UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 10-K

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

         For the fiscal year ended December 31, 2002

                                       OR

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

         For the transition period from .............to....................

         Commission file No.  1-13883

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

        Delaware                                         77-0448994
        --------                                         ----------
(State of Incorporation)                    (I.R.S. Employer Identification No.)

               1720 North First Street San Jose, California 95112
               (Address of Principal Executive Offices) (Zip Code)

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

           Securities registered pursuant to Section 12(b) of the Act:

   Title of Each Class:              Name of Each Exchange on Which Registered:
 Common Stock, $0.01 Par Value                New York Stock Exchange
Preferred Share Purchase Rights               New York Stock Exchange

           Securities registered pursuant to Section 12(g) of the Act:
                   Cumulative Preferred Stock, Par Value, $25
                                (Title of Class)

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 check mark if disclosure of delinquent  filers  pursuant to Item 405
of Regulation  S-K is not contained  herein,  and will not be contained,  to the
best of Registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [x]

Indicate  by check mark  whether  the  registrant  is an  accelerated  filer (as
defined in Rule 12b-2 of the Act). Yes _X_ No ___

The  aggregate  market value of the common stock held by  non-affiliates  of the
Registrant  was  $379,279,000  on June 28,  2002,  the last  business day of the
registrant's  most recently  completed  first fiscal  quarter.  The valuation is
based on the closing price of the registrant's common stock as traded on the New
York Stock Exchange.

Common stock outstanding at March 4, 2003 - 15,182,046 shares.



                                  EXHIBIT INDEX

                THE EXHIBIT INDEX TO THIS FORM 10-K IS ON PAGE 32

                       DOCUMENTS INCORPORATED BY REFERENCE

Designated  portions  of  Registrant's  Annual  Report to  Stockholders  for the
calendar year ended December 31, 2002 (2002 Annual Report) are  incorporated  by
reference  in Part I (Item 1),  Part II (Items 5, 6, 7, 7A and 8) and in Part IV
(Item 15(a)(1)).

Designated  portions  of the  Registrant's  Proxy  Statement  (Proxy  Statement)
relating  to the  2003  annual  meeting  of  stockholders  are  incorporated  by
reference  in Part III (Items 10, 11 and 12) as of the date the Proxy  Statement
was filed with the Securities and Exchange Commission (SEC). The Proxy Statement
was filed with the SEC via EDGAR on March 18, 2003.

                                      -2-


                                TABLE OF CONTENTS

                                                                         Page
                                                                         ----
PART I

Item 1.  Business......................................................    5
         Forward Looking Statements ...................................    5
         General Development of Business ..............................    5
         Rates and Regulation .........................................    6
         Financial Information about Industry Segments ................    7
         Narrative Description of Business ............................    7
         Geographical Service Areas and Number of Customers
             at Year-end ..............................................    9
         Water Supply .................................................   10
         Nonregulated Operations ......................................   13
         Utility Plant Construction Program ...........................   14
         Sale of Surplus Real Properties ..............................   15
         California Energy Situation ..................................   15
         Security at Company Facilities ...............................   15
         Quality of Water Supplies ....................................   15
         Competition and Condemnation .................................   16
         Environmental Matters ........................................   17
         Human Resources ..............................................   18
         Financial Information about Foreign and
             Domestic Operations and Export Sales .....................   18

Item 2.  Properties....................................................   18

Item 3.  Legal Proceedings.............................................   18

Item 4.  Submission of Matters to a Vote of Security Holders...........   19

Executive Officers of the Registrant...................................   20

PART II

Item 5.  Market for Registrant's Common Equity and Related
             Stockholder Matters.......................................   22

Item 6.  Selected Financial Data.......................................   22

Item 7.  Management's Discussion and Analysis of Financial Condition
             and Results of Operations.................................   22

Item 7A. Quantitative and Qualitative Disclosures About Market Risk....   22

Item 8.  Financial Statements and Supplementary Data...................   22

                                      -3-


Item 9.  Changes in and Disagreements with Accountants on
             Accounting and Financial Disclosure.......................   22

PART III

Item 10. Directors and Executive Officers of the Registrant............   23

Item 11. Executive Compensation........................................   23

Item 12. Security Ownership of Certain Beneficial Owners and
             Management and Related Stockholder Matters................   23

Item 13. Certain Relationships and Related Transactions................   23

Item 14. Controls and Procedures.......................................   23

PART IV

Item 15. Exhibits, Financial Statement Schedules, and Reports
             on Form 8-K...............................................   25

Independent Auditors' Report...........................................   26

Schedules..............................................................   27

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

Certifications under Rule 13a-14.......................................   30

Exhibit Index..........................................................   32

                                      -4-


                                     PART I

Item 1 Business.

         Forward Looking Statements

         This annual report,  including all documents incorporated by reference,
         contain  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; changes in
         regulatory  commissions'  policies and  procedures;  the  timeliness of
         regulatory   commissions'   actions   concerning   rate   relief;   new
         legislation;  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  our   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 our current or future debt that could  increase  our
         financing costs or affect our ability to borrow,  make payments on debt
         or  pay  dividends;  and,  other  risks  and  unforeseen  events.  When
         considering  forward-looking  statements,  you should  keep in mind the
         cautionary  statements included in this paragraph.  The Company assumes
         no obligation to provide public updates of forward-looking statements.

a. General Development of Business

         California Water Service Company (Cal Water) began business in 1926. On
         December 31, 1997,  California Water Service Group (Company) was formed
         as the parent company of Cal Water and a second subsidiary, CWS Utility
         Services (Utility Services). In 1999, the Company acquired Harbor Water
         Company and South  Sound  Utility  Company in the state of  Washington.
         These two  companies  were  merged  to form  Washington  Water  Service
         Company  (Washington  Water).  New Mexico  Water  Service  Company (New
         Mexico Water) was created in 2000. It acquired the assets of Rio Grande
         Utilities  Corporation  in July 2002.  During 2000,  we  completed  the
         largest  acquisition  in our history  with the  issuance  of  2,210,000
         shares of common stock in exchange for all of the outstanding shares of
         Dominguez Services  Corporation.  The acquisition,  which was accounted
         for as a pooling of  interests,  was  completed  on May 25,  2000.  The
         Company  is  the  largest  investor-owned  water  utility  west  of the
         Mississippi River and the second largest in the United States.

         Cal Water's regulated operations are subject to the jurisdiction of the
         California  Public  Utilities  Commission   (CPUC),Washington   Water's
         regulated  operations are subject to the jurisdiction of the Washington
         Utilities and  Transportation  Commission (WUTC) and New Mexico Water's
         regulated  operations are subject to the jurisdiction of the New Mexico
         Public   Regulation   Commission  (PRC).  Each  company  also  provides
         non-regulated  water related  services under  operation and maintenance
         agreements.  Jointly  the  CPUC,  WUTC and PRC are  referred  to as the
         commissions.

                                      -5-


         Upon formation of the holding  company  structure on December 31, 1997,
         each share of Cal Water  common stock was  exchanged  on a  two-for-one
         basis for the Company's common stock. Per share data was restated where
         necessary to reflect the effective  two-for-one stock split. Each share
         of Cal  Water  preferred  stock  was  converted  into one  share of the
         Company's  preferred stock. To maintain  relative voting strength,  the
         number of votes to which each  preferred  share is entitled was doubled
         from eight to 16.

         Cal  Water,  a  California   corporation   provides  water  service  to
         residential,  commercial,  public authority and industrial customers in
         75 California cities and communities  through 25 separate water systems
         or  districts.  In  its  24  regulated  systems,  which  serve  434,400
         customers,  rates and  operations  are subject to the  jurisdiction  of
         CPUC. An additional 6,100 customers receive service through a long-term
         lease of the City of Hawthorne  water  system,  which is not subject to
         CPUC regulation

         Washington Water, a Washington  corporation,  provides water service to
         14,400  customers  subject to the  regulation  of the WUTC.  Washington
         Water serves an additional  3,900 customers under operating  agreements
         with privately owned systems that are not subject to WUTC regulation.

         New Mexico Water provides  service to 2,400 water and 1,700  wastewater
         customers south of Albuquerque subject to PRC regulation.  Through this
         subsidiary,  we also provide  non-regulated meter reading service under
         contract with Los Alamos County in New Mexico.

         Our mailing address and principal executive offices are located at 1720
         North First Street, San Jose, California 95112-4598;  telephone number:
         408-367-8200.  We  maintain  a web site  that can be  accessed  via the
         Internet at http://www.calwater.com. In 2002, we began making available
         free of charge  through our website,  our annual  reports on Form 10-K,
         quarterly  reports  on Form  10-Q,  current  reports  on  Form  8-K and
         amendments to these  reports.  We make these  reports  available on our
         website on the same day they appear on the SEC's website.

         During the year ended  December  31,  2002,  there were no  significant
         changes in the kind of  products  produced  or  services we rendered or
         those  provided  by our  operating  subsidiaries,  or in our markets or
         methods of distribution.

         Rates and Regulation

         Our water  utility  rates and service for the  regulated  business  are
         subject to the  jurisdiction of the state regulatory  commissions.  The
         commissions'  decisions  and the timing of those  decisions  can have a
         significant impact on our operations and earnings.

         Since  our  24  California   regulated   operating  districts  are  not
         physically integrated, rates are set independently for each district as
         required by the CPUC. General office (headquarters)  expenses and plant
         investments  are  considered  separately  and allocated  ratably to the
         operating districts.

         General and Step Rate Increases

         General rate case (GRC) applications in California address district and
         general  office   operating  costs  and  capital   requirements  for  a
         forward-looking three-year period. GRC decisions typically authorize an
         immediate  rate  increase  and  annual  step  rate  increases  for  the
         three-year  cycle.  Step rate increases are generally  effective at the
         start of each calendar year, and are designed to maintain the return on
         equity (ROE)  authorized in the initial  decision in succeeding  years.
         Effective  January  1,  2003,  we are  required  to file a GRC for each
         operating  district every three years. Cal Water's GRC applications are
         submitted in July. According to the CPUC's processing schedule, a final
         decision  should be  expected  about 10 months  after the  filings  are
         accepted by the CPUC. During 2001, the CPUC did not issue decisions for
         our 2000 GRC  applications  until late summer or about 14 months  after
         they were submitted.  Decisions on our  applications  submitted in July
         2001  are  still  pending  after 19  months.  In  January  2003 a draft
         proposed  decision on our 2001 GRC rate case was circulated by the CPUC
         staff,

                                      -6-


         but we do not expect a final decision until the second quarter of 2003.
         In July 2002, we submitted GRC filings for seven districts plus General
         Office, which are still pending.

         Because districts are on different three-year GRC rate case cycles, the
         number of customers  affected by GRC filings  varies from year to year.
         For example,  our GRC applications filed in 2001 included 65 percent of
         Cal Water's customers, while our 2002 applications affect 17 percent of
         Cal Water's customers.

         Water rates for our  Washington  Water and New Mexico  Water  regulated
         operations  are set based on historic  12-month data. We can submit GRC
         applications  annually.  Regulatory  procedures do not provide for step
         rate increases or offset increases in these states.

