UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                  SCHEDULE 14A

                Proxy Statement Pursuant to Section 14(a) of the
               Securities Exchange Act of 1934 (Amendment No. ___)

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|_|  Soliciting Material Pursuant to Rule-14a-11(c)-or Rule-14a-12

                         California Water Service Group
                ------------------------------------------------
                (Name of Registrant as Specified in Its Charter)


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          SEC 1913 (03-04)
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California Water Service Group
Notice of 2006 Annual Meeting and Proxy Statement

                                                           Life's Key Ingredient

                                [GRAPHIC OMITTED]




[LOGO]  California Water Service Group
        California Water Service Company, Hawaii Water Service Company,
        New Mexico Water Service Company, Washington Water Service Company and
        CWS Utility Services
        1720 North First Street * San Jose, CA 95112-4598 * (408) 367-8200

March 27, 2006

Dear Fellow Stockholder:

     You are cordially  invited to attend our Annual Meeting of  Stockholders at
9:30 a.m. on Wednesday,  April 26, 2006, at the executive  offices of California
Water Service Group, located at 1720 North First Street in San Jose, California.

     Enclosed are a notice of matters to be voted on at the  meeting,  our proxy
statement, a proxy card and our 2005 Annual Report.

     Whether or not you plan to attend, your vote is important. Please vote your
shares,  as soon as possible,  in one of three ways: via Internet,  telephone or
mail.  Instructions  regarding Internet and telephone voting are included in the
proxy card. If you choose to vote by mail,  please mark, sign and date the proxy
card and return it in the enclosed postage-paid envelope.

     Thank you for your investment in the California Water Service Group.

Sincerely,

/s/ Robert W. Foy
-----------------
ROBERT W. FOY
CHAIRMAN OF THE BOARD


                                                California Water Service Group 1



2006 ANNUAL MEETING OF STOCKHOLDERS
NOTICE OF ANNUAL MEETING AND PROXY STATEMENT
TABLE OF CONTENTS



                                                                                             
NOTICE OF ANNUAL MEETING
QUESTIONS AND ANSWERS ABOUT THE PROXY MATERIALS AND THE ANNUAL MEETING..........................4
  What am I voting on?..........................................................................5
  Who may attend the Annual Meeting?............................................................5
  Who is entitled to vote?......................................................................5
  How many votes do I get?......................................................................5
  What is "cumulative voting" and how does it work?.............................................5
  How are the directors elected?................................................................5
  Who are the Board's nominees?.................................................................5
  What is the required vote for the second proposal to pass?....................................5
  How do I vote?................................................................................5
  What if I change my mind after I return my proxy?.............................................6
  Will my shares be voted if I do not return my proxy?..........................................6
  What happens if my shares are held by my stockbroker?.........................................6
  What happens if I abstain from voting on a proposal?..........................................6
  Who will count the vote?......................................................................6
  What does it mean if I get more than one proxy card?..........................................7
  What constitutes a quorum?....................................................................7
  What percentage of stock do the directors and executive officers own?.........................7
  Who are the largest common stockholders?......................................................7
  What is the deadline for submitting stockholder proposals for the Group's proxy materials
    for next year's Annual Meeting?.............................................................7
  How can a stockholder propose a nominee for the Board?........................................7
  How can a stockholder propose business at a stockholders' meeting?............................8
  How can a stockholder or other interested party contact the independent directors, the
    director who chairs the Board's executive  sessions or the full Board?......................8
  Can I make comments and/or ask questions during the Annual Meeting?...........................8
BOARD STRUCTURE.................................................................................9
Committees......................................................................................9
  Audit ........................................................................................9
  Compensation .................................................................................9
  Finance ......................................................................................9
  Nominating/Corporate Governance ..............................................................9
  Executive ....................................................................................9
Independence of Directors......................................................................10
Director Qualifications........................................................................11
Identification of Director Nominees............................................................11
Executive Sessions of the Board................................................................11
Corporate Governance Guidelines................................................................11
Director Compensation Arrangements.............................................................12
Retirement Age of Directors....................................................................12
Director Retirement Plan.......................................................................12
Annual Meeting Attendance......................................................................12
PROPOSAL NO. 1--ELECTION OF DIRECTORS..........................................................13
STOCK OWNERSHIP OF MANAGEMENT AND CERTAIN BENEFICIAL OWNERS....................................16
  Ownership of Directors and Executive Officers................................................16
  Ownership of Largest Principal Stockholders..................................................17
  Section 16(a) Beneficial Ownership Reporting Compliance......................................17


2 California Water Service Group

2006 ANNUAL MEETING OF STOCKHOLDERS
NOTICE OF ANNUAL MEETING AND PROXY STATEMENT
TABLE OF CONTENTS



                                                                                           
EXECUTIVE COMPENSATION.........................................................................18
  Summary Compensation Table...................................................................18
  Severance Agreements.........................................................................18
  Separation Agreement.........................................................................19
  Options/SAR Grants in 2005...................................................................19
  Aggregated Option/SAR Exercises in 2005 and 2005 Fiscal Year-End Option/SAR Values...........19
  Equity Compensation Plan Information.........................................................20
  Pension Plans................................................................................20
  Report of the Compensation Committee of the Board of Directors on Executive Compensation.....21
  Compensation Committee Interlocks and Insider Participation..................................23
AUDIT COMMITTEE................................................................................24
  Report of the Audit Committee................................................................24
  Relationship with Independent Registered Public Accounting Firm..............................25
PERFORMANCE GRAPH..............................................................................26
PROPOSAL NO. 2--RATIFICATION OF SELECTION OF KPMG LLP AS INDEPENDENT REGISTERED PUBLIC
ACCOUNTING FIRM FOR 2006 ......................................................................27
CERTAIN TRANSACTIONS ..........................................................................28
OTHER MATTERS..................................................................................28
APPENDIX A ....................................................................................29
  Audit Committee Charter......................................................................29


For directions to the Annual Meeting, please refer to the map on the inside back
cover.

                                                California Water Service Group 3


                         CALIFORNIA WATER SERVICE GROUP
                             1720 North First Street
                             San Jose, CA 95112-4598
                                 (408) 367-8200

                           Notice of Annual Meeting of Stockholders

TIME                       9:30 a.m. on Wednesday, April 26, 2006

PLACE                      Executive Offices of California Water Service Group,
                           1720 North First Street, San Jose, California

ITEMS OF BUSINESS          (1)   To elect directors

                           (2)   To  ratify  the  appointment   of   independent
                                 registered public accounting firm

                           (3)   To consider such other business as may properly
                                 come before the meeting

RECORD DATE                You are entitled to vote if you were a stockholder at
                           the close of business on Monday, February 27, 2006.

VOTING BY PROXY            Please  submit  a proxy as soon as  possible  so that
                           your shares can be voted at the meeting in accordance
                           with your instructions. You may submit your proxy (1)
                           over the Internet, (2) by telephone,  or (3) by mail.
                           For  specific  instructions,   please  refer  to  the
                           Questions  and  Answers  beginning  on page 5 of this
                           proxy  statement  and the  instructions  on the proxy
                           card.

By Order of the Board of Directors


DAN L. STOCKTON
Corporate Secretary

This notice of meeting and proxy statement and accompanying proxy card are being
distributed beginning on or about March 27, 2006.

4 California Water Service Group

QUESTIONS AND ANSWERS ABOUT THE PROXY MATERIALS AND THE ANNUAL MEETING

What am I voting on?

o        Election of nine directors to serve until the 2007 Annual Meeting.

o        Ratification  of the  Audit  Committee's  selection  of KPMG LLP as the
         Group's independent registered public accounting firm for 2006.

     Those  elected  to serve as the  Group's  directors  also will serve as the
directors of California Water Service Company and CWS Utility  Services,  two of
the Group's operating subsidiaries.

Who may attend the Annual Meeting?

All Group stockholders may attend.

Who is entitled to vote?

Stockholders  of record at the  close of  business  on  February  27,  2006 (the
"Record  Date"),  or those with a valid proxy from a  brokerage  firm or another
similar organization which held shares on the Record Date.

How many votes do I get?

Each share of common  stock is  entitled  to one vote.  Each share of  preferred
stock is  entitled  to 16 votes.  You may also use  "cumulative  voting"  in the
election of directors.

What is "cumulative voting" and how does it work?

Stockholders or persons holding a valid proxy may "cumulate" their votes for the
election of directors.  That is, they may give one candidate nine votes for each
common share owned.  Instead of casting one vote for each of the nine candidates
they may cast all nine  votes for a single  candidate  or,  they may  distribute
their  votes on the same  principle  among as many  candidates  as they  desire.
Because each preferred share is entitled to 16 votes, preferred stockholders may
cumulate  144  votes  (16 x 9) for  each  share  owned.  If you do not  indicate
otherwise, the proxies may use their discretion to cumulate votes.

How are the directors elected?

The nine  nominees  receiving  the  highest  number of votes are  elected to the
Board. Common and preferred shares vote together on directors.

Who are the Board's nominees?

The nominees are Douglas M. Brown,  Robert W. Foy, Edward D. Harris,  Jr., M.D.,
Bonnie G. Hill, David N. Kennedy,  Richard P. Magnuson, Linda R. Meier, Peter C.
Nelson,  and George A. Vera.  All the nominees are current  Board  members.  See
pages  13-15 for  biographical  information,  including  the  nominees'  current
directorships in other publicly held companies.

What is the required vote for the second proposal to pass?

In  order  for  the  Audit  Committee's  selection  of KPMG  LLP as  independent
registered public accounting firm to be ratified,  the proposal must receive the
affirmative vote of a majority of the shares present in person or represented by
proxy and entitled to vote at the meeting.

How do I vote?

You may vote by mail.

     You do this by  signing  the proxy  card and  mailing  it in the  enclosed,
prepaid and  addressed  envelope.  If you mark your voting  instructions  on the
proxy card, your shares will be voted as you instruct.

You may vote by telephone.

     You do this by following the "Vote by Telephone"  instructions on the proxy
card. If you vote by telephone,  you do not have to mail in your proxy card. You
must have a touch-tone phone to vote by telephone.

                                                California Water Service Group 5

QUESTIONS AND ANSWERS ABOUT THE PROXY MATERIALS AND THE ANNUAL MEETING

You may vote on the Internet.

     You do this by following the "Vote by Internet"  instructions  on the proxy
card. If you vote on the Internet, you do not have to mail in your proxy card.

You may vote in person at the meeting.

     We will  hand  out  written  ballots  to  anyone  who  wants to vote at the
meeting.  If you hold your shares in street name, you must request a legal proxy
from your stockbroker in order to vote at the meeting.

     If you return a signed card but do not provide  voting  instructions,  your
shares will be voted:

o        for the nine named director nominees
o        for the ratification of the selection of independent  registered public
         accounting firm

     We have been advised by counsel that these  telephone  and Internet  voting
procedures comply with Delaware law.

What if I change my mind after I return my proxy?

You may revoke your proxy any time before the polls  close at the  meeting.  You
may do this by:

o        signing another proxy with a later date,
o        voting by  telephone  or on the  Internet  (your  latest  telephone  or
         Internet proxy is counted),
o        voting again at the meeting, or
o        notifying the Corporate Secretary,  in writing, that you wish to revoke
         your previous  proxy.  We must receive your notice prior to the vote at
         the Annual Meeting.

Will my shares be voted if I do not return my proxy?

