EXHIBIT 31.1


                                 CERTIFICATIONS

I, W. Richard Roth, President and Chief Executive Officer, certify that:

I  have  reviewed  this  Quarterly  Report  on  Form  10-Q  of  SJW  Corp.  (the
"registrant");

1.   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;

2.   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 report;

3.   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 15d-15(e)) and internal  control over financial
reporting  (as defined in Exchange Act Rules  13a-15(f) and  15d-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  fourth
fiscal  quarter  that  has  materially  affected,  or is  reasonably  likely  to
materially affect, the registrant's  internal control over financial  reporting;
and

4.   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  weakness 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

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         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: August 5, 2005                       /s/  W. Richard Roth
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                                           W. Richard Roth
                                           President and Chief Executive Officer
                                           (Principal executive officer)





















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