded as unearned
     revenue on the balance  sheet and  recognized as revenue when earned in the
     subsequent accounting period. The unearned revenue liability was $2,229,000
     at March 31, 2005 and  $2,193,000 at December 31, 2004.  This  liability is
     included in "accrued expenses and other liabilities" on the balance sheet.

Expense-Balancing and Memorandum Accounts
- -----------------------------------------
     Expense-balancing  accounts  and  memorandum  accounts  are  used to  track
     suppliers'  rate changes for purchased  water,  purchased  power,  and pump
     taxes that are not included in customer  water rates.  The cost changes are
     referred to as "offsetable  expenses," because under certain circumstances,
     they are  refundable  from  customers  (or refunded to customers) in future
     rates designed to offset cost changes from suppliers.  The Company does not
     record the balancing  and  memorandum  accounts  until the  commission  has
     authorized a change in customer rates and the customer has been billed. The
     cumulative  net amount in the expense  balancing  accounts  and  memorandum
     accounts as of March 31, 2005, was  approximately  $6,784,000.  This amount
     includes certain amounts that have been filed for recovery but have not yet
     been authorized,  or amounts that have not yet been filed for recovery. See
     Regulatory  Matters for  cumulative  net balances of expense  balancing and
     memorandum accounts that have been authorized for recovery.

                                       14

Regulated Utility Accounting
- ----------------------------
     Because the Company operates  extensively in a regulated  business,  we are
     subject to the  provisions of SFAS No. 71,  "Accounting  for the Effects of
     Certain Types of Regulation."  Regulators establish rates that are expected
     to permit the  recovery of the cost of service and a return on  investment.
     In the event a portion of the Company's  operations  were no longer subject
     to the provisions of SFAS No. 71, it would be required to write off related
     regulatory assets and liabilities that are not specifically recoverable and
     determine if other assets  might be  impaired.  If a regulatory  commission
     determined  that a portion of the Company's  assets were not recoverable in
     customer  rates,  it would be  required  to  determine  if the  Company had
     suffered an asset impairment that would require a write-down in the assets'
     valuation. There have been no such asset impairments as of March 31, 2005.

Income Taxes
- ------------
     The Company accounts for income taxes using the asset and liability method.
     Deferred  taxes  assets  and  liabilities  are  recognized  for  future tax
     consequences  attributable to differences  between the financial  statement
     carrying  amounts of existing assets and  liabilities and their  respective
     tax bases.  Measurement  of the deferred tax assets and  liabilities  is at
     enacted tax rates expected to apply to taxable income in the years in which
     those temporary  differences  are expected to be recovered or settled.  The
     effect on the deferred tax assets and  liabilities  of a change in tax rate
     is recognized in the period that includes the enactment  date.  The Company
     must also assess the likelihood  that deferred tax assets will be recovered
     in future  taxable  income  and,  to the extent  recovery  is  unlikely,  a
     valuation  allowance  would be  recorded.  If a  valuation  allowance  were
     required,   it  could   significantly   increase  income  tax  expense.  In
     management's view, a valuation allowance is not required at March 31, 2005.

     The Company  anticipates  that future rate action by the  Commissions  will
     reflect revenue  requirements for the tax effects of temporary  differences
     recognized,  which have  previously  been passed through to customers.  The
     commissions  have  granted  the  Company  rate  increases  to  reflect  the
     normalization  of the tax benefits of the federal  accelerated  methods and
     available  Investment  Tax Credits  (ITC) for all assets  placed in service
     after 1980.  ITC are deferred and  amortized  over the lives of the related
     properties for book purposes.

     Advances for Construction and Contributions in Aid of Construction received
     from  developers  subsequent  to 1986 were  taxable for federal  income tax
     purposes,  and those received subsequent to 1991 were subject to California
     income tax. In 1996,  the federal law,  and in 1997,  the  California  law,
     changed and only  deposits for new  services  were  taxable.  In late 2000,
     federal  regulations  were further  modified to exclude fire  services from
     tax.

