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 September 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
  of incorporation or organization)                  identification No.)


  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 by check mark whether the  registrant is a shell company (as defined by
Rule 12b-2 of the Exchange Act).
Yes ___    No  _X_

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
November 1, 2005 - 18,389,996.





                                TABLE OF CONTENTS
                                                                                     Page

                                                                                   
 PART I   Financial Information....................................................    3

  Item 1    Financial Statements

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

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

            Condensed Consolidated Statements of Cash Flows (unaudited)
              For the Nine Months Ended September 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............................................   16

 Item 3     Quantitative and Qualitative Disclosure about Market Risk..............   33

 Item 4     Controls and Procedures................................................   33


 PART II  Other Information

 Item 1     Legal Proceedings......................................................   34

 Item 6     Exhibits...............................................................   34

            Signatures.............................................................   35

            Index to Exhibits......................................................   36



                                       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                                                                  September 30,  December 31,
                                                                               2005           2004
                                                                            -----------    -----------
                                                                                     
ASSETS
Utility plant:
           Utility plant                                                    $ 1,199,681    $ 1,144,074
           Less accumulated depreciation and amortization                       366,019        343,769
                                                                            -----------    -----------
                                                                                833,662        800,305
                                                                            -----------    -----------
Current assets:

           Cash and cash equivalents                                             23,791         18,820
           Receivables, net of allowances for uncollectible accounts
              of $416 at September 30, 2005 and $287 at December 31, 2004
                       Customers                                                 22,779         15,867
                       Income taxes                                                --            7,298
                       Other                                                      3,865          3,147
           Unbilled revenue                                                      14,271          9,307
           Materials and supplies, at average cost                                4,017          3,161
           Prepaid pension expense                                                2,599          3,671
           Taxes and other prepaid expenses                                       4,055          9,122
                                                                            -----------    -----------
                                         Total current assets                    75,377         70,393
                                                                            -----------    -----------
Regulatory assets                                                                55,449         53,477
Other assets                                                                     20,329         18,678
                                                                            -----------    -----------
                                                                            $   984,817    $   942,853
                                                                            ===========    ===========

CAPITALIZATION AND LIABILITIES
Capitalization:
           Common stock, $.01 par value                                     $       184    $       184
           Additional paid-in capital                                           131,991        131,271
           Retained earnings                                                    162,410        156,851
           Accumulated other comprehensive loss                                    (701)          (701)
                                                                            -----------    -----------
                    Total common stockholders' equity                           293,884        287,605
           Preferred stock                                                        3,475          3,475
           Long-term debt, less current maturities                              274,361        274,821
                                                                            -----------    -----------
                    Total capitalization                                        571,720        565,901
                                                                            -----------    -----------
Current liabilities:
           Current maturities of long-term debt                                   1,144          1,100
           Accounts payable                                                      29,541         19,745
           Accrued expenses and other liabilities                                51,440         36,367
                                                                            -----------    -----------
                    Total current liabilities                                    82,125         57,212

Unamortized investment tax credits                                                2,721          2,721
Deferred income taxes                                                            56,741         54,826
Regulatory and other liabilities                                                 36,328         35,986
Advances for construction                                                       139,298        131,292
Contributions in aid of construction                                             95,884         94,915
Commitments and contingencies                                                      --             --
                                                                            -----------    -----------
                                                                            $   984,817    $   942,853
                                                                            ===========    ===========


See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements


                                       4


CALIFORNIA WATER SERVICE GROUP
CONDENSED CONSOLIDATED STATEMENTS OF INCOME



(In thousands, except per share data)
Unaudited
                                                 For the three months ended:   For the nine months ended:
                                                 ---------------------------   --------------------------
                                                 September 30,  September 30,  September 30,  September 30,
                                                     2005           2004           2005           2004
                                                   --------       --------       --------       --------
                                                                                    
Operating revenue                                  $101,128       $ 97,104       $242,888       $246,189
                                                   --------       --------       --------       --------
Operating expenses:
     Water production costs                          39,205         40,052         88,420         94,776
     Other operations                                22,307         22,404         66,054         64,628
     Maintenance                                      3,877          3,640         11,295          9,853
     Depreciation and amortization                    7,287          6,518         21,289         19,557
     Income taxes                                     8,968          7,050         14,571         14,852
     Property and other taxes                         3,381          2,942          9,438          8,551
                                                   --------       --------       --------       --------
        Total operating expenses                     85,025         82,606        211,067        212,217
                                                   --------       --------       --------       --------
        Net operating income                         16,103         14,498         31,821         33,972
                                                   --------       --------       --------       --------
Other income and expenses:
        Non-regulated income, net                       778            650          2,121          1,773

