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

                                    FORM 8-K




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


     Date of  report  (Date  of  earliest  event  reported):  October  26,  2005
                                                             -------------------



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




     Delaware                        1-13883                      77-0448994
--------------------------------------------------------------------------------
(State or other jurisdiction       (Commission                (I.R.S. Employer
     of Incorporation)                  File Number)         Identification No.)


      1720 North First Street, San Jose, CA.                       95112
--------------------------------------------------------------------------------
     (Address of principal executive offices)                    (Zip Code)

Registrant's telephone number, including area code           1-408-367-8200
                                                   -----------------------------


                                 Not Applicable
--------------------------------------------------------------------------------
          (Former name or former address, if changed since last report)


Check  the  appropriate  box  below  if the  form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

[ ]  Written  communications  pursuant to Rule  425 under the Securities Act (17
CFR 230.425)

[ ]  Soliciting  material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
Exchange 240.14a-12)

[ ]  Pre-commencement   communications   pursuant  to  Rule 14d-2(b)  under  the
Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement   communications  pursuant  to  Rule 13e-4(c )  under  the
Exchange Act (17 CFR 240.13e-4(c ))
--------------------------------------------------------------------------------



Item 2.02 Results of Operations and Financial Condition.


     On October 26, 2005,  the registrant  issued the press release  attached to
this report as Exhibit 99, which  announces  the results of  operations  for the
third quarter of 2005.


Item 9.01 Financial Statements and Exhibits.

(c) Exhibits.

     The list of exhibits  called for by this Item is  incorporated by reference
to the exhibit index to this report.





                                   SIGNATURES

     Pursuant to the requirement of the Securities and Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.



                         CALIFORNIA WATER SERVICE GROUP
                                  (Registrant)



Date: October 26, 2005                      By:      /s/ John S. Tootle
                                                         --------------
                                                         John S. Tootle
                                                         Acting Vice President,
                                                         Chief Financial Officer
                                                         and Treasurer




                                  Exhibit Index


Exhibit No.                                 Description
-----------                                 -----------
   99                         Press release of the registrant  dated October 26,
                              2005 which announces the results of operations for
                              the third quarter of 2005.





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

               1720 North First Street
               San Jose, CA 95112-4598                          October 26, 2005
                                                           For Immediate Release
Contact:       John S. Tootle (408) 367-8216 (analysts)
               Shannon Dean (310) 257-1435 (media)

                 CAL WATER ANNOUNCES THIRD QUARTER 2005 RESULTS;
               BOARD DECLARES 244TH CONSECUTIVE QUARTERLY DIVIDEND
--------------------------------------------------------------------------------


     SAN JOSE, CA - California  Water Service Group (NYSE : CWT) today announced
net income of $13.1  million  and  diluted  earnings  of $0.71 per share for the
third  quarter of 2005,  compared  to net income of $10.8  million  and  diluted
earnings of $0.59 per share in the third quarter of 2004.

     Revenue for the third  quarter  increased  4%, or $4.0  million,  to $101.1
million.  Rate  increases  added $4.4  million to  revenue,  while  sales to new
customers added $1.2 million.  Partially  offsetting these higher revenues was a
$1.6 million decrease due to reduced usage by existing customers compared to the
same period last year.

     Total  operating  expenses  for the  third  quarter  increased  3%, or $2.4
million.  Water production costs decreased by 2%, or $0.8 million,  due to lower
customer water usage and power costs.  Other operations  expenses were unchanged
from the same period last year,  and income taxes  increased $1.9 million or 27%
due to higher pre-tax  earnings.  Maintenance  expense  increased by 7%, or $0.2
million, as the Company made necessary repairs and upgrades to pumping equipment
and water mains.  Depreciation  expense  increased 12%, or $0.8 million,  due to
higher 2004 capital expenditures.
                  
     Third quarter 2005  earnings  were  enhanced by a $0.8 million  increase in
other income, primarily due to an increase of $0.7 million for sales of property
no longer used and useful in serving customers.
                  
     "We are  pleased  with our  results  for the  quarter,  although  our sales
continue  to be  impacted  by reduced  customer  usage in some of our  operating
areas.  By pursuing  reasonable rate relief,  holding the line on expenses,  and
continuing to execute our strategic real estate sales  program,  we were able to
deliver good  results,"  said  President  and Chief  Executive  Officer Peter C.
Nelson.


