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 June 30, 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
- --------------------------------------------------------------------------------
(State 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
August 1, 2005 - 18,375,496.





TABLE OF CONTENTS
                                                                            Page

PART I    Financial Information - Financial Statements....................... 3

Item 1    Condensed Consolidated Balance Sheets (unaudited)
            June 30, 2005 and December 31, 2004.............................  4

          Condensed Consolidated Statements of Income (unaudited)
            For the Three and Six Months Ended June 30, 2005 and 2004.......  5

          Condensed Consolidated Statements of Cash Flows (unaudited)
            For the Six Months Ended June 30, 2005 and 2004.................  6

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

Item 2    Management's Discussion and Analysis of Financial Condition
            and Results of Operations....................................... 14

Item 3    Quantitative and Qualitative Disclosure about Market Risk......... 29

Item 4    Controls and Procedures........................................... 29


PART II   Other Information

Item 1    Legal Proceedings................................................. 30

Item 4    Submission of Matters to a Vote of Security Holders............... 30

Item 6    Exhibits.......................................................... 30

          Signatures........................................................ 31

          Index to Exhibits................................................. 32


                                       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
(In thousands, except per share data)
Unaudited

                                                                         June 30,      December 31,
                                                                           2005            2004
                                                                       -----------     -----------
                                                                                 
ASSETS
Utility plant:
     Utility plant                                                     $ 1,177,272     $ 1,144,074
     Less accumulated depreciation and amortization                        358,184         343,769
                                                                       -----------     -----------
                                                                           819,088         800,305
                                                                       -----------     -----------
Current assets:
     Cash and cash equivalents                                              19,243          18,820
     Receivables, net of allowances for uncollectible accounts
            of $286 at June 30, 2005 and $ 287 at December 31, 2004
            Customers                                                       18,331          15,867
            Income taxes                                                       363           7,298
            Other                                                            4,629           3,147
     Unbilled revenue                                                       13,601           9,307
     Materials and supplies, at average cost                                 3,834           3,161
     Prepaid pension expense                                                   281           3,671
     Taxes and other prepaid expenses                                        5,501           9,122
                                                                       -----------     -----------
              Total current assets                                          65,783          70,393
                                                                       -----------     -----------
Regulatory assets
                                                                            55,174          53,477
Other assets                                                                19,646          18,678
                                                                       -----------     -----------
                                                                       $   959,691     $   942,853
                                                                       ===========     ===========
CAPITALIZATION AND LIABILITIES
Capitalization:
     Common stock, $.01 par value                                      $       184     $       184
     Additional paid-in capital                                            131,510         131,271
     Retained earnings                                                     154,574         156,851
     Accumulated other comprehensive loss                                     (701)           (701)
                                                                       -----------     -----------
              Total common stockholders' equity                            285,567         287,605
     Preferred stock                                                         3,475           3,475
     Long-term debt, less current maturities                               274,538         274,821
                                                                       -----------     -----------
              Total capitalization                                         563,580         565,901
                                                                       -----------     -----------
Current liabilities:
     Current maturities of long-term debt                                    1,144           1,100
     Short-term borrowings                                                    --              --
     Accounts payable                                                       30,096          19,745
     Accrued expenses and other liabilities                                 37,868          36,367
                                                                       -----------     -----------
              Total current liabilities                                     69,108          57,212

Unamortized investment tax credits                                           2,721           2,721
Deferred income taxes                                                       56,710          54,826
Regulatory and other liabilities                                            36,170          35,986
Advances for construction                                                  136,010         131,292
Contributions in aid of construction                                        95,392          94,915
Commitments and contingencies                                                 --              --
                                                                       -----------     -----------
                                                                       $   959,691     $   942,853
                                                                       ===========     ===========
<FN>
See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements
</FN>



                                       4



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


                                            For the three months ended:    For the six months ended:
                                                June 30,    June 30,           June 30,    June 30,
                                                  2005        2004              2005        2004
                                                --------    --------          --------    --------
                                                                              