Pension Benefits
- ----------------
     The Company  incurs costs  associated  with our pension and  postretirement
     health care  benefits  plans.  To measure  the  expense of these  benefits,
     management must estimate  compensation  increases,  mortality rates, future
     health cost increases and discount rates used to value related  liabilities
     and  to  determine   appropriate  funding.   Different  estimates  used  by
     management could result in significant variances in the cost recognized for
     pension  benefit  plans.   The  estimates  used  are  based  on  historical
     experience,  current facts, future  expectations,  and recommendations from


                                       15


     independent advisors and actuaries.  The Company uses an investment advisor
     to  provide  advice  in  managing  the  plan's  investments.   The  Company
     anticipates  any  increase in funding  for the  pension and  postretirement
     health care benefits plans will be recovered in future customer rates.







                                       16

RESULTS  OF  FIRST  QUARTER  2005  OPERATIONS  COMPARED  TO FIRST  QUARTER  2004
OPERATIONS

Summary
- -------
     First quarter net income was $680,000, equivalent to $0.03 per common share
     on a diluted  basis,  compared to net income of  $1,446,000 or $0.08 common
     per share on a diluted basis in the first quarter of 2004.

Operating Revenue
- -----------------
     Operating revenue increased $63,000 or .1% to $60,303,000.  As disclosed in
     the  following  table,  most of the  increase was due to increases in rates
     offset by a  decrease  in usage by  existing  customers.  Weather  impacted
     revenues during the quarter as all three months had lower  temperatures and
     higher  rainfall  than in the same  time  period  last  year.  The  Company
     experienced  a 13% decrease in water usage for the quarter  compared to the
     prior year, with the largest decrease, 20%, in March.

     The factors that  impacted the  operating  revenue for the first quarter of
     2005 are presented in the following table:


         Rate increases                                             $ 2,032,000
         Usage by new customers                                         844,000
         Decrease in usage by existing customers                     (2,813,000)
                                                                    -----------
              Net operating revenue increase                        $    63,000
                                                                    ===========


         The components of the rate increases are listed in the following table:

         2002 General Rate Case (GRC)                               $   927,000
         Purchased water offset                                         182,000
         2001 GRC catch-up                                             (890,000)
         Step rates                                                     940,000
         Balancing accounts                                             715,000
         2003 GRC                                                        74,000
         Hawthorne                                                       84,000
                                                                    -----------
              Total increase in rates                               $ 2,032,000
                                                                    ===========

     Incorporating  all the  approved  filings to date as listed in  "Regulatory
     Matters,"  management estimates the impact to revenues for the full year of
     2005 as compared to 2004 to be approximately $7 million increase,  assuming
     similar  usage.  This estimate does not include  filings which are expected
     during 2005.


                                       17


Total Operating Expenses
- ------------------------
     Total operating  expenses were $55,838,000 for the three months ended March
     31, 2005, versus $54,849,000 for the same period in 2004, a 2% increase.

     Water production expense consists of purchased water,  purchased power, and
     pump  taxes.  It  represents  the  largest  component  of  total  operating
     expenses,  accounting for  approximately  36% of total operating  expenses.
     Water production expenses decreased 6% compared to last year.

     For  California  operations,  sources of water as a percent of total  water
     production are listed on the following table:

                                                     Three Months Ended March 31
                                                     ---------------------------
                                                        2005           2004
                                                        ----           ----
             Well production                              42%            40%
             Purchased                                    53%            56%
             Surface                                       5%             4%
                                                         ---            ---
             Total                                       100%           100%
                                                         ===            ===

     Washington  Water,  New Mexico  Water and Hawaii  Water obtain all of their
     water supply from wells. The components of water production costs are shown
     in the table below:

                                              Three Months Ended March 31
                                      -----------------------------------------
                                          2005           2004          Change
                                      -----------    -----------    -----------
             Purchased water          $15,744,000    $16,361,000    ($  617,000)
             Purchased power            2,937,000      3,595,000       (658,000)
             Pump taxes                 1,140,000      1,205,000        (65,000)
                                      -----------    -----------    -----------
                  Total               $19,821,000    $21,161,000    ($1,340,000)
                                      ===========    ===========    ===========

     Purchased water, purchased power, and pump tax costs decreased due to lower
     customer  water usage  because of higher than  normal  rainfall  throughout
     California during the quarter.  Total water production measured in millions
     of gallons  decreased  by 13% during the first  quarter of 2005 as compared
     with the first  quarter of 2004 due to the  weather.  There were 33 days of
     rainfall  during  the first  quarter of 2005,  compared  to 22 for the same
     quarter of the prior  year.  Included in the  purchased  water cost for the
     quarter  ended March 31, 2004,  was a credit of  $1,381,000  received  from
     certain  wholesale   suppliers  for  the  Company's   Southern   California
     districts.  Also  included in the last year's  purchased  water cost was an
     additional expense of $840,000 for a settlement related to a reported meter
     malfunction at the wholesale supplier in the Stockton district.

