Exhibit 99

     [LOGO]
CALIFORNIA WATER
  SERVICE GROUP

                                  NEWS RELEASE
                         CALIFORNIA WATER SERVICE GROUP

         1720 North First Street
         San Jose, CA 95112-4598                                   July 23, 2003
                                                           For Immediate Release
Contact: Richard Nye  (408) 367-8216 (analysts)
         Shannon Dean (310) 257-1435 (media)           03GO8
                                                       -----

                CAL WATER ANNOUNCES SECOND QUARTER 2003 RESULTS;
               BOARD DECLARES 235H CONSECUTIVE QUARTERLY DIVIDEND

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

SAN JOSE,  CA -  California  Water  Service  Group (NYSE : CWT) today  announced
second  quarter  net income of $4.6  million  and  earnings  of $0.30 per share,
compared to net income of $6.6  million  and  earnings of $0.43 per share in the
second quarter of 2002.

     According to President and Chief  Executive  Officer  Peter C. Nelson,  the
company's  financial  performance  continues to be hampered by lower water usage
due to cool,  wet weather and ongoing  delays in receiving  rate relief from the
California Public Utilities Commission ("Commission").

     "In the second  quarter,  we  continued  to  experience  cooler than normal
temperatures  and a good deal of  unseasonable  rain in our service areas.  More
significantly,   we  continue  to  await   considerable  rate  relief  from  the
Commission," he said.

     Revenue for the quarter was $68.0  million,  down $1.2 million or 1.7% from
the second  quarter of 2002. A $4.5 million  decrease in water sales to existing
customers  was  partially  offset by $1.4 million in sales to new  customers and
$1.9 million in rate increases.


     Total operating expenses decreased 0.5%, or $0.3 million.  Water production
costs  decreased by $1.0  million,  primarily  due to lower usage and  partially
offset by higher rates for water and power.  Other operations  expense increased
$1.4 million or 7%, due  principally  to increases in pension,  health and other
benefits.  Depreciation  expense was higher by $0.4  million due to 2002 capital
expenditures  driven by more  stringent  water quality  standards.  Income taxes
decreased $1.3 million due to lower profits.

     According  to  Nelson,  regulatory  delays had the  greatest  impact on the
company's performance.

     "We are still awaiting a decision on the 15 rate cases we submitted in July
2001.  When the decision is finally  issued,  we anticipate  that it will add at
least $12.8 million in annual revenues," he said.

     In May, the company began  collecting  surcharges for some of its districts
to recover higher  electricity costs incurred prior to November 29, 2001 but not
yet billed to customers. The surcharges approved thus far by the Commission will
add net revenue of $2.8 million,  which will be collected  from May 2003 through
June 2004.  The  Commission  has also  approved an  additional  $1.8  million in
surcharges to be collected from May 2004 through June 2005.

     Pending  applications  to the Commission  include general rate case filings
made in November 2002 and January 2003. The company cannot predict the amount or
the timing of CPUC decisions on those applications.

     In a June 2003  decision,  the  Commission  authorized  water  utilities to
request recovery of  "balancing-type  memorandum  accounts," which are primarily
comprised of higher  electricity  costs incurred  between  November 29, 2001 and
December 31, 2002. Unlike the recovery of costs for the period prior to November
29, 2001,  recovery for balances  accrued  during this period will be subject to
certain  limitations.  Prior to the June 2003 decision,  water utilities had not
been allowed to request recovery of increased  electricity costs for this period
at all. The company intends to request approximately $6



million in the third  quarter,  although it cannot predict the amount it will be
authorized to recover.  A decision is expected from the Commission by the end of
2003.

     Also in the third quarter of 2003, the company expects to file the third of
three filings to recover costs associated with the Bakersfield  Treatment Plant,
which  began  operating  in June 2003 and will add 20  million  gallons  of high
quality water per day to the Bakersfield supply. The third filing may or may not
impact 2003  revenues,  depending  upon the timing and amount  authorized by the
Commission.

     "We continue to be proactive in requesting rate relief,  requesting  timely
decisions on general rate case filings and  requesting  fair  reimbursement  for
balancing accounts." Nelson said.

     At their meeting today,  Directors declared the 235th consecutive quarterly
dividend on common stock in the amount of $0.28125.  It is payable on August 15,
2003, to  stockholders  of record on August,  1, 2003.  The regular  dividend on
Series C preferred stock was also declared.

     On Thursday, July 24, 2003, at 1 p.m. Pacific Standard Time (4 p.m. Eastern
Standard Time),  the Company will conduct a  teleconference  call, at which time
management will provide comments about second quarter 2003 operating results and
other pertinent  matters.  Any stockholder or interested  investor can listen to
the  teleconference or a replay. The dial-in number to access the teleconference
is  1-877-679-9045,  call ID  #98736.  Additional  information  about  the call,
including  replay  information,  is  available  at the  Company's  web site,  at
www.calwater.com.

     California  Water Service Group is the parent  company of California  Water
Service  Company,  Washington  Water Service  Company,  New Mexico Water Service
Company,  Hawaii Water Service Company, Inc. and CWS Utility Services.  Together



these  companies  provide  regulated and  non-regulated  water service to over 2
million people in 99 California,  Washington, New Mexico and Hawaii 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  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 (3).