If you are a  stockholder  of record  (that is, you hold your shares in your own
name),  your shares will not be voted  unless you attend the meeting and vote in
person. Different rules apply if your stockbroker holds your shares for you.

What happens if my shares are held by my stockbroker?

Your stockbroker, under certain circumstances, may vote your shares.

     Stockbrokers  must  write to you  asking  how you want your  shares  voted.
However,  if you do not respond,  stockbrokers  have  authority  under  exchange
regulations to vote your unvoted shares on certain "routine" matters,  including
election of directors  and  ratification  of the  selection  of the  independent
registered public accounting firm. If you wish to change voting instructions you
give to your stockbroker, you must ask your stockbroker how to do so.

     If you do not give your stockbroker  voting  instructions,  the stockbroker
may either:

o        proceed to vote your shares on routine  matters and refrain from voting
         on nonroutine matters, or
o        leave your shares entirely unvoted.

     Shares that your stockbroker does not vote  ("stockbroker  non-votes") will
count  towards  the  quorum  only.  We  encourage  you to  provide  your  voting
instructions to your stockbroker. This ensures that your shares will be voted at
the meeting.

     You may have granted to your  stockbroker  discretionary  voting  authority
over your account.  If so, your stockbroker may be able to vote your shares even
on  nonroutine  matters,  depending on the terms of the  agreement you have with
your stockbroker.

What happens if I abstain from voting on a proposal?

If you abstain  from  voting on a proposal  (either by proxy or in person at the
Annual  Meeting),  your shares will be counted in determining  whether we have a
quorum,  but the  abstention  will  have the same  effect  as a vote  against  a
proposal.

Who will count the vote?

Representatives  of American Stock  Transfer and Trust Co., our transfer  agent,
will serve as the inspector of elections and count the votes.

6 California Water Service Group

QUESTIONS AND ANSWERS ABOUT THE PROXY MATERIALS AND THE ANNUAL MEETING

What does it mean if I get more than one proxy card?

It means that you have  multiple  accounts  at the  transfer  agent  and/or with
stockbrokers.  Please  sign and return all proxy  cards to ensure  that all your
shares are voted.

What constitutes a quorum?

A  majority  of  the  outstanding  shares--present  at  the  Annual  Meeting  or
represented  by persons  holding  valid  proxies--constitutes  a quorum.  If you
submit a valid proxy card, your shares will be part of the quorum.

     Without a quorum,  no business  may be  transacted  at the Annual  Meeting.
However, whether or not a quorum exists, a majority of the voting power of those
present at the Annual  Meeting may adjourn the Annual  Meeting to another  date,
time and place.

     At the Record Date,  there were 3,024  stockholders  of record.  There were
18,405,138  shares of our common stock  outstanding  and entitled to vote at the
Annual  Meeting  and  139,000  shares of our  preferred  stock  outstanding  and
entitled to vote at the Annual Meeting.

What percentage of stock do the directors and executive officers own?

Together,  they own less than one percent of our common and preferred stock. See
page 16 for more details.

Who are the largest common stockholders?

As of January 1, 2006, the largest  principal  stockholder was SJW Corp.,  which
held  1,099,952  shares of  common  stock,  representing  6%. To the best of our
knowledge,  no other stockholders held over 5% of our common shares. See page 17
for more details.

What is the deadline for submitting  stockholder proposals for the Group's proxy
materials for next year's Annual Meeting?

Any proposals which stockholders intend to present at the 2007 Annual Meeting of
stockholders  must be  received  by the  Corporate  Secretary  of the  Group  by
November 27, 2006 in order to be  considered  for  inclusion in the Group's 2007
proxy materials. A proposal and any supporting statement together may not exceed
500 words. Please submit the proposal to Dan L. Stockton,  Corporate  Secretary,
California Water Service Group,  1720 North First Street,  San Jose,  California
95112-4598.

How can a stockholder propose a nominee for the Board?

Any stockholder of record who is entitled to vote at a stockholders' meeting may
propose a nominee for the Board.  The bylaws contain the  requirements for doing
so.  Contact  the  Corporate  Secretary  to  request  a copy of the  full  bylaw
requirements. Briefly, a stockholder must give timely prior notice to the Group.
The notice must be received by the Corporate  Secretary at the Group's principal
place of  business  by the 150th day before the first  anniversary  of the prior
year's  Annual  Meeting.  If we move the date of the meeting by more than thirty
days  before or more than  sixty days  after the date of the  previous  meeting,
notice is due by the 150th day before  the Annual  Meeting or the 10th day after
we publicly announce the holding of the meeting.

     If the Board calls a special meeting to elect directors, stockholder notice
is due by the 150th day prior to that  meeting or the 10th day after we publicly
announce the holding of the special  meeting and  identify the Board's  director
nominees.  The bylaws do not affect the rights of preferred  holders to nominate
directors where they are otherwise entitled to do so.

     The bylaws  specify what the notice must contain.  The notice  deadline for
the 2007 Annual Meeting is November 27, 2006.

                                                California Water Service Group 7

QUESTIONS AND ANSWERS ABOUT THE PROXY MATERIALS AND THE ANNUAL MEETING

How can a stockholder propose business at a stockholders' meeting?

Any stockholder of record who is entitled to vote at a stockholders' meeting may
propose business for the meeting.  Just as with nominations,  the bylaws contain
the requirements. Contact the Corporate Secretary and request a copy of the full
bylaw requirements.  The stockholder must give timely prior notice to the Group.
The deadlines are the same as for stockholder  nominations  discussed  above. If
the  Group's  Secretary  receives a  proposal  after  that  deadline  it will be
considered untimely, and the persons named in the proxy for the 2007 meeting may
exercise their discretion in voting with respect to the proposal.

     The bylaws specify what the notice must contain.  Stockholders  must comply
with all requirements of the securities laws regarding proposals.  The bylaws do
not affect  any  stockholder  right to request  inclusion  of  proposals  in the
Group's  proxy  statement  under  the  rules  of  the  Securities  and  Exchange
Commission.

     Because of the 150-day notice requirement discussed above, stockholders who
have not given prior notice may not raise a proposal (or a  nomination)  at this
year's meeting.

How  can a  stockholder  or  other  interested  party  contact  the  independent
directors,  the director who chairs the Board's  executive  sessions or the full
Board?

Stockholders  or other  interested  parties may address  inquiries to any of the
Group's directors, to the director who chairs of the Board's executive sessions,
or to the full  Board,  by  writing  to Dan L.  Stockton,  Corporate  Secretary,
California Water Service Group,  1720 North First Street,  San Jose,  California
95112-4598. All such communications are sent directly to the intended recipient.

Can I make comments and/or ask questions during the Annual Meeting?

Yes, most certainly.  Stockholders wishing to address the meeting are welcome to
do so by adhering to the following guidelines:

1.       Stockholders may address the meeting when recognized by the Chairman or
         President and Chief Executive Officer.

2.       Each stockholder, when recognized, should stand and identify himself or
         herself.

3.       Stockholder  remarks must be limited to matters  before the meeting and
         may not exceed 2 minutes in duration per speaker. No cameras,  video or
         recording equipment will be permitted at the meeting.

8 California Water Service Group


BOARD STRUCTURE

This section  briefly  describes the structure of the board and the functions of
the principal committees of the Board. The charters for the Audit, Compensation,
Finance and Nominating/Corporate Governance committees are posted on the Group's
website at  http://www.calwatergroup.com.  The Audit  Committee  charter is also
attached as Appendix A to this proxy statement.  The charters are also available
in written form upon request to Dan L. Stockton, Corporate Secretary, California
Water Service Group, 1720 North First Street, San Jose, California 95112-4598.

The Group's  policy is that all  directors  must be able to devote the  required
time to carry out director  responsibilities  and should  attend all meetings of
the Board and of Committees on which they sit.

Committees:

AUDIT:  Reviews  the  Group's  auditing,  accounting,  financial  reporting  and
internal audit  functions.  Also, the Committee is directly  responsible for the
appointment,  compensation  and oversight of the independent  registered  public
accounting  firm,  although  stockholders  are asked to ratify  the  Committee's
selection.  All members are nonemployee directors, are independent as defined in
the listing  standards of the New York Stock  Exchange  and meet the  additional
independence   requirements   for  audit   committee   members  imposed  by  the
Sarbanes-Oxley Act and the rules of the SEC thereunder. The Group has not relied
on any  exemptions  in the SEC's  rules  from the audit  committee  independence
requirements.

The Board has determined that George A. Vera, chair of the Audit Committee, is a
financial  expert and is  independent  as defined in the rules of the SEC and in
the listing standards of the New York Stock Exchange.  This means that the Board
believes Mr. Vera has:

         (i)   an understanding of generally accepted accounting  principles and
               financial statements;

         (ii)  the ability to assess the general  application of such principles
               in connection  with the accounting  for  estimates,  accruals and
               reserves;

         (iii) experience preparing, auditing, analyzing or evaluating financial
               statements  that  present a breadth  and level of  complexity  of
               accounting  issues that are  generally  comparable to the breadth
               and  complexity  of issues that can  reasonably be expected to be
               raised  by  the  Group's  financial  statements,   or  experience
               actively   supervising  one  or  more  persons  engaged  in  such
               activities;

         (iv)  an understanding  of internal  control over financial  reporting;
               and

         (v)   an understanding of Audit Committee functions.

Designation of a person as an audit committee  financial  expert does not result
in the person being deemed an expert for any purpose, including under Section 11
of the Securities Act of 1933. The designation does not impose on the person any
duties,  obligations or liability  greater than those imposed on any other audit
committee  member  or any  other  director  and  does  not  affect  the  duties,
obligations or liability of any other member of the Audit  Committee or Board of
Directors.

COMPENSATION: Reviews the Group's executive and Director compensation,  employee
benefit plans and programs,  including  their  establishment,  modification  and
administration.  All members  are  nonemployee  directors  and  independent  as
defined in the listing standards of the New York Stock Exchange.

FINANCE:  Assists  the  Board  in  reviewing  the  Group's  financial  policies,
strategies and capital structure,  and makes reports and  recommendations to the
Board as the Committee deems advisable.  All members are nonemployee  directors
and  independent  as  defined  in the  listing  standards  of the New York Stock
Exchange.

NOMINATING/CORPORATE GOVERNANCE: Assists the Board by (i) identifying candidates
and nominating individuals qualified to become Board members and (ii) developing
and  recommending  a set of corporate  governance  principles  applicable to the
Group.  All members are nonemployee  directors and are independent as defined in
the listing standards of the New York Stock Exchange.

EXECUTIVE:  Has limited  powers to act on behalf of the Board whenever it is not
in session.  This Committee meets only as needed.  The Committee consists of two
nonemployee directors and two employee directors.

     During 2005,  there were 11 regular  meetings of the Board, six meetings of
the Audit Committee, two meetings of the Compensation Committee, two meetings of
the  Finance  Committee,  one  meeting  of the  Nominating/Corporate  Governance
Committee   and  no   meeting   of  the   Executive   Committee.   Each  of  the

                                                California Water Service Group 9

director-nominees  who served on the Board of California  Water Service Group in
2005  attended  at least  93% of all Board and  applicable  committee  meetings.
Collectively, they attended an average of 99% of all of the Board and applicable
committee meetings.