     Operations  expenses  excluding water  production  costs were  $21,943,000,
     increasing   $1,606,000  or  8%.  Payroll  charged  to  operations  expense
     increased  $432,000  or  4%.  Wages  for  union  employees  increased  2.5%
     effective   January  1,  2005.   Overall,   payroll  costs   (expensed  and
     capitalized)  increased 4% due to increases in the number of employees  and


                                       18


     higher wage rates. Employee and retiree medical costs increased $422,000 or
     21%. Pension costs increased  $305,000 or 17%. Outside services,  including
     legal and auditing fees  increased by $ 724,000 or 186%. At March 31, 2005,
     there were 826 employees and at March 31, 2004, there were 816 employees.

     Maintenance expenses increased by $477,000, or 15%, in the first quarter of
     2005  compared to the first  quarter of 2004 due to the repair of mains and
     pumping   equipment.   Depreciation  and  amortization   expense  increased
     $478,000, or 7%, because of 2004 capital additions.

     Federal and state income taxes  decreased  $503,000 due to the reduction of
     taxable income compared to the same quarter as last year. The effective tax
     rate was 40% in the current quarter and 40% for the prior year's quarter.

Other Income and Expense
- ------------------------
     Other income was $636,000 for the quarter  ended March 31, 2005 compared to
     $551,000  in the same  period  last year,  which is an increase of $85,000.
     Gains  (losses) from  property  sales for the quarter were minimal for both
     the current and the prior quarters.

Interest Expense
- ----------------
     Total interest expense  decreased  $75,000 or 2%. This decrease of interest
     expense was due to an increase in  capitalized  interest,  as  construction
     work in progress  amounts were higher in the first quarter of 2005 compared
     to the first quarter of 2004


REGULATORY MATTERS
Rate Case Proceedings
- ---------------------
     In January 2005,  Cal Water received  approval from the  California  Public
     Utilities  Commission  (CPUC) for step rate increases of $4.4 million on an
     annual basis, which were effective in January 2005.

     Pending  approval are Cal Water's 2004 General Rate Case (GRC)  filings for
     an  increase  of $26.5  million  in eight  districts.  Typically,  the CPUC
     authorizes  substantially less than the requested amount. At this time, the
     Company is unable to predict the timing and final amount of these filings.

     Approval  of an advice  letter  filing  increasing  rates by $822,000 on an
     annual basis to offset purchased water and pump tax expenses in Cal Water's
     Stockton district is expected in the second quarter of 2005.  Additionally,
     Cal Water has  pending  memorandum  account  filings  for 2004  offsettable
     expense to refund customers  $544,000 over 12 months.  Approval is expected
     by the CPUC by the third quarter of 2005.

     In April 2005,  the New Mexico Public  Regulation  Commission  approved New
     Mexico Water  Service  Company's  GRC for its  wastewater  operations.  The
     approval was for a rate increase of $329,000 on an annual basis. Sixty-five
     percent of the amount is effective  immediately and the full amount will be
     effective on January 1, 2006.

                                       19


     In February 2005, the Hawaii Public Utilities  Commission  issued a general
     rate order that decreased rates for Hawaii Water Service  Company's  (HWSC)
     Kaanapali water system by  approximately  $68,000  annually.  Additionally,
     HWSC was  authorized  to  establish  a tracking  mechanism  for  recovering
     certain  water  treatment  plant  costs,  approximately  $50,000  annually,
     pending the outcome of litigation seeking recovery for treatment costs from
     the  potentially  responsible  parties.  These  filings are not expected to
     materially affect the total Company financial results. Finally,  Washington
     Water Service Company anticipates filing for a GRC in 2005.

