Exhibit 99


[GRAPHIC OMITTED]                                               [OBJECT OMITTED]
                                  NEWS RELEASE
                         CALIFORNIA WATER SERVICE GROUP

             1720 North First Street
             San Jose, CA 95112-4598                              April 23, 2003
                                                           For Immediate Release

Contact:     Richard Nye    (408) 367-8216 (analysts)
             Shannon Dean (310) 257-1435 (media)

                 CAL WATER ANNOUNCES FIRST QUARTER 2003 RESULTS;
               BOARD DECLARES 234TH CONSECUTIVE QUARTERLY DIVIDEND

- --------------------------------------------------------------------------------

SAN JOSE, CA - California  Water  Service  Group (NYSE : CWT) today  announced a
loss of $768,000,  or ($0.05) per share, for the first quarter 2003, compared to
net income of $1.9 million and earnings per share of $0.12 in the first  quarter
of 2002.

         According to President  and Chief  Executive  Officer  Peter C. Nelson,
first quarter 2003 results were  impacted by a decline in customer  usage due to
weather and continued delays in receiving rate relief from the California Public
Utilities Commission (CPUC).

         "Sales and net income are  historically  low in the first quarter,  and
this year was much  wetter  than the prior year,  which  reduced our  customers'
water usage. But more  significantly,  we are still awaiting  decisions from the
CPUC that, had they been favorably acted on in a timely manner, would have added
revenue and net earnings to our first quarter results," Nelson said.

         The company is  anticipating  decisions  on its  requests to recover $6
million in purchased  water and  electricity  costs  incurred  prior to November
2001, and not yet billed to customers. The company is also awaiting decisions on
the 15 general rate cases filed in July 2001, which if favorably acted upon, are
expected to add at least  $12.8  million in annual  revenue.  The CPUC rate case
process calls for  decisions to be issued  within 10 months.  These filings have
now been outstanding for 21 months.

                                  Page 4 of 9


         In a potentially  favorable decision issued April 3, 2003, the CPUC set
an effective  date for the 15 general rate cases filed in 2001.  Once  decisions
are  made,  the  company  will be  allowed  to  recover  the new  rates as of an
effective date of April 3, 2003.

         In the second of three  filings  related to the  Bakersfield  Treatment
Plant,  the  company  received  authorization  in April  2003 to  recover  costs
incurred for  construction of that plant.  The two filings will add an estimated
$1.5 million to 2003 revenues. A third filing will be made in 2003, which may or
may  not  impact  2003   revenues,   depending  on  the  timing  and  amount  of
authorization received from the CPUC. The plant is expected to be operational in
the second quarter of 2003.

         The company  made  additional  rate case  filings in November  2002 and
January 2003 but cannot predict the amount or the timing of the CPUC decisions.

         "We  continue  to control  expenses  throughout  the  company  and have
delayed capital  expenditures that do not relate to water supply,  water quality
or compliance with  regulations.  We have a responsibility to provide a reliable
supply of  high-quality  water.  Necessary  costs must be  incurred to serve our
customers." Nelson said.

         Revenue for the quarter  decreased  0.6%,  or $301,000.  A $1.9 million
decrease in water sales to existing  customers was partially  offset by $845,000
in rate increases and $740,000 in sales to new customers.

         Total  operating  expenses   increased  5%,  or  $2.4  million.   Water
production  costs  increased from last year due to a $750,000  water  wholesaler
refund received in 2002. Maintenance expense increased because more repairs were
made to pumping equipment, pipelines, and other facilities. Depreciation expense
was  higher  due to  increases  in  2002  capital  expenditures  driven  by more
stringent water quality  standards.  Other operations expense increases included
wages  and  benefit  increases  that  were  effective  at the start of the year.
Contracts with unions were made in the 4th quarter of 2002 that included  salary
increases.  Benefit  increases are  attributable  to changes made to the pension
plan and increases in medical claim costs.

                                  Page 5 of 9


         At their  meeting  today,  Directors  declared  the  234th  consecutive
quarterly  dividend on common stock in the amount of $0.28125.  It is payable on
May 16, 2003, to stockholders of record on May 2, 2003. The regular  dividend on
Series C preferred stock was also declared.

         California  Water  Service  Group is the parent  company of  California
Water  Service  Company,  Washington  Water  Service  Company,  New Mexico Water
Service  Company and CWS Utility  Services.  Together  these  companies  provide
regulated  and  non-regulated  water  service  to over 2  million  people  in 98
California,  Washington and New Mexico communities.  Group's common stock trades
on the New York Stock Exchange under the symbol "CWT".