         Offset Rate Increases

         In  California,  we charge to expense  increases  in  purchased  water,
         purchased power and pump taxes as they are incurred. Expenses for these
         categories  above levels included in prior GRC decisions are tracked in
         off-line expense balancing or memorandum  accounts.  The cost increases
         are  referred to as  "offsetable  expenses".  We do not record  revenue
         related to the balancing  accounts  until  authorized by the CPUC,  and
         then only as the  increased  costs are included in  customers'  monthly
         billings. When the CPUC authorizes a rate increase to recover the costs
         tracked in expense balancing or memorandum accounts,  the rate increase
         is referred to as an offset increase.

b. Financial Information about Industry Segments

         We  operate  primarily  in  one  business   segment,   the  supply  and
         distribution of water and providing water-related utility services.

c. Narrative Description of Business

         The Company is the sole shareholder of its four operating subsidiaries:
         California  Water Service  Company,  New Mexico Water Service  Company,
         Washington Water Service Company and CWS Utility Services.

         We conduct the Company's  business through our operating  subsidiaries.
         Our   business   consists  of  the   production,   purchase,   storage,
         purification,  distribution and sale of water for domestic, industrial,
         public and irrigation  uses, and for fire  protection.  We also provide
         water-related  services under agreements with  municipalities and other
         private companies.  The nonregulated services include full water system
         operation  and  billing  and  meter  reading   services.   Nonregulated
         operations also include the lease of  communication  antenna sites. Our
         earnings  may be  significantly  enhanced  by the sale of surplus  real
         property.  We have a program to dispose of surplus real  properties and
         to reinvest  the proceeds in its  business.  See "Sales of Surplus Real
         Properties" below.

         The operating  results from the water business  fluctuate  according to
         the demand for water which is often influenced by seasonal  conditions,
         such as summer  temperatures or the amount and timing of  precipitation
         in the Company's service territories.  Our revenue, expenses and income
         are  affected  by changes in water  sales.  Costs,  such as payroll and
         benefits,  depreciation,  interest rates on long-term debt and property
         taxes are more  predictable  and remain  fairly  constant,  and are not
         significantly  impacted by variations in the amount of water sold. As a
         result,  earnings  are  highest in the high use,  warm  weather  summer
         months and lowest in the cool winter  months when most  rainfall  takes
         place in our service territories.

         We distribute  water in accordance with accepted water utility methods.
         We hold franchises and permits in the cities and  communities  where we
         operate.  The  franchises  and permits allow us to operate and maintain
         facilities in public streets and right of ways as necessary.

                                      -7-


         We operate the City of Hawthorne  water  system  under a 15-year  lease
         that  commenced  in  February  1996.  In  accordance   with  the  lease
         agreement,  we receive all revenue from operating the system and we are
         responsible  for paying the operating  costs.  At the end of the lease,
         the undepreciated  capital improvements that we have made in the system
         during our period of operation  will be  purchased  by the City.  Under
         other contract  arrangements,  we operate three municipally owned water
         systems,  numerous privately owned water systems and two recycled water
         distribution  systems. We also provide billing and customer services to
         a number of municipalities.

         We intend to continue  exploring  opportunities to expand our regulated
         and nonregulated  businesses.  The  opportunities  could include system
         acquisitions,  lease  arrangements  similar  to the  City of  Hawthorne
         contract,  full service system  operation and  maintenance  agreements,
         meter  reading  and  billing  contracts,   and  other  utility  related
         services.  We believe that a holding  company  structure  makes us more
         competitive in providing  nonregulated utility services,  which are not
         subject to jurisdiction of the commissions.  We continually investigate
         new business opportunities in the western United States as evidenced by
         our  expansion  into the states of New Mexico and  Washington,  and our
         plans to expand to the state of  Hawaii as  described  in  Management's
         Discussion   and  Analysis  of  Financial   Condition  and  Results  of
         Operations  in  the  2002  Annual  Report  to  stockholders   which  is
         incorporated into this Form 10-K report by reference.

                                      -8-


         Geographical Service Areas and Number of Customers at Year-end

         The  Company's  principal  markets for its  services are users of water
         within the Company's service areas. The Company's  geographical service
         areas or districts for both the regulated and  nonregulated  operations
         and the approximate number of customers served in each area at December
         31, 2002 are listed below.



                                                                                                     Regulated         Non-regulated
                                                                                                     ---------         -------------
                                                                                                                      
SAN FRANCISCO BAY AREA
  Mid-Peninsula (serving San Mateo and San Carlos)                                                      35,900
 South San Francisco (including Colma and Broadmoor)                                                    16,500
  Bear Gulch (serving Menlo Park, Atherton, Woodside
     and Portola Valley)                                                                                17,600              4,200
  Los Altos (including portions of Cupertino, Los Altos Hills,
     Mountain View and Sunnyvale)                                                                       18,400
  Livermore                                                                                             17,400                200
                                                                                                       -------            -------
                                                                                                       105,800              4,400
                                                                                                       -------            -------
SACRAMENTO VALLEY
  Chico (including Hamilton City)                                                                       24,400
  Oroville                                                                                               3,500
  Marysville                                                                                             3,800
  Dixon                                                                                                  2,800                300
  Willows                                                                                                2,300
 Redwood Valley (Lucerne, Duncans Mills, Guerneville, Dillon
     Beach, portion of Santa Rosa)                                                                       1,900
                                                                                                       -------            -------
                                                                                                        38,700                300
                                                                                                       -------            -------
SALINAS VALLEY
  Salinas                                                                                               27,300                300
  King City                                                                                              2,200                 --
                                                                                                       -------            -------
                                                                                                        29,500                300
                                                                                                       -------            -------
SAN JOAQUIN VALLEY
  Bakersfield                                                                                           59,300             29,000
  Stockton                                                                                              41,900
  Visalia                                                                                               32,200
  Selma                                                                                                  5,400
  Kern River Valley (Bodfish, Kernville, Lakeland, Mountain
     Shadows, Onyx, Squirrel Valley, South Lake and Wofford Heights)                                     4,100                500
  Antelope Valley (Fremont Valley, Lake Hughes, Lancaster and
     Leona Valley)                                                                                       1,300                500
                                                                                                       -------            -------
                                                                                                       144,200             30,000
                                                                                                       -------            -------
LOS ANGELES AREA
  East Los Angeles (including portions of
     the cities of Commerce and Montebello)                                                             26,500              2,700
  Hermosa Redondo (serving Hermosa Beach,
      Redondo Beach and a portion of Torrance)                                                          25,800             13,400
  Dominguez (Carson and portions of Compton, Harbor City,
     Long Beach, Los Angeles and Torrance)                                                              33,100
  Palos Verdes (including Palos Verdes Estates, Rancho Palos Verdes,
     Rolling Hills Estates and Rolling Hills)                                                           23,800
  Westlake (a portion of Thousand Oaks)                                                                  7,000
  Hawthorne (leased municipal system)                                                                                       6,100
                                                                                                       -------            -------
                                                                                                       116,200             22,200
                                                                                                       -------            -------
CALIFORNIA TOTAL                                                                                       434,400             57,200

NEW MEXICO (Albuquerque and Los Alamos)                                                                  4,100             23,000
WASHINGTON (Gig Harbor and near Olympia)                                                                14,400              3,900
                                                                                                       -------            -------

      COMPANY TOTAL                                                                                    452,900             84,100
                                                                                                       =======            =======


                                      -9-


         Water Supply

         Cal Water  obtains  its water  supply  from  wells,  surface  runoff or
         diversion,  and by purchase  from public  agencies and other  wholesale
         suppliers.  Our supply has been adequate to meet  consumption  demands,
         however,   during  periods  of  drought  some  of  our  districts  have
         experienced  mandatory  water  rationing.   California's  rainy  season
         usually  begins in November and continues  through March with December,
         January and February historically  recording the most rainfall.  During
         winter months,  reservoirs and underground  aquifers are replenished by
         rainfall.  Snow  accumulated  in the  mountains  provides an additional
         water  source when  spring and summer  temperatures  melt the  snowpack
         producing  runoff into streams and  reservoirs,  and also  replenishing
         underground aquifers.

         Washington  receives  rain in all  seasons  with the  majority  falling
         during winter  months.  Washington  Water draws all its water supply by
         pumping from wells.

         New Mexico  Water  pumps all of its water  supply  from wells  based on
         water rights owned by the Company.  Rainfall occurs in all seasons, but
         is heaviest in the summer monsoon season.

         Our water  business is seasonal  in nature and weather  conditions  can
         have a  pronounced  effect on  customer  usage  and thus our  operating
         revenues and net income.  Customer  demand for water generally is lower
         during the normally cooler and rainy winter months. Demand increases in
         the spring when warmer weather returns and the rains end, and customers
         use more water for outdoor purposes, such as landscape irrigation. Warm
         temperatures during the generally dry summer months result in increased
         demand.  Water usage declines during the fall as temperatures  decrease
         and the rainy season begins.

         During  years in which  precipitation  is  especially  heavy or extends
         beyond the spring into the early summer,  customer  demand can decrease
         from historic  normal  levels,  generally due to reduced  outdoor water
         usage. Likewise, an early start to the rainy season during the fall can
         cause a  decline  in  customer  usage  and have a  negative  impact  on
         revenue.  When summer temperatures are cooler than normal,  water usage
         is generally  lower and can result in lower  revenue and a reduction in
         our earnings. A warmer than normal summer can result in higher customer
         usage and an increase in our revenue.

         During years of less than normal rainfall, customer demand can increase
         as  outdoor  water  usage  continues  into the fall  and  winter.  When
         rainfall is below average for consecutive years, drought conditions can
         develop and certain customers may be required to reduce  consumption to
         preserve  available  supply.  As an example,  California  experienced a
         six-year period when rainfall was annually below historic average.  The
         drought  period  ended with the winter of  1992-93.  During that period
         some of our districts had water-rationing requirements imposed on their
         customers.  In certain  districts,  penalties  were  collected from the
         customers who exceeded monthly allotments. During past drought periods,
         the  CPUC has  allowed  modifications  to our  customer  billings  that
         provided  us a means to recover a portion  of  revenue  that was deemed
         lost due to conservation measures.

         As noted above, our Washington Water and New Mexico Water  subsidiaries
         obtain their entire water supply from wells.  Historically,  about half
         of Cal Water's water supply is purchased from wholesale  suppliers with
         the balance pumped from wells. During 2002, approximately 52 percent of
         the Cal Water supply was obtained from wells,  48 percent was purchased
         from  wholesale  suppliers  and less than one percent was from  surface
         supplies.  Well water is generally less expensive and Cal Water strives
         to maximize the use of its well sources in districts  where there is an
         option between well or purchased supply sources.

         Our four California  water treatment plants  (Bakersfield,  Bear Gulch,
         Oroville and Redwood Valley) are designed to process 17 million gallons
         per  day.  Completion  of the  20  million  gallon  per  day  Northeast
         Bakersfield surface water treatment plant during 2003 will increase the
         quantity  of water we can  produce  from  surface  supplies.  Water for
         operation  of the  plant  will be drawn  from the  Kern  River  under a
         long-

                                      -10-


         term contract with the City of Bakersfield. We will remove from service
         the small existing  Bakersfield  treatment  plant when the new plant is
         placed in service.

         During 2002, we delivered 132 billion gallons of water to the Company's
         customers  compared to 127 billion  gallons in 2001.  Our 2002  average
         daily  water  production  was 352  million  gallons,  while the maximum
         single day production was 647 million gallons.  By comparison,  in 2001
         our average  daily  water  production  was 348 million  gallons and the
         maximum single day production was 663 million gallons.