Operating revenue                               $ 81,457    $ 88,845          $141,760    $149,085
                                                --------    --------          --------    --------
Operating expenses:
     Water production costs                       29,395      33,563            49,215      54,724
     Other operations                             21,804      21,887            43,747      42,224
     Maintenance                                   3,759       3,032             7,418       6,213
     Depreciation and amortization                 7,006       6,521            14,002      13,039
     Income taxes                                  5,148       6,844             5,603       7,802
     Property and other taxes                      3,092       2,915             6,057       5,609
                                                --------    --------          --------    --------
        Total operating expenses                  70,204      74,762           126,042     129,611
                                                --------    --------          --------    --------

        Net operating income                      11,253      14,083            15,718      19,474
                                                --------    --------          --------    --------
Other income and expenses:
        Non-regulated income, net                    705         573             1,343       1,123

        Gain on sale of non-utility property                  61  --                59           1
                                                --------    --------          --------    --------
        Total other income and expenses              766         573             1,402       1,124
                                                --------    --------          --------    --------
Interest expense:
     Interest expense                              4,653       4,752             9,299       9,398
     Less capitalized interest                       225         150               450         300
                                                --------    --------          --------    --------
        Total interest expense                     4,428       4,602             8,849       9,098
                                                --------    --------          --------    --------

Net income                                      $  7,591    $ 10,054          $  8,271    $ 11,500
                                                ========    ========          ========    ========

Earnings per share
     Basic                                      $   0.41    $   0.59          $   0.45    $   0.67
                                                ========    ========          ========    ========
     Diluted                                    $   0.41    $   0.59          $   0.45    $   0.67
                                                ========    ========          ========    ========
Weighted average shares outstanding
     Basic                                        18,373      16,965            18,372      16,949
                                                ========    ========          ========    ========
     Diluted                                      18,407      16,983            18,404      16,967
                                                ========    ========          ========    ========
Dividends per share of common stock             $ 0.2850    $ 0.2825          $ 0.5700    $ 0.5650
                                                ========    ========          ========    ========

<FN>
See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements
</FN>



                                       5



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



For the six months ended:                                             June 30,    June 30,
                                                                        2005        2004
                                                                     --------     --------
                                                                            
Operating activities
     Net income                                                      $  8,271     $ 11,500
                                                                     --------     --------
     Adjustments to reconcile net income to net cash
       provided by operating activities:
         Depreciation and amortization                                 14,002       13,039
         Deferred income taxes, investment tax credits
             regulatory assets and liabilities, net                       316       10,925
         Gain on sale of non-utility assets                               (59)          (1)
         Changes in operating assets and liabilities:
             Receivables                                                2,972      (13,103)
             Unbilled revenue                                          (4,294)      (4,572)
             Taxes and other prepaid expenses                           7,012       (1,308)
             Accounts payable                                          10,350        4,838
             Other current assets                                        (673)        (268)
             Other current liabilities                                  1,501        3,971
             Other changes, net                                          (608)        (915)
                                                                     --------     --------
                Net adjustments                                        30,519       12,606
                                                                     --------     --------
                Net cash provided by operating activities              38,790       24,106
                                                                     --------     --------
Investing activities:
     Utility plant expenditures:
        Company-funded                                                (28,463)     (21,399)
        Developer-funded                                               (5,572)      (8,230)
     Acquisitions                                                        (155)        (900)
     Proceeds from sale of non-utility assets                              62            6
                                                                     --------     --------
                Net cash used in investing activities                 (34,128)     (30,523)
                                                                     --------     --------
Financing activities:
     Net changes in short-term borrowings                                --         (6,454)
     Retirement of long-term debt, net                                   (557)        (316)
     Advances for construction                                          7,039        7,096
     Refunds of advances for construction                              (2,321)      (2,394)
     Contributions in aid of construction                               1,910        2,479
     Issuance of common stock                                             239       36,903
     Dividends paid                                                   (10,549)      (9,644)
                                                                     --------     --------
                Net cash (used in) provided by financing
                   activities                                          (4,239)      27,670
                                                                     --------     --------
Change in cash and cash equivalents                                       423       21,253
Cash and cash equivalents at beginning of period                       18,820        2,856
                                                                     --------     --------
Cash and cash equivalents at end of period                           $ 19,243     $ 24,109
                                                                     ========     ========
<FN>
See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements
</FN>