     Below is a list of rate  filings  approved  by the CPUC in 2004  that  will
     impact 2005 due to the fact that revenues are recorded  based upon customer
     billings,  which typically reflect rate changes over a 12-month period from
     the effective  date. (See Results of First Quarter  Operations  Compared to
     First  Quarter  2004  Operations - Operating  Revenue).  There were no rate
     filings  approved  during 2004 for Washington  Water Service  Company,  New
     Mexico Water Service Company, and Hawaii Water Service Company.

                  February  2004 - increase of $700,000  annually for  purchased
                  water costs

                  April 2004 - step rate increases of $500,000 annually.

                  April 2004 - increase of $3,600,000 annually for the 2002 GRCs
                  in four districts.

                  May  2004  -  refund  of  $1,500,000  for  balancing   account
                  over-collections related to offsettable expenses incurred over
                  multiple  years in the  King  City  and  Dominguez  districts.
                  Except for a minor amount refunded over 36-months,  surcredits
                  will be effective for 12-months.

                  June 2004 -  surcharge  to  recover  $400,000  in  offsettable
                  expenses for 2001 in the Salinas district.

                  July 2004 - increase of $1,100,000, annually, for the 2001 GRC
                  in the Salinas district

                  August 2004 - step rate increases of $500,000,  annually,  for
                  four districts

                  September 2004 - increase of $400,000,  annually, for the 2003
                  GRC in the South San Francisco and Bakersfield districts

                  September 2004 - increase of $500,000, annually, for purchased
                  water and pump taxes in the Los Altos district

                  October - December 2004 - surcharges to recover  $9,200,000 in
                  offsettable  expenses for 2002 and 2003 in multiple districts.
                  Surcharges  vary by district and are  effective  from 12 to 36
                  months.

                                       20


Other Regulatory Matters
- ------------------------
     Cal Water  recovered  certain  amounts being tracked in  off-balance  sheet
     expense  balancing  and  memorandum  account.  Approvals  to recover  these
     amounts were  received in 2004.  (See  "Expense  Balancing  and  Memorandum
     Accounts" section in Critical  Accounting  Policies.) The amounts remaining
     to be  recovered  from  these  approved  filings  as of March 31,  2005 and
     December 31, 2004, were $7,328,000 and $8,588,000, respectively.

     Surplus Property Sales
     ----------------------
     In  1995,   the   California   Legislature   enacted   the  Water   Utility
     Infrastructure  Improvement Act of 1995  (Infrastructure  Act) to encourage
     water  utilities  to sell surplus  properties  and reinvest in needed water
     utility  facilities.  In September  2003, the California  Public  Utilities
     Commission  (CPUC)  issued  decision  D.03-09-021  in Cal Water's  2001 GRC
     filing. In this decision, the CPUC ordered Cal Water to file an application
     setting up an  Infrastructure  Act  memorandum  account with an  up-to-date
     accounting  of all real property that was at any time in rate base and that
     Cal Water had sold  since the  effective  date of the  Infrastructure  Act.
     Additionally,  the  decision  directed  the CPUC  staff to file a  detailed
     report on its review of Cal Water's  application.  On January 11, 2005, the
     Office of Ratepayers Advocates (ORA) issued a report expressing its opinion
     that Cal Water had not proven that surplus  properties sold since 1996 were
     no longer  used and  useful.  The ORA  recommended  that Cal Water be fined
     $160,000  and that gains  from  property  sales  should  generally  benefit
     ratepayers.

     During the period under review,  Cal Water's  cumulative gains from surplus
     property sales were $19.2 million,  which  included an  inter-company  gain
     related to a  transaction  with Utility  Services and a like-kind  exchange
     with a third party. If the CPUC finds any surplus property sale or transfer
     was recorded inappropriately, Cal Water's rate base could be reduced, which
     would lower future  revenues,  net income,  and cash flows. In early April,
     the parties submitted testimony and briefs and the Administrative Law Judge
     held an  evidentiary  hearing.  The  Company  expects to receive a proposed
     decision sometime within the second or third quarter.  Management  believes
     it  has  fully  complied  with  the   Infrastructure  Act  and  that  ORA's
     conclusions  and  recommendations  are without merit.  Cal Water intends to
     vigorously oppose ORA's findings.  Accordingly, Cal Water has not accrued a
     liability in the financial  statements for ORA's  recommendations.  At this
     time, Cal Water does not know how the CPUC will rule in this matter.