        Gain on sale of non-utility property            669              6            728              7
                                                   --------       --------       --------       --------
        Total other income and expenses               1,447            656          2,849          1,780
                                                   --------       --------       --------       --------

Interest expense:
     Interest expense                                 4,660          4,615         13,959         14,013
     Less capitalized interest                          225            250            675            550
                                                   --------       --------       --------       --------
        Total interest expense                        4,435          4,365         13,284         13,463
                                                   --------       --------       --------       --------

Net income                                         $ 13,115       $ 10,789       $ 21,386       $ 22,289
                                                   ========       ========       ========       ========

Earnings per share


     Basic                                         $   0.71       $   0.59       $   1.16       $   1.27
                                                   ========       ========       ========       ========
     Diluted                                       $   0.71       $   0.59       $   1.16       $   1.27
                                                   ========       ========       ========       ========
Weighted average shares outstanding
     Basic                                           18,384         18,345         18,376         17,418
                                                   ========       ========       ========       ========
     Diluted                                         18,422         18,362         18,412         17,433
                                                   ========       ========       ========       ========
Dividends per share of common stock                $ 0.2850       $ 0.2825         0.8550       $ 0.8475
                                                   ========       ========       ========       ========


See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements


                                       5


CALIFORNIA WATER SERVICE GROUP
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS




(In thousands)
Unaudited
For the nine months ended:                                   September 30,  September 30,
                                                                 2005          2004
                                                               --------      --------
                                                                         
Operating activities
      Net income                                               $ 21,386      $ 22,289
                                                               --------      --------
      Adjustments to reconcile net income to net cash
        provided by operating activities:
          Depreciation and amortization                          21,289        19,557
          Deferred income taxes, investment tax credits,
              regulatory assets and liabilities, net                204        12,153
          Gain on sale of non-utility assets                       (728)           (7)
          Changes in operating assets and liabilities:
              Receivables                                          (338)       (5,233)
              Unbilled revenue                                   (4,964)       (4,370)
              Taxes and other prepaid expenses                    6,140           168
              Accounts payable                                    9,795         2,993
              Other current assets                                 (857)         (319)
              Other current liabilities                          15,072         4,938
              Other changes, net                                   (347)         (836)
                                                               --------      --------
                 Net adjustments                                 45,266        29,044
                                                               --------      --------
                 Net cash provided by operating activities       66,652        51,333
                                                               --------      --------
Investing activities:
      Utility plant expenditures:
         Company-funded                                         (47,560)      (35,969)
         Developer-funded                                        (9,726)      (13,107)
      Acquisitions                                                 (467)         (900)
      Proceeds from sale of non-utility assets                      743            13
                                                               --------      --------
                 Net cash used in investing activities          (57,010)      (49,963)
                                                               --------      --------

Financing activities:
      Net changes in short-term borrowings                         --          (6,454)
      Retirement of long-term debt, net                            (734)         (378)
      Advances for construction                                  11,612        10,660
      Refunds of advances for construction                       (3,606)       (3,589)
      Contributions in aid of construction                        3,164         4,809
      Issuance of common stock                                      720        36,913
      Dividends paid                                            (15,827)      (14,865)
                                                               --------      --------
                 Net cash (used in) provided by financing
                    activities                                   (4,671)       27,096
                                                               --------      --------

Change in cash and cash equivalents                               4,971        28,466
Cash and cash equivalents at beginning of period                 18,820         2,856
                                                               --------      --------
Cash and cash equivalents at end of period                     $ 23,791      $ 31,322
                                                               ========      ========



See Accompanying Notes to Unaudited Condensed Consolidated Financial Statements


                                       6


                         CALIFORNIA WATER SERVICE GROUP
         Notes to Unaudited Condensed Consolidated Financial Statements
                               September 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 nine-month  periods ended September 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    Nine Months Ended
                                                          ------------------    -----------------
                                                              September 30,       September 30,
                                                            2005       2004      2005        2004
                                                          -------    -------    -------    -------
                                                                               
Net income, as reported                                   $13,115    $10,789    $21,386    $22,289
Less preferred dividends                                       38         38        115        115
                                                          -------    -------    -------    -------
Net income available to common stockholders                13,077     10,751     21,271     22,174
Deduct:  Total stock-based employee compensation
     expense determined under fair value

     method for all awards, net of related tax effects         12         16         36         49
                                                          -------    -------    -------    -------
Pro forma net income                                      $13,065    $10,735    $21,235    $22,125
                                                          =======    =======    =======    =======

Earnings per share
          Basic - as reported                             $  0.71    $  0.59    $  1.16    $  1.27
          Basic - pro forma                               $  0.71    $  0.59    $  1.16    $  1.27

          Diluted - as reported                           $  0.71    $  0.59    $  1.16    $  1.27
          Diluted - pro forma                             $  0.71    $  0.59    $  1.16    $  1.27


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 98,750 and
     143,250 at September  30, 2005 and September  30, 2004,  respectively.  All
     options are dilutive and the dilutive effect is shown in the table below.