                                       6


                         CALIFORNIA WATER SERVICE GROUP
         Notes to Unaudited Condensed Consolidated Financial Statements
                                  June 30, 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 commission. 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 and related 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  has  an  Equity  Incentive  Plan  (the  "Plan")  approved  by
     stockholders on April 27, 2005, that allows granting of non-qualified stock
     options and other  equity  instruments.  No grants have been made under the
     Plan,  which  replaces  the former  Long-Term  Incentive  Plan under  which
     options  were  granted,  some of which are still  outstanding.  No  further
     grants will be made under the Long-Term Incentive Plan.


                                       7



     The  Company  has  adopted  the  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 or six-month periods ended June 30, 2005 or 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.

(In thousands, except per share data)

                                                           Three Months Ended    Six Months Ended
                                                                June 30,             June 30,
                                                           2005        2004      2005        2004
                                                          -------    -------    -------    -------
                                                                               
Net income, as reported                                   $ 7,591    $10,054    $ 8,271    $11,500
Less preferred dividends                                       38         38         76         76
                                                          -------    -------    -------    -------
Net income available to common stockholders                 7,553     10,016      8,195     11,424
Deduct:  Total stock-based employee compensation
     expense determined under fair value
     method for all awards, net of related tax effects         12         16         23         33
                                                          -------    -------    -------    -------
Pro forma net income                                      $ 7,541    $10,000    $ 8,172    $11,391
                                                          =======    =======    =======    =======

Earnings per share
          Basic - as reported                             $  0.41    $  0.59    $  0.45    $  0.67
          Basic - pro forma                               $  0.41    $  0.59    $  0.44    $  0.67

          Diluted - as reported                           $  0.41    $  0.59    $  0.45    $  0.67
          Diluted - pro forma                             $  0.41    $  0.59    $  0.44    $  0.67


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 12-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.


                                       8


Note 5.  Earnings Per Share Calculations

     The computations of basic and diluted earnings per share are noted below.

     Common stock options outstanding to purchase common shares were 113,250 and
     145,500 at June 30, 2005 and June 30, 2004, respectively.



(In thousands, except per share data)

                                                   Three Months Ended     Six Months Ended
                                                        June 30,              June 30,
                                                    2005        2004       2005      2004
                                                   -------    -------    -------    -------
                                                                        
Net income, as reported                            $ 7,591    $10,054    $ 8,271    $11,500
Less preferred dividends                                38         38         76         76
                                                   -------    -------    -------    -------
Net income available to common shareholders        $ 7,553    $10,016    $ 8,195    $11,424
                                                   =======    =======    =======    =======

Weighted average common shares, basic               18,373     16,965     18,372     16,949
Dilutive common stock options (treasury method)         34         18         32         18
                                                   -------    -------    -------    -------
Shares used for dilutive calculation                18,407     16,983     18,404     16,967
                                                   =======    =======    =======    =======

Earnings per share -  basic                        $  0.41    $  0.59    $  0.45    $  0.67
                                                   -------    -------    -------    -------
Earnings per share - dilutive                      $  0.41    $  0.59    $  0.45    $  0.67
                                                   -------    -------    -------    -------


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  June 30,  2005,  and
     $147,000 for the six months ended June 30, 2005. The estimated  funding for
     2005 is $6,600,000.


                                       9


     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
     postretirement benefits.



(In thousands)                                Three Months Ended June 30,                       Six Months Ended June 30,
                                      ------------------------------------------      -------------------------------------------
                                        Pension Benefit          Other Benefits         Pension Benefit         Other Benefits
                                      -------------------     -------------------     -------------------     -------------------
                                        2005        2004        2005        2004        2005        2004        2005        2004
                                      -------     -------     -------     -------     -------     -------     -------     -------
                                                                                                  
Service cost                          $ 1,194     $ 1,137     $   443     $   305     $ 2,388     $ 2,274     $   886     $   610

Interest cost                           1,499       1,364         448         342       2,998       2,728         896         684

Expected return on plan assets         (1,378)     (1,219)        (97)        (86)     (2,756)     (2,438)       (194)       (172)