         The  following  table shows the  quantity of water we purchased in each
         California operating district during 2002.



                                          Supply
             District                     Purchased         Source of Purchased Supply
             --------                     ---------         --------------------------
                                                      
         SAN FRANCISCO BAY AREA
             Mid-Peninsula                 100%             San Francisco Water Department
             South San Francisco            88%             San Francisco Water Department
             Bear Gulch                     91%             San Francisco Water Department
             Los Altos                      75%             Santa Clara Valley Water District
             Livermore                      70%             Alameda County Flood Control
                                                              and Water Conservation District

         SACRAMENTO VALLEY
             Oroville                       84%             Pacific Gas and Electric Co.
             Redwood Valley                 76%             County of Lake

         SAN JOAQUIN VALLEY

             Antelope/Kern                   8%             Antelope Valley East Kern WD
             Bakersfield                    14%             Kern County Water Agency
             Stockton                       58%             Stockton-East Water District

         LOS ANGELES AREA
             East Los Angeles               74%             Central Basin Municipal Water District
             Dominguez                      79%             West Basin and Central Basin Municipal
                                                              Water Districts
             Hawthorne                      87%             West Basin Municipal Water District
             Hermosa Redondo                91%             West Basin Municipal Water District
             Palos Verdes                  100%             West Basin Municipal Water District
             Westlake                      100%             Calleguas Municipal Water District



         The balance of our required  supply for the above districts is obtained
         from  wells,  except in our Bear Gulch  district  where the  balance is
         obtained  from  surface  runoff  from  the  local  watershed.   In  our
         Bakersfield  and  Oroville  districts,  the water we purchase is from a
         surface  supply.  The surface  sources are processed  through our water
         treatment plants before being delivered to the distribution system.

         The Chico,  Marysville,  Dixon and Willows  districts in the Sacramento
         Valley,  the Salinas and King City districts in the Salinas Valley, and
         the Selma and Visalia  districts in the San Joaquin Valley obtain their
         entire supply from wells.

         Our  purchases  for the Los Altos,  Livermore,  Oroville,  Stockton and
         Bakersfield  districts are pursuant to long-term  contracts expiring on
         various dates after 2011.

                                      -11-


         The water  supplies we purchase  for the  Dominguez,  East Los Angeles,
         Hermosa-Redondo,  Palos Verdes and Westlake districts,  and the City of
         Hawthorne  system  are  provided  by  public  agencies  pursuant  to an
         obligation of continued  non-preferential  service to purveyors  within
         the agencies' boundaries.

         Purchases  for the South San  Francisco,  Mid-Peninsula  and Bear Gulch
         districts are in accordance  with long-term  contracts we have with the
         San Francisco Water Department (SFWD) expiring on June 30, 2009.

         We  anticipate  that we will be able to renew each of the water  supply
         contracts as they expire.  The price of  wholesale  water  purchases is
         subject to pricing changes imposed by the various wholesale  suppliers.
         Price changes are generally beyond our control.  We expect that we will
         be allowed to recover the wholesale water  suppliers' rate increases in
         customer  future rates,  although  recovery is subject to a decision by
         the CPUC.

         Shown  below are  wholesaler  price  rates and  increases  that  became
         effective for our operating districts in 2002, and estimated wholesaler
         price rates changes for 2003.



                               2002                                       2003
                              ------                                     ------
                  Effective   Percent                       Effective    Percent
   District        Month      Change      Unit Cost          Month       Change      Unit Cost
   --------        -----      ------      ---------          -----       ------      ----------
                                                                   
Antelope/Kern                    0.0%        $170/af           July       29.4%         $220/af
Bakersfield                      0.0%         137/af           July       13.1%          155/af
Bear Gulch                       0.0%       0.88/ccf           July       22.0%        1.03/ccf
Dominguez                        0.0%         528/af           Jan.        0.8%          532/af
East Los Angeles                 0.0%         478/af           Jan.        0.8%          482/af
Hawthorne                        0.0%         528/af           Jan.        0.8%          532/af
Hermosa Redondo                  0.0%         528/af           Jan.        0.8%          532/af
Livermore            Jan.        1.7%      1.258/ccf           Jan.        2.5%       1.290/ccf
Los Altos            July        2.4%         420/af           July        8.3%          455/af
Oroville                         0.0%      69,200/yr           Jan.        8.4%       75,000/yr
Palos Verdes                     0.0%         528/af           Jan.        0.8%          532/af
Mid Peninsula                    0.0%       0.88/ccf           July       22.0%        1.03/ccf
Redwood Valley       May        13.2%       41.88/af           May         5.1%        44.00/af
So. San Francisco                0.0%       0.88/ccf           July       22.0%        1.03/ccf
Stockton             April     -18.4%     233,346/mo           April      46.6%      342,146/mo
Westlake             Jan.        1.2%         560/af           Jan.        0.7%          564/af


af = acre foot;           ccf = hundred cubic feet;
yr = fixed annual cost;   mo = fixed monthly cost

         While the  water  supply  outlook  for 2003 is good,  California  faces
         long-term water supply  challenges.  We actively work to meet the water
         supply challenges by continuing to educate our customers on responsible
         water use practices,  particularly  in the districts with  conservation
         programs approved by the CPUC.

         Rainfall  throughout our service areas for the 2002-2003 season is near
         normal as of March 14, 2003, as is the mountain snowpack.  Water levels
         in underground  aquifers that provide supply to our districts served by
         well water  improved in recent years due to above average  rainfall and
         most regions  have  recorded  positive  changes in  groundwater  levels
         during that period.  Regional groundwater management planning continues
         as required.  Existing laws provide a mechanism  for local  agencies to
         maintain control of their  groundwater  supply.  We continually  update
         water  supply  long range  projections  and work with  local  wholesale
         suppliers to ensure an adequate  future  supply to meet our  customers'
         needs.

         For a number of years,  we have worked with the  Salinas  Valley  water
         users and the Monterey County Water Resources Agency (MCWRA) to address
         seawater  intrusion  into the water  supply for the  Salinas  district.
         MCWRA  completed  construction of the  Castroville  Seawater  Intrusion
         Project in 1998.  This project is designed to deliver up to 20,000 acre
         feet of recycled  water  annually to  agricultural  users in the

                                      -12-


         nearby  Castroville  area.  It is  intended to help  mitigate  seawater
         intrusion into the region by reducing the need to pump groundwater.  To
         date, the project has produced marginal results.

         We continue  working with the City and County of San  Francisco and the
         cities of San Bruno and Daly City, to prepare a groundwater  management
         plan for the Westside Basin from which our South San Francisco district
         pumps a portion of its supply. The plan will address a protest that has
         been filed  concerning  the  extraction  of water by pumping  from this
         local  basin.  Our pumping  levels have  remained  within a  consistent
         range.

         Additionally,  we  worked  with  the  City  of  San  Francisco  in  its
         development  of a long-range  water  supply  master plan for the entire
         area to which the SFWD is the wholesale water  supplier.  Our South San
         Francisco,  Mid-Peninsula and Bear Gulch districts are included in SFWD
         service area.  The plan has been  completed,  but no further action has
         taken place. Cal Water also signed a two year conjunctive use agreement
         with the City and  County  of San  Francisco  regarding  the  South San
         Francisco district well supply. When available,  the City and County of
         San Francisco will provide  surplus water to us at a reduced price.  In
         exchange,  we will not  operate  our South  San  Francisco  wells.  The
         agreement  is intended to assist in  protecting  the local  underground
         water basin.

         Nonregulated Operations

         Our  nonregulated   operations   include  full  service  operation  and
         maintenance of water systems for cities and private  owners,  operation
         of  recycled  water  systems,  utility  billing  services,   laboratory
         services,  water  rights  brokering,  sales of surplus  properties  and
         leases of antenna sites.

         Nonregulated  revenue that we receive from water system  operations  is
         generally determined on a fee per customer basis. With the exception of
         our  agreement  for  operation of the City of Hawthorne  water  system,
         revenue and expenses from nonregulated  operations are accounted for in
         other income on a pretax basis. We include revenue and expenses for the
         City of Hawthorne  lease in operating  revenue and  operating  expenses
         because the Company is entitled to retain all customer  billings and is
         generally responsible for all operating expenses.

         We operate  municipally  owned water  systems  under  contract  for the
         cities  of  Bakersfield,  Commerce  and  Montebello,  and for  numerous
         private  water  company  systems in the Antelope  Valley,  Bakersfield,
         Livermore,  Kern,  Redwood Valley,  Salinas and Visalia  districts.  In
         Washington,  we operate  numerous  private water systems under contract
         arrangements.   We  also  operate  wastewater   collection  systems  in
         Bakersfield and Livermore.  With the exception of the 15-year Hawthorne
         lease discussed below, the terms of the operating agreements range from
         one-year to three-year periods with provisions for renewals.  We signed
         the first operating agreement in 1977 with the City of Bakersfield .

         In the Los  Angeles  Basin,  we  operate  recycled  water  distribution
         systems for the West Basin and Central Basin municipal water districts.
         Our  engineering  department  also  provides  services  for  these  two
         recycled water systems.

         Under an  agreement  with the City of Menlo Park,  we provide  contract
         meter  reading,  billing  and  customer  service  for the city's  water
         customers. Meter reading is performed under contract between us and the
         City of Manhattan  Beach in California and in New Mexico for the County
         of Los Alamos.  We also provide sewer and/or refuse billing services to
         seven municipalities.

         Since  February  1996, we have operated the City of  Hawthorne's  6,100
         account  water  system under terms of a 15-year  agreement  between the
         city and us.  The  system  which is  located  near our  Hermosa-Redondo
         district  serves  about  half  of  Hawthorne's  population.  The  lease
         required us to make an up-front  $6.5 million lease payment to the City
         which we are  amortizing  over the lease  term.  Additionally,  we make
         annual  lease  payments to the City of  $100,000  indexed to changes in
         water rates.  Under the lease  agreement,  we are  responsible  for all
         aspects of system operation and capital improvements, although title to
         the system and system  improvements reside with the City. At the end of
         the lease,  the city is required to

                                      -13-


         reimburse us for the unamortized value of capital  improvements we made
         during the term of the lease. In exchange,  we receive all revenue from
         the water system which amounted to $5.1 million in 2002.

         During  1997,  we signed an  agreement  with the Rural North  Vacaville
         Water  District  near our Dixon  district  to design  and build a water
         distribution system.  Construction of the system has been completed and
         we began  operating  the system in February  2003 under a contract with
         the water  district.  The new system will  initially  provide  water to
         about 300 customers.

         We lease 55 antenna sites to  telecommunication  companies  which place
         equipment at various  operating  properties.  Individual lease payments
         range from $700 to $2,600 per month.  The antennas are used in cellular
         phone and personal communication applications. We continue to negotiate
         new leases for similar uses.

         We provide laboratory services to San Jose Water Company and Great Oaks
         Water  Company,  and for the systems that we serve under  operation and
         maintenance agreements, and for numerous small water systems.