(In thousands, except per share data)
                                                      Three Months Ended         Nine Months Ended
                                                      ------------------         -----------------
                                                         September 30,             September 30,
                                                       2005         2004         2005        2004
                                                     -------      -------      -------      -------
                                                                                
Net income, as reported                              $13,115      $10,789      $21,386      $22,289
Less preferred dividends                                  38           38          115          115
                                                     -------      -------      -------      -------
Net income available to common shareholders          $13,077      $10,751      $21,271      $22,174
                                                     =======      =======      =======      =======

Weighted average common shares, basic                 18,384       18,345       18,376       17,418

Dilutive common stock options (treasury method)           38           15           36           15
                                                     -------      -------      -------      -------
Shares used for dilutive calculation                  18,422       18,360       18,412       17,433
                                                     =======      =======      =======      =======

Earnings per share -  basic                          $  0.71      $  0.59      $  1.16      $  1.27
                                                     -------      -------      -------      -------
Earnings per share - dilutive                        $  0.71      $  0.59      $  1.16      $  1.27
                                                     -------      -------      -------      -------


Note 6.  Income Taxes

     In October  2004,  the American  Jobs  Creation Act of 2004 (the "Act") was
     signed  into law and  provides  a new  federal  income tax  deduction  from
     qualified U.S.  production  activities,  which is being phased in from 2005
     through  2010.  Under  the Act,  qualified  production  activities  include
     production of potable water, but excludes the transmission and distribution
     of the potable water. In December 2004, the FASB issued FASB Staff Position
     No.  109-1 and proposed  that the  deduction  should be accounted  for as a
     "special  deduction" in accordance  with SFAS No. 109. As such, the special
     deduction had no effect on deferred tax assets and liabilities  existing at
     the enactment date.  Rather,  the impact of the deduction is being reported
     in the year in which the  deduction is claimed on the Company's tax return.
     During the third quarter of fiscal 2005, the Company  completed its initial
     evaluation  of the  provisions of the Act and included an estimate for 2005
     of the deduction in the provision for income taxes. The impact was to lower
     the tax provision  for the three and nine months ending  September 30, 2005
     by $131,000.

Note 7.  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.


                                       9


     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 $4,274,000 and $4,421,000 for the three and nine months ended
     September  30,  2005,  respectively.  The  estimated  funding  for  2005 is
     $6,600,000.


                                       10




     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 September 30,                Nine Months Ended September 30,
                                        -------------------------------------------     -------------------------------------------
                                          Pension Benefit          Other Benefits         Pension Benefit          Other Benefits
                                        -------------------     -------------------     -------------------     -------------------
                                          2005        2004        2005        2004        2005        2004       2005        2004
                                        -------     -------     -------     -------     -------     -------     -------     -------
                                                                                                    
Service cost                            $   863     $ 1,182     $   234     $   380     $ 3,251     $ 3,456     $ 1,120     $   990

Interest cost                             1,135       1,482         335         382       4,133       4,210       1,231       1,066

Expected return on plan assets           (1,207)     (1,208)       (120)        (83)     (3,963)     (3,646)       (314)       (255)

Recognized net initial APBO*                N/A         N/A          69          69         N/A         N/A         207         207

Amortization of prior service cost          523         420          17          18       1,497       1,268          55          56

Recognized net actuarial loss                38         174          58         130         146         242         448         298
                                        -------     -------     -------     -------     -------     -------     -------     -------
Net periodic benefit cost               $ 1,352     $ 2,050     $   593     $   896     $ 5,064     $ 5,530     $ 2,747     $ 2,362
                                        =======     =======     =======     =======     =======     =======     =======     =======


     *APBO - Accumulated postretirement benefit obligation

     The "other benefits" amount of $593,000 and $ 2,747,000 for the quarter and
     year-to-date  ended  September 30, 2005 include a reduction of $581,000 and
     $945,000,  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.  For the  quarter  and  year-to-date
     ended  September  30,  2004  the net  periodic  benefit  cost  reflected  a
     reduction of $604,000.

     Postretirement  benefit  expenses  for  "other  benefits"  recorded  in the
     three-month  periods  ended  September  30, 2005 and 2004 were $312,000 and
     $251,000, respectively. Postretirement benefit expense for "other benefits"
     recorded in the  nine-month  periods ended  September 30, 2005 and 2004 was
     $936,000  and  $1,034,000,  respectively.  As of September  30,  2005,  the
     Company had a regulatory  asset of  $10,830,000  related to  postretirement
     benefits, which is expected to be recovered through future customer rates.

