CERTIFICATIONS OF THE CFO

Exhibit 31.2

CERTIFICATIONS

I, Richard D. Nye, Chief Financial Officer of California Water Service Group,
certify that:

1. I have reviewed this Form 10-Q for September 30, 2003 of
California Water Service Group;

2. Based on my knowledge, this report does not contain any untrue
statement of a material fact or omit to state a material fact
necessary to make the statements made, in light of the
circumstances under which such statements were made, not
misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other
financial information included in this report, fairly present
in all material respects the financial condition, results of
operations and cash flows of the registrant as of, and for,
the periods presented in this quarterly report;

4. The registrant's other certifying officer and I are
responsible for establishing and maintaining disclosure
controls and procedures (as defined in Exchange Act Rules
13a-15(e) and internal control over financial reporting (as
defined in Exchange Act Rules 13a-15(f) for the registrant and
have:

a. Designed such disclosure controls and procedures, or
caused such disclosure controls and procedures to be
designed under our supervision, to ensure that
material information relating to the registrant,
including its consolidated subsidiaries, is made
known to us by others within those entities,
particularly during the period in which this report
is being prepared;

b. Designed such internal control over financial
reporting, or caused such internal control over
financial reporting to be designed under our
supervision, to provide reasonable assurance
regarding the reliability of financial reporting and
the preparation of financial statements for external
purposes in accordance with generally accepted
accounting principles;

c. Evaluated the effectiveness of the registrant's
disclosure controls and procedures and presented in
this report our conclusions about the effectiveness
of the disclosure controls and procedures, as of the
end of the period covered by this report based on
such evaluation; and

d. Disclosed in this report any change in the
registrant's internal control over financial
reporting that occurred during the registrant's most
recent fiscal quarter that has materially affected,
or is reasonably likely to materially affect, the
registrant's internal control over financial
reporting; and;


5. The registrant's other certifying officer and I have
disclosed, based on our most recent evaluation of internal
control over financial reporting, to the registrant's auditors
and the audit committee of registrant's board of directors (or
persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses
in the design or operation of internal control over
financial reporting which are reasonably likely to
adversely affect the registrant's ability to record,
process, summarize and report financial information;
and

b. Any fraud, whether or not material, that involves
management or other employees who have a significant
role in the registrant's internal control over
financial reporting.


Date: November 13, 2003 By: /s/ Richard D. Nye
---------------------------
RICHARD D. NYE
Chief Financial Officer
California Water Service
Group