         Utility Plant Construction Program

         We continually  extend,  enlarge and replace our facilities as required
         to meet increasing demands and to maintain the water systems. We obtain
         construction  financing from  operations,  short-term bank  borrowings,
         advances for construction and contributions in aid of construction that
         are funded by developers.  The amounts  received from these sources are
         shown in our "Statement of Cash Flows" on page 40 of the Company's 2002
         Annual  Report which is  incorporated  into this document by reference.
         Advances  for  construction  are  cash  deposits  from  developers  for
         construction  of water  facilities  or  water  facilities  deeded  from
         developers. The advances are generally refundable without interest over
         a period of 40 years by equal annual payments.  Contributions in aid of
         construction  consist of  nonrefundable  cash  deposits  or  facilities
         transferred  from   developers,   primarily  for  fire  protection  and
         relocation  projects.  We  cannot  control  the  amount  received  from
         developers  which  fluctuates  from  year  to  year  as  the  level  of
         construction  activity carried on by developers  varies. It is impacted
         by the demand for housing,  commercial development and general business
         conditions, including interest rates.

         The 2003 Company-funded construction budget is $51.7 million, exclusive
         of  additions   and   improvements   financed   through   advances  for
         construction and contributions in aid of construction. It includes $4.5
         million  for the fifth year of our  five-year  program to  construct  a
         water  treatment  plant to  accommodate  growth and meet water  quality
         standards in our  Bakersfield  district.  Construction  of the plant is
         proceeding  on-time  and  on-budget.  Over  the  five-year  period,  we
         estimate  the plant and related  pumping and pipeline  facilities  will
         cost $49.0 million.  The 2003 budget  categories  are: $6.1 million for
         land and structures,  $9.6 million for water  treatment,  $11.2 million
         for new and  replacement  water  mains,  $12.1  million  for new wells,
         pumping equipment and storage facilities, $5.9 million for services and
         meters,  and $6.8 million for vehicles and  equipment.  We plan to fund
         the budget with funds from operations,  short-term bank borrowings, and
         long-term debt and equity financing.  New subdivision construction will
         be  financed  by  developers'  non-refundable  contributions  in aid of
         construction and refundable advances for construction.

         The 2002 construction budget was $77.7 million,  exclusive of additions
         and  improvements   financed  through  advances  for  construction  and
         contributions in aid of construction.  The budget was for the following
         areas: land and structures,  $4.1 million;  wells,  pumping and storage
         facilities,  $10.7 million; water treatment and purification equipment,
         $29.6 million; distribution systems $17.3 million; services and meters,
         $6.2  million;  other  equipment,  $9.8  million.  The budget  included
         significant   expenditures   for  water   treatment  and   distribution
         facilities,  especially in connection  with the water  treatment  plant
         being constructed in our Bakersfield district.

         In 1996,  Congress  enacted  legislation  which  exempted  from taxable
         income   proceeds   received  from  developers  to  fund  advances  for
         construction and contributions in aid of construction,  except payments
         for  installation  of  services.  Services  represent  about 20% of the
         deposits we receive from developers. The

                                      -14-


         legislation  also  provided  that  water  utility  plant  additions  be
         depreciated  for federal tax purposes on a  straight-line  25-year life
         basis. In 2000,  developer  deposits for fire protection  services were
         also exempted from tax. The federal tax exemption of developer payments
         reduces our cash flow requirements for income tax payments.

         Sale of Surplus Real Properties

         When  properties  are no longer  used and  useful  for  public  utility
         purposes,  we are no longer  allowed to earn a return on our investment
         in the property in the regulated business.  The surplus property may be
         transferred  out of the  regulated  subsidiary  and can be offered  for
         sale.  Income from the sale of surplus  properties  depends not only on
         changes in operations, but also on local real estate market conditions.
         In  2002,  we  sold  four  surplus  properties  for a  pretax  gain  of
         $2,980,000.  In 2001, we sold two surplus  properties for a pretax gain
         of $3,864,000.

         As  discussed  in  Management's  Discussion  and Analysis of Results of
         Operations  and  Financial  Condition,  the  administrative  law  judge
         assigned to Cal  Water's  2001 GRC  proceedings  has drafted a proposed
         decision suggesting a change in the rate-setting practice regarding the
         treatment of gains on the sale for surplus  property.  If the proposals
         were adopted by the CPUC,  they would have a detrimental  impact on the
         Company's  surplus  real  estate  sales  program.  The  draft  proposed
         decision on treatment of gains on sale of properties  could result in a
         reduction  of earnings  and the rate base on which the CPUC  determines
         the Cal Water's future earnings.  However, because this is only a draft
         that does not recommend  specific actions,  we cannot predict the final
         outcome of this matter.  Since 1997, we have recorded  $10.4 million in
         pretax gains under the surplus property sale program.

         California Energy Situation

         The California  energy crisis has been well publicized.  In response to
         supply  shortages,  electric power rates have increased  significantly.
         Our purchased  power costs increased $1.8 million in 2002, $6.0 million
         in 2001 and $0.7 million in 2000.  The 2002 cost increase was caused by
         a 5% increase in well production and higher electric rates paid through
         May 2002  compared to 2001's  electric  rates.  The 2001  increase  was
         primarily  the result of an average 48% increase in the electric  rates
         we paid in  California.  The purchased  power cost increase in 2000 was
         due mainly to a 3% increase in water production.

         There is still  uncertainty  about the state's  ability to avoid future
         rolling electric blackouts, however, we did not experience any electric
         blackout  during  2002.  We will  continue  our efforts to use power as
         efficiently  as possible  and at the lowest cost to our  customers.  We
         maintain  backup  power  systems  to  continue  water  service  to  our
         customers if the power companies' supplies are interrupted. Many of our
         wellsites  are  equipped  with  emergency  electric   generators.   The
         generators  are  designed  to  produce  electricity  to keep the  wells
         operating  during power outages.  Storage tanks also provide  customers
         with water during blackout periods.

         Security at Company Facilities

         As a result of the  September 11, 2001  terrorist  attacks in New York,
         Washington,  D.C. and Pennsylvania,  we have heightened security at our
         facilities  and taken added  precautions to safeguard our employees and
         the water we  deliver  to our  customers.  While we do not make  public
         comments  about the details of our security  programs,  we have been in
         contact  with  federal,  state and local law  enforcement  agencies  to
         coordinate and improve water delivery  systems  security.  We have also
         assigned a high  priority to completing  work  necessary to comply with
         new Environmental Protection Agency requirements concerning security of
         water facilities. This effort encompasses all of our operations.

         Quality of Water Supplies

         We maintain operating  practices to produce potable water in accordance
         with   acceptable   water  utility   practices.   Water   entering  the
         distribution systems from surface sources is treated in compliance with
         federal and state Safe Drinking Water Act (SWDA)  standards.  Most well
         supplies are  chlorinated  for  disinfection.  Water  samples from each
         water system are analyzed on a regular,  scheduled  basis in

                                      -15-


         compliance with regulatory  requirements.  The Company operates a state
         certified  water  quality  laboratory  at its San Jose  General  Office
         facility that provides testing for most California operations.  Certain
         tests in California  are  contracted  with  independent  certified labs
         qualified under the  Environmental  Laboratory  Accreditation  Program.
         Local independent state certified labs provide water sample testing for
         the Washington and New Mexico districts.

         In recent  years,  federal and state  water  quality  regulations  have
         continued to increase water testing requirements.  Changes in the SDWA,
         which  are  expected  to bring  treatment  costs  more in line with the
         actual public health  threats  posed by  contaminants,  were enacted by
         Congress  during 1996.  The SDWA continues to be amended to reflect new
         public  health  concerns.  We monitor  water  quality  and  upgrade our
         treatment   capabilities  to  maintain   compliance  with  the  various
         regulations continues. These activities include:

         o        monitoring  of all  vulnerable  sources  for MTBE,  a gasoline
                  additive intended to reduce air pollution that has been widely
                  used in California

         o        monitoring  all sources for  Chromium 6 coming from natural or
                  industrial sources for potential future treatment requirements

         o        upgrading   laboratory   equipment  and  enhancing  analytical
                  testing capabilities

         o        installation of dedicated sample sites to assure water samples
                  are drawn at a secure source

         o        maintaining a federal and state approved compliance monitoring
                  program required by the Safe Drinking Water Act

         o        completion of a source water assessment  program for all water
                  supplies

         o        completion of mandatory Information Collection Rule monitoring
                  for specified water systems

         o        ongoing training of laboratory and operating personnel

         o        installation of disinfection treatment at all well sources

         o        several well treatment  systems that treat for elevated levels
                  of iron and manganese

         o        construction  of a new iron and manganese  treatment  plant in
                  the leased Hawthorne system

         o        installation  and  operation  of  several  granular  activated
                  carbon  (GAC)  filtration  systems  for  removal  of  hydrogen
                  sulfide or volatile organic chemicals

         o        assessing  arsenic removal  technologies that will be required
                  at 75  wells  in  developing  a  coordinated  plan to meet new
                  arsenic  water quality  standards  mandated by EPA at 10 parts
                  per billion

         Competition and Condemnation

         Our operating  companies,  Cal Water,  New Mexico Water and  Washington
         Water are regulated  public  utilities,  providing water service within
         filed service areas approved by the commissions.  New Mexico Water also
         provides  regulated  wastewater  services.  Under  California  laws, no
         privately owned public utility may compete within any service territory
         that we already serve without first  obtaining a certificate  of public
         convenience and necessity from the CPUC. Issuance of such a certificate
         would only be made upon finding that our service is  deficient.  To our
         knowledge,  no application  to provide  service to an area we serve has
         been made.

         California  law  provides  that  whenever  a public  agency  constructs
         facilities  to  extend a  utility  system  into the  service  area of a
         privately owned public  utility,  such an act constitutes the taking of
         property  and  requires  reimbursement  to the  utility  for its  loss.
         Further, the state's  constitution and statutes allows  municipalities,
         water  districts  and other  public  agencies to own and operate  water
         systems.  These  agencies are empowered to condemn  properties  already
         operated by  privately  owned public  utilities.  The agencies are also
         authorized to issue bonds,  including revenue bonds, for the purpose of
         acquiring or constructing  water systems.  However,  if a public agency
         were to acquire utility property by eminent domain action,  the utility
         would be entitled to just  compensation for its loss. To our knowledge,
         no municipality, water district or other public agency is contemplating
         or has any action pending to acquire or condemn any of our systems.

         In  recent  years,   consolidation   within  the  water   industry  has
         accelerated.  A number of publicly  traded  water  companies  have been
         acquired or merged into larger domestic companies. Several acquisitions
         of publicly

                                      -16-


         traded  companies  have  also been  completed  by much  larger  foreign
         companies.  We  have  participated  in the  industry  consolidation  by
         acquiring   Dominguez   Services   Corporation  and  by  expanding  our
         operations  into  Washington  and New  Mexico,  by making  other  small
         acquisitions and pursuing expansion of our nonregulated operations.  In
         2002, we also agreed to acquire a water system on the island of Maui in
         Hawaii.  The Hawaii acquisition is expected to close in 2003. We intend
         to  continue  pursuit of  opportunities  to expand our  business in the
         western United States.

         Environmental Matters

         Our  operations  are  subject to  environmental  regulation  by various
         governmental authorities. Issues related to water quality are discussed
         under the Management's Discussion and Review section of the 2002 Annual
         Report to stockholders.

         Our  environmental  affairs  program is designed to provide  compliance
         with  underground  and above  ground  fuel  storage  tank  regulations,
         hazardous materials management plans, hazardous waste regulations,  air
         quality permitting requirements,  wastewater discharge limitations, and
         employee safety issues related to hazardous materials.  We are actively
         involved in the formulation of air quality  standards  related to water
         utilities.   Also,   we  are   proactive  in  looking  to   alternative
         technologies  in meeting  environmental  regulations and continuing the
         traditional practices of water quality.

