SPECIMEN CERTIFICATES

Published on December 20, 1999



EXHIBIT 4.1

Specimen Certificates for Shares of Common and Preferred Stock of
Cal Water Delaware




[Lace edging 1 1/2 inches wide [California Water Service CALIFORNIA WATER [Lace edging 1 1/2 inches
down left side of Group Logo] SERVICE GROUP wide down right side of
Certificate] Certificate broken by
lined stripe]

THIS CERTIFICATE IS TRANSFERABLE IN [lined stripe 1.5 mm]
COMMON STOCK BOSTON OR NEW YORK SHARES

WITHOUT PAR VALUE CUSIP 130788 10 2

INCORPORATED UNDER THE LAWS OF THE SEE REVERSE FOR CERTAIN DEFINITIONS
STATE OF CALIFORNIA AND A STATEMENT AS TO THE RIGHTS,

PREFERENCES, PRIVILEGES AND
RESTRICTIONS ON SHARES

THIS CERTIFIES THAT



IS THE OWNER OF

FULLY PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK OF [Text to the left also
stamped with the
following: "State
of Incorporation
Changed to Delaware"]

[In Script] California Water Service Group, transferable on the books of the corporation by the holder hereof in
person or by attorney upon surrender of this certificate properly endorsed. Any owner, holder or transferee of the
stock represented by this certificate takes the same expressly subject to the provisions of the Restated Articles of
Incorporation and the By-Laws of the corporation and to any amendment or amendments of the Restated Articles of
Incorporation or the By-Laws. This certificate is not valid unless countersigned by the Transfer Agent and registered
by the Registrar.

Witness the facsimile seal of the corporation and the facsimile signatures of its duly authorized officers.

[*CALIFORNIA WATER
SERVICE GROUP*
INCORPORATED
SEAL
JANUARY 16, 1997
CALIFORNIA
Dated: California Water Service Group

COUNTERSIGNED AND REGISTERED [Family of four [FACSIMILE SIGNATURE]
Bank Boston, N.A. IN FRONT OF PRESIDENT
TRANSFER AGENT AND REGISTRAR forest scene] CHIEF EXECUTIVE OFFICER
[1.0 mm stripe] BY [FACSIMILE SIGNATURE] [FACSIMILE SIGNATURE]
AUTHORIZED SIGNATURE SECRETARY



[REVERSE SIDE OF COMMON STOCK CERTIFICATE]
CALIFORNIA WATER SERVICE GROUP

The Company is authorized to issue common shares without par value and
preferred shares of the par value of $25 each. The preferred shares are issuable
in series and the Board of Directors is authorized by the Restated Articles of
Incorporation to fix or alter from time to time the number of shares
constituting any wholly unissued series of preferred shares and to fix or alter
from time to time the dividend rights, dividend rate, conversion rights, voting
rights, rights and terms of redemption, the redemption price or prices or the
liquidation preferences (including the absence or limited grant of any such
rights or preferences) of any wholly unissued series of preferred shares.

A statement of the rights, preferences, privileges and restrictions
granted to or imposed upon the respective classes or series of shares authorized
to be issued and upon the holders thereof as established by the Restated
Articles of Incorporation (or by any certificate of determination of
preferences) and the number of shares constituting each series or class and the
designation thereof is available, upon request and without charge, at the office
of the Corporate Secretary, 1720 North First Street, San Jose, California
95112-4598, or at the office of the Transfer Agent.

THIS CERTIFICATE: ALSO EVIDENCES AND ENTITLES THE HOLDER HEREOF TO
CERTAIN RIGHTS AS SET FORTH IN A RIGHTS AGREEMENT BETWEEN CALIFORNIA WATER
SERVICE GROUP AND BANKBOSTON, N.A. DATED AS OF FEBRUARY 12, 1998 (THE "RIGHTS
AGREEMENT"). THE TERMS OF WHICH ARE HEREBY INCORPORATED HEREIN BY REFERENCE AND
A COPY OF WHICH IS ON FILE AT THE PRINCIPAL EXECUTIVE OFFICES OF CALIFORNIA
WATER SERVICE GROUP UNDER CERTAIN CIRCUMSTANCES AS SET FORTH IN THE RIGHTS
AGREEMENT. SUCH RIGHTS WILL BE EVIDENCED BY SEPARATE CERTIFICATES AND WILL NO
LONGER BE EVIDENCED BY THIS CERTIFICATE. CALIFORNIA WATER SERVICE GROUP WILL
MAIL TO THE HOLDER OF THIS CERTIFICATE A COPY OF THE RIGHTS AGREEMENT WITHOUT
CHARGE AFTER RECEIPT OF A WRITTEN REQUEST THEREFOR. UNDER CERTAIN CIRCUMSTANCES,
AS SET FORTH IN THE RIGHTS AGREEMENT, RIGHTS ISSUED TO, OR HELD BY, ANY PERSON
WHO BECOMES AN ACQUIRING PERSON OR AN AFFILIATE OR ASSOCIATE THEREOF (AS DEFINED
IN THE RIGHTS AGREEMENT) AND CERTAIN RELATED PERSONS WHETHER CURRENTLY HELD BY
OR ON BEHALF OF SUCH PERSON OR BY ANY SUBSEQUENT HOLDER, MAY BECOME NULL AND
VOID.

The following abbreviations, when used in the inscription on the face of
this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

TEN COM - as tenants in common UNIF GIFT MIN ACT ____ Custodian ____
(Cust.)