     During the third quarter of 2005 and 2004,  the Company  received a revised
     estimate of its annual expense for pension and postretirement benefits from
     its actuaries.  The Company has adjusted its monthly provision  accordingly
     to reflect  this  change in  estimate.  In 2005,  an expense  reduction  of
     $563,000 was recognized for the nine month period.  In 2004, the adjustment
     resulted in additional expense of $393,000 for the nine month period.


                                       11



Note 8. 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.  The  decision  also  ordered  Cal  Water  to  file an
application  for approval to replace the operations and customer  centers in its
Chico District and treatment of the gain on sale proceeds.

Decision  D.03-09-021  also 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 necessary
and useful to provide utility  service.  ORA also  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 CWS 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. Management believes it has
fully  complied  with the  Infrastructure  Act and that  ORA's  conclusions  and
recommendations  are  without  merit.  Accordingly,  Cal Water has not accrued a
liability in the financial statements for ORA's recommendations.

On October 27, 2005,  the CPUC extended the statutory  period for the proceeding
to January 3, 2006.  On November 2, 2005,  Administrative  Law Judge  issued his
Proposed Decision (PD). The PD finds that Cal Water  appropriately  reclassified
all  properties as  non-utility  property  prior to being sold. The criteria Cal
Water used to reclassify its properties  were reasonable and consistent with the
requirements of the CPUC. Since the properties were properly reclassified,  CPUC
approval  was not  required  prior  to the  sale and no  penalty  is  warranted.
Furthermore,  the PD finds  that Cal Water  should be allowed to include in rate
base the full value of the new Chico  customer  center.  This would result in an
increase revenue requirement of approximately $171,000.

However,  the PD does not approve the amount of sales  proceed (or gains)  which
qualifies for reinvest  under the  Infrastructure  Act. The PD defers the issues
regarding  treatment  of sale  proceeds and  allocation  of gains on sale to its
R.04-09-003 proceeding,  where the CPUC intents to set guidelines and a specific
rule on allocation of the gain on sale between shareholders and ratepayers.  Cal
Water has no knowledge when this proceeding will be concluded.


                                       12


Note 9. Commitments

     On September 21, 2005, Cal Water entered into an agreement with Kern County
     Water Agency to obtain treated water for the Company's operations. The term
     of the  agreement  is to  January 1, 2035,  or until the  repayment  of the
     Agency's  bonds  (described  below) occurs.  This agreement  supersedes the
     prior agreement with Kern County Water Agency,  as amended,  dated June 13,
     1974.

     Under the terms of the agreement, Cal Water is obligated to purchase 20,500
     acre feet of treated  water per year,  which is an increase from the 11,500
     acre feet in the prior  agreement.  The  Company  is  obligated  to pay the
     Capital  Facilities  Charge and the  Treated  Water  Charge  regardless  of
     whether it can use the water in its  operation  and is obligated  for these
     charges even if the Agency cannot produce an adequate  amount to supply the
     20,500 acre feet in the year.

     Three other  parties are also  obligated to purchase a total of 32,500 acre
     feet per year  under  separate  agreements  with the  Agency.  These  other
     participating  entities are North of the River  Municipal  Water  District,
     East  Niles  Community  Services  District,  and the  City of  Bakersfield.
     Further, the Agency has the right to proportionally reduce the water supply
     provided to all of the participants if it cannot produce adequate supplies.
     The  participation  of all parties in the  transaction for expansion of the
     Agency's  facilities,  including the Water Purification Plant,  purchase of
     the water and payment of interest  and  principal on the bonds being issued
     by the Agency to finance the  transaction is required as a condition to the
     obligation  of the  Agency  to  proceed  with  expansion  of  the  Agency's
     facilities.  If any of the other parties does not use its allocation,  that
     party is obligated to pay its contracted  amount, but may make arrangements
     for the other parties to purchase some or all of its allocation.

     The Agency is  planning to issue bonds to fund the project and will use the
     payments of the Capital  Facilities  Charges by  California  Water  Service
     Company and the other contracted  parties to meet the Agency's  obligations
     to pay  interest and repay  principal  on the bonds.  If any of the parties
     were to default on making payments of the Capital Facilities  Charge,  then
     the other parties are obligated to pay for the defaulting  party's share on
     a  pro-rata  basis.  If  there  is a  payment  default  by a party  and the
     remaining  parties  have to make  payments,  they  also are  entitled  to a
     pro-rata share of the defaulting party's water allocation.

