Exhibit
32.1
CERTIFICATION
PURSUANT TO
18
U.S.C. SECTION 1350
AS
ADOPTED PURSUANT TO
SECTION
906 OF THE SARBANES-OXLEY ACT OF 2002
In
connection with the Quarterly Report of SJW Corp. (the ‘‘Company’’) on Form 10-Q
for the quarter ended June 30, 2007 as filed with the Securities and Exchange
Commission on the date hereof (the ‘‘Report’’), I, W. Richard Roth, President
and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C.
Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act
of
2002, that to my knowledge on the date hereof:
(1) the
Report fully complies with the requirements of section 13(a) or 15(d) of the
Securities Exchange Act of 1934; and
(2) the
information contained in the Report fairly presents, in all material respects,
the financial condition and results of operations of the Company.
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/s/
W. RICHARD ROTH
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W.
Richard Roth
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President
and Chief Executive Officer
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(Principal
executive officer)
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August
3, 2007
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