Recognized net initial APBO               N/A         N/A          69          69         N/A         N/A         138         138

Amortization of prior service cost        487         424          19          19         974         848          38          38

Recognized net actuarial loss              54          34         195          84         108          68         390         168
                                      -------     -------     -------     -------     -------     -------     -------     -------
Net periodic benefit cost             $ 1,856     $ 1,740     $ 1,077     $   733     $ 3,712     $ 3,480     $ 2,154     $ 1,466
                                      =======     =======     =======     =======     =======     =======     =======     =======


     APBO - Accumulated postretirement benefit obligation

     The "other  benefits"  amount of $1,077,000 and $ 2,154,000 for the quarter
     and  year-to-date  ended June 30, 2005  include a reduction of $182,000 and
     $364,000,  respectively,  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 and  year-to-date  ended
     June 30, 2004.

     Postretirement  benefit  expenses  for  "other  benefits"  recorded  in the
     three-month  periods  ended  June  30,  2005  and 2004  were  $331,000  and
     $385,000, respectively. Postretirement benefit expense for "other benefits"
     recorded in the six-month periods ended June 30, 2005 and 2004 was $588,000
     and  771,000,  respectively.  As  of  June  30,  2005,  the  Company  had a
     regulatory asset of $10,609,000 related to postretirement  benefits,  which
     is expected to be recovered through future customer rates.


                                       10


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 Ratepayer  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 by the fourth  quarter of 2005.  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.


                                       11


     In December 2004, the FASB issued SFAS No. 123 (revised 2004), "Share-Based
     Payment,"   which   revised   SFAS   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
     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
     amends 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


     In May 2005,  the FASB issued  Statement No. 154,  "Accounting  Changes and
     Error  Corrections - a replacement of APB Opinion No. 20 and FASB Statement
     No. 3."  Statement  No.  154  replaces  APB  Opinion  No.  20,  "Accounting
     Changes,"  and FASB  Statement  No. 3,  "Reporting  Accounting  Changes  in
     Interim  Financial  Statements,"  and changes the  requirements for and the
     reporting of a change of an accounting  principle.  This Statement requires
     retrospective application to prior periods' financial statements of changes
     in accounting principle, unless it is impracticable to determine either the
     period-specific  effects  or  the  cumulative  effect  of the  change.  The
     Statement is effective for all fiscal years  beginning  after  December 15,
     2005.  The  implementation  of this  Statement  is not  expected  to have a
     material impact on the Company's financial position, results of operations,
     or cash flows.


                                       13


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.


                                       14


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 the Company is subject. The
     process 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 the 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.  The
     unbilled revenue amount is recorded as a current asset on the balance sheet
     under the  caption  "Unbilled  Revenue."  At June 30,  2005,  the  unbilled
     revenue  amount was  $13,601,000  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 $2,216,000
     at June 30, 2005 and  $2,193,000  at December 31, 2004.  This  liability is
     included in "accrued expenses and other liabilities" on the balance sheet.


                                       15


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 June 30, 2005,  was  approximately  $5,057,000.  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--Other  Regulatory  Matters  below for  cumulative  net
     balances  of  expense  balancing  and  memorandum  accounts  that have been
     authorized for recovery.

Regulated Utility Accounting
- ----------------------------

     Because the Company  operates  extensively in a regulated  business,  it is
     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,  the  Company  would be required  to  determine  if it had
     suffered an asset impairment that would require a write-down in the assets'
     valuation. There have been no such asset impairments as of June 30, 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 June 30, 2005.


                                       16


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


                                       17


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

Summary
- -------

     Second  quarter net income was  $7,591,000,  equivalent to $0.41 per common
     share on a diluted  basis,  compared to net income of  $10,054,000 or $0.59
     per share on a diluted  basis in the second  quarter of 2004.  The  primary
     driver  for  the  decrease  in  net  income  was  the  unfavorable  weather
     conditions during the current year compared to favorable weather conditions
     in the prior year's second quarter.