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

                                  Page 6 of 9


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.

               Additional   information   is   available  at  our  Web  site  at
               www.calwater.com. Attachments (2).

                                       ###


                                  Page 7 of 9

CALIFORNIA WATER SERVICE GROUP
CONDENSED CONSOLIDATED BALANCE SHEET
Unaudited
(In thousands, except per share data)                   March 31,   December 31,
                                                          2003          2002
ASSETS                                                    ----          ----
Utility plant:
         Utility plant                                 $1.024,914   $1,001,310
         Less accumulated depreciation and amortization   310,257      304,322
                                                        ---------    ---------
                 Net utility plant                        714,657      696,988
                                                        ---------    ---------

Current assets:
         Cash and cash equivalents                          1,718        1,063
         Receivables                                       20,648       23,961
         Unbilled revenue                                   6,946        7,969
         Materials and supplies at average cost             2,626        2,760
         Taxes and other prepaid expenses                   6,406        7,234
                                                        ---------    ---------
                 Total current assets                      38,344       42,987
                                                        ---------    ---------

Other assets:
         Regulatory assets                                 46,314       46,089
         Other assets                                      16,009       14,518
                                                        ---------    ---------
                 Total other assets                        62,323       60,607
                                                        ---------    ---------
                                                        ---------    ---------
                                                        $ 815,324    $ 800,582
                                                        =========    =========

CAPITALIZATION AND LIABILITIES
Capitalization:
         Common stock, $0.01 par value                  $     152    $     152
         Additional paid-in capital                        49,984       49,984
         Retained earnings                                144,139      149,215
         Accumulated other comprehensive loss                (134)        (134)
                                                        ---------    ---------
                 Total common stockholders' equity        194,141      199,217
         Preferred stock                                    3,475        3,475
         Long-term debt, less current maturities          270,075      250,365
                                                        ---------    ---------
                 Total capitalization                     467,691      453,057
                                                        ---------    ---------

Current liabilities:
         Current maturities of long-term debt               1,000        1,000
         Short-term borrowings                             31,577       36,379
         Accounts payable                                  23,026       23,706
         Accrued expenses and other liabilities            33,188       30,456
                                                        ---------    ---------
                 Total current liabilities                 88,791       91,541

Unamortized investment tax credits                          2,774        2,774
Deferred income taxes                                      31,252       31,371
Regulatory and other liabilities                           28,804       28,804
Advances for construction                                 116,739      115,459
Contributions in aid of construction                       79,273       77,576
Commitments and contingencies
                                                        ---------    ---------
                                                        $ 815,324    $ 800,582
                                                        =========    =========

                                  Page 8 of 9



CALIFORNIA WATER SERVICE GROUP
CONDENSED CONSOLIDATED STATEMENT OF INCOME
 Unaudited
(In thousands, except per share data)
For the three months ended:                          March 31,   March 31,
                                                       2003        2002
                                                       ----        ----
Operating revenue                                    $ 51,310    $ 51,611
                                                     --------    --------
Operating expenses:
        Operations                                     37,855      34,774
        Maintenance                                     3,253       2,420
        Depreciation and amortization                   5,760       5,394
        Income taxes                                     (553)      1,279
        Property and other taxes                        2,465       2,463
                                                     --------    --------
              Total operating expenses                 48,780      46,330
                                                     --------    --------

              Net operating income                      2,530       5,281
                                                     --------    --------

Other income and expenses:
              Non-regulated income, net                   706         455
              Gain on sale of non-utility property        552          50
                                                     --------    --------
                                                        1,258         505
                                                     --------    --------

              Income before interest expense            3,788       5,786
                                                     --------    --------

Interest expense:
        Long-term debt interest                         4,178       3,532
        Other interest                                    378         326
                                                     --------    --------
              Total interest expense                    4,556       3,858
                                                     --------    --------

Net (loss) income                                    $   (768)   $  1,928
                                                     ========    ========

Earnings per share
        Basic                                        $  (0.05)   $   0.12
                                                     ========    ========
        Diluted                                      $  (0.05)   $   0.12
                                                     ========    ========
Weighted average shares outstanding
        Basic                                          15,182      15,182
                                                     ========    ========
        Diluted                                        15,182      15,185
                                                     ========    ========
Dividends per share of common stock                  $0.28125    $0.28000
                                                     ========    ========


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