                                      -17-


         Human Resources

         At year-end 2002, we had 802 employees, including 12 employees who were
         added  in  New  Mexico  with  the  acquisition  of Rio  Grande  Utility
         Corporation.  At the end of 2001,  there were 783  employees and at the
         end  of  2000,  797  employees.  In  California,  most  non-supervisory
         employees  are  represented  by the Utility  Workers  Union of America,
         AFL-CIO,  except  certain  engineering  and  laboratory  employees  are
         represented  by  the  International   Federation  of  Professional  and
         Technical   Engineers,   AFL-CIO.   In  December   2002,   the  Company
         successfully  negotiated  new  three-year  agreements  with both unions
         covering 2003 through 2005.  Wage  increases  under the new  agreements
         will be 1% in  2003,  1.5%  in 2004  and 2% in  2005.  Improvements  in
         employee  benefit plans were also  negotiated.  Employees at Washington
         Water and New Mexico Water do not belong to unions.

d. Financial Information about Foreign and Domestic Operations and Export Sales.

         We make no export sales.

Item 2. Properties.

         Our  physical  properties  consist  of  offices  and water  systems  to
         accomplish the production,  storage,  purification  and distribution of
         water.  These properties are located in or near our Geographic  Service
         Areas  listed  above  under  section  Item  1.c.  entitled   "Narrative
         Description  of  the  Business."  Our  general  office,   which  houses
         accounting,   engineering,   information   systems,   human  resources,
         purchasing,  regulatory,  water quality and executive staffs is located
         in  San  Jose,  California.  All  properties  are  maintained  in  good
         operating condition.

         The  real  properties  that  we  own  are  held  in fee  simple  title.
         Properties  owned by Cal Water are  subject to the  indenture  securing
         first  mortgage  bonds of which $84.7 million  remained  outstanding at
         December 31, 2002.  Washington  Water has long-term bank loans totaling
         $3.5 million that are secured  primarily by utility  plant.  New Mexico
         Water has  outstanding  bank  loans  totaling  $2.4  million  which are
         secured by utility plant.

         We own 623 wells and operate ten leased  wells.  There were 376 storage
         tanks with a capacity of 246 million gallons and two reservoirs located
         in the Bear Gulch and Oroville districts with a capacity of 220 million
         gallons.  There are 5,200 miles of supply and distribution mains in the
         various systems.

         In the leased City of  Hawthorne  system or in systems  that we operate
         under contract for  municipalities or private  companies,  title to the
         various  properties is held  exclusively by the municipality or private
         company.

Item 3. Legal Proceedings.

         In 1995,  the  State of  California's  Department  of Toxic  Substances
         Control (DTSC) named the Company as a potential  responsible  party for
         cleanup of a toxic  contamination  plume in the Chico groundwater.  The
         toxic spill occurred when cleaning solvents, which were discharged into
         the  city's  sewer  system  by  local  dry  cleaners,  leaked  into the
         underground  water supply due to breaks in the city's sewer pipes.  The
         DTSC  contends  that  the  Company's   responsibility  stems  from  our
         operation  of  wells  in  the  surrounding  vicinity  that  caused  the
         contamination  plume to spread.  While the Company intends to cooperate
         with  the  cleanup  effort,  it  denies  any   responsibility  for  the
         contamination or the resulting cleanup and intends to vigorously resist
         any action that may be brought  against it. The Company has  negotiated
         with DTSC regarding dismissal of the Company from the claim in exchange

                                      -18-


         for the  Company's  cooperation  in the  cleanup  effort.  However,  no
         agreement was reached with DTSC regarding dismissal of the Company from
         the DTSC  action.  In December  2002,  the Company was named along with
         other defendants in a two lawsuits filed by DTSC for the cleanup of the
         plume.  The suits assert that the  defendants are jointly and severally
         liable for the estimated  cleanup costs of $8.69  million.  The Company
         believes that it has insurance coverage for these claims and that if it
         were  ultimately  held  responsible for a portion of the cleanup costs,
         there would not be a material adverse effect on the Company's financial
         position or results of operations.

         In December 2001, the Company and several other  defendants were served
         with a lawsuit by the estate and immediate family members of a deceased
         employee  of  a  pipeline  construction  contractor.  The  contractor's
         employee had worked on various Company projects over a number of years.
         The  plaintiffs  allege  that the  Company  and  other  defendants  are
         responsible  for an  asbestos-related  disease  that is claimed to have
         caused the death of the  contractor's  employee.  The  complaint  seeks
         damages in excess of  $50,000,  in  addition  to  unspecified  punitive
         damages.  The Company denies  responsibility in the case and intends to
         vigorously  defend  itself.  Pursuant to an indemnity  provision in our
         contracts  between the contractor  and the Company,  the contractor has
         accepted liability for the claim against the Company and is reimbursing
         the Company for its defense costs.

         In July 2002,  the  Company  was served  with a lawsuit in state  court
         naming it as one of  several  defendants  for  damages  alleged to have
         resulted from waste oil contamination in the Company's  drinking water.
         The suit did not specify a dollar amount.  The Company does not believe
         that the complaint alleges any facts under which it may be held liable.
         The Company has filed a motion to dismiss the suit on various  grounds.
         The Court has not ruled on the Company's motion. The Company intends to
         vigorously  defend the suit. In 2000, the same plaintiff in this action
         brought a suit  against  the  Company  in federal  court  with  similar
         allegations  concerning  drinking  water  contamination.  That suit was
         dismissed,  however, the Court did not bar the plaintiff from filing an
         amended complaint.  The Company's insurance carrier is paying for legal
         defense costs and the Company  believes that its insurance  policy will
         cover all costs related to this matter.

         The Company is required to report each water system  acquisition to the
         CPUC.  In  February  2003,  the CPUC`s  Office of  Ratepayer  Advocates
         recommended  that the  Company  be fined up to  $9,600,000  and  refund
         $470,000 in revenue for failing to report two  acquisitions as required
         by the CPUC's  rules.  One  acquisition  was completed on June 25, 1997
         prior to adoption of the reporting  requirement  by the CPUC; the other
         was  inadvertently  not reported.  The Company  purchased the two water
         systems,  which serve 283 customers,  for approximately  $140,000.  The
         staff's recommendation does not challenge the level of service provided
         or amounts  charged  for water  service to the  customers;  it is based
         solely on the fact that the Company  failed to report the  acquisitions
         to the CPUC.  The  Company  is  preparing  our  response.  The  Company
         believes that the Office of Ratepayer Advocates'  recommended penalties
         will be  substantially  reduced when this matter is  considered  by the
         full CPUC.

         Periodically we are involved in other proceedings or litigation arising
         in the ordinary course of business. We do not believe that the ultimate
         resolution  of these  matters  will  materially  affect  our  financial
         position, results of operations or cash flows.

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

         No matters were  submitted to a vote of security  holders in the fourth
         quarter of 2002.

                                      -19-


Executive Officers of the Registrant



Name                        Positions and Offices with California Water Service Group                Age
- ----                        ---------------------------------------------------------                ---
                                                                                               
Robert W. Foy               Chairman of the Board since January 1, 1996.  A director since           66
(1)                         1977. Formerly President and Chief Executive Officer of Pacific
                            Storage Company, a diversified transportation and
                            warehousing company serving Stockton, Modesto,
                            Sacramento, San Jose, Vallejo, and Merced
                            California, where he had been employed for 32 years.

Peter C. Nelson             President and Chief Executive Officer since February 1, 1996.            55
(2)                         Formerly Vice President, Division Operations (1994-1995) and
                            Region Vice President (1989-1994), Pacific Gas &
                            Electric Company, a gas and electric public utility.

Richard D. Nye              Vice President, Chief Financial Officer and Treasurer since              48
(1)                         March 2003. Formerly Acting Chief Financial Officer (2001 - 2002)
                            and Vice President of Finance and Administration (1998 - 2002) of
                            Cornerstone Propane Partners, L.P., a propane distribution company,
                            Previosly served in various finance management positions with
                            Frito-Lay, Inc., a snack food company (1989 to 1998).

Paul G. Ekstrom             Corporate Secretary since August 1996; Operations                        50
(3)                         Coordinator, 1993 to 1996; District Manager, Livermore,
                            1988 to 1993; previously served in various field
                            management positions since 1979; an employee since
                            1972.

Calvin L. Breed             Controller, Assistant Secretary and Assistant Treasurer since            47
(4)                         November 1994; previously Treasurer of TCI International, Inc.;
                            from 1980 to 1983, a certified public accountant with Arthur
                            Andersen & Co., certified public accountants.


(1)      holds the same position with  California  Water  Service  Company,  New
         Mexico Water Service Company,  Washington Water Service Company and CWS
         Utility Services

(2)      holds the same position with  California  Water Service Company and CWS
         Utility  Services;  Chief Executive Officer of New Mexico Water Service
         Company and Washington Water Service Company

(3)      Vice President, Customer Service with California Water Service Company,
         and Corporate Secretary of California Water Service Company, New Mexico
         Water Service Company, Washington Water Service Company and CWS Utility
         Services

(4)      holds the same position with California Water Service Company



Name                        Positions and Offices with California Water Service Company              Age
- ----                        -----------------------------------------------------------              ---
                                                                                               
Francis S. Ferraro          Vice President, Regulatory Matters and Corporate Development              53
(1)                         since May 2001; Vice President, Regulatory Matters, August 1989
                            to May 2001. Employed by the California Public
                            Utilities Commission for 16 years, including 1985
                            through 1989 as an administrative law judge.


                                      -20-



                                                                                               
Robert R. Guzzetta          Vice President, Engineering and Water Quality since August 1996;          49
(2)                         Chief Engineer, 1990 to 1996; Assistant Chief Engineer, 1988 to
                            1990; various engineering department positions since 1977.

Christine L. McFarlane      Vice President, Human Resources since August 1996; Director               56
                            of Human Resources, 1991 to 1996; Assistant Director of
                            Personnel, 1989 to 1991; an employee since 1969.

Dan L. Stockton             Vice President, Information Systems since April 2001;                     58
                            from 1991 to 2001 he served as Chief Operating Officer of
                            Great Oaks Water Company, ( years).

Raymond H. Taylor           Vice President, Operations since April 1995; Vice President and           57
                            Director of Water Quality, 1990 to 1995; Director of Water Quality,
                            1986 to 1990; an employee since 1982; prior to 1982 an employee of
                            the United States Environmental Protection Agency.


(1)      Also, Vice President,  Corporate Development with CWS Utility Services,
         and Vice  President,  Regulatory  Matters with New Mexico Water Service
         Company.

(2)      Also, Vice President, Engineering with CWS Utility Services.



Name                        Positions and Offices with Washington Water Service Company Age
- ----                        ---------------------------------------------------------------
                                                                                               
Michael P. Ireland          President since December 1999; previously President of Harbor Water       49
                            Company, Gig Harbor, Washington from 1985 to 1999.


                            Positions and Offices with New Mexico Water Service Company               59
                            -----------------------------------------------------------
                                                                                               
Robert                      J. Davey President since July 2002; also President
                            and Chief Executive Officer of Valley Improvement
                            Association, a nonprofit landowners association,
                            1985 to Present. He was President and Treasurer of
                            Rio Grande Utility Corporation, a subsidiary of
                            Valley Improvement Association, 1988 to Present.