                                       ###



CALIFORNIA WATER SERVICE GROUP
CONDENSED CONSOLIDATED BALANCE SHEET
Unaudited
(In thousands, except per share data)                  June 30,     December 31,
                                                         2003          2002
                                                      -----------   -----------
ASSETS
Utility plant:
       Utility plant                                  $ 1,054,394   $ 1,001,310
       Less accumulated depreciation and amortization     316,121       304,322
                                                      -----------   -----------
            Net utility plant                             738,273       696,988
                                                      -----------   -----------

Current assets:
       Cash and cash equivalents                              992         1,063
       Receivables                                         28,061        23,961
       Unbilled revenue                                    10,039         7,969
       Materials and supplies at average cost               2,800         2,760
       Taxes and other prepaid expenses                     5,571         7,234
                                                      -----------   -----------
            Total current assets                           47,463        42,987
                                                      -----------   -----------

Other assets:
       Regulatory assets                                   52,703        46,089
       Other assets                                        16,825        14,518
                                                      -----------   -----------
            Total other assets                             69,528        60,607
                                                      -----------   -----------
                                                      -----------   -----------
                                                      $   855,264   $   800,582
                                                      ===========   ===========

CAPITALIZATION AND LIABILITIES
Capitalization:
       Common stock, $.01 par value                   $       152   $       152
       Additional paid-in capital                          49,984        49,984
       Retained earnings                                  144,416       149,215
       Accumulated other comprehensive loss                  (134)         (134)
                                                      -----------   -----------
            Total common stockholders' equity             194,418       199,217
       Preferred stock                                      3,475         3,475
       Long-term debt, less current maturities            270,918       250,365
                                                      -----------   -----------
            Total capitalization                          468,811       453,057
                                                      -----------   -----------

Current liabilities:
       Current maturities of long-term debt                 1,000         1,000
       Short-term borrowings                               50,058        36,379
       Accounts payable                                    28,550        23,706
       Accrued expenses and other liabilities              31,690        30,456
                                                      -----------   -----------
            Total current liabilities                     111,298        91,541

Unamortized investment tax credits                          2,819         2,774
Deferred income taxes                                      33,855        31,371
Regulatory and other liabilities                           34,015        28,804
Advances for construction                                 119,549       115,459
Contributions in aid of construction                       84,917        77,576
Commitments and contingencies
                                                      -----------   -----------
                                                      $   855,264   $   800,582
                                                      ===========   ===========


CALIFORNIA WATER SERVICE GROUP
CONDENSED CONSOLIDATED STATEMENT OF INCOME
(In thousands, except per share data)
Unaudited
For the three months ended:                                 June 30,    June 30,
                                                              2003        2002
                                                            --------    --------

Operating revenue                                            $67,994     $69,183
                                                            --------    --------
Operating expenses:
      Operations                                              45,693      45,330
      Maintenance                                              3,063       2,935
      Depreciation and amortization                            5,838       5,389
      Income taxes                                             3,314       4,573
      Property and other taxes                                 2,538       2,551
                                                            --------    --------
          Total operating expenses                            60,446      60,778
                                                            --------    --------

          Net operating income                                 7,548       8,405
                                                            --------    --------

Other income and expenses:
          Non-regulated income, net                              559         508
          Gain on sale of non-utility property                   958       1,922
                                                            --------    --------
                                                               1,517       2,430

Interest expense:
      Long-term debt interest                                  4,039       3,837
      Other interest                                             441         380
                                                            --------    --------
          Total interest expense                               4,480       4,217

Net income                                                   $ 4,585     $ 6,618
                                                            ========    ========

Earnings per share
      Basic                                                  $  0.30     $  0.43
                                                            ========    ========
      Diluted                                                $  0.30     $  0.43
                                                            ========    ========
Weighted average shares outstanding
      Basic                                                   15,182      15,182
                                                            ========    ========
      Diluted                                                 15,198      15,185
                                                            ========    ========
Dividends per share of common stock                         $0.28125    $0.28000
                                                            ========    ========



CALIFORNIA WATER SERVICE GROUP
CONDENSED CONSOLIDATED STATEMENT OF INCOME
(In thousands, except per share data)
Unaudited
For the six months ended:                                  June 30,     June 30,
                                                             2003         2002
                                                           --------     --------

Operating revenue                                          $119,305     $120,794
                                                           --------     --------
Operating expenses:
      Operations                                             83,453       80,032
      Maintenance                                             6,316        5,355
      Depreciation and amortization                          11,598       10,783
      Income taxes                                            2,761        5,852
      Property and other taxes                                5,003        5,014
                                                           --------     --------
          Total operating expenses                          109,131      107,036
                                                           --------     --------

          Net operating income                               10,174       13,758
                                                           --------     --------

Other income and expenses:
          Non-regulated income, net                           1,169          891
          Gain on sale of non-utility property                1,511        1,973
                                                           --------     --------
                                                              2,680        2,864

Interest expense:
      Long-term debt interest                                 8,217        7,369
      Other interest                                            820          706
                                                           --------     --------
          Total interest expense                              9,037        8,075

Net income                                                 $  3,817     $  8,547
                                                           ========     ========

Earnings per share
      Basic                                                $   0.25     $   0.56
                                                           ========     ========
      Diluted                                              $   0.25     $   0.56
                                                           ========     ========
Weighted average shares outstanding
      Basic                                                  15,182       15,182
                                                           ========     ========
      Diluted                                                15,191       15,185
                                                           ========     ========
Dividends per share of common stock                        $ 0.5625     $ 0.5600
                                                           ========     ========