LIQUIDITY
Short-term and Long-term Debt
- -----------------------------
     There were no outstanding  short-term bank borrowings at March 31, 2005 and
     December 31, 2004 on either the Company's or Cal Water's  credit  facility.
     California  Water Service Group has a $10,000,000  credit  facility,  which
     includes  Washington Water, New Mexico Water, Hawaii Water, and CWS Utility
     Services. Cal Water has a $45,000,000 credit facility. Both agreements have
     a  requirement  for  balances  to  be  below  certain   thresholds  for  30
     consecutive  days each calendar year.  The Company met this  requirement in


                                       21


     the first  quarter  of 2005 for both  agreements.  At March 31,  2005,  the
     Company was in compliance with the covenants of both facilities.

     There were no additions to long-term debt in the  three-month  period ended
     March 31, 2005 and the Company made principal  payments of $407,000  during
     the three-month period ended March 31, 2005.

     In September  2004, Cal Water received  authorization  from the CPUC on its
     financing  filing  related to  $250,000,000  of  additional  debt or equity
     available for issuance through the year 2009. No amounts have been utilized
     to date.  This amount will be utilized on an as-needed  basis.  The balance
     remaining from the previous authorization does not carry over.

Debt Credit Ratings
- -------------------
     Cal Water's debt is rated A2 by Moody's  Investors Service (Moody's) and A+
     by Standard & Poor's  (S&P).  The rating from  Moody's  was  downgraded  in
     February  2004 from A1 to A2. The  ratings  from both  Moody's and S&P were
     unchanged during the quarter and the last rating change from Moody's was in
     the first quarter of 2004, while the last change from S&P was in the fourth
     quarter of 2002.

Shelf Registration
- ------------------
     The Company has  $35,648,175  in  securities  under the shelf  registration
     filed with the SEC in 2003, which are available for future issuance.

Dividends, Book Value and Shareholders
- --------------------------------------
     The first  quarter  common stock  dividend of $0.2850 per share was paid on
     February 18, 2005, compared to a quarterly dividend in the first quarter of
     2004  of  $0.2825.  This  was the  Company's  241st  consecutive  quarterly
     dividend.  Annualized,  the 2005  dividend  rate is $1.14 per common share,
     compared  to $1.13 in 2004.  Based on the  12-month  earnings  per share at
     March 31,  2005,  the dividend  payout ratio is 82% of net income.  For the
     full year 2004,  the payout  ratio was 77% of net  income.  On a  long-term
     basis,  the Company's goal is to achieve a dividend  payout ratio of 60% of
     net income accomplished through future earnings growth.

     At its April 27,  2005  meeting,  the Board  declared  the  second  quarter
     dividend of $0.2850 per share payable on May 20, 2005, to  stockholders  of
     record  on May 9,  2005.  This  will  be the  Company's  242nd  consecutive
     quarterly dividend.

Dividend Reinvestment and Stock Purchase Plan
- ---------------------------------------------
     The Company's transfer agent has a Dividend Reinvestment and Stock Purchase
     Plan  (Plan).  Under the  Plan,  stockholders  may  reinvest  dividends  to
     purchase  additional Company common stock without commission fees. The Plan
     also  allows  existing  stockholders  and  other  interested  investors  to
     purchase  Company  common stock  through the  transfer  agent up to certain
     limits. The Company's transfer agent operates the Plan and purchases shares
     on the open market to provide shares for the Plan.

                                       22


2005 Financing Plan
- -------------------
     The  Company's   2005  financing   plan  includes   raising   approximately
     $20,000,000 to $40,000,000  of new capital.  The plan includes  issuance of
     long-term debt to meet funding needs. Currently,  the Company does not plan
     to issue additional equity in 2005, although this may change depending on a
     variety of factors.  Beyond 2005,  management intends to fund capital needs
     through a relatively balanced approach between long-term debt and equity.

Book Value and Stockholders of Record
- -------------------------------------
     Book value per common share was $15.41 at March 31, 2005 compared to $15.66
     at December 31, 2004.

     There are approximately  4,000  stockholders of record for our common stock
     at March 31, 2005.