(Minor)
TEN ENT - as tenants by the entireties under Uniform Gifts
to Minors Act

JT TEN - as joint tenants with right of -------------------
survivorship and not as tenants (State)
in common

Additional abbreviations may also be used though
not in the above list.
[In script] For Value received, ___________ hereby sell assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
IDENTIFYING NUMBER OF ASSIGNEE


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



- --------------------------------------------------------------------------------
PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS INCLUDING ZIP CODE OF ASSIGNEE


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


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


- ------------------------------------------------------------------------ Shares
of the Stock represented by the within Certificate, and do hereby irrevocably
constitute and appoint


- ---------------------------------------------------------------------- Attorney
to transfer the said Stock on the books of the within-named Company with full
power of substitution in the premises.
Dated
--------------------

In Presence of
--------------------


- ----------------------------------
SIGNATURE(S) GUARANTEED

- ----------------------------------
The signature should be guaranteed by a brokerage firm or a financial
institution that is a member of a securities appointed Medallion program, such
as Securities Transfer Agents Medallion Program (STAMP). Stock Exchanges
Medallion Program (SEMP) or New York Stock Exchange, Inc. Medallion Signature
Program (MSP).

NOTICE: THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME AS
WRITTEN UPON THE FACE OF THE CERTIFICATE, IN EVERY PARTICULAR, WITHOUT
ALTERATION OR ENLARGEMENT, OR ANY CHANGE WHATEVER.

[Green lace edging 1/2 inches wide around Certificate with corner shields on two
top corners.]

THIS CERTIFICATE IS TRANSFERABLE
IN BOSTON, MA OR NEW YORK, NY



[Engraving of river and waterfall [Green shield (1-3/4" by 1-1/4") with SHARES
[Green shield (1-3/4" with city scene on left and country scene on right] engraved and empty Block beneath.]
by 1-1/4") with NUMBER
engraved and Block CALIFORNIA WATER SERVICE GROUP
with SFC in black INCORPORATED UNDER THE LAWS OF THE STATE OF CALIFORNIA
and bold] JANUARY 16, 1997

"SERIES C" "SERIES C"
PREFERRED STOCK PREFERRED STOCK

[In light green THIS CERTIFIES THAT CUSIP 130788 20 1
striped box.] SEE REVERSE SIDE FOR
CERTAIN DEFINITIONS


IS THE OWNER OF

[Text below also stamped with the following:
"State of Incorporation Changed to Delaware"]

[End light green box.]

FULLY PAID SHARES OF THE PAR VALUE OF TWENTY-FIVE DOLLARS ($25.00) EACH OF THE 4.4% CUMULATIVE PREFERRED STOCK, SERIES C"
OF CALIFORNIA WATER SERVICE GROUP, transferable on the books of the corporation in person or by attorney upon surrender of this
certificate properly endorsed. Any owner, holder or transferee of the stock represented by this certificate takes the same expressly
subject to the provisions of the Amended Articles of Incorporation or the By-Laws of the corporation and to any amendment or
amendments of the Amended Articles of Incorporation and the By-Laws. This certificate is not valid unless countersigned by the
Transfer Agent and registered by the Registrar.
Witness the facsimile seal of the corporation and the facsimile signatures of its duly authorized officers.

Dated: CALIFORNIA WATER SERVICE GROUP

[*CALIFORNIA WATER
SERVICE GROUP*
INCORPORATED
SEAL
JANUARY 16, 1997
CALIFORNIA]

[FACSIMILE SIGNATURE] [FACSIMILE SIGNATURE]
Secretary President
Chief Executive Officer



[REVERSE SIDE OF PREFERRED STOCK CERTIFICATE]

CALIFORNIA WATER SERVICE GROUP

The Company is authorized to issue common shares without par value and
preferred shares of the par value of $25 each. The preferred shares are issuable
in series and the Board of Directors is authorized by the Restated Articles of
Incorporation, as amended, to fix or alter from time to time the number of
shares constituting any wholly unissued series of preferred shares and to fix or
alter from time to time the dividend rights, dividend rate, conversion rights,
voting rights, rights and terms of redemption, the redemption price or prices or
the liquidation preferences (including the absence or limited grant of any such
rights or preferences) of any wholly unissued series of preferred shares.

A statement of the rights, preferences, privileges and restrictions
granted to or imposed upon the respective classes or series of shares authorized
to be issued and upon the holders thereof as established by the Restated
Articles of Incorporation, as amended, (or by any certificate of determination
of preferences), and the number of shares constituting each series or class and
the designation there, as amended, of is available, upon request and without
charge, at the office of the Secretary of the Company, 1720 North First Street,
San Jose, California 95112, or at the office of the Transfer Agent.

The following abbreviations, when used in the inscription on the face of
this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

UNIF GIFT MIN ACT
TEN COM - as tenants in common ______ Custodian ______
TEN ENT - as tenants by the entireties (Cust.) (Minor)
JT TEN - as joint tenants with right of under Uniform Gifts
survivorship and not as tenants to Minors Act
in common

-----------------------
(State)

Additional abbreviations may also be used though not in the above list.

[In script] For Value received, __________ hereby sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE

- --------------------------------------------------------------------------------
PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS OF ASSIGNEE


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


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


Shares
- ------------------------------------------------------------------------
of the Stock represented by the within Certificate, and do hereby irrevocably
constitute and appoint Attorney
------------------------------------------------

to transfer the said stock on the books of the within-named Company with full
power of substitution in the premises.

Dated ________________ __________________________

In Presence of

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


- -----------------------------------
The signature should be guaranteed by a brokerage firm or a financial
institution that is a member of a securities appointed Medallion program, such
as Securities Transfer Agents Medallion Program (STAMP). Stock Exchanges
Medallion Program (SEMP) or New York Stock Exchange, Inc. Medallion Signature
Program (MSP).


NOTICE: THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME AS
WRITTEN UPON THE FACE OF THE CERTIFICATE, IN EVERY PARTICULAR, WITHOUT
ALTERATION OR ENLARGEMENT, OR ANY CHANGE WHATEVER