Independence of Directors

The  Board  has  adopted a  standard  of  director  independence.  The  standard
determines  that  a  director  is  independent  if he or  she  has  no  material
relationship,  whether commercial,  industrial, banking, consulting, accounting,
legal,  charitable or familial, with the Group, either directly or indirectly as
a partner,  stockholder or officer of an entity that has a material relationship
with the Group.

A director is not  independent if he or she fails the standard for  independence
in Section  303A of the New York Stock  Exchange  Listed  Company  Manual or the
Group's  independence  standards.  The following  relationships  or transactions
disqualify  a person  from being  considered  independent  under the  Exchange's
standards

o        receipt during any  twelve-month  period within the past three years by
         the person,  or by an immediate  family  member of the person,  of more
         than  $100,000  in  direct  compensation  from the  Group,  other  than
         director  or  committee  fees and  pension or other  forms of  deferred
         compensation for prior service;

o        the director or an immediate  family member is a current partner of the
         Group's  internal  or  external  auditor;  the  director  is a  current
         employee of such a firm;  the director's  immediate  family member is a
         current  employee of such a firm who  participates in the firm's audit,
         assurance  or tax  compliance  practice or the director or an immediate
         family member was in the last three years a partner or employee of such
         a firm and personally worked on the Group's audit;

o        employment of the director or of an immediate  family member within the
         last  three  years  as  an  executive   officer  of  a  company   whose
         compensation committee includes an executive officer of the Group;

o        being an  employee  or  having an  immediate  family  member  who is an
         executive officer of a customer or vendor or other party which has made
         payments  to or received  payments  from the Group of at least 2% or $1
         million,  whichever  is  greater,  of the  party's  consolidated  gross
         revenues, in any of the past three years.

The Board has determined that none of the following relationships, in itself, is
material for purposes of these standards:

o        being a residential customer of the Group;

o        being an executive officer or employee,  or being otherwise  affiliated
         with, a commercial  customer from which Cal Water's  consolidated gross
         revenues  in any of the last three  years are or were not more than the
         greater of (i) 1% of Cal Water's  consolidated  gross  revenues for the
         year or (ii) $500,000;

o        being an executive officer or employee of a supplier or vendor that has
         or had  consolidated  gross  revenues from the Group in any of the last
         three  years  of not  more  than the  lesser  of (i) 1% of Cal  Water's
         consolidated gross revenues for the year or (ii) $500,000;

o        having a 5% or greater ownership interest or similar financial interest
         in a supplier or vendor  that has or had  consolidated  gross  revenues
         from  the  Group in any of the last  three  years of not more  than the
         lesser of (i) 1% of Cal Water's  consolidated  gross  revenues for such
         year or (ii) $500,000;

o        being a director of any of the Group's subsidiaries.

If a director is eligible for treatment as an independent director under Section
303A  but  has a  relationship  with  the  Group  other  than  one of  the  five
relationships    described    above,    the   Board   of    Directors   or   the
Nominating/Corporate   Governance   Committee   will   review   the   facts  and
circumstances of the relationship and make a good faith determination whether it
considers   the   director   independent   in  light  of  the  purposes  of  the
Sarbanes-Oxley  Act of 2002 and the New York Stock  Exchange  Listing  standards
and, if it determines that the director is independent,  will disclose the basis
for its determination in the Group's proxy statement for its next Annual Meeting
of stockholders as required by applicable laws and regulation.

In making a determination  regarding  independence  of a director,  the Board of
Directors will consider, among other things, the materiality of the relationship
to the Group,  to the director,  and, if applicable,  to the  organization  with
which the director is affiliated.

The Board has  determined  that a majority  of the members of the Board meet the
standard and also are  "independent," as defined in the listing standards of the
New York Stock Exchange.

10 California Water Service Group


Director Qualifications

The Group seeks directors with the following specific qualifications:

o        shows evidence of leadership in his/her particular field;

o        has broad experience and exercises sound business judgment;

o        has expertise in an area of importance to Group and its subsidiaries;

o        is able to work in a collegial Board environment;

o        has the highest personal and professional ethics and integrity;

o        is  able  to  devote   the   required   time  to  carry  out   director
         responsibilities;

o        has the ability and willingness to contribute  special  competencies to
         Board activities, to include appointment to Board committees;

o        is free from conflicts of interest  which would  interfere with serving
         and acting in the best interests of the Group and its stockholders;

o        is  the  highest  caliber  individual  who  has  achieved  a  level  of
         prominence  in his or her career;  for example,  a CEO or highest level
         financial  officer of a  sizeable  corporation,  a director  of a major
         corporation, a prominent civic or academic leader, etc.

In addition,  Section 2.8 of the Group's bylaws  contains  requirements  which a
person must meet to avoid  conflicts  of interest  which would  disqualify  that
person from serving as a director.

Identification of Director Nominees

The Group identifies new director candidates by director  recommendations and by
the  use  of  search  firms  selected  by  the  Nominating/Corporate  Governance
Committee.

The Group  considers  nominees of  stockholders  in the same manner as all other
nominees.  The Group will consider director nominees recommended by stockholders
who adhere to the procedure  described  under  "Questions  and Answers About the
Proxy Materials and the Annual  Meeting--How can a stockholder propose a nominee
for the Board?" on page 7.

Executive Sessions of the Board

As required by the listing  standards of the New York Stock Exchange,  the Group
schedules  regular  executive  sessions of  directors  in which  directors  meet
without  management  participation.  Mr.  Douglas M. Brown has been appointed to
chair these sessions.

Corporate Governance Guidelines

The Board has adopted corporate governance  guidelines as defined by the listing
standards  of the New York  Stock  Exchange.  The  guidelines  are posted on the
Group's  website  at  http://www.calwatergroup.com.   The  guidelines  are  also
available in written form upon request to Dan L. Stockton,  Corporate Secretary,
California Water Service Group,  1720 North First Street,  San Jose,  California
95112-4598.

                                               California Water Service Group 11


Director Compensation Arrangements

The  following  table  provides  information  on the  Group's  compensation  and
reimbursement  practices during fiscal year 2005 for nonemployee  directors,  as
well as the range of  compensation  paid to  nonemployee  directors  who  served
during the 2005 fiscal year.  Directors who are employed by the Group receive no
compensation  for their Board  activities  except a fee for attending each Board
meeting.  Directors receive no additional compensation for serving on the Boards
of the Group's subsidiaries.

Director Compensation Table For Fiscal Year 2005

Annual Director Retainer                                                 $22,000
Board and Committee Meeting Attendance Fee                                $1,400
Committee Meeting Attendance Fee for Committee Chairs                     $2,800
Range of Committee Meeting Attendance Fees Paid to Directors    $4,200 - $18,200

Compensation.  In 2005,  each director  received an annual  retainer of $22,000.
Effective January 1, 2006,  nonemployee directors are paid an annual retainer of
$23,500 and a meeting attendance fee of $1,500, and nonemployee committee chairs
are paid a meeting  attendance fee of $3,000.  The Audit Committee Chair is paid
an annual retainer of $8,500.

Deferred  Compensation  Plan. The Group has  established  the  California  Water
Service Group  Deferred  Compensation  Plan, an unfunded  deferred  compensation
program for nonemployee  directors,  executive officers and managers.  Under the
plan, nonemployee directors may defer up to 100% of their annual retainer with a
minimum annual deferral of $5,000. The plan also allows nonemployee directors to
defer 100% of their meeting and committee  meeting fees.  Directors who are also
executive  officers may defer 100% of their  meeting fees and up to 50% of their
annual salary with a minimum annual deferral of $5,000. Other executive officers
and managers who elect to  participate  in the plan may defer up to 50% of their
annual salary,  with a minimum  deferral of $5,000.  Amounts  deferred are fully
vested  and  recorded  by the  Group as  general  liabilities  and the  value of
deferrals  fluctuate  according to one of several investment indices selected by
the  participant.  Funds are  distributed  from  this plan when the  participant
ceases to be a director  (unless the  participant is an employee,  in which case
distribution  occurs  when  employment   terminates).   Distributions  also  are
available upon a showing of hardship.  Amounts remaining  undistributed at death
are distributed to the  participant's  designated  beneficiary or beneficiaries.
The Group is under no  obligation to make any  investment or otherwise  fund the
plan. Participants are general, unsecured creditors of the Group.

Retirement Age of Directors.

The Group has established a mandatory  retirement age for directors.  A director
must  retire no later  than the  Annual  Meeting  that  follows  the date of the
director's 75th birthday.  An employee  director must retire as an employee or a
director  no  later  than  the  Annual  Meeting  that  follows  the  date of the
director's 70th birthday.

Director Retirement Plan.

Any current  nonemployee  director who retires  subsequent to February 22, 2006,
after  serving  on the Board for a total of five or more  years  will  receive a
retirement benefit equivalent to $22,000 per year. This benefit will be paid for
the number of years the director served on the Board, up to 10 years. Retirement
benefit payments will be made monthly at the same time as retainer  payments are
made to active  directors.  In December 2005, the Director  Retirement  Plan was
cancelled for future directors.

Annual Meeting Attendance.

All  directors  are  expected  to attend  each  Annual  Meeting  of the  Group's
stockholders,  unless attendance is prevented by an emergency.  Except for Linda
R. Meier, all of the Group's  directors who were in office at that time attended
the Group's 2005 Annual Meeting of stockholders.

12 California Water Service Group


PROPOSAL NO. 1--ELECTION OF DIRECTORS

There are nine nominees for election to our Board this year. All of the nominees
have served as directors  since the last Annual Meeting.  Information  regarding
the business  experience  of each nominee is provided  below.  All directors are
elected  annually  to serve  until  the next  Annual  Meeting  and  until  their
respective successors are elected.(1)

Vote Required

The  nine  persons   receiving  the  highest  number  of  votes  represented  by
outstanding  shares present or represented by proxy and entitled to vote will be
elected.  Except as otherwise  indicated,  each director has served for at least
five years in the positions stated below.

The  Board  of  Directors  recommends  a vote  FOR the  election  of each of the
following nominees:

Douglas M. Brown (3,5,6,9,12,13)
Director since 2001
Age 68

     Mr.  Brown,  a resident of the state of New Mexico,  is  Treasurer  for the
state of New Mexico.  From 1999 to 2005, he was  president  and chief  executive
officer of Tuition Plan  Consortium  and from 1990 to 1999, he was president and
chief  executive  officer  of  Talbot  Financial  Services.  He is also a former
trustee of  Stanford  University  and  former  regent of the  University  of New
Mexico.

Robert W. Foy (2,11)
Director since 1977
Age 69

     Mr. Foy is Chairman of the Board of California  Water Service Group and its
subsidiaries.  He was formerly  president and chief executive officer of Pacific
Storage Company, a diversified  transportation  and warehousing  company serving
Stockton, Modesto, Sacramento, San Jose, Vallejo, Auburn and Merced, California.
He has served as Chairman of  California  Water  Service  Group since January 1,
1996. He serves as a member of the San Jose State University College of Business
Advisory Board.

Edward D. Harris, Jr., M.D. (2,4,6, 8, 13)
Director since 1993
Age 68

     Dr. Harris is the George DeForest Barnett professor of medicine,  emeritus,
at Stanford  University Medical Center. He is the Academic Secretary to Stanford
University.  He  is  a  director  of  the  Genentech  Research  and  Educational
Foundation.  He is also the  executive  secretary  of  Alpha  Omega  Alpha,  the
National  Medical Honor  Society,  and editor of "The Pharos." He is a Master of
the American College of Rheumatology,  and a Fellow of both the American College
of Physicians and the Royal College of Physicians (London).