                
     At its meeting today,  the Company's Board of Directors  declared the 244th
consecutive  dividend in the amount of $0.2850 per share of common stock,  to be
paid on November 18, 2005, to  stockholders  of record on November 7, 2005.  The
regular dividend on Series C preferred stock was also declared.

     Investors  are invited to listen to the Company's  analyst  teleconference,
which is scheduled  for 4:00 p.m.  EDT / 1:00 p.m. PDT on October 27, 2005.  The
call-in number is 1-866-243-8959 and the ID No. is 789267. A replay is available
through  December 26, 2005,  by calling  1-888-266-2081  and entering  pass code
789267.

     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 more than 2
million  people  in  100  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, including decisions on proper disposition
of property;  changes in regulatory  commissions'  policies and procedures;  the
timeliness  of  regulatory  commissions'  actions  concerning  rate relief;  new
legislation;  the ability to satisfy  requirements related to the Sarbanes-Oxley
Act and other regulations on internal  controls;  electric power  interruptions;
increases in suppliers' prices and the availability of supplies  including water
and power;  fluctuations in interest rates; changes in environmental  compliance
and water quality  requirements;  acquisitions  and 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  online  at www.calwatergroup.com.
                                                   ---------------------

        Attachments (2).

                                       ###






CALIFORNIA WATER SERVICE GROUP
CONDENSED CONSOLIDATED BALANCE SHEETS
(In thousands, except per share data)


Unaudited                                                                    September 30,    December 31,
                                                                                 2005             2004
                                                                                 ----             ----
ASSETS
Utility plant:
                                                                                                
           Utility plant                                                      $ 1,199,681     $ 1,144,074
           Less accumulated depreciation and amortization                         366,019         343,769
                                                                              -----------     -----------
                                                                                  833,662         800,305
                                                                              -----------     -----------
Current assets:
           Cash and cash equivalents                                               23,791          18,820
           Rece  Receivables, net of allowances for uncollectible accounts
           of $416 at September 30, 2005 and $ 287 at December 31, 2004
                       Customers                                                   22,779          15,867
                       Income taxes                                                  --             7,298
                       Other                                                        3,865           3,147
           Unbilled revenue                                                        14,271           9,307
           Materials and supplies, at average cost                                  4,017           3,161
           Prepaid pension expense                                                  2,599           3,671
           Taxes and other prepaid expenses                                         4,055           9,122
                                                                              -----------     -----------
                                         Total current assets                      75,377          70,393
                                                                              -----------     -----------
Regulatory assets                                                                  55,449          53,477
Other assets                                                                       20,329          18,678
                                                                              -----------     -----------
                                                                              $   984,817     $   942,853
                                                                              ===========     ===========

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


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





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


                                                               For the three months ended:         For the nine months ended:
                                                              September 30,    September 30,     September 30,     September 30,
                                                                 2005             2004              2005              2004
                                                                 ----             ----              ----              ----

                                                                                                             
Operating revenue                                              $101,128          $ 97,104          $242,888          $246,189
                                                               --------          --------          --------          --------
Operating expenses:
      Water production costs                                     39,205            40,052            88,420            94,776
      Other operations                                           22,307            22,404            66,054            64,628
      Maintenance                                                 3,877             3,640            11,295             9,853
      Depreciation and amortization                               7,287             6,518            21,289            19,557
      Income taxes                                                8,968             7,050            14,571            14,852
      Property and other taxes                                    3,381             2,942             9,438             8,551
                                                               --------          --------          --------          --------
         Total operating expenses                                85,025            82,606           211,067           212,217
                                                               --------          --------          --------          --------
         Net operating income                                    16,103            14,498            31,821            33,972
                                                               --------          --------          --------          --------

Other income and expenses:
         Non-regulated income, net                                  778               650             2,121             1,773
         Gain on sale of non-utility property                       669                 6               728                 7
                                                               --------          --------          --------          --------
         Total other income and expenses                          1,447               656             2,849             1,780
                                                               --------          --------          --------          --------

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

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

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