     The  Company  expects  to use all its  contracted  amount  of  water in its
     operations  every year.  In  addition,  if the Company  were to pay for and
     receive   additional   amounts  of  water  due  to  a  default  of  another
     participating  party,  the Company  believes  it could use this  additional
     water in its operations  without  incurring  substantial  incremental  cost
     increases.  If additional  treated water is available,  all parties have an
     option to purchase this additional  treated water,  subject to the Agency's
     right to allocate the water among the parties.

     The  total  obligation  of  all  participants,   excluding  Cal  Water,  is
     approximately $108,000,000 to the agency. Based on the credit worthiness of
     the other participants which are government entities,  it is believed to be
     highly  unlikely  that Cal Water  would be  required  to  assume  any other
     participants'  obligations under the contract due to their default.  In the
     event of default by a Participant,  Cal Water would receive  entitlement to
     the additional water for assuming any obligation.


                                       13


     Once the project is  complete,  the Company is  obligated  to pay a Capital
     Facilities Charge and a Treated Water Charge that together total $4,739,000
     annually,  which  equates  to  $231  per  acre  foot.  Annual  payments  of
     $1,951,000  for the  Capital  Facilities  Charge will begin when the Agency
     issues  bonds to fund the  project.  Some of the  Treated  Water  Charge of
     $2,788,000 is expected to begin July 1, 2007, when a portion of the planned
     capacity is expected to be available. The expanded water treatment plant is
     expected to be at full capacity by July 1, 2008, and at that time, the full
     annual payments of $4,739,000  would be made and continue  through the term
     of the agreement.  Once treated water is being delivered,  the Company will
     also be obligated for its portion of the operating  costs;  that portion is
     currently  estimated to be $69 per acre foot.  The actual  amount will vary
     due to variations  from  estimate,  inflation and other changes in the cost
     structure.  The Company's  overall  estimated cost of $300 per acre foot is
     less than the estimated cost of procuring  untreated  water (assuming water
     rights could be obtained) and then providing treatment.

Note 10.  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   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


                                       14



     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.

     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.


                                       15


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.


                                       16


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 September 30, 2005, the unbilled
     revenue  amount was  $14,271,000  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 $2,191,000
     and $2,193,000 at December 31, 2004. This liability is included in "accrued
     expenses and other liabilities" on the balance sheet.


                                       17


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  recoverable  amount in the expense  balancing  accounts and
     memorandum accounts as of September 30, 2005, was approximately $4,000,000.
     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 that are not  specifically  recoverable and write off of
     liabilities that are not realizable, 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 September 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 September 30,
     2005.


                                       18


     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
     taxation.

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.


                                       19


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

Summary
- -------

     Third  quarter net income was  $13,115,000,  equivalent to $0.71 per common
     share on a diluted  basis,  compared to net income of  $10,789,000 or $0.59
     per share on a diluted  basis in the third  quarter  of 2004.  The  primary
     driver for the  increase  in net income was  increased  revenues  from rate
     increases and new customers which were partially offset by higher operating
     expenses. Other income increased due to sale of non-utility properties this
     year verses last year.

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

     Operating  revenue  increased  $4,024,000,  or  4%,  to  $101,128,000.   As
     disclosed in the  following  table,  the increase was due primarily to rate
     increases  and new  customers,  partially  offset  by  decreases  in usage.
     Revenues  from water usage  decreased  approximately  2% for the quarter as
     cooler temperatures continued in some of our service areas.

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

      Rate increases (net)                                   $   4,395,000
      Decrease in usage by existing customers                   (1,559,000)
      Usage by new customers                                     1,188,000
                                                             --------------
           Net operating revenue increase                    $   4,024,000
                                                             =============

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

      Purchased Water Offset                                      $529,000
      Balance Accounts 2003                                       (532,000)
      Balance Accounts 2004                                      2,054,000
      Balance Accounts 2005                                         76,000
      General Rate Case (GRC)
      2001 Catch-up                                            (1,362,000)
      GRC 2002                                                     280,000
      GRC 2003                                                     115,000
      GRC 2004                                                   1,658,000
      Step rate 2005                                             1,466,000
      Hawthorne                                                     76,000
      New Mexico                                                    56,000
      Hawaii                                                       (21,000)
                                                             --------------
         Total                                               $   4,395,000
                                                             =============

     The number of  customers  from  regulated  and  non-regulated,  full system
operations increased 1.3% compared to September 2004.