         [PHOTO]                [PHOTO]                   [PHOTO]
      Douglas M. Brown        Robert W. Foy       Edward D. Harris, Jr., M.D.

                                               California Water Service Group 13

PROPOSAL NO. 1--ELECTION OF DIRECTORS

Bonnie G. Hill  (4,6,13)
Director since 2003
Age 64

     Ms. Hill is the president of B. Hill  Enterprises,  LLC, a consulting  firm
specializing in corporate  governance and board  organization  and public policy
issues.  She is also  co-founder of Icon Blue, a brand marketing  company.  From
1997 to 2001,  she was  president  and chief  executive  officer of Times Mirror
Foundation and senior vice president,  communications and public affairs, of The
Los Angeles Times.  She is a director of AK Steel Holdings  Corp.,  Albertson's,
Inc.,  Hershey Foods Corp., Home Depot, Inc. and Yum Brands,  Inc. She is also a
director of the Los Angeles  Urban  League,  Goodwill  Industries of Greater Los
Angeles and the NASD Investor Education Foundation.


David N. Kennedy (4,5,13)
Director since 2003
Age 69

     Mr. Kennedy is retired from the State of California.  From 1983 to 1998, he
was  director of the  California  Department  of Water  Resources.  He is a life
member of the American  Society of Civil  Engineers.  In 1998, he was elected to
the National Academy of Engineering.

Richard P. Magnuson (2,3,4,5,6,10,13)
Director since 1996
Age 50

     Mr. Magnuson is a private venture  capitalist.  From 1984 to 1996, he was a
general partner of Menlo Ventures, a venture capital firm. He also is a director
of one privately held company.

Linda R. Meier (3,4,6,13)
Director since 1994
Age 65

     Ms. Meier is a director of Greater Bay  Bancorp,  the  Peninsula  Community
Foundation and a former board member of the National  Advisory Board of the Haas
Public Service  Center.  She is also a former member of the Board of Trustees of
the California Academy of Sciences,  the former chair of the Stanford University
Hospital  Board of  Directors  (1992-1997)  and a  former  trustee  of  Stanford
University (1984-1994).  She is the former chair of the Stanford Athletic Board,
current  chair  of the  Western  Regional  Advisory  Board of the  Institute  of
International  Education,  member  of the  National  Board of the  Institute  of
International Education and a board member of the Stanford Alumni Association.

     [PHOTO]              [PHOTO]            [PHOTO]                [PHOTO]
 Bonnie G. Hill     David N. Kennedy   Richard P. Magnuson      Linda R. Meier

14 California Water Service Group

PROPOSAL NO. 1--ELECTION OF DIRECTORS

Peter C. Nelson (2)
Director since 1996
Age 58

     Mr. Nelson is president  and chief  executive  officer of California  Water
Service Group and its  subsidiaries.  Before  joining  California  Water Service
Group in 1996, he was vice president, division operations (1994-1995) and region
vice president  (1989-1994) of Pacific Gas & Electric Company.  He is a director
of the California  Chamber of Commerce and Chair of the Chamber Water  Resources
Committee, and President of the National Association of Water Companies.


George A. Vera (3,5,7,13)
Director since 1998
Age 62

     Mr. Vera is vice  president  and chief  financial  officer of the David and
Lucile  Packard  Foundation.  Until  1997,  he was an audit  partner  at  Arthur
Andersen, LLP.


(1)      No nominee has any family  relationship  with any other nominee or with
         any executive officer of the Group. "Director since" date refers to the
         year the  nominee  first  was  elected  or  appointed  to the  Board of
         California Water Service Group or California Water Service Company,  as
         appropriate.

(2)      Member of Executive Committee

(3)      Member of Audit Committee

(4)      Member of Compensation Committee

(5)      Member of the Finance Committee

(6)      Member of Nominating/Corporate Governance Committee

(7)      Chair of the Audit Committee

(8)      Chair of the Compensation Committee

(9)      Chair of the Finance Committee

(10)     Chair of the Nominating/Corporate Governance Committee

(11)     Chair of the Executive Committee

(12)     Chair of Board's Executive Sessions

(13)     Independent director

            [PHOTO]                             [PHOTO]
        Peter C. Nelson                      George A. Vera

                                              California Water Service Group  15

STOCK OWNERSHIP OF MANAGEMENT AND CERTAIN BENEFICIAL OWNERS

Ownership of Directors and Executive Officers
(Common and Preferred Stock Ownership as of January 1, 2006)(1)

Name                                                               Shares Owned
--------------------------------------------------------------------------------
Douglas M. Brown                                                      2,000
Director
--------------------------------------------------------------------------------
Francis S. Ferraro                                                    1,746 (2)
Executive Officer
--------------------------------------------------------------------------------
Robert W. Foy                                                        37,461 (3)
Director and Executive Officer
--------------------------------------------------------------------------------
Robert R. Guzzetta                                                    9,261 (4)
Executive Officer
--------------------------------------------------------------------------------
Edward D. Harris, Jr., M.D.                                           1,695
Director
--------------------------------------------------------------------------------
Bonnie G. Hill                                                        1,500
Director
--------------------------------------------------------------------------------
David N. Kennedy                                                      1,800
Director
--------------------------------------------------------------------------------
Richard P. Magnuson                                                  18,954
Director
--------------------------------------------------------------------------------
Linda R. Meier                                                        3,000
Director
--------------------------------------------------------------------------------
Richard D. Nye                                                          131
Executive Officer
--------------------------------------------------------------------------------
Peter C. Nelson                                                      48,175 (5)
Director and Executive Officer
--------------------------------------------------------------------------------
George A. Vera                                                        2,040
Director
--------------------------------------------------------------------------------
All directors and executive officers as a group(6)                  151,930
--------------------------------------------------------------------------------

(1)      No director or executive  officer owns any shares of Series C preferred
         stock.  All  directors  and  executive  officers  have sole  voting and
         investment  power over their  shares (or share such  powers  with their
         spouses).  To the  knowledge of the Group,  as of January 1, 2006,  all
         directors  and  executive  officers  together   beneficially  owned  an
         aggregate of less than 1% of the Group's outstanding common shares.

(2)      Includes shares held in the Employees Savings Plan. Includes 750 shares
         outstanding   under  options  which  are   currently   exercisable   or
         exercisable within 60 days of January 1, 2006.

(3)      Includes  shares held in the Employees  Savings Plan.  Includes  28,000
         shares  outstanding  under options which are currently  exercisable  or
         exercisable within 60 days of January 1, 2006.

(4)      Includes  shares held in the  Employees  Savings Plan.  Includes  6,000
         shares  outstanding  under options which are currently  exercisable  or
         exercisable within 60 days of January 1, 2006.

(5)      Includes  shares held in the Employees  Savings Plan.  Includes  42,500
         shares  outstanding  under options which are currently  exercisable  or
         exercisable within 60 days of January 1, 2006.

(6)      Includes  shares held in the Employees  Savings Plan for the benefit of
         executive  officers.  Includes 98,250 shares  outstanding under options
         which  are  currently  exercisable  or  exercisable  within  60 days of
         January 1, 2006.

16 California Water Service Group



OWNERSHIP OF LARGEST PRINCIPAL STOCKHOLDERS

The following  table shows the largest  principal  holders of the Group's voting
securities as of January 1, 2006:

Class       Beneficial Owner               Number of Shares    Percent of Class
--------------------------------------------------------------------------------
Common      SJW Corp.(1)                      1,099,952             6.3%
            374 W. Santa Clara Street
            San Jose, CA 95196



(1)      SJW Corp. has sole voting and investment power over these shares.



SECTION 16(A) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

Section 16(a) of the  Securities  Exchange Act of 1934,  requires our directors,
certain officers,  and holders of more than 10% of our common stock to file with
the Securities and Exchange  Commission reports regarding their ownership of our
securities.  Based solely on its review of the copies of forms  furnished to the
Group,  or  written  representations  that no  annual  forms  (SEC  Form 5) were
required,  the Group believes that during 2005, all SEC Section 16(a) filings of
the officers,  directors and 10-percent  stockholders of the Group complied with
requirements for reporting stock ownership.

                                               California Water Service Group 17

EXECUTIVE COMPENSATION

Summary Compensation Table
The  following  table  discloses  the  compensation  of the  president and chief
executive officer and our four other most highly paid executive officers for the
three years ended December 31, 2005.


                                                                                       Long Term
                                                 Annual Compensation                 Compensation
                                                 -------------------                 ------------
                                                            Other Annual          Securities Underlying       All Other
Name and Principal Position          Year      Salary(1)    Compensation          Options/SAR's (#) (12)     Compensation
--------------------------------------------------------------------------------------------------------------------------
                                                                                               
Peter C. Nelson                      2005      $621,928       $15,400 (2)                 --                  $9,336 (3)
President and Chief                  2004       561,543        14,300 (2)                                      8,336 (4)
Executive Officer                    2003       514,066        13,750 (2)                                      7,336 (5)
--------------------------------------------------------------------------------------------------------------------------
Robert W. Foy                        2005      $347,441       $15,400 (2)                 --                  $9,336 (3)
Chairman of the Board                2004       330,469        14,300 (2)                                      8,336 (4)
                                     2003       306,552        13,750 (2)                                      7,336 (5)
--------------------------------------------------------------------------------------------------------------------------
Francis S. Ferraro                   2005      $287,900            --                     --                  $8,132 (6)
Vice President, Regulatory           2004       262,110                                                        8,248 (7)
Matters and Corporate Relations      2003       237,355                                                        7,336 (5)
--------------------------------------------------------------------------------------------------------------------------
Richard D, Nye(13)                   2005      $289,180            --                     --                  $9,336 (3)
Vice President, Chief Financial      2004       258,016                                                       $6,836 (8)
Officer and Treasurer                2003       172,757                                                        6,196 (9)
--------------------------------------------------------------------------------------------------------------------------
Robert R. Guzzetta                   2005      $229,854            --                     --                  $8,967(10)
Vice President, Operations           2004       216,809                                                        8,336 (4)
                                     2003       197,307                                                        6,336(11)
--------------------------------------------------------------------------------------------------------------------------


FOOTNOTES TO SUMMARY COMPENSATION TABLE

(1)      Includes salary,  amounts deferred under the Employees Savings Plan and
         compensation   associated  with  the  non-business  use  of  a  company
         automobile.  The value of automobile  use amounted to $7,090,  $17,045,
         $10,772,  $9,388 and $5,416 for Messrs.  Nelson, Foy, Ferraro,  Nye and
         Guzzetta, respectively.

(2)      Director meeting fees.

(3)      Includes Employees Savings Plan contributions of $9,000 and annual life
         insurance premiums of $336.

(4)      Includes Employees Savings Plan contributions of $8,000 and annual life
         insurance premiums of $336.

(5)      Includes Employees Savings Plan contributions of $7,000 and annual life
         insurance premiums of $336.

(6)      Includes Employees Savings Plan contributions of $7,796 and annual life
         insurance premiums of $336.

(7)      Includes Employees Savings Plan contributions of $7,912 and annual life
         insurance premiums of $336.

(8)      Includes Employees Savings Plan contributions of $6,500 and annual life
         insurance premiums of $336.