Utility Plant Expenditures
- --------------------------
     During the three months ended March 31, 2005, capital  expenditures totaled
     $17,283,000;  $14,743,000 was from  company-funded  projects and $2,540,000
     was  from  third-party-funded  projects.  The 2005  company-funded  capital
     expenditure  budget is  $85,000,000.  The  actual  amount may vary from the
     budget  number due to timing of actual  payments  related  to current  year
     projects   and  prior  year   projects.   The  Company   does  not  control
     third-party-funded capital expenditures and therefore is unable to estimate
     the amount of such projects for 2005.

     At March 31, 2005,  construction work in progress was $24,727,000  compared
     to $13,248,000  at December 31, 2004.  Work in progress  includes  projects
     that are under construction but not yet complete and in service.


WATER SUPPLY
     Based  on  information  from  water  management   agencies  and  internally
     developed  data,  the Company  believes  that its various  sources of water
     supply are  sufficient  to meet  customer  demand for the  remainder of the
     year.  Historically,  about half of the water is purchased  from  wholesale
     suppliers  with the other  half  pumped  from  underground  wells.  A small
     portion is developed through three local surface treatment plants.

     On  April  12,  2005,  the  Company  announced  that it had  requested  its
     customers in the Salinas  district to cut down on peak hour water usage for
     a  three-month  period  due to six wells  that  were  shut off  temporarily
     because of contamination.  The Company also asked large commercial users to
     reduce  water usage during peak hours,  and to store water during  non-peak
     hours for later use. It is expected that treatment  systems for four of the
     wells  removed  from  service  will be in service by summer and normal peak
     demands can be met at that time. The Salinas district accounted for 4.4% of
     the  Company's  revenues for the first  quarter  ended March 31, 2005.  The
     shut-down of these wells is not expected to materially impact the financial
     results or cash flows of the Company.

                                       23


     To safeguard its water supply and  facilities,  the Company has  heightened
     security at its facilities and have taken added safety  precautions for the
     Company's  employees and the water it delivers to its customers.  While the
     Company does not make public comments on its security programs, it has been
     in contact  with  federal,  state,  and local law  enforcement  agencies to
     coordinate and improve water  delivery  systems  security.  The Company has
     assigned a high  priority to completing  work  necessary to comply with new
     Environmental  Protection Agency (EPA) requirements  concerning security of
     water facilities.  In 2002, federal  legislation was enacted which resulted
     in new  regulations  concerning  security  of water  facilities,  including
     submitting vulnerability assessment studies to the federal government.  The
     timing of submission of these studies was based on size of operations.  The
     Company has  submitted  the studies that are required  and  completed  this
     program in 2004.




                                       24

Item 3.

QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK
     The  Company  does  not  hold,  trade  in  or  issue  derivative  financial
     instruments  and  therefore  is not  exposed  to  risks  these  instruments
     present.  Its market risk to interest rate exposure is limited  because the
     cost of long-term  financing  and  short-term  bank  borrowings,  including
     interest  costs,  is covered in  consumer  water  rates as  approved by the
     commissions.  The Company does not have foreign operations;  therefore,  it
     does not have a foreign currency  exchange risk. The Company's  business is
     sensitive to commodity  prices and is most affected by changes in purchased
     water and purchased power costs.

     Historically, the CPUC's balancing account or offsetable expense procedures
     allowed for increases in purchased  water and  purchased  power costs to be
     passed on to consumers.  Traditionally, a significant percentage of our net
     income and cash flows comes from California regulated operations; therefore
     the CPUC's actions have a significant  impact on our business.  See Item 2,
     "Management's Discussion and Analysis of Financial Condition and Results of
     Operations  -  Critical   Accounting   Policies  --Expense   Balancing  and
     Memorandum Accounts" and "Regulatory Matters".


Item 4.

CONTROLS AND PROCEDURES
     (a) Evaluation of Disclosure Controls and Procedures

     The Company  carried out an evaluation,  under the  supervision of and with
     the  participation  of its  management,  including its principal  executive
     officer and principal financial officer, of the effectiveness of the design
     and operation of our  disclosure  controls and  procedures as of the end of
     the period  covered by this report,  pursuant to Rule  13a-15(e)  under the
     Securities  Exchange Act of 1934.  Based on their  review of the  Company's
     disclosure  controls and procedures,  the principal  executive  officer and
     principal financial officer have concluded that its disclosure controls and
     procedures are functioning effectively to provide reasonable assurance that
     the  information  required  to be  disclosed  in  periodic  SEC  filings is
     reported   within  the  time  periods   specified  by  the  SEC  rules  and
     regulations.