No  officer  or  director  has any family  relationship  to any other  executive
officer or director.  No executive  officer is appointed for any set term. There
are no agreements or understandings  between any executive officer and any other
person pursuant to which he was selected as an executive officer.

                                      -21-


                                     PART II

Item 5.  Market for Registrant's Common Equity and Related Matters

         The  information  required  by this item is  contained  in the  section
         captioned  "Quarterly  Financial Data" on page 55 of the Company's 2002
         Annual Report and is incorporated herein by reference.

Item 6.  Selected Financial Data.

         The  information  required  by this item is  contained  in the  section
         captioned  "Ten-Year  Financial  Review"  on  pages  18  and  19 of the
         Company's 2002 Annual Report and is incorporated herein by reference.

Item 7.  Management's Discussion and Analysis of Financial Condition and Results
         of Operations.

         The  information  required  by this item is  contained  in the  section
         captioned "Management's  Discussion and Analysis of Financial Condition
         and  Results of  Operations,"  on pages 20 through 35 of the  Company's
         2002 Annual Report and is incorporated herein by reference.

Item 7A  Quantitative and Qualitative Disclosures About Market Risk

         The  information  required  by this item is  contained  in the  section
         captioned  "Financial  Risk  Management"  on  pages  33  and  34 of the
         Company's 2002 Annual Report and is incorporated herein by reference.

Item 8.  Financial Statements and Supplementary Data.

         The  information  required by this item is  contained  in the  sections
         captioned  "Consolidated  Balance  Sheet",  "Consolidated  Statement of
         Income",  "Consolidated  Statement of Common  Stockholders'  Equity and
         Comprehensive Income", Consolidated Statement of Cash Flows", "Notes to
         Consolidated  Financial Statements" and "Independent  Auditors' Report"
         on pages 36  through  55 of the  Company's  2002  Annual  Report and is
         incorporated   herein  by   reference.   The  2002  Annual   Report  to
         Stockholders is included with this report as Exhibit 13.1.

Item 9.  Changes  in  and  Disagreements  with  Accountants  on  Accounting  and
         Financial Disclosure.

         None.

                                      -22-


                                    PART III

Item 10. Directors and Executive Officers of the Registrant.

         The information required by this item as to directors of the Company is
         contained in the section captioned "Board Structure" and is included on
         page 8 of the  2003  Proxy  Statement,  and  in the  section  captioned
         Proposal No. 1 - Election of  Directors"  on pages 10 through 12 of the
         2003  Proxy  Statement  and  is   incorporated   herein  by  reference.
         Information  regarding executive officers of the Company is included in
         a  separate  item  captioned  "Executive  Officers  of the  Registrant"
         contained in Part I of this report.

Item 11. Executive Compensation.

         The information required by this item as to directors of the Company is
         included under the caption "Director Compensation Arrangements" on page
         9 of the 2003 Proxy Statement and is incorporated  herein by reference.
         The  information  required by this item as to compensation of executive
         officers,  including officers who are directors,  is included under the
         captions  "Executive  Compensation"  and  "Report  of the  Compensation
         Committee of the Board of Directors on Executive  Compensation" on page
         15 through 21 of the 2003 Proxy Statement and is incorporated herein by
         reference.

Item 12.  Security  Ownership of Certain  Beneficial  Owners and  Management and
          Related Stockholder Matters.

         The  information  required  by this item is  contained  in the  section
         captioned "Stock Ownership of Management and Certain Beneficial Owners"
         on pages  13 and 14 of the 2003  Proxy  Statement  and is  incorporated
         herein by reference.

Item 13. Certain Relationships and Related Transactions.

         None.

Item 14. Controls and Procedures

  (a)    Evaluation of Disclosure Controls and Procedures

         Under the  supervision  of the Company's  chief  executive  officer and
         chief financial  officer,  and with the  participation  of other senior
         management, the Company conducted an evaluation of the effectiveness of
         the design and operation of the  disclosure  controls and procedures as
         defined by Rules 13a-14(c) and 15d-14(c) under the Securities  Exchange
         Act of 1934. The evaluation was completed  within 90 days of the filing
         of this report (Evaluation  Date).  Based on the evaluation,  the chief
         executive  officer and chief financial officer concluded that as of the
         Evaluation  Date the disclosure  controls and procedures  were adequate
         and  effective,  and  that  the  material  information  required  to be
         included  in this  report,  including  information  from the  Company's
         consolidated subsidiaries, was properly recorded, processed, summarized
         and  reported,  and was made known to the chief  executive  officer and
         chief  financial  officer  by others  within  the  Company  in a timely
         manner,  particularly during the period when this annual report on Form
         10-K was being prepared.

                                      -23-


  (b)    Change in Internal Controls

         In addition,  there were no significant changes in internal controls or
         in  other  factors  that  could  significantly  affect  these  controls
         subsequent  to  the  Evaluation   Date.  We  have  not  identified  any
         significant  or  material  weaknesses  in our  internal  controls,  and
         therefore there were no corrective actions taken.

                                      -24-


                                     PART IV

Item 15. Exhibits, Financial Statement Schedules, and Reports on Form 8-K.

(a)      As part of this Form 10-K, the following documents are being filed:

         1.       Financial Statements:

                  Consolidated Balance Sheet as of December 31, 2002 and 2001.

                  Consolidated  Statement of Income for the years ended December
                  31, 2002, 2001 and 2000.

                  Consolidated  Statement  of Common  Stockholders'  Equity  and
                  Comprehensive  Income for the years ended  December  31, 2002,
                  2001 and 2000.

                  Consolidated  Statement  of Cash  Flows  for the  years  ended
                  December 31, 2002, 2001 and 2000.

                  Notes to Consolidated Financial Statements, December 31, 2002,
                  2001 and 2000.

                  Independent Auditors' Report.

                  The above  financial  statements  are  contained  in  sections
                  bearing  the  same  captions  on pages  36  through  55 of the
                  Company's  2002 Annual Report to  stockholders  which is filed
                  with this Form 10-K and  incorporated  by reference.  Refer to
                  Exhibit 13.1 of this Form 10-K.

         2.       Financial Statement Schedules: Independent Auditors' Report.

                  Schedule II - Valuation and Qualifying  Accounts for the years
                  ending December 31, 2002, 2001 and 2000.

                  All other schedules are omitted as the required information is
                  inapplicable  or the information is presented in the financial
                  statements or related notes to the financial statements.

         3.       Exhibits required to be filed by Item 601 of Regulation S-K:

                  The Exhibit Index on page 32 of this Form 10-K is incorporated
                  herein by reference.

                  The  exhibits  filed as part of this Form  10-K are  attached,
                  unless otherwise indicated. The exhibits listed in the Exhibit
                  Index that are not filed  with this Form 10-K were  previously
                  filed with the Securities and Exchange Commission as indicated
                  and are hereby incorporated by reference.

(b)      Reports on Form 8-K.

                  No reports  were filed on Form 8-K  during the  quarter  ended
                  December 31, 2002.

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

                  Refer to item (a) 3 above and the Exhibit  Index on page 32 of
                  this Form 10-K.

(d)      Additional Financial Statement Schedules.

                  No filings are required under this item.

                                      -25-


                          Independent Auditors' Report

The Board of Directors
California Water Service Group:

Under date of January 29,  2003,  except as to Note 16,  which is as of February
28, 2003, we reported on the  consolidated  balance  sheet of  California  Water
Service Group and subsidiaries as of December 31, 2002 and 2001, and the related
consolidated statements of income, common stockholders' equity and comprehensive
income,  and cash  flows for each of the years in the  three-year  period  ended
December 31, 2002, as contained in the 2002 annual report to stockholders. These
consolidated  financial  statements and our report thereon are  incorporated  by
reference  in the annual  report on Form 10-K for the year 2002.  In  connection
with our audits of the aforementioned consolidated financial statements, we also
audited the related  consolidated  financial statement schedule as listed in the
index appearing under Item 15(a)(2).  This financial  statement  schedule is the
responsibility of the Company's management.  Our responsibility is to express an
opinion on this financial statement schedule based on our audits.

In our opinion,  such financial statement schedule,  when considered in relation
to the  basic  consolidated  financial  statements  taken as a  whole,  presents
fairly, in all material respects, the information set forth therein.


                                            /s/ KPMG LLP

Mountain View, California
January 29, 2003, except as to Note 16, which is as of February 28, 2003

                                      -26-


                                                                     Schedule II
                 CALIFORNIA WATER SERVICE GROUP AND SUBSIDIARIES
                        Valuation and Qualifying Accounts



                                                                                     Additions
                                                                               ----------------------
                                                                 Balance at   Charged to    Charged to                      Balance
                                                                 Beginning    costs and       other                         at end
               Description                                       Of period     expenses      accounts       Deductions     of period
               -----------                                       ---------     --------      --------       ----------     ---------
                                                                                                             
For the year Ended December 31, 2002
          Reserves deducted from applicable balance
            sheet assets:
               Allowance for doubtful accounts                    $224,000     $480,000     $ 82,822(3)     $440,521(1)     $180,657
               Allowance for obsolete materials and supplies        75,008       48,000           --          32,724(2)       90,282
                                                                  ========     ========     ========        ========        ========

For the year Ended December 31, 2001
          Reserves deducted from applicable balance
            sheet assets:
               Allowance for doubtful accounts                    $180,658     $648,000     $169,471(3)     $774,128(1)     $224,000
               Allowance for obsolete materials and supplies       126,608       48,000       75,701         175,302(2)       75,008
                                                                  ========     ========     ========        ========        ========

For the year Ended December 31, 2000
          Reserves deducted from applicable balance
            sheet assets:
               Allowance for doubtful accounts                    $419,847     $598,608     $ 91,579(3)     $929,376(1)     $180,658
               Allowance for obsolete materials and supplies       100,297       68,939           --          42,628(2)      126,608
                                                                  ========     ========     ========        ========        ========


Notes:

(1)      Accounts written off during the year.