(9)      Includes Employees Savings Plan contributions of $6,000 and annual life
         insurance premiums of $196.

(10)     Includes Employees Savings Plan contributions of $8,631 and annual life
         insurance premiums of $336.

(11)     Includes Employees Savings Plan contributions of $6,000 and annual life
         insurance premiums of $336.

(12)     Options grants were not awarded for 2003, 2004, and 2005.

(13)     Mr. Nye left the Group effective October 27, 2005.


SEVERANCE   AGREEMENTS  In  1998,  we  entered  into  executive  severance  plan
agreements with all officers.  These agreements  provide officers with severance
payments of  approximately  three times their annual  salary if the Group merges
with another  company or effects  another  transaction by which another  company
acquires  control and as a result,  within 24 months,  these officers lose their
executive  positions.  This severance amount would be paid in three equal annual
payments, beginning the month following termination.

18 California Water Service Group


SEPARATION  AGREEMENT  Richard D. Nye,  former  Chief  Financial  Officer of the
Company,  submitted his resignation from the Company effective October 27, 2005.
Mr.  Nye's  Separation  Agreement  and Release  dated as of December  15,  2005,
provides, among other terms, as follows:

o        payment to Mr.  Nye,  previously  made on October  28,  2005,  of final
         salary through  October 27, 2005, plus six weeks unused  vacation,  and
         one week salary as termination wages;

o        payment in the amount of $137,500  minus  applicable  tax  withholding,
         equivalent to six months'  salary,  payable upon Mr. Nye's request made
         by March 31, 2006;

o        continuing  entitlement to any benefits accrued as of October 27, 2005,
         under the Company's  pension plan,  supplemental  executive  retirement
         plan,  and deferred  compensation  plan.  Mr. Nye was hired on March 1,
         2003,  and as such,  has not  vested  in the  pension  or  supplemental
         executive  retirement  plan under the vesting  terms of the  respective
         plans.  Benefits accrued Mr. Nye under the deferred  compensation  plan
         were solely contributed to the plan by Mr. Nye;

o        payment of Mr. Nye's current medical  insurance  premiums for 12 months
         in the aggregate amount of $6,795, less tax withholding;

o        allowing  Mr.  Nye to  purchase a  Company-owned,  2003  Toyota  Avalon
         automobile,  at a price of $17,000, which was more than trade-in value;
         and

o        the  agreement  also contains a release of any liability of the Company
         to Mr. Nye.


OPTION/SAR GRANTS IN 2005 Option grants were not awarded for 2005.

AGGREGATED  OPTION/SAR  EXERCISES  IN 2005 AND 2005 FISCAL  YEAR-END  OPTION/SAR
VALUES The  following  table  shows  2005  fiscal  year-end  number and value of
unexercised  options held by the president and chief  executive  officer and our
four  other most  highly  paid  executive  officers.  There  were 4,500  options
exercised by such persons during 2005.


                                                                Number of Securities          Value of Unexercised
                                Shares                         Underlying Unexercised             In-the-Money
                              Acquired on         Value        Options/SARs at FY-End      Options/SARs at FY-End ($)
Name                            Exercise         Realized     Exercisable/Unexercisable     Exercisable/Unexercisable
----------------------------------------------------------------------------------------------------------------------
                                                                                    
Peter C. Nelson
President and Chief                                                 38,750/3,750                $521,131/$49,050
Executive Officer
----------------------------------------------------------------------------------------------------------------------
Robert W. Foy                                                       25,500/2,500                $342,365/$32,700
Chairman of the Board
----------------------------------------------------------------------------------------------------------------------
Francis S. Ferraro               1,500            $21,702                0/750                         $0/$9,810
Vice President, Regulatory
Matters and
Corporate Relations
----------------------------------------------------------------------------------------------------------------------
Richard D. Nye                                                           0/0                               $0/$0
Vice President, Chief
Financial Officer and
Treasurer
----------------------------------------------------------------------------------------------------------------------
Robert R. Guzzetta                3,000            56,031            5,250/750                    $66,307/$9,810
Vice President, Operations
----------------------------------------------------------------------------------------------------------------------


                                               California Water Service Group 19


EQUITY  COMPENSATION PLAN INFORMATION The following table sets forth information
about the number of options  previously  granted and  outstanding and the number
available for future  grants.  The number of  securities  issuable upon exercise
reflects options  outstanding  under the former  Long-Term  Incentive Plan. That
plan was replaced by the Group's Equity  Incentive  Plan,  which was approved by
the  stockholders  at their Annual Meeting held on April 27, 2005. The number of
securities remaining available for future issuance reflects shares available for
grant under the Equity  Incentive  Plan as of December 31, 2005,  the end of the
Group's  last  fiscal  year.


                                                                                                                    (c)
                                                     (a)                        (b)      Number of securities remaining
                              Number of securities to be           Weighted-average       available for future issuance
                                 issued upon exercise of          exercise price of           under equity compensation
                                    outstanding options,       outstanding options,          plans (excluding securitie
        Plan category                warrants and rights        warrants and rights            reflected in column (a))
------------------------------------------------------------------------------------------------------------------------
                                                                                          
Equity compensation plans                    98,000                   $ 24.95                      1,000,000
 approved by stockholders
------------------------------------------------------------------------------------------------------------------------
Equity compensation plans not                 None                      None                         None
approved by stockholders
------------------------------------------------------------------------------------------------------------------------
Total                                        98,000                   $ 24.95                      1,000,000 (1)
------------------------------------------------------------------------------------------------------------------------


(1)  On January 4, 2006,  the Group granted stock  appreciation  rights  (37,500
     shares) and  restricted  stock (9,142  shares)  under the Equity  Incentive
     Plan,  which  reduces the number of shares  available  for future  grant to
     953,358 shares.


PENSION PLANS The table1 that follows shows the  estimated  annual  benefits the
Group must pay upon  retirement to executive  officers under the Group's Pension
Plan and Supplemental  Executive Retirement Plan ("SERP").  The SERP is designed
to provide  executive  officers a pension  benefit  which when combined with the
regular  pension  plan  benefit  would equal the pension  benefit  that would be
provided if the regular  Pension Plan's  benefit were  unaffected by the federal
tax law restrictions on retirement plan benefits.  The years of service required
to earn maximum benefit under the SERP is 15 years.

     Three Highest Consecutive
   Years Average Compensation(2)    5 Years     10 Years      15 Years
   -----------------------------    -------     --------      --------
          $ 200,000                $  40,000   $  80,000     $ 120,000
            250,000                   50,000     100,000       150,000
            300,000                   60,000     120,000       180,000
            350,000                   70,000     140,000       210,000
            400,000                   80,000     160,000       240,000
            450,000                   90,000     180,000       270,000
            500,000                  100,000     200,000       300,000
            550,000                  110,000     220,000       330,000
            600,000                  120,000     240,000       360,000
            700,000                  140,000     280,000       420,000
            750,000                  150,000     300,000       450,000


(1)      The pension table above shows  estimated  annual  retirement  benefits,
         payable as a straight  life  annuity,  assuming  retirement  at age 60,
         using the normal form of benefits  under the above plans.  The benefits
         are not subject to any deductions  for Social  Security or other offset
         amounts.

(2)      Compensation  includes salary as set forth in the Summary  Compensation
         Table.  The number of years of credited service at January 1, 2006, for
         officers named in the Compensation Table is as follows: Mr. Nelson, 25;
         Mr. Foy, 25; Mr. Ferraro, 16; Mr. Nye, 2; and Mr. Guzzetta, 28. Because
         Mr. Nye had not vested in the Group's Pension Plan and SERP at the time
         he left the Group, he is not entitled to benefits under either of these
         two plans.

20 California Water Service Group

REPORT OF THE COMPENSATION COMMITTEE OF THE BOARD OF DIRECTORS
ON EXECUTIVE COMPENSATION

What is this report?

The Securities and Exchange  Commission  requires that public companies disclose
the policies that the Group uses to establish  executive  officer  compensation.
This  report  explains  the  criteria  that  the  Group  used to  determine  the
compensation of all of its officers in 2005.

What are the Compensation Committee's responsibilities?

The Committee is responsible  for  establishing  and  implementing  policies and
programs to compensate  Group  executives  and  Directors.  Each  November,  the
Committee reviews and recommends  compensation levels for all executive officers
for the 12-month  period  beginning  January 1. The  Committee  then submits its
recommendations  to the entire Board. In 2005, the Board adopted the Committee's
recommendations without modification. During 2005, the Committee met twice.

What is our compensation philosophy?

The primary objectives of our executive compensation program are:

     1)   To attract, retain, and motivate talented and experienced executives;

     2)   To reward  excellent job performance and  contributions to the Group's
          future success;

     3)   To provide fair and reasonable compensation.

The Compensation Committee believes that compensating executives by use of these
criteria leads to excellent executive  performance,  which benefits stockholders
and ratepayers alike. When making its recommendations,  the Committee takes into
account that the California  Public  Utilities  Commission  ("CPUC") reviews the
compensation decisions of the Group's officers for reasonableness.  Furthermore,
as a regulated utility,  the Group's financial  performance is to a large extent
dependent upon CPUC ratemaking  decisions and other factors beyond  management's
control,  such as weather.  Therefore,  the Committee's decisions are determined
largely by its evaluation of factors that are within management's control.

Who serves on the Compensation Committee?

The  Compensation  Committee is composed of Dr. Harris  (Committee  Chair),  Ms.
Hill, Mr. Kennedy,  Mr. Magnuson and Ms. Meier.  All members of the Compensation
Committee meet the  independence  standard adopted by the Board and the New York
Stock Exchange standard for independence.

How is executive compensation determined?

When examining the annual compensation of individual  executives,  the Committee
considers the officer's  duties,  performance  and  contribution  to the Group's
current  and  future  success.   The  Committee  also  considers  the  officer's
experience,  tenure,  value  to the  Group,  prior  salary  adjustments  and the
inflation rate.

     In order to set  salaries  for the  Group's  officers  at  competitive  and
reasonable  levels,  the Committee annually reviews the compensation of officers
of other major water  companies.  The  Committee  factors  into its analysis the
Group's  comparatively  low  number  of  officers  and its  limited  methods  of
compensation.

     Mr.  Nelson's  Compensation.  In November 2004, the Committee  reviewed the
compensation  for Peter C. Nelson,  president and chief executive  officer.  The
Committee set Mr. Nelson's 2005 compensation using the same factors that it used
to set the compensation of the other Group executives.

                                               California Water Service Group 21

REPORT OF THE COMPENSATION COMMITTEE OF THE BOARD OF DIRECTORS
ON EXECUTIVE COMPENSATION

Does the Group have a Long-Term Incentive Plan?

Yes.  Stockholders  of the Group approved an Equity  Incentive Plan at the April
27, 2005 Annual Meeting.  This plan replaced the former Long-Term Incentive Plan
which was approved by the stockholders at the April 19, 2000, meeting.  The plan
allows the Group to offer  competitive  compensation to assist in recruiting and
retaining  top-performing  individuals.  The plan also aligns the  interests  of
stockholders and participants.  Finally, the plan provides the potential to link
benefits  to  the  Group's  achievement  of  stockholder,   customer  and  other
performance goals, giving participants an incentive to achieve these goals.

Who determines the amount and type of award granted?