     (b) Changes to Internal Controls Over Financial Reporting

     There  was no change  in the  Company's  internal  control  over  financial
     reporting that occurred  during the last fiscal quarter that has materially
     affected,  or are reasonably  likely to materially  affect,  the Company's.
     internal controls over financial reporting.


                                       25

PART II       OTHER INFORMATION

Item 1.

LEGAL PROCEEDINGS

(a)           From time to time,  the Company has been  involved in a variety of
              legal proceedings.  For a complete description,  see the Company's
              annual  report on Form 10-K for the year ended  December 31, 2004.
              During the quarter  ended March 31,  2005,  there were no material
              developments  with  respect  to  previously   disclosed   existing
              procedures and no material proceeding not previously disclosed.

(b)           The  discussion  under  Part  I,  Financial  Information,  Item 2,
              "Managements  Discussion  and Analysis of Financial  Condition and
              Results of  Operations  -  Regulatory  Matters:  Surplus  Property
              Sales" is incorporated by reference.


Item 4.

SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

              The annual  meeting of  stockholders  of California  Water Service
              Group was held on April 27, 2005 at the headquarters office in San
              Jose, California.

(a)           At the annual stockholders  meeting, a Board of Directors to serve
              for the ensuing year was elected.  The  following  directors  were
              elected as nominated:

                      Douglas M. Brown                  Robert W. Foy
                      Edward D. Harris, Jr. M.D.        Richard P. Magnuson
                      Linda R. Meier                    Peter C. Nelson
                      George A. Vera                    David N. Kennedy
                      Bonnie G. Hill

(b)           Two other proposals were voted on at the meeting; the ratification
              of the selection of KPMG LLP as independent  auditors for 2005 and
              the approval of the Equity  Incentive  Plan.  Both  proposals were
              approved by the Company's stockholders.



                                       26


(1)          Tabulation of the votes for the election of directors was:

                                                    For                Abstain
                                                    ---                -------
              Douglas M. Brown                    18,358,489           517,509
              Robert W. Foy                       18,330,583           545,415
              Edward D. Harris, Jr. M.D.          17,960,481           915,517
              Bonnie G. Hill                      17,919,738           956,261
              David N. Kennedy                    17,984,029           891,969
              Richard P. Magnuson                 17,989,461           886,537
              Linda R. Meier                      17,926,278           949,721
              Peter C. Nelson                     18,321,562           554,436
              George A. Vera                      18,356,144           519,854


(2)           The stockholders  ratified the Audit Committee's selection of KPMG
              LLP  to  serve  as  independent  auditors  for  2005.  There  were
              18,584,494   votes  in  favor,   172,195   against   and   119,307
              abstentions.

(3)           The  stockholders  approved the Equity  Incentive Plan. There were
              9,248,987 in favor, 2,618,525 against, 352,064 abstentions.


Item 6.

EXHIBITS

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



                                       27


                                            SIGNATURES

         Pursuant to the requirement 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.


                         CALIFORNIA WATER SERVICE GROUP
                         ------------------------------
                                   Registrant


May 5, 2005



            By:              /s/ Richard D. Nye
                ----------------------------------------------
                                 Richard D. Nye
                     Vice President, Chief Financial Officer
                                  and Treasurer



                                       28


                                  Exhibit Index

   Exhibit                 Description
   -------                 -----------

   31.1                    Chief Executive Officer certification of financial
                           statements pursuant to Section 302 of the Sarbanes-
                           Oxley Act of 2002

   31.2                    Chief Financial Officer certification of financial
                           statements pursuant to Section 302 of the Sarbanes-
                           Oxley Act of 2002

   32                      Chief Executive Officer and Chief Financial Officer
                           Certification pursuant to 18 U.S.C. Section 1350, as
                           adopted pursuant to Section 906 of the Sarbanes-
                           Oxley Act of 2002


                                       29