Operating Revenue
- -----------------

     Operating revenue decreased $7,388,000, or 8%, to $81,457,000. As disclosed
     in the  following  table,  the decrease  was due  primarily to decreases in
     usage,  partially  offset  by  increases  in rates and new  customer  usage
     Weather impact was unfavorable, as rainfall was much higher compared to the
     prior year.  Temperatures  were slightly cooler,  which also reduced usage.
     Water usage decreased 13% from the prior year, with the largest decrease of
     14% occurring in April.

     The factors that  affected the  operating  revenue  decrease for the second
     quarter of 2005 are presented in the following table:

         Rate increases (net)                                       $ 2,490,000
         Decrease in usage by existing customers                    (10,811,000)
         Usage by new customers                                         933,000
                                                                    ------------
              Net operating revenue decrease                        $(7,388,000)
                                                                    ============

     The components of the net rate increase are listed in the following table:

         2002 General Rate Case (GRC)                               $   575,000
         Purchased water offset                                         219,000
         2001 GRC catch up                                           (1,255,000)
         Step rates                                                   1,403,000
         Recovery of balancing accounts                               1,319,000
         2003 GRC                                                       109,000
         City of Hawthorne                                              120,000
                                                                    ------------
              Total increase in rates                               $ 2,490,000
                                                                    ============

         The number of customers from regulated and  non-regulated,  full system
     operations increased 1.1% compared to June 2004.

Total Operating Expenses
- ------------------------

     Total operating  expenses were  $70,204,000 for the three months ended June
     30, 2005, versus $74,762,000 for the same period in 2004, a 6% decrease.


                                       18


     Water production  expense consists of purchased water,  purchased power and
     pump  taxes.  It  represents  the  largest  component  of  total  operating
     expenses,  accounting for  approximately  42% of total operating  expenses.
     Water production expenses decreased 12% compared to last year.

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

                                             Three Months Ended June 30
                                          --------------------------------
                                              2005                2004
                                          -------------      -------------
             Well production                       46%                48%
             Purchased                             50%                48%
             Surface                                4%                 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 June 30
                                          ---------------------------
                                      2005             2004            Change
                                   ------------    ------------     ------------
             Purchased water       $22,385,000     $25,380,000      $(2,995,000)
             Purchased power         5,184,000       5,957,000         (773,000)
             Pump taxes              1,826,000       2,226,000         (400,000)
                                   ------------    ------------     ------------
                  Total            $29,395,000     $33,563,000      $(4,168,000)
                                   ============    ============     ============

     Purchased  water cost  decreased  due to lower  usage of  purchased  water,
     partially offset by higher prices from wholesaler and lower purchased water
     credits.  Included in the purchased water amounts are credits received from
     certain  wholesale  suppliers  and the sale of  unused  water  rights.  The
     amounts of the credits were $490,000 and  $1,004,000  for the quarter ended
     June 20,  2005 and  2004,  respectively.  Purchased  power  and pump  taxes
     decreased primarily due to lower usage.

     Other operations  expenses were  $21,804,000,  decreasing  $83,000 or 0.4%.
     Payroll and benefits charged to operations  expense  increased  $781,000 or
     6%. 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 higher wage rates.  Employee and
     retiree  medical costs  increased  $91,000 or 4%.  Pension costs  increased
     $149,000,  or 9%. Chemical and filter expenses decreased $199,000,  or 36%.
     Workers'  compensation expense decreased $455,000,  or 84%. Travel expenses
     decreased $100,000, or 40%. PUC fees decreased $104,000, or 10%, due to the
     lower level of revenues.  At June 30, 2005, there were 845 employees and at
     June 30, 2004, there were 826 employees.


                                       19


     Maintenance expense was up for the quarter ended June 30, 2005,  increasing
     $727,000,  or 24% due to increases  in well  expense of  $138,000,  pumping
     equipment of $160,000,  water treatment  equipment of $106,000 and mains of
     $142,000.  Depreciation and amortization expense increased $485,000,  or 7%
     because  of   additional   depreciation   expense   due  to  2004   capital
     expenditures.