The Equity  Incentive  Plan is  administered  by the Board of  Directors  of the
Group.  The Board has the power to construe and interpret the plan and,  subject
to the provisions of the plan, to determine the persons to whom and the dates on
which awards will be granted,  the number of shares to be subject to each award,
the time or times during the term of each award within which all or a portion of
the award may be exercised,  the exercise price, the type of consideration,  and
other terms of the award.

The Board of Directors is  authorized to delegate  administration  of the Equity
Incentive Plan to a committee composed of one or more of its members.  The Board
of Directors also is authorized to delegate to one or more officers of the Group
the  authority to designate  employees  of the Group or its  affiliates  to whom
stock  awards will be granted  (other than  themselves),  and to  determine  the
number  of shares to be  subject  to that  award.  The  Board of  Directors  has
delegated  administration  of the  Equity  Incentive  Plan  to the  Compensation
Committee  of the  Board of  Directors.  As used in this  proxy  statement  with
respect to the Equity  Incentive  Plan, the "Board"  refers to the  Compensation
Committee as well as to the Board of Directors itself.

In addition, the Equity Incentive Plan provides that, in the Board's discretion,
directors  who grant options to employees  covered  under Section  162(m) of the
Internal Revenue Code ("Section 162(m)")  generally will be "outside  directors"
as defined in Section  162(m).  See "How have we  responded to the IRS limits on
deductibility  of  compensation?"  below for a discussion of the  application of
Section 162(m).

The Equity Incentive Plan provides for the following types of awards:  incentive
stock  options,   nonqualified   (or   "nonstatutory")   stock  options,   stock
appreciation rights,  restricted stock awards, restricted stock units, and other
stock awards.

Were awards made under the Equity Incentive Plan for 2005?

No. Awards were not made for 2005.

Does the Group have an Executive Severance Plan?

Yes.  Effective  December 16, 1998, the Board of Directors  adopted an Executive
Severance  Plan for the benefit of the  officers of Group and its  subsidiaries.
The Board  adopted  the plan,  in the event of a change in  control,  to provide
effective  leadership during a transition period.  Prior to a change in control,
the plan also would  facilitate a transaction  that is in the best  interests of
the  Group and its  stockholders,  and  provide  some  measure  of  security  to
management in the event their  employment  is  terminated  following a change in
control.

22 California Water Service Group

REPORT OF THE COMPENSATION COMMITTEE OF THE BOARD OF DIRECTORS
ON EXECUTIVE COMPENSATION

How have we responded to the IRS limits on deductibility of compensation?

The  Committee  has  reviewed  the Group's  compensation  structure  in light of
Section  162(m)  of the  Internal  Revenue  Code,  which  limits  the  amount of
compensation that the Group may deduct in determining its taxable income for any
year to  $1,000,000  for  any of its  five  most  highly  compensated  executive
officers.  In 2005, no executive officer's  compensation exceeded the limitation
set by Section 162(m).

Compensation Committee:
Edward D. Harris, Jr., M.D., Committee Chair
Bonnie G. Hill
David N. Kennedy
Richard P. Magnuson
Linda R. Meier

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

No member of the Compensation  Committee was an officer or employee of the Group
or any of its  subsidiaries  during 2005. None of the executive  officers of the
Group has served on the Board of Directors or on the  Compensation  Committee of
any other entity,  any of whose officers served either on the Board of Directors
or on the Compensation Committee of the Group.

                                               California Water Service Group 23


AUDIT COMMITTEE

REPORT OF THE AUDIT COMMITTEE

The Audit Committee  oversees the Group's financial  reporting process on behalf
of the Board of Directors.  The Committee's purpose and responsibilities are set
forth in the Audit Committee Charter. The current charter is printed in Appendix
A of this Proxy Statement.  The Committee consists of four members, each of whom
meets  the  New  York  Stock  Exchange   standards  for   independence  and  the
Sarbanes-Oxley Act independence  standards for audit committee  membership,  and
has at least one member meeting the requirements of a financial  expert.  During
2005, the Committee met six times.

     The Group's management has primary responsibility for preparing the Group's
financial  statements and the overall reporting  process,  including the Group's
system of internal controls. KPMG LLP, the Group's independent registered public
accounting  firm,  audited the  financial  statements  prepared by the Group and
expressed their opinion that the financial statements present fairly the Group's
financial  position,  results of operations  and cash flows in  conformity  with
generally accepted  accounting  principles.  KPMG LLP also audited  management's
assessment that the Group maintained  effective  internal control over financial
reporting as of December 31, 2005, and expressed their opinion that management's
assessment  is  fairly  stated,  in all  material  respects,  and that the Group
maintained, in all material respects,  effective internal control over financial
reporting as of December 31, 2005.

     In connection with the December 31, 2005, financial  statements,  the Audit
Committee:

     (1)  reviewed  and  discussed  the  audited   financial   statements   with
          management and the independent registered public accounting firm;

     (2)  discussed with the independent  registered  public accounting firm the
          matters   required  by  Statement  on  Auditing   Standards   No.  61,
          "Communication with Audit Committees;"

     (3)  received  from  KPMG  LLP  and  discussed  with  the  auditor  written
          disclosures required by the Independence  Standards Board Standard No.
          1,  "Independence  Discussions  with Audit  Committees;" the Committee
          also discussed with KPMG LLP the firm's  independence,  and considered
          whether the firm's  provision of  non-audit  services and the fees and
          costs  billed  for those  services  are  compatible  with  KPMG  LLP's
          independence; and

     (4)  met  privately  with  the  Group's   independent   registered   public
          accounting firm and internal  auditors,  each of whom has unrestricted
          access  to  the  Audit  Committee,  without  management  present,  and
          discussed  their  evaluations  of the Group's  internal  controls  and
          overall  quality of the Group's  financial  reporting  and  accounting
          principles used in preparation of financial statements.  The Committee
          also met  privately  with the Group's  Chairman and the  President and
          Chief  Executive   Officer,   the  Chief  Financial  Officer  and  the
          Controller to discuss the same issues.

Based upon these reviews and discussions, the Audit Committee recommended to the
Board of  Directors  that the audited  financial  statements  be included in the
Annual  Report  on Form  10-K to be  filed  with  the  Securities  and  Exchange
Commission.

AUDIT COMMITTEE
George A. Vera, Committee Chair
Douglas M. Brown
Richard P. Magnuson
Linda R. Meier

24 California Water Service Group


Relationship with the independent registered public accounting firm

The Audit  Committee has selected  KPMG LLP to serve as the Group's  independent
registered  public  accounting  firm for the year ending  December 31, 2006. The
Committee's  selection of KPMG LLP as independent  registered  public accounting
firm is submitted for  ratification by vote of the  stockholders at their Annual
Meeting.

---------------------------- ------------------------- -------------------------
Category of Services             Fiscal Year 2004          Fiscal Year 2005
---------------------------- ------------------------- -------------------------
Audit Fees (1)                       $766,000                   $645,500
---------------------------- ------------------------- -------------------------
Audit-Related Fees (2)                 50,000                          0
---------------------------- ------------------------- -------------------------
Tax Fees (3)                                0                          0
---------------------------- ------------------------- -------------------------
Subtotal                             $816,000                   $645,500
---------------------------- ------------------------- -------------------------
All Other Fees (4)                         $0                         $0
---------------------------- ------------------------- -------------------------

(1)  The audit services  included  audits of California  Water Service Group and
     California Water Service Company annual  financial  statements for the year
     ended  December  31, 2004 and 2005,  and  quarterly  reviews of the Group's
     interim  financial  statements.  Included  for the year ended  December 31,
     2005, are fees related to the audit of management's  assessment of internal
     control  over  financial  reporting  and an audit of the  effectiveness  of
     internal control over financial reporting.

(2)  Services  include  assurance  and related  services by the auditor that are
     reasonably related to the performance of the audit or review of the Group's
     financial statements and are not reported under "Audit Fees."

(3)  Services include tax compliance, tax advice, and tax planning.

(4)  Services include other services (and products)  provided by the independent
     registered  public  accounting firm, other than the services reported above
     in this table.

Fees  reported in the above table  relate to that fiscal year and were  incurred
either during the fiscal year or in the quarter following the fiscal year end.

All non-audit services provided by the independent  registered public accounting
firm are  subject to  preapproval  by the Audit  Committee,  as described in the
Audit Committee Charter, Appendix A of this proxy statement.

                                               California Water Service Group 25


Performance Graph

The graph below shows a five-year comparison of cumulative total returns for the
Group,  the S&P 500 Utilities Index, and the AG Edwards Water Utility Average of
11 companies.



                                [LINE CHART OMMITTED]





                                  2000   2001    2002    2003    2004     2005
California Water Service Group     100    100      96     116     165      174
S&P 500 Utilities Index            100     68      45      55      66       74
AG Edwards Water Utility Index     100    125     124     151     162      188


Past stock performance is not necessarily indicative of future performance.
Data provided courtesy of AG Edwards, Inc.

26 California Water Service Group



PROPOSAL NO.  2--RATIFICATION OF SELECTION OF KPMG LLP AS INDEPENDENT REGISTERED
PUBLIC ACCOUNTING FIRM FOR 2006

Stockholders  will  vote on the  ratification  of the  selection  of  KPMG  LLP,
certified public accountants,  to audit the Group's books,  records and accounts
for the year ending December 31, 2006. Following the recommendation of the Audit
Committee,  the  Board  recommends  a vote FOR the  adoption  of this  proposal.
Representatives  of KPMG LLP will be present at the meeting to answer  questions
and will have an opportunity to make a statement if they desire to do so. If the
stockholders do not ratify this appointment, the Audit Committee will reconsider
the selection of the independent registered public accounting firm.

Vote Required

In order for the  ratification  of the selection of the  independent  registered
public accounting firm to be approved, it must receive the affirmative vote of a
majority of the shares present in person or represented by proxy and entitled to
vote at the meeting.

The Board urges you to vote FOR this proposal.

                                               California Water Service Group 27


CERTAIN TRANSACTIONS

Cal Water provides  laboratory  services to a subsidiary of SJW Corp., which has
ownership  of over 6% of the common  stock  outstanding.  The rates  charged are
comparable  to rates  charged to other third  parties.  The revenue for 2005 was
approximately $0.1 million. The revenue and income from these activities are not
significant to our business.

OTHER MATTERS

Adjournment. Notice of adjournment need not be given if the date, time and place
thereof are announced at the Annual  Meeting at which the  adjournment is taken.
However, if the adjournment is for more than 30 days, or if a new record date is
fixed for the adjourned Annual Meeting, a notice of the adjourned Annual Meeting
will be given to each  stockholder  entitled to vote at the Annual  Meeting.  At
adjourned Annual Meetings,  any business may be transacted which might have been
transacted at the original Annual Meeting.

Cost of proxy  solicitation.  The Group will bear the entire cost of  preparing,
assembling,  printing  and  mailing  this proxy  statement,  the proxies and any
additional  materials which may be furnished by the Board to  stockholders.  The
solicitation  of proxies will be made by the use of the U.S.  postal service and
also may be made by telephone, or personally, by directors, officers and regular
employees  of the  Group,  who  will  receive  no  extra  compensation  for such
services.  Morrow  & Co.  was  hired  to  assist  in the  distribution  of proxy
materials and solicitation of votes for $9,000, plus out-of-pocket expenses. The
Group  will  reimburse  brokerage  houses  and other  custodians,  nominees  and
fiduciaries for their reasonable out-of-pocket expenses for forwarding proxy and
solicitation materials to stockholders.