                                       20


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

     Total  operating  expenses  were  $85,025,000  for the three  months  ended
     September 30, 2005, versus  $82,606,000 for the same period in 2004, a 2.9%
     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  46.1% of total operating expenses.
     Water production expenses decreased 2% 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 September 30
                                      --------------------------------
                                          2005               2004
                                          ----               ----
             Well production                 50.8%              49.9%
             Purchased                       45.9%              46.5%
             Surface                          3.3%               3.6%
                                      -------------      -------------
             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 September 30
                                    -------------------------------
                                2005                 2004            Change
                                ----                 ----            ------
       Purchased water       $   28,559,000    $   28,838,000   $     (279,000)
       Purchased power            7,649,000         8,460,000         (811,000)
       Pump taxes                 2,997,000         2,754,000          243,000
                             --------------    --------------   --------------
            Total            $   39,205,000    $   40,052,000   $     (847,000)
                             ==============    ==============   ==============

     Purchased  water cost  decreased  due to lower  usage of  purchased  water,
     partially offset by higher prices from water  wholesalers.  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  $324,000 and $366,000 for the quarter  ended  September  30, 2005 and
     2004, respectively.  Purchased power and pump taxes decreased primarily due
     to lower usage and lower prices.

     Other operations  expenses were  $22,307,000,  increasing  $97,000 or 0.5%.
     Payroll and benefits charged to operations  expense  increased  $607,000 or
     4.3%. Wages for union employees increased 2.5%,  effective January 1, 2005.
     Overall  payroll costs  (expensed and  capitalized)  increased  4.4% due to
     increases  in the number of employees  and higher wage rates.  Employee and
     retiree medical costs increased  $72,000 or 23.8%. The above increases were
     offset by lower administration and general expenses which were $12,201,000,
     decreasing $171,000 or 1.4%. Pension costs decreased $561,000, or 33.5% due
     to  year-to-date  true-up of the annual  pension cost estimate  based on an
     actuarial   calculation  report  received  during  the  quarter.   Workers'
     compensation  expense decreased  $308,000,  or 40.8% due to a decrease from
     the prior year claims experience.  Regulatory  Commission expense decreased
     $120,000 or 79.0%.  At September 30, 2005,  there were 846 employees and at
     September 30, 2004, there were 830 employees.


                                       21



     Maintenance  expense  was up for the  quarter  ended  September  30,  2005,
     increasing  $237,000,  or 6.5% due to increases in main repairs of $160,000
     and reservoirs and tank repairs of $46,000,  which were partially offset by
     lower well expense of $90,000.

     Depreciation and amortization expense increased $769,000, or 12% because of
     additional depreciation expense due to 2004 capital expenditures and due to
     increased   depreciation  rates  authorized  by  the  Commission  in  eight
     districts as part of the 2004 GRC decision.

     Federal and state income taxes increased  $1,918,000 due to the increase in
     taxable  income.  The  effective tax rate was 40.6% in the third quarter of
     2005 and 39.5% for the prior year's third quarter.

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

     Other  income was  $1,447,000  for the quarter  ended  September  30, 2005,
     compared to $656,000  for the prior year's  third  quarter,  an increase of
     $791,000,  primarily  due to  gain  on  sale  of  non-utility  property  of
     $669,000.  A gain of $6,000 was  recognized in the quarter ended  September
     30, 2004.  Non-regulatory  income totaled $778,000 and increase of $128,000
     or 19.7%

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

     Total  interest  expense  increased  $70,000,  or 1.6%.  This was due to an
     increase  in  capitalized  interest  in  the  prior  year  on  construction
     projects.


RESULTS OF OPERATIONS  FOR THE NINE MONTHS ENDED  SEPTEMBER 2005 COMPARED TO THE
NINE MONTHS ENDED SEPTEMBER 2004

Summary
- -------

     Net  income  for  the  nine-month  period  ended  September  30,  2005  was
     $21,386,000,  equivalent  to $1.16 per  common  share on a  diluted  basis,
     compared  to net  income  of  $22,289,000  or $1.27  per share on a diluted
     basis, for the nine-months ended September 30, 2004. The primary driver for
     the  decrease  in  net  income  was  the  unfavorable   weather  conditions
     experienced in each of the quarters of 2005 compared to the same prior year
     periods.

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

     Operating  revenue  decreased  $3,301,000,  or 1.3%,  to  $242,888,000.  As
     disclosed  in the  following  table,  the  decrease was due to decreases in
     usage,  partially  offset  by  increases  in  rates  and  revenue  from new


                                       22



     customers.  Weather  impact was  unfavorable  as  rainfall  was much higher
     compared to prior year.  Temperatures were slightly cooler,  which resulted
     in a year-to-date  decrease of  approximately 6% in revenue from prior year
     water usage, with the largest monthly decrease of 14.0% occurring in April.