     Federal and state income taxes decreased  $1,696,000 due to the decrease in
     taxable  income.  The effective  tax rate was 40% in the second  quarter of
     2005 and 41% for the prior year's  quarter.  On June 13, 2005,  the Company
     received notice from the Internal Revenue Service that it had completed its
     audit of the Company's  tax returns for the 2002 and 2003 tax years,  which
     closes these years to further review. The results of the audit did not have
     a material impact on the Company's balance sheet,  results of operations or
     cash flows and will result in a net refund to the  Company of $363,000  due
     to certain  adjustments.  The refund affected deferred income taxes and did
     not affect income tax expense.

Other Income and Expense
- ------------------------

     Other income was $766,000 for the quarter ended June 30, 2005,  compared to
     $573,000,  an  increase  of $193,000  primarily  due to interest  income on
     short-term  investments.  Included  in other  income  and  expense  for the
     quarter ended June 30, 2005, was $61,000  representing the gain on the sale
     of non-utility property.  There were no gains reported in the quarter ended
     June 30, 2004.

Interest Expense
- ----------------

     Total  interest  expense  decreased  $174,000,  or 4%.  This  was due to an
     increase  in  capitalized  interest,  which is a credit  to total  interest
     expense.  Construction  work-in-progress  amounts were higher in the second
     quarter of 2005 compared to 2004.

RESULTS OF  OPERATIONS  FOR THE SIX MONTHS  ENDED JUNE 2005  COMPARED TO THE SIX
MONTHS ENDED JUNE 2004

Summary
- -------

     Net income for the six-month  period ended June 30, 2004,  was  $8,271,000,
     equivalent  to $0.45 per common share on a diluted  basis,  compared to net
     income  of  $11,500,000  or $0.67 per  share on a  diluted  basis,  for the
     six-months  ended June 30, 2004. The primary driver for the decrease in net
     income was the  unfavorable  weather  conditions  experienced in the second
     quarter of 2005 compared to the second quarter of 2004.

Operating Revenue
- -----------------

     Operating  revenue  decreased  $7,325,000,  or  5%,  to  $141,760,000.   As
     disclosed  in the  following  table,  the  decrease was due to decreases in
     usage,   partially  offset  by  increases  in  rates.  Weather  impact  was
     unfavorable   as  rainfall   was  much  higher   compared  to  prior  year.
     Temperatures  were  slightly  cooler,  which  resulted in a 13% decrease in
     water usage below the prior year, with the largest monthly  decrease of 14%
     occurring in April.


                                       20


     The factors that affected the operating  revenue  decrease are presented in
     the following table:

         Rate increases (net)                                $  4,523,000
         Decrease in usage by existing customers              (13,625,000)
         Usage by new customers                                 1,777,000
                                                             ------------
              Net operating revenue decrease                 $ (7,325,000)
                                                             ============

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

         2002 GRC                                            $  1,502,000
         Purchased water offset                                   402,000
         2001 GRC catch up                                     (2,108,000)
         Step rates                                             2,344,000
         Recovery of balancing accounts                         1,996,000
         2003 GRC                                                 183,000
         City of Hawthorne                                        204,000
                                                             ------------
              Total increase in rates                        $  4,523,000
                                                             ============

Total Operating Expenses
- ------------------------

     Total operating  expenses were  $126,042,000  for the six-months ended June
     30, 2005, versus $129,611,000 for the same period in 2004, a 3% decrease.

     Water production  expense consists of purchased water,  purchased power and
     pump  taxes.  It  represents  the  largest  component  of  total  operating
     expenses,  accounting for  approximately  39% of total operating  expenses.
     Water production expenses decreased 10% compared to last year.

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

                                           Six Months Ended June 30
                                           ------------------------
                                                2005         2004
                                             -------      -------
             Well production                     45%          46%
             Purchased                           51%          50%
             Surface                              4%           4%
                                             -------      -------
             Total                              100%         100%
                                             =======      =======

     Washington  Water,  New Mexico  Water and Hawaii  Water obtain all of their
     water supply from wells.