Other  matters.  The Board is not aware of any matters to come before the Annual
Meeting  other  than  the  proposals  for  the  election  of  directors  and the
ratification of the selection of the independent  registered  public  accounting
firm.  If any  other  matters  should  be  brought  before  the  meeting  or any
adjournment thereof,  upon which a vote properly may be taken, the proxy holders
will vote in their  discretion  unless  otherwise  provided in the proxies.  The
Report of the Compensation  Committee,  the Report of the Audit  Committee,  the
Performance  Graph, the Audit Committee  Charter contained in Appendix A to this
proxy statement and the statement of  independence  of Audit  Committee  members
referred to under "Board  Structure-Committees:  Audit" are not to be considered
as  incorporated  by reference into any other filings which the Group makes with
the  Securities  and Exchange  Commission  under the  Securities Act of 1933, as
amended, or the Securities  Exchange Act of 1934, as amended.  These portions of
this proxy  statement  are not a part of any of those filings  unless  otherwise
stated in those filings.

Code of ethics.  The Group has adopted a written  code of ethics that applies to
its  principal  executive  officer,   principal  financial  officer,   principal
accounting officer or controller. The Group has also adopted codes of ethics for
its  employees  and  directors.  The codes are posted on the Group's  website at
http://www.calwatergroup.com.  The codes are also available in written form upon
request to Dan L. Stockton, Corporate Secretary, California Water Service Group,
1720 North First Street, San Jose, California 95112-4598.

28 California Water Service Group


Appendix A
California Water Service Group
Audit Committee Charter
(As adopted by the Board of Directors February 22, 2006)


I.  Purpose

The purpose of the Audit  Committee  of the Board of  Directors is to assist the
Board in  oversight  of the quality and  integrity  of the  Company's  financial
statements  and the Company's  compliance  with legal,  regulatory and reporting
requirements.   The  Committee  is  solely   responsible   for  the   selection,
qualifications and compensation of the Company's  Independent  Registered Public
Accounting Firm (IRPAF),  including  oversight and evaluation of Company's IRPAF
and internal audit function.

II.  Committee Membership

The Audit  Committee  shall be  comprised of three or more  directors  appointed
annually by the Board of  Directors.  Each  Committee  member shall  satisfy the
independence,  financial literacy and experience  requirements of the Securities
and  Exchange  Commission  ("SEC"),  the  New  York  Stock  Exchange  and  other
regulatory  bodies.  The Board of Directors  shall determine that each member is
free of any relationship  with the Company which, in the opinion of the Board of
Directors,  may interfere with the exercise of independent  judgement.  At least
one  member of the  Committee  shall have  accounting  or  financial  management
expertise, as required by the rules and regulations of the Exchange.

III.  Meetings

The  Audit   Committee   shall  meet  as  often  as  necessary  to  fulfill  its
responsibilities, but not less than quarterly. At least quarterly, the Committee
shall hold separate, private meetings with the Company's Chief Financial Officer
and Controller, and the Company's IRPAF. At least twice each year, the Committee
shall meet with  representatives  of the internal  audit firm.  Each such person
shall have free and direct access to the Committee and any of its members.

     The  Committee  shall meet only if a quorum is present.  The  presence of a
majority of the members will constitute a quorum.

     The Committee  shall  maintain a one-year  schedule of future meeting dates
including a preliminary agenda for each meeting.  Final meeting agendas shall be
drafted by the Committee Chair in consultation with the Chief Financial Officer,
the IRPAF and the internal auditor.

     Following  each Committee  meeting,  the Chair shall report to the Board of
Directors the Committee's activities, concerns, conclusions and recommendations,
reviewing  with the Board the broad  scope of issues  that may come  before  the
Committee  including  the  quality  or  integrity  of  the  Company's  financial
statements, the Company's compliance with legal or regulatory requirements,  the
performance  and  independence  of the Company's  IRPAF,  and performance of the
internal audit function.

IV. Authority of Committee

In  discharging  its  oversight  role and  responsibilities,  the  Committee  is
empowered to investigate  any matter brought to its attention or assigned by the
Board of Directors. The Committee may require Company personnel to assist in any
such  investigations,  and it is  empowered to engage and retain  outside  legal
counsel and other experts to assist in such  investigations  or other matters as
it deems necessary.

V.  Responsibilities of the Audit Committee

The Company's  management is responsible  for preparing the Company's  financial
statements and the IRPAF is responsible for auditing those financial statements.
In fulfilling these responsibilities, the IRPAF is ultimately accountable to the
Audit Committee, and management is ultimately accountable to the Audit Committee
and the Board of Directors.  The Audit Committee provides an oversight function.
This  Charter  should  not be  construed  to imply that the Audit  Committee  is
required to provide or does  provide any  assurance or  certification  as to the
Company's  financial  statements  or as to its  compliance  with laws,  rules or
regulations.  In  order to  fulfill  its  oversight  responsibility,  the  Audit
Committee  must  be  capable  of  conducting  free  and  open  discussions  with
management,  internal audit,  and the IRPAF,  employees and others regarding the
quality of the financial statements and the system of internal controls.

                                               California Water Service Group 29


To fulfill its responsibilities, the Audit Committee shall:

With Respect to the Independent Registered Public Accounting Firm:

     1.   Be  directly   responsible  for  the  appointment,   compensation  and
          oversight of the IRPAF, subject to stockholder ratification.

     2.   Review and evaluate the IRPAF's  performance.  The  evaluation  should
          include a performance  review of the IRPAF's lead  partner.  In making
          its evaluation, the Committee should take into account the opinions of
          management.

     3.   Ensure the IRPAF independence by:

          (i)  requiring that the IRPAF submit annually to the Audit Committee a
               formal written statement  delineating all  relationships  between
               the IRPAF and the Company;

          (ii) actively  engaging in a dialogue  with the IRPAF with  respect to
               all  relationships or services that may impact their  objectivity
               and independence,  including the matters required by Independence
               Standards Board Standard No. 1,  "Independence  Discussions  with
               Audit Committees;" and

          (iii) setting clear policies  defining the  circumstances  under which
               the Company is permitted to hire former employees of the IRPAF.

     4.   Review and approve in advance any non-audit  services and related fees
          proposed to be undertaken by the IRPAF on behalf of the Company;

     5.   Annually review the IRPAF's proposed scope and audit plan, and discuss
          staffing and timing of the audit and related matters.

     6.   Review,  at least  annually,  the  IRPAF's  report  on their  internal
          quality controls and any material issues and the steps taken and to be
          taken to deal with  issues  raised  by the  IRPAF's  internal  quality
          review,  peer  review,  or inquiry  by  governmental  or  professional
          organizations, at any time within the past five years.

     7.   Obtain from management, review and approve a description of issues and
          responses  whenever  a second  opinion  is  proposed  to be  sought by
          management from another outside accounting firm.

     8.   Require  the IRPAF to rotate the lead audit  partner  assigned  to the
          Company's  audit and the second partner  responsible for reviewing the
          audit at least every five years.

     9.   Periodically review rotating the IRPAF to be selected as the Company's
          IRPAF. The audit committee should present its conclusions with respect
          to the IRPAF to the Board of Directors.

With Respect to Financial Statements:

     10.  Review accounting  principles and financial  statement  presentations,
          including:

          (i)  any  changes  in  the  Company's   selection  or  application  of
               significant accounting principles;

          (ii) any major  issues as to the  adequacy of the  Company's  internal
               controls  and any  special  audit  steps  adopted by the IRPAF in
               light of material control deficiencies;

          (iii) analyses  prepared by management  and/or the IRPAF setting forth
               significant  financial  reporting  issues and  judgments  made in
               connection  with the  preparation  of the  financial  statements,
               including  analyses  of  the  effects  of  alternative  Generally
               Accepted   Accounting   Principles   ("GAAP")  on  the  financial
               statements; and

          (iv) the effect of regulatory and accounting  initiatives,  as well as
               off-balance  sheet  arrangements,   on  the  Company's  financial
               statements  for  compliance   with   applicable   accounting  and
               disclosure rules.

30 California Water Service Group

     11.  Review with the Company's IRPAF:

          (i)  all critical accounting policies and practices to be used;

          (ii) all alternative  treatments of financial  information within GAAP
               that have been discussed with Company  management,  ramifications
               of the use of such  alternative  disclosures and treatments,  and
               the treatment preferred by the IRPAF; and

          (iii) other  material  written  communications  between  the IRPAF and
               Company's  management,  such as any management letter or schedule
               of unadjusted accounting differences.

     12.  Inquire  of the  IRPAF at a  post-audit,  pre-issuance  review  of the
          Company's  annual financial  statements,  the IRPAF's opinion thereon,
          and  any  problems,  difficulties  or  disagreements  with  management
          encountered  by  the  IRPAF  during  the  course  of  the  audit,  and
          management's response, including reviewing with the IRPAF:

          (i)  any restrictions on the scope of the IRPAF's activities or access
               to requested information;

          (ii) any accounting  adjustments,  whether  material or not, that were
               noted or  proposed  by the  IRPAF  but were not  recorded  by the
               Company and assess the reason the adjustments were not recorded;

          (iii) any  communications  between the IRPAF and the IRPAF's  national
               office respecting  auditing or accounting issues presented by the
               engagement; and

          (iv) any "management" or "internal control" letter issued, or proposed
               to be issued, by the IRPAF to the Company.

     13.  Discuss with the Company's financial management and with the IRPAF the
          quarterly  and annual  financial  statements,  including the Company's
          disclosures under  "Management's  Discussion and Analysis of Financial
          Condition and Results of  Operations,"  prior to any public release or
          announcement or submission to a regulatory agency.

     14.  Review with  management  each Form 10-K and 10-Q report required to be
          submitted to the SEC, its  disclosures to the Committee  under Section
          302 of the  Sarbanes-Oxley  Act ("Act") and the  contents of the Chief
          Executive  Officer  and the  Chief  Financial  Officer  certifications
          required  to be  filed  under  Section  302 and 906 of the  Act.  Each
          quarter, review with management the status of significant deficiencies
          or  material  weaknesses  as  reported  under  Section 404 of the Act.
          Annually,  review  management's  and the  IRPAF's  report on  internal
          controls as required under Section 404 of the Act and discuss relevant
          issues as appropriate.

     15.  Discuss  with the  IRPAF  the  matters  required  to be  discussed  by
          relevant auditing standards,  including the quality,  and not just the
          acceptability,  of the accounting  principles and underlying estimates
          used in the preparation of the financial statements.

     16.  Recommend to the Board of Directors  that the financial  statements be
          included in the  Company's  annual  report to the SEC on Form 10-K, if
          the  Committee  finds  the  financial  statements   acceptable;   such
          recommendation  shall  be  reported  in  the  Audit  Committee  report
          included in the proxy statement.

     17.  Review and discuss  quarterly  earnings  releases  with the  Company's
          financial management and the IRPAF prior to issuance.

     18.  Review the  Company's  policy for financial  information  and earnings
          guidance  provided to analysts and rating agencies.  Review,  prior to
          publication or filing of other Company financial information,  such as
          news releases,  required  regulatory  filings and guidance provided to
          financial  analysts,  that  include  financial  information,   as  the
          Committee deems desirable.

                                               California Water Service Group 31

With Respect to Internal Auditing and Internal Controls:

     19.  Appoint, in consultation with management, the Company's internal audit
          firm that shall report to and be responsible to the Committee.