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

         Rate increases (net)                             $  8,984,000
         Decrease in usage by existing customers           (14,514,000)
         Usage by new customers                              2,229,000
                                                          -------------
              Net operating revenue decrease              $ (3,301,000)
                                                          =============

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

         Purchase Water Offset                            $    930,000
         Balance Accounts 2003                                (936,000)
         Balance Accounts 2004                               4,503,000
         Balance Accounts 2005                                  76,000
         General Rate Case (GRC)
         2001 Catch Up                                      (3,470,000)
         GRC 2002                                            1,782,000
         GRC 2003                                              298,000
         GRC 2004                                            1,658,000
         Step Rate 2005                                      3,810,000
         Hawthorne                                             280,000
         Hawaii                                                (41,000)
         New Mexico                                             94,000
                                                          -------------
             Total increase in rates                      $  8,984,000
                                                          =============

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

     Total  operating  expenses  were  $211,067,000  for the  nine-months  ended
     September 30, 2005, versus $212,217,000 for the same period in 2004, a 0.5%
     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  41.9% of total operating expenses.
     Water production expenses decreased 6.7% compared to last year.


                                       23


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

                                          Nine Months Ended September 30
                                          -------------------------------
                                              2005              2004
                                              ----              ----
             Well production                     47.5%             47.4%
             Purchased                           48.6%             48.5%
             Surface                              3.9%              4.1%
                                          ------------      ------------
             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:

                                          Nine Months Ended September 30
                                          ------------------------------
                                        2005          2004             Change
                                        ----          ----             ------
             Purchased water      $ 66,687,000    $ 70,580,000     $ (3,893,000)
             Purchased power        15,770,000      18,012,000       (2,242,000)
             Pump taxes              5,963,000       6,184,000         (221,000)
                                  ------------    ------------     ------------
                  Total           $ 88,420,000    $ 94,776,000     $ (6,356,000)
                                  ============    ============     ============

     Purchased  water cost  decreased  due to lower usage,  partially  offset by
     higher prices from water  wholesalers  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 $1,091,000 and $2,942,000 for 2005 and 2004,  respectively.  Purchased
     power and pump taxes also decreased due to lower production.

     Other operations expenses were $66,054,000,  increasing  $1,426,000 or 2.2%
     primarily  due  to   administration   and  general   expenses   which  were
     $36,137,000, increasing $1,169,000 or 3.3%. Payroll and benefits charged to
     operations expense increased $2,665,000, or 6.4%. Wages for union employees
     increased 2.5%,  effective January 1, 2005. Overall payroll costs (expensed
     and capitalized) increased 4.5% due to increases in the number of employees
     and higher  wage  rates.  Employee  and  retiree  medical  costs  increased
     $675,000,  or 10.5%.  Outside services,  which includes legal,  auditor and
     consultants  fees,  increased  $831,000,  or 47.2%  primarily due to higher
     consulting cost associated with information systems.  Workers' compensation
     expenses  decreased  $822,000,  or 47.2%. At September 30, 2005, there were
     846 employees and at September 30, 2004, there were 830 employees.

     Maintenance  expense was up for the  nine-months  ended September 30, 2005,
     increasing $1,442,000,  or 14.6%, due to increases in maintenance of meters
     of  $130,000,  well  maintenance  expense of  $68,000,  and  repairs of the
     following:  pumping  equipment  and  plant  of  $327,000,  water  treatment
     equipment of $115,000 and mains of $507,000.


                                       24


     Depreciation  and  amortization  expense  increased  $1,732,000,  or  8.8%,
     because of 2004  capital  expenditures  and due to  increased  depreciation
     rates  authorized by the Commission in eight  districts as part of the 2004
     GRC decision.

     Federal and state income  taxes  decreased  $281,000  due to lower  taxable
     income. The effective tax rate was 40.5% in 2005 and 40.0% in 2004.

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

     Other income was $2,849,000 for the  nine-months  ended September 30, 2005,
     compared to  $1,780,000  for the first nine months of 2004,  an increase of
     $1,069,000 that is primarily due to gains on sale of non-utility properties
     and increase in net non-regulated income.

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

     Total interest expense decreased  $179,000,  or 1.3%, due to an increase in
     capitalized  interest  of  $125,000,  on  construction  projects  and lower
     interest expense since short term borrowings were paid off.


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 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 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.


                                       25


Memorandum and Balancing Accounts
- ---------------------------------

     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  September  2005,  Cal  Water  received  authorization  from the CPUC to
     collect in rates approximately $899,000 previously recorded in a memorandum
     account for the Stockton district. Cal Water has pending memorandum account
     filings  for 2004 and  previous  years  offsettable  expenses  to refund to
     customers $1,258,000 over 12 months.