                                       21


     The components of water production costs are shown in the table below:


                                            Six  Months Ended June 30
                                            --------------------------
                                       2005             2004         Change
                                   ------------    ------------   ------------
             Purchased water       $ 38,129,000    $ 41,741,000   $ (3,612,000)
             Purchased power          8,120,000       9,552,000     (1,432,000)
             Pump taxes               2,966,000       3,431,000       (465,000)
                                   ------------    ------------   ------------
                  Total            $ 49,215,000    $ 54,724,000   $ (5,509,000)
                                   ============    ============   ============

     Purchased  water cost  decreased  due to lower usage,  partially  offset by
     higher prices from wholesaler and lower  purchased water credits.  Included
     in purchased water are credits  received from certain  wholesale  suppliers
     and the sale of unused  water  rights.  The  amounts  of the  credits  were
     $768,000 and $2,576,000 for 2005 and 2004,  respectively.  Purchased  power
     and pump taxes also decreased due to lower production.

     Other operations expenses were $43,747,000,  increasing $1,523,000,  or 4%.
     Payroll and benefits charged to operations expense increased $1,766,000, or
     6%. 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 higher wage rates.  Employee and
     retiree medical costs increased $513,000,  or 12%. Outside services,  which
     includes legal, auditor and consultants fees,  increased $713,000,  or 80%.
     Workers'  compensation  expenses  decreased  $514,000,  or  52%.  Liability
     insurance decreased $229,000, or 23%. PUC fees decreased $98,000, or 5% due
     to the lower level of revenues.  At June 30, 2005, there were 845 employees
     and at June 30, 2004, there were 826 employees.

     Maintenance  expense  was  up for  the  six-months  ended  June  30,  2005,
     increasing  $1,205,000,  or  19%,  due to  increases  in  well  expense  of
     $159,000,  pumping  equipment of  $241,000,  water  treatment  equipment of
     $143,000 and mains and meters of $478,000.  Depreciation  and  amortization
     expense increased $963,000, or 7%, because of 2004 capital expenditures.

     Federal and state income taxes  decreased  $2,199,000  due to the change in
     taxable income. The effective tax rate was 40% in 2005 and 2004.

Other Income and Expense
- ------------------------

     Other  income  was  $1,402,000  for the  six-months  ended  June 30,  2005,
     compared  to  $1,124,000  for the first six months of 2004,  an increase of
     $278,000  that  is  partially  due  to  interest   income  from  short-term
     investments.

Interest Expense
- ----------------

     Total interest  expense  decreased  $249,000,  or 3%, due to an increase in
     capitalized  interest,  which  is  a  credit  to  total  interest  expense.
     Construction  work-in-progress  amounts were higher in the first six months
     of 2005 compared to the first six months of 2004.


                                       22


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.

     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  claims are not  expected to
     materially affect the total Company financial results.

     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 was effective in April 2005, and the full amount will
     be effective on January 1, 2006.

     In May 2005, the Company received authorization from the CPUC to recover in
     rates $822,000 on an annual basis to offset higher purchased water and pump
     tax costs in its Stockton district.

     In July 2005, the Company received  authorization  from the CPUC to recover
     in rates  $614,000 on an annual basis to offset higher  purchased  water in
     its Westlake district.

     In July 2005, the Company received a decision on its 2004 General Rate Case
     (GRC)  filings  that  authorizes  rate  increases of $7.6 million to annual
     revenues.  This  GRC  covers  approximately  50%  of the  customers  in the
     Company's California operations. The rates became effective in July 2005.

     Cal Water has  pending  memorandum  account  filings  for 2004  offsettable
     expense  to  refund to  customers  $532,000  over 12  months.  Approval  is
     expected by the CPUC by end of the third quarter of 2005.


                                       23



     Below is a list of rate filings  approved by the CPUC in 2004 that impacted
     2005 revenues due to recording revenues based upon customer billings, which
     typically  reflect rate changes over a 12-month  period from the  effective
     date. (See previous items on 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 effective over 12 - months.

         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 higher purchased
         water and pump taxes in the Los Altos district

         October  to  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.

Other Regulatory Matters
- ------------------------

     Cal Water  recovered  certain  amounts being tracked in  off-balance  sheet
     expense  balancing  and  memorandum  accounts.  Approvals to recover  these
     amounts were  received in 2004.  (See  "Expense  Balancing  and  Memorandum
     Accounts"  section  in  the  Critical  Accounting  Policies.)  The  amounts
     remaining to be recovered from these approved  filings as of June 30, 2005,
     and December 31, 2004, were $5,601,000 and $8,588,000,  respectively. These
     amounts exclude pending amounts and amounts not yet filed for recovery.