     20.  Review and approve the annual  internal audit plan including  internal
          audit firm compensation.

     21.  Annually  review the  quality of  internal  accounting  and  financial
          control, internal auditor reports and opinions and any recommendations
          the auditor may have for improving or changing the Company's  internal
          controls,  as well as management's  response to the internal auditor's
          recommendations.

     22.  Discuss  policies with respect to the Company's  risk  assessment  and
          risk  management,  and  review  the  Company's  major  financial  risk
          exposures and the steps  management  has taken and proposes to take to
          monitor and control such exposures.

VI. Annual Performance Evaluation and Other Matters

     23.  The Committee  shall  conduct an annual  performance  evaluation  that
          considers matters related to its  responsibilities in dealing with the
          IRPAF,  financial  statements,  internal  audit  function and internal
          control.

     24.  This Charter will be reviewed at least  annually  with  revisions  the
          Committee determines as necessary proposed to the Board of Directors.

     25.  The Committee will prepare a report to the  stockholders for inclusion
          in each proxy  statement,  as required by SEC  regulations.  The Audit
          Committee  Charter will be published  each year,  as required,  in the
          proxy statement and be available  through the Company's  website.  The
          report will include the name(s) of the  Committee  members who qualify
          as financial experts as defined by the SEC.

     26.  Annually the Committee  will review and approve the Company's  code of
          business  conduct and ethics for  directors  and  executive  officers,
          including  the code of conduct for the CEO and  financial  executives.
          The Committee will approve any waivers in the codes and ascertain that
          changes and waivers are disclosed in a Form 8-K filing with the SEC.

     27.  The Committee will maintain procedures whereby an employee may submit,
          on  a  confidential   and  anonymous   basis,   complaints   regarding
          questionable  accounting,  internal accounting  controls,  or auditing
          matters.  There shall also be  procedures  for the  Committee,  at its
          Chair's direction, to investigate these matters.

     28.  Annually,  the  Committee  will  review the  pension  plan  investment
          objectives  and changes to pension  plan  assumptions.  The  Committee
          shall report its finding to the Board of Directors.

32 California Water Service Group




[GRAPHIC OF MAP SHOWING COMPANY'S STREET LOCATION OMITTED]



California Water Service Group
California Water Service Company,
Hawaii Water Service Company,
New Mexico Water Service Company,
Washington Water Service Company and CWS Utility Services
1720 North First Street
San Jose, CA 95112-4598
(408) 367-8200





California Water Service Group
1720 North First Street
San Jose, California 95112-4598
408.367.8200
www.calwatergroup.com





[GRAPHIC OF LOGOS OF COMPANY AND ITS SUBIDIARIES OMITTED]



                       ANNUAL MEETING OF STOCKHOLDERS OF


                         CALIFORNIA WATER SERVICE GROUP

                                 April 26, 2006


                           Please date, sign and mail
                             your proxy card in the
                           envelope provided, or vote
                          by Telephone or Internet, as
                                soon as possible.


     Please detach along perforated line and mail in the envelope provided.



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

THE BOARD OF DIRECTORS  RECOMMENDS  A VOTE "FOR" THE  ELECTION OF DIRECTORS  AND
                               "FOR" PROPOSAL 2.
PLEASE SIGN, DATE AND RETURN PROMPTLY IN THE ENCLOSED ENVELOPE. PLEASE MARK YOUR
                  VOTE IN BLUE OR BLACK INK AS SHOWN HERE [X]
--------------------------------------------------------------------------------

1.    ELECTION OF DIRECTORS

                                    NOMINEES:
                                    (  ) Douglas M. Brown
[ ] FOR ALL NOMINEES                (  ) Robert W. Foy
                                    (  ) Edward D. Harris, Jr. M.D.,
                                    (  ) Bonnie G. Hill
[ ] WITHHOLD AUTHORITY              (  ) David N. Kennedy
    FOR ALL NOMINEES                (  ) Richard P. Magnuson
                                    (  ) Linda R. Meier
                                    (  ) Peter C. Nelson
[ ] FOR ALL EXCEPT                  (  ) George A. Vera
   (See instruction below)

INSTRUCTION:   To withhold authority to vote for any individual nominee(s), mark
               "FOR ALL EXCEPT" and fill in the circle next to each nominee whom
               you wish to withold voting for, (as shown here: ( X )

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





--------------------------------------------------------------------------------
To change  the  address  on your  account,  please
check  the box at  right  and  indicate  your  new
address in the address  space  above.  Please note
that  changes  to the  registered  name(s)  on the
account may not be submitted via this method.                      [ ]
--------------------------------------------------------------------------------


2.    PROPOSAL  TO  RATIFY  THE  APPOINTMENT  OF KPMG  LLP   as the  independent
      registered public accounting firm of the Group for 2006.

                        FOR     AGAINST         ABSTAIN
                        |_|       |_|             |_|

If not  otherwise  directed,  this  proxy  will be  voted  FOR the  election  of
directors and FOR  ratification  of the  appointment  of KPMG LLP as independent
registered  public  accounting  firm for 2006 and in the discretion of the proxy
holders on any other matters  properly raised at the meeting.  The Company knows
of no other  matter to be raised at the  meeting  other than as set forth in the
Company's proxy statement.


Please date, sign and return promptly.



Signature of Stockholder   _______________________    Date:  ___________________

Signature of Stockholder   _______________________    Date:  ___________________


NOTE:  Please  sign  exactly as your name or names  appear on this  Proxy.  When
       shares  are held  jointly,  each  holder  should  sign.  When  signing as
       executor, administrator,  attorney, trustee or guardian, please give full
       title as such. If the signer is a corporation, please sign full corporate
       name by duly authorized officer,  giving full title as such. If signer is
       a partnership, please sign in partnership name by authorized person.



                         CALIFORNIA WATER SERVICE GROUP

           THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

     PETER C.  NELSON and DAN L.  STOCKTON,  and each of them with full power of
substitution,  are hereby authorized to vote, as designated on the reverse side,
all the shares of  California  Water  Service  Group common stock and  preferred
stock of the  undersigned  at the Annual Meeting of  Stockholders  of California
Water Service Group to be held at 1720 N. First Street, San Jose,  California on
Wednesday,  April 26, 2006 at 9:30 a.m., or at any  adjournment  thereof.  By my
signature on the reverse side of this proxy, I acknowledge  that I have received
a copy of the notice of meeting and proxy statement relating to this meeting and
of the  Group's  Annual  Report  to  Stockholders  for  2005.  Unless  otherwise
specified below this proxy authorizes the proxies to cumulate all votes that the
undersigned  is entitled to cast at the Annual Meeting for, and to allocate such
votes  among,  one or more of the  nominees  listed on the  reverse  side as the
proxies  determine  in their  discretion.  To  specify  a  different  method  of
cumulative voting, write "cumulate for" and the number of shares and the name(s)
of the nominee(s) in the space provided below.


--------------------------------------------------------------------------------
Please date, sign, and mail as soon as possible in the enclosed envelope.


                (Continued and to be signed on the reverse side)


                       ANNUAL MEETING OF STOCKHOLDERS OF


                         CALIFORNIA WATER SERVICE GROUP

                                 April 26, 2006


                           PROXY VOTING INSTRUCTIONS


MAIL - Date,  sign and mail  your  proxy
card in the envelope provided as soon as
possible.

                      - or -               _____________________________________
                                          |                  |
TELEPHONE - Call toll-free 1-800-PROXIES  |                  |
(1-800-776-9437)   from  any  touch-tone  |   COMPANY NUMBER |
telephone  and follow the  instructions.  |__________________|__________________
Have your proxy card  available when you  |                  |
call.                                     |                  |
                                          |  ACCOUNT NUMBER  |
                      - or -              |__________________|__________________
                                          |                  |
INTERNET  -  Access  "www.voteproxy.com"  |                  |
and follow the  on-screen  instructions.  |                  |
Have your proxy card  available when you  |__________________|__________________
access the web page.


--------------------------------------------------------------------------------
You may enter your voting instructions at 1-800-PROXIES or  www.voteproxy.com up
until  11:59 PM  Eastern  Time the day  before the  meeting  date.  We have been
advised by counsel that these  telephone and Internet voting  procedures  comply
with Delaware law.
--------------------------------------------------------------------------------

Please detach along perforated line and mail in the envelope provided IF you are
not voting via telephone or the Internet.

--------------------------------------------------------------------------------
THE BOARD OF DIRECTORS  RECOMMENDS  A VOTE "FOR" THE  ELECTION OF DIRECTORS  AND
"FOR"  PROPOSAL  2.  PLEASE  SIGN,  DATE AND  RETURN  PROMPTLY  IN THE  ENCLOSED
ENVELOPE. PLEASE MARK YOUR VOTE IN BLUE OR BLACK INK AS SHOWN HERE [X]
--------------------------------------------------------------------------------

1.    ELECTION OF DIRECTORS:     You cannot  cumulate your  votes when voting by
                                 Internet  or  telephone.  In  order to cumulate
                                 your votes, you must return this  proxy card by
                                 mail in the enclosed envelope.

                                    NOMINEES:
                                    (  ) Douglas M. Brown
[ ] FOR ALL NOMINEES                (  ) Robert W. Foy
                                    (  ) Edward D. Harris, Jr. M.D.,
                                    (  ) Bonnie G. Hill
[ ] WITHHOLD AUTHORITY              (  ) David N. Kennedy
    FOR ALL NOMINEES                (  ) Richard P. Magnuson
                                    (  ) Linda R. Meier
                                    (  ) Peter C. Nelson
[ ] FOR ALL EXCEPT                  (  ) George A. Vera
   (See instruction below)

INSTRUCTION:   To withhold authority to vote for any individual nominee(s), mark
               "FOR ALL EXCEPT" and fill in the circle next to each nominee whom
               you wish to withold voting for, (as shown here: ( X )

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





--------------------------------------------------------------------------------
To change  the  address  on your  account,  please
check  the box at  right  and  indicate  your  new
address in the address  space  above.  Please note
that  changes  to the  registered  name(s)  on the
account may not be submitted via this method.                      [ ]
--------------------------------------------------------------------------------


2.    PROPOSAL  TO  RATIFY  THE  APPOINTMENT  OF  KPMG  LLP  as the  independent
      registered public accounting firm of the Group for 2006.

                        FOR     AGAINST         ABSTAIN
                        |_|       |_|             |_|

If not  otherwise  directed,  this  proxy  will be  voted  FOR the  election  of
directors and FOR  ratification  of the  appointment  of KPMG LLP as independent
registered  public  accounting  firm for 2006 and in the discretion of the proxy
holders on any other matters  properly raised at the meeting.  The Company knows
of no other  matter to be raised at the  meeting  other than as set forth in the
Company's proxy statement.


Please date, sign and return promptly.



Signature of Stockholder   _______________________    Date:  ___________________

Signature of Stockholder   _______________________    Date:  ___________________


NOTE:  Please  sign  exactly as your name or names  appear on this  Proxy.  When
       shares  are held  jointly,  each  holder  should  sign.  When  signing as
       executor, administrator,  attorney, trustee or guardian, please give full
       title as such. If the signer is a corporation, please sign full corporate
       name by duly authorized officer,  giving full title as such. If signer is
       a partnership, please sign in partnership name by authorized person.