(2)      Expenditures and other charges made during the year

(3)      Recovery of amounts previously charged to reserve

                                      -27-


                                   SIGNATURES

Pursuant to the  requirements of Section 13 or 15(d) 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


Date: March 24, 2003                       By /s/ Peter C. Nelson
                                           PETER C. NELSON,
                                           President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report
has been signed below by the following persons on behalf of the Registrant and
in the capacities and on the dates indicated:

Date: February 26, 2003                    /s/ Robert W. Foy
                                           ROBERT W. FOY
                                           Chairman, Board of Directors

Date: February 26, 2003                    /s/ Douglas M. Brown
                                           DOUGLAS M. BROWN
                                           Member, Board of Directors

Date: February 26, 2003                    /s/ Edward D. Harris, Jr.
                                           EDWARD D. HARRIS, JR., M.D.
                                           Member, Board of Directors

Date: February 26, 2003                    /s/ Richard P. Magnuson
                                           RICHARD P. MAGNUSON
                                           Member, Board of Directors

Date: February 26, 2003                    /s/ Linda R. Meier
                                           LINDA R. MEIER
                                           Member, Board of Directors

Date: February 26, 2003                    /s/ Peter C. Nelson
                                           PETER C. NELSON
                                           President and Chief Executive
                                           Officer, Principal Executive Officer
                                           Member, Board of Directors

Date: February 26, 2003                    /s/ Langdon W. Owen
                                           LANGDON W. OWEN
                                           Member, Board of Directors

Date: February 26, 2003                    /s/ George A. Vera
                                           GEORGE A. VERA
                                           Member, Board of Directors

                                      -28-


Date: March 24, 2003                        /s/ Richard D. Nye
                                            RICHARD D. NYE
                                            Vice President, Chief Financial
                                            Officer and Treasurer;
                                            Principal Financial Officer

Date: March 24, 2003                        /s/ Calvin L. Breed
                                            CALVIN L. BREED
                                            Controller, Assistant Secretary and
                                            Assistant Treasurer;
                                            Principal Accounting Officer

                                      -29-


                                 CERTIFICATIONS

I, Peter Nelson,  President  and Chief  Executive  Officer of  California  Water
Service Group, certify that:

      1.    I have reviewed this annual report on Form 10-K of California  Water
            Service Group;

      2.    Based on my  knowledge,  this  annual  report  does not  contain any
            untrue statement of a material fact or omit to state a material fact
            necessary to make the statements made, in light of the circumstances
            under which such statement were made, not misleading with respect to
            the period covered by this annual report;

      3.    Based on my knowledge, the financial statements, and other financial
            information  included in this annual  report,  fairly present in all
            material respects the financial condition, results of operations and
            cash flows of the  registrant as of, and for, the periods  presented
            in this annual report;

      4.    The registrant's  other certifying officer and I are responsible for
            establishing and maintaining  disclosure controls and procedures (as
            defined in Exchange Act Rules 13a-14 and 15d-14) for the  registrant
            and have:

            a.    Designed  such  disclosure  controls and  procedures to ensure
                  that  material   information   relating  to  the   registrant,
                  including its consolidated  subsidiaries,  is made known to us
                  by others  within  those  entities,  particularly  during  the
                  period in which this annual report is being prepared;

            b.    Evaluated the  effectiveness  of the  registrant's  disclosure
                  controls and  procedures  as of a date within 90 days prior to
                  the filing date of this annual report (the "Evaluation Date");
                  and

            c.    Presented  in this  annual  report our  conclusions  about the
                  effectiveness of the disclosure  controls and procedures based
                  on our evaluation as of the Evaluation Date;

      5.    The  registrant's  other  certifying  officer and I have  disclosed,
            based on our most recent  evaluation,  to the registrant's  auditors
            and the audit  committee  of  registrant's  board of  directors  (or
            persons performing the equivalent functions):

            a.    All  significant  deficiencies  in the design or  operation of
                  internal   controls   which   could   adversely   affect   the
                  registrant's ability to record, process,  summarize and report
                  financial  data  and  have  identified  for  the  registrant's
                  auditors any material weaknesses in internal controls; and

            b.    Any fraud,  whether or not material,  that involves management
                  or  other  employees  who  have  a  significant  role  in  the
                  registrant's internal controls; and

      6.    The registrant's  other  certifying  officer and I have indicated in
            this  annual  report  whether  there  were  significant  changes  in
            internal  controls  or in other  factors  that  could  significantly
            affect internal  controls  subsequent to the date of our most recent
            evaluation,   including  any  corrective   actions  with  regard  to
            significant deficiencies and material weaknesses.


Date:  March 24, 2003                      By: /s/ Peter C. Nelson
                                           PETER C. NELSON
                                           President and Chief Executive Officer
                                           California Water Service Group

                                      -30-


                                 CERTIFICATIONS

I, Richard D. Nye, Chief  Financial  Officer of California  Water Service Group,
certify that:

      1.    I have reviewed this annual report on Form 10-K of California  Water
            Service Group;

      2.    Based on my  knowledge,  this  annual  report  does not  contain any
            untrue statement of a material fact or omit to state a material fact
            necessary to make the statements made, in light of the circumstances
            under which such statement were made, not misleading with respect to
            the period covered by this annual report;

      3.    Based on my knowledge, the financial statements, and other financial
            information  included in this annual  report,  fairly present in all
            material respects the financial condition, results of operations and
            cash flows of the  registrant as of, and for, the periods  presented
            in this annual report;

      4.    The registrant's  other certifying officer and I are responsible for
            establishing and maintaining  disclosure controls and procedures (as
            defined in Exchange Act Rules 13a-14 and 15d-14) for the  registrant
            and have:

            a)    Designed  such  disclosure  controls and  procedures to ensure
                  that  material   information   relating  to  the   registrant,
                  including its consolidated  subsidiaries,  is made known to us
                  by others  within  those  entities,  particularly  during  the
                  period in which this annual report is being prepared;

            b)    Evaluated the  effectiveness  of the  registrant's  disclosure
                  controls and  procedures  as of a date within 90 days prior to
                  the filing date of this annual report (the "Evaluation Date");
                  and

            c)    Presented  in this  annual  report our  conclusions  about the
                  effectiveness of the disclosure  controls and procedures based
                  on our evaluation as of the Evaluation Date;

      5.    The  registrant's  other  certifying  officer and I have  disclosed,
            based on our most recent  evaluation,  to the registrant's  auditors
            and the audit  committee  of  registrant's  board of  directors  (or
            persons performing the equivalent functions):

            a)    All  significant  deficiencies  in the design or  operation of
                  internal   controls   which   could   adversely   affect   the
                  registrant's ability to record, process,  summarize and report
                  financial  data  and  have  identified  for  the  registrant's
                  auditors any material weaknesses in internal controls; and

            b)    Any fraud,  whether or not material,  that involves management
                  or  other  employees  who  have  a  significant  role  in  the
                  registrant's internal controls; and

     6.     The registrant's  other  certifying  officer and I have indicated in
            this  annual  report  whether  there  were  significant  changes  in
            internal  controls  or in other  factors  that  could  significantly
            affect internal  controls  subsequent to the date of our most recent
            evaluation,   including  any  corrective   actions  with  regard  to
            significant deficiencies and material weaknesses.


Date:  March 24, 2003
                                            By: /s/ Richard D. Nye
                                            RICHARD D. NYE
                                            Chief Financial Officer
                                            California Water Service Group

                                      -31-


                 (all page references will be updated at filing)

                                  EXHIBIT INDEX
                                                                      Sequential
Exhibit                                                             Page Numbers
Number                                                            in this Report
- ------                                                            --------------

Unless  filed with this Form 10-K,  the  documents  listed are  incorporated  by
reference.

2.       Plan of Acquisition, Reorganization, Liquidation or
         Succession:

         2.1      Agreement   of  Merger   by  and   between                  32
                  California   Water   Service   Group   and
                  California  Water Service Company creating
                  a  holding  company  corporate   structure
                  (Filed as Exhibit A of the 1999 California
                  Water Service Company Proxy Statement)

         2.2      Agreement and Plan of Reorganization among                  32
                  California Water Service Group, California
                  Water   Service   Company  and   Dominguez
                  Services  Corporation  dated  November 13,
                  1998, and Amendment No. 1 to the Agreement
                  and Plan of Reorganization (Appendix A and
                  Appendix B, respectively, to Amendment No.
                  1 to Form S-4 filed April 2, 1999)

3.       Articles of Incorporation and By-laws:

         3.1      Certificate of Incorporation of California                  32
                  Water Service Group (Filed as Exhibit B of
                  the 1999 California  Water Service Company
                  Proxy Statement)

         3.2      Restated   By-laws  of  California   Water                  32
                  Service  Group as amended  on January  26,
                  2000   (Exhibit  E-2  to  Form  8-K  filed
                  February 3, 2000)

4.       Instruments Defining the Rights of Security Holders
         of  California  Water  Service  Company,  including
         Indentures:

         4.1      Certificate    of     Determination     of                  32
                  Preferences for Group's Series C Preferred
                  Stock (Exhibit 3.2 to Form 10-K for fiscal
                  year 1987)

         4.2      Shareholder   Rights  Plan;  an  agreement                  32
                  between California Water Service Group and
                  BankBoston,   N.A.,  rights  agent,  dated
                  January  28,  1998  (Exhibit 1 to Form 8-A
                  and  Exhibit 1 to Form 8-K dated  February
                  13, 1998)

         4.3      Certificate    of     Determination     of                  32
                  Preferences for Group's Series D Preferred
                  Stock (Exhibit A to the Shareholder Rights
                  Plan,  an  agreement  between   California
                  Water Service Group and BankBoston,  N.A.,
                  rights agent, dated January 28, 1998 filed
                  as Exhibit 1 to Form 8-A and  Exhibit 1 to
                  Form 8-K dated February 13, 1998)

                            -32-


         4.4      Certificate  of  Determination   regarding                  33
                  Series D Participating  Preferred  Shares.
                  These   shares   are   relative   to   the
                  Shareholder   Rights  Plan  and  would  be
                  issued if the rights plan were  triggered.
                  This is a revised filing at the California
                  Secretary of State's  request in a revised
                  form  (Exhibit  10.19  to Form 10Q for the
                  quarter ending September 30, 1998)

         4.5      Thirty-fourth Supplemental Indenture dated                  33
                  as of  November  1, 1990,  covering  First
                  Mortgage 9.86% Bonds,  Series CC. (Exhibit
                  4 to Form 10-K for fiscal year 1990)

         4.6      Thirty-sixth  Supplemental Indenture dated                  33
                  as of May 1, 1993, covering First Mortgage
                  7.90%  Bonds  Series EE (Exhibit 4 to Form
                  10-Q dated June 30, 1993)

         4.7      Thirty-seventh    Supplemental   Indenture                  33
                  dated as of  September  1, 1993,  covering
                  First  Mortgage  6.95%  Bonds,  Series  FF
                  (Exhibit  4 to Form 10-Q  dated  September
                  30, 1993)

         4.8      Thirty-eighth Supplemental Indenture dated                  33
                  as of October  15,  1993,  covering  First
                  Mortgage 6.98% Bonds, Series GG (Exhibit 4
                  to Form 10-K for fiscal year 1994)

         4.9      Note  Agreement  dated  August  15,  1995,                  33
                  pertaining  to  issuance  of  $20,000,000,
                  7.28% Series A Unsecured Senior Notes, due
                  November  1, 2025  (Exhibit 4 to Form 10-Q
                  dated September 30, 1995)

         4.10     Note   Agreement   dated  March  1,  1999,                  33
                  pertaining  to  issuance  of  $20,000,000,
                  6.77% Series B Unsecured Senior Notes, due
                  November 1, 2028 (Exhibit 4.1 to Form 10-K
                  dated December 31, 1999)

         4.11     First  Supplement dated October 1, 2000 to                  33
                  Note Agreement of March 1, 1999 pertaining
                  to issuance of $20,000,000, 8.15% Series C
                  Unsecured  Senior  Notes,  due November 1,
                  2030  (Exhibit  4.10  to Form  10-K  dated
                  December 31, 2000)

         4.12     Second  Supplement dated September 1, 2001                  33
                  to  Note   Agreement   of  March  1,  1999
                  pertaining  to  issuance  of  $20,000,000,
                  7.13% Series D Unsecured Senior Notes, due
                  November 1, 2031 (Exhibit 4.1 to Form 10-Q
                  dated September 30, 2001)

         4.13     Third Supplement dated May 1, 2002 to Note                  33
                  Agreement of March 1, 1999,  pertaining to
                  issuance of  $20,000,000,  7.11%  Series E
                  Unsecured  Senior  Notes,  due November 1,
                  2032  (Exhibit 4.1 to Form 10-Q dated June
                  30, 2002)