                                       24


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 Ratepayer  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  within the fourth  quarter of 2005.  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 June 30, 2005 or
     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 has met this  requirement
     in 2005  for  both  agreements.  At  June  30,  2005,  the  Company  was in
     compliance with the covenants of both facilities.

     There was an additional  $372,000  increase to long-term debt primarily due
     to an assumption of debt related to a Washington  Water  acquisition in the
     six-month  period ended June 30, 2005. The Company made principal  payments
     of $611,000 to long-term  debt during the  six-month  period ended June 30,
     2005.


                                       25


     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 did 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), both unchanged from the previous  quarter.  The
     rating from Moody's was last changed in February 2004,  when the rating was
     changed  from A1 to A2. The rating from S&P was last  changed in the fourth
     quarter of 2002, when the rating was changed from AA- to A+.

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
- ---------

     The second  quarter  common stock dividend of $0.2850 per share was paid on
     May 20,  2005,  compared to a quarterly  dividend in the second  quarter of
     2004  of  $0.2825.  This  was the  Company's  242nd  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 June
     30, 2005, the dividend payout ratio is 92% 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 July 27,  2005  meeting,  the Board  declared  the  Company's  243rd
     consecutive  dividend in the amount of $0.2850 per share, payable on August
     19, 2005, to stockholders of record on August 8, 2005.

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.


                                       26


2005 Financing Plan
- -------------------

     The  Company's   2005  financing   plan  includes   raising   approximately
     $20,000,000 of new capital in 2005. The plan includes issuance of long-term
     debt  primarily to meet funding needs for capital  expenditures.  Depending
     upon the level of capital expenditures,  this planned issuance of long-term
     debt may not occur in 2005 and  would  then be  expected  to occur in 2006.
     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 $15.54 at June 30, 2005, compared to $15.66
     at December 31, 2004.

     There are  approximately  4,000  stockholders  of record for the  Company's
     common stock as of June 30, 2005.

Utility Plant Expenditures
- --------------------------

     During the six months ended June 30,  2005,  capital  expenditures  totaled
     $34,035,000;  $28,463,000 was from  Company-funded  projects and $5,572,000
     was from  third  party-funded  projects.  The 2005  Company-funded  capital
     expenditure budget is $85,000,000,  but 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  estimated  cash  payments for the
     full-year of 2005 for Company-funded  capital  expenditures is $70 million.
     The  Company  does not control  third  party-funded  capital  expenditures;
     therefore, it is unable to estimate the amount of such projects for 2005.

     At June 30, 2005, construction work-in-progress was $31,769,000 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.

Sarbanes-Oxley Act, Section 404
- -------------------------------

     To comply with the  Sarbanes-Oxley  Act, Section 404 on internal  controls,
     external costs of $0.9 million were incurred related to 2004. For 2005, the
     Company estimates incurring $0.5 - $0.6 million in external costs.


                                       27


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. As of July 31, 2005, one of the shut-off wells is back
     on line with two more  scheduled  to be up by the  middle or end of August.
     The Company,  however, will continue to ask its customers to cut back usage
     during  peak  hours  until  the  end of  September.  The  Salinas  district
     accounted  for 4.5% of the  Company's  revenues for the second  quarter and
     year-to-date ended June 30, 2005. The continued  shut-down of five of these
     wells is not expected to materially  impact the  financial  results or cash
     flows of the Company.


                                       28


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,  are  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 the Company's 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 SEC rules and regulations.

     (b) Changes to Internal Control 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 is  reasonably  likely to  materially  affect,  the Company's
     internal control over financial reporting.


                                       29


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 June 30, 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,
         "Management's  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

Previously  reported  in the  Company's  quarterly  report  on Form 10-Q for the
quarter ended March 31, 2005.

Item 6.

EXHIBITS

     Exhibits required to be filed by 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.


                                       30



                                   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

August 5, 2005


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


                                       31


                                  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


                                       32