                                       26


     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.  (See
     previous items on Operating Revenue).

          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.

     There  were no rate  filings  approved  during  2004 for  Washington  Water
     Service Company, New Mexico Water Service Company, and Hawaii Water Service
     Company.

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 September 30,
     2005, and December 31, 2004, were $4,000,000 and $8,588,000,  respectively.
     These  amounts  exclude  pending  amounts  and  amounts  not yet  filed for
     recovery.


                                       27


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. The
     decision  also  ordered Cal Water to file an  application  for  approval to
     replace the  operations  and  customer  centers in its Chico  District  and
     treatment of the gain on sale proceeds.

     Decision D.03-09-021 also 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  necessary  and  useful  to  provide  utility   service.   ORA  also
     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 CWS 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.  Management believes
     it  has  fully  complied  with  the   Infrastructure  Act  and  that  ORA's
     conclusions and recommendations are without merit.  Accordingly,  Cal Water
     has  not  accrued  a  liability  in  the  financial  statements  for  ORA's
     recommendations.

     On  October  27,  2005,  the CPUC  extended  the  statutory  period for the
     proceeding  to January 3, 2006.  On  November 2, 2005,  Administrative  Law
     Judge  issued  his  Proposed  Decision  (PD).  The PD finds  that Cal Water
     appropriately  reclassified all properties as non-utility property prior to
     being sold. The criteria Cal Water used to reclassify  its properties  were
     reasonable  and consistent  with the  requirements  of the CPUC.  Since the
     properties were properly reclassified, CPUC approval was not required prior
     to the sale and no penalty is warranted. Furthermore, the PD finds that Cal
     Water  should be  allowed to include in rate base the full value of the new
     Chico customer center. This would result in an increase revenue requirement
     of approximately $171,000.

     However,  the PD does not  approve  the amount of sales  proceed (or gains)
     which  qualifies for reinvest under the  Infrastructure  Act. The PD defers
     the issues regarding  treatment of sale proceeds and allocation of gains on
     sale  to  its  R.04-09-003  proceeding,  where  the  CPUC  intents  to  set
     guidelines  and a specific  rule on  allocation of the gain on sale between
     shareholders  and  ratepayers.   Cal  Water  has  no  knowledge  when  this
     proceeding will be concluded.


                                       28


LIQUIDITY

Short-Term and Long-Term Debt
- -----------------------------

     There were no outstanding  short-term bank borrowings at September 30, 2005
     or  December  31,  2004,  on either the  Company's  or Cal  Water's  credit
     facility.  The Company 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 September 30, 2005, the Company was in compliance with
     the covenants of both facilities.

     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 third  quarter  common stock  dividend of $0.2850 per share was paid on
     August 19, 2005,  compared to a quarterly  dividend in the third quarter of
     2004  of  $0.2825.  This  was the  Company's  243rd  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
     September 30, 2005, the dividend  payout ratio is 83.6% of net income.  For
     the  entire  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 October 26, 2005 meeting,  the Board  declared the  Company's  244th
     consecutive  dividend  in the  amount of  $0.2850  per  share,  payable  on
     November 18, 2005, to stockholders of record on November 7, 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


                                       29



     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.


                                       30


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 $15.98 at September  30, 2005,  compared to
     $15.66 at December 31, 2004.

     There are  approximately  3,089  stockholders  of record for the  Company's
     common stock as of September 30, 2005.

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

     During the nine months  ended  September  30,  2005,  capital  expenditures
     totaled  $57,286,000;  $47,560,000  was from  Company-funded  projects  and
     $9,726,000 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  September  30,  2005,  construction  work-in-progress  was  $43,491,000
     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 $900,000 were incurred  related to 2004.  For 2005,  the
     Company estimates incurring $500,000 to $600,000 in external costs.


                                       31




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.

     Earlier  this year,  the Company  requested  its  customers  in the Salinas
     district to voluntarily 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 September 30, 2005, three wells have been put back on line
     and the Company is no longer asking  customers to take additional  steps to
     reduce water usage during peak hours.  The Salinas  district  accounted for
     4.4% of the Company's revenues for the third quarter and year-to-date ended
     September  30,  2005.  The  Company  does not  believe  that its request to
     voluntary  reduce  water usage  during peak hours  materially  impacted the
     financial results or cash flows of the Company.


                                       32



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  offsettable   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(b)  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 the Company's  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.


                                       33



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
     September  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 6. EXHIBITS

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


                                       34


                                   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

November 9, 2005


                               By:       /s/ John S. Tootle
                                  ----------------------------------------------
                                             JOHN S. TOOTLE
                                  Acting Vice President, Chief Financial Officer
                                                   and Treasurer



                                       35



                                  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


                                       36