                            -33-


         4.14     Fourth Supplement dated August 15, 2002 to                  38
                  Note  Agreement  of  March 1,  1999,  Note
                  Agreement    dated    August   15,   2002,
                  pertaining  to  issuance  of  $20,000,000,
                  5.90% Series F Unsecured Senior Notes, due
                  November  1,  2017  (Exhibit  4.14 to Form
                  10-K dated December 31, 2002)

         4.15     Fifth Supplement dated November 1, 2002 to                  68
                  Note   Agreement   of   March   1,   1999,
                  pertaining  to  issuance  of  $20,000,000,
                  5.29% Series G Unsecured Senior Notes, due
                  November  1,  2022  (Exhibit  4.15 to Form
                  10-K dated December 31, 2002)

         4.16     Sixth Supplement dated December 1, 2002 to                 104
                  Note Agreement of March 1, 1999 pertaining
                  to issuance of $20,000,000, 5.29% Series H
                  Unsecured  Senior  Notes,  due December 1,
                  2022   (Exhibit  16  to  Form  10-K  dated
                  December 31, 2002)

         4.17     Ninth  Supplement  dated February 15, 2003                 136
                  to  Note   Agreement   of  March  1,  1999
                  pertaining  to  issuance  of  $10,000,000,
                  4.58% Series K Unsecured Senior Notes, due
                  June 30, 2010  (Exhibit  4.17 to Form 10-K
                  dated December 31, 2002)

         4.18     Tenth  Supplement  dated February 15, 2003                 162
                  to  Note   Agreement   of  March  1,  1999
                  pertaining  to  issuance  of  $10,000,000,
                  5.48% Series L Unsecured Senior Notes, due
                  March 18, 2018  (Exhibit 4.18 to Form 10-K
                  dated December 31, 2002)

         4.19     Thirteenth  Supplemental  Trust  Indenture                  34
                  whereby  California  Water Service Company
                  became the  successor to  Dominguez  Water
                  Corporation    in   the   original   trust
                  indenture for Dominguez Water  Corporation
                  dated August 1, 1954 (Exhibit 4.11 to Form
                  10-K dated December 31, 2000)

         4.20     Eleventh   Supplemental   Trust  Indenture                  34
                  dated  as of  December  8,  1992  covering
                  First  Mortgage  8.86%  Bonds,   Series  J
                  (Exhibit  10.2 to Form 10-K as of December
                  31, 1997 and filed by  Dominguez  Services
                  Corporation on March 31, 1998)

         4.21     Twelfth Supplemental Indenture dated as of                  34
                  December 1, 1997,  covering First Mortgage
                  6.94% Bonds,  Series K due January 1, 2023
                  (Exhibit 10.2 to Form 10-K dated  December
                  31, 1997 and filed by  Dominguez  Services
                  Corporation on March 31, 1998)

10.      Material Contracts.

         10.1     Water  Supply  Contract  between Cal Water                  34
                  and  County  of  Butte   relating  to  Cal
                  Water's  Oroville  District;  Water Supply
                  Contract  between  Cal  Water and the Kern
                  County  Water   Agency   relating  to  Cal
                  Water's Bakersfield District; Water Supply
                  Contract  between  Cal Water and  Stockton
                  East  Water   District   relating  to  Cal
                  Water's Stockton District. (Exhibits 5(g),
                  5(h), 5(i), 5(j),  Registration  Statement
                  No.    2-53678,    which    exhibits   are
                  incorporated by reference to Form 10-K for
                  fiscal year 1974).

                            -34-


         10.2     Settlement   Agreement  and  Master  Water                  35
                  Sales Contract between the City and County
                  of  San  Francisco  and  Certain  Suburban
                  Purchasers    dated    August   8,   1984;
                  Supplement  to  Settlement  Agreement  and
                  Master Water Sales Contract,  dated August
                  8, 1984; Water Supply Contract between Cal
                  Water  and  the  City  and  County  of San
                  Francisco  relating  to Cal  Water's  Bear
                  Gulch District dated August 8, 1984; Water
                  Supply Contract  between Cal Water and the
                  City and County of San Francisco  relating
                  to the Cal  Water's  San  Carlos  District
                  dated   August  8,  1984;   Water   Supply
                  Contract  between  Cal  Water and the City
                  and County of San  Francisco  relating  to
                  Cal  Water's  San  Mateo   District  dated
                  August  8,  1984;  Water  Supply  Contract
                  between  Cal Water and the City and County
                  of San  Francisco  relating to Cal Water's
                  South San Francisco  District dated August
                  8,  1984.  (Exhibit  10.2 to Form l0-K for
                  fiscal year 1984).

         10.3     Water Supply  Contract  dated  January 27,                  35
                  1981,  between  Cal  Water  and the  Santa
                  Clara  Valley Water  District  relating to
                  Cal  Water's Los Altos  District  (Exhibit
                  10.3 to Form 10-K for fiscal year 1992)

         10.4     Amendments  No.  3, 6 and 7 and  Amendment                  35
                  dated  June  17,  1980,  to  Water  Supply
                  Contract  between Cal Water and the County
                  of Butte relating to Cal Water's  Oroville
                  District.  (Exhibit  10.5 to Form 10-K for
                  fiscal year 1992)

         10.5     Amendment  dated  May 31,  1977  to  Water                  35
                  Supply  Contract  between  Cal  Water  and
                  Stockton-East  Water District  relating to
                  Cal Water's  Stockton  District.  (Exhibit
                  10.6 to Form 10-K for fiscal year 1992)

         10.6     Second Amended  Contract  dated  September                  35
                  25,   1987  among   Stockton   East  Water
                  District,    California    Water   Service
                  Company, the City of Stockton, the Lincoln
                  Village  Maintenance  District,   and  the
                  Colonial  Heights   Maintenance   District
                  Providing  for the Sale of Treated  Water.
                  (Exhibit 10.7 to Form 10-K for fiscal year
                  1987).

         10.7     Water  Supply  Contract  dated  April  19,                  35
                  1927,  and  Supplemental  Agreement  dated
                  June  5,  1953,   between  Cal  Water  and
                  Pacific Gas and Electric  Company relating
                  to Cal Water's Oroville District. (Exhibit
                  10.9 to Form 10-K for fiscal year 1992)

         10.8     California  Water Service  Company Pension                  35
                  Plan  (Exhibit  10.10  to  Form  10-K  for
                  fiscal year 1992)

         10.9     California Water Service Company Employees                  35
                  Savings Plan.  (Exhibit 10.12 to Form 10-K
                  for fiscal year 1992)

         10.10    Agreement  between  the City of  Hawthorne                  35
                  and California  Water Service  Company for
                  the  15-year  lease  of the  City's  water
                  system.  (Exhibit 10.17 to Form 10-Q dated
                  March 31, 1996)

                            -35-


         10.11    Water Supply Agreement dated September 25,                  36
                  1996 between the City of  Bakersfield  and
                  California Water Service Company. (Exhibit
                  10.18 to Form  10-Q  dated  September  30,
                  1996)

         10.12    Water Supply  Contract  dated November 16,                  36
                  1994  between   California  Water  Service
                  Company and Alameda  County Flood  Control
                  and Water  Conservation  District relating
                  to Cal Water's Livermore District (Exhibit
                  10.15 to Form 10-K for 1994)

         10.13    Agreement of Merger dated March 6, 1997 by                  36
                  and   among   California   Water   Service
                  Company,    CWSG   Merger    Company   and
                  California Water Service Group.  (Filed as
                  Exhibit  A of the  1997  California  Water
                  Service    Company    Proxy     Statement/
                  Prospectus   which  was   incorporated  by
                  reference in the Form 10-K for 1997)

         10.14    Dividend  Reinvestment  and Stock Purchase                  36
                  Plan dated  February  17,  1998  (Filed on
                  Form S-3 dated February 17, 1998)

         10.15    California  Water Service Group  Directors                  36
                  Retirement  Plan  (Exhibit  10.18  to Form
                  10-K for fiscal year 1997) *

         10.16    $60,000,000   Business   Loan   Agreements                  36
                  between    Bank   of   America   as   lead
                  arranger/bank and California Water Service
                  Group,   and  CWS  Utility   Services  and
                  California Water Service Company,  and JCC
                  Homes  dated  August 1,  2001;  terminated
                  February  28, 2003  (Exhibit  10.1 to Form
                  10-Q dated September 30, 2001)

         10.17    $10,000,000    Business   Loan   Agreement                 189
                  between  Bank of  America  and  California
                  Water   Service   Group  and  CWS  Utility
                  Services  dated February 28, 2003 (Exhibit
                  10.17 to Form 10-K dated December 31, 2002

         10.18    $55,000,000    Business   Loan   Agreement                 206
                  between  Bank of  America  and  California
                  Water Service  Company dated  February 28,
                  2003  (Exhibit  10.18 to Form  10-K  dated
                  December 31, 2002

         10.19    Executive Severance Plan (Exhibit 10.24 to                  36
                  Form 10K for the fiscal year 1998) *

         10.20    California  Water Service Group  Long-Term                  36
                  Incentive Plan (filed as Appendix A of the
                  2000   California   Water   Service  Group
                  Proxy)*

         10.21    California  Water Service  Group  Deferred                  36
                  Compensation  Plan  effective  January  1,
                  2001;   this  plan   replaces  the  former
                  Directors   Deferred   Compensation   Plan
                  (Exhibit 10.22 to Form 10-K for 2000) *

         10.22    California     Water    Service    Company                  36
                  Supplemental   Executive  Retirement  Plan
                  (SERP)  effective  January 1,  2001;  this
                  plan  replaces a prior  plan,  see Exhibit
                  10.9  (Exhibit  10.23  to  Form  10-K  for
                  2000)*

                            -36-


         10.23    Amendment to the California  Water Service                 222
                  Company Supplemental  Executive Retirement
                  Plan  (SERP)  effective  January  1,  2003
                  granting 60%  retirement  benefit after 15
                  years of  service  (Exhibit  10.23 to Form
                  10-K for dated December 31, 2002)*

13.      Annual  Report to  Security  Holders,  Form 10-Q or
         Quarterly Report to Security Holders:

         13.1     2002 Annual  Report.  Certain  sections of                 223
                  the 2002 Annual Report to stockholders are
                  incorporated  by  reference  in this  10-K
                  filing  and  filed  with this Form 10-K as
                  Exhibit 13. This includes  those  sections
                  referred to in Part II, Item 5, Market for
                  Registrant's  Common  Equity  and  Related
                  Shareholder  Matters;  Part  II,  Item  6,
                  Selected  Financial Data; Part II, Item 7,
                  Management's  Discussion  and  Analysis of
                  Financial   Condition   and   Results   of
                  Operations; Part II, Item 7A, Quantitative
                  and Qualitative  Disclosures  About Market
                  Risk;  and  Part  II,  Item  8,  Financial
                  Statement and Supplementary Data.

21.      Subsidiaries of the Registrant                                      256

23.      Consents of Experts and Counsel.

         23.1     Consent of KPMG LLP                                        257

99.      Certification  Pursuant to 18 U.S.C.  Section 1350,
         as  adopted   pursuant   to  Section   906  of  the
         Sarbanes-Oxley Act of 2002                                          258

*      Management Contract or Compensatory Plan or Arrangement

                            -37-