Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors

SJW Corp.:

We consent to the use of our report dated March 5, 2010, with respect to the consolidated balance sheets of SJW Corp. and subsidiaries as of December 31, 2009 and 2008, and the related consolidated statements of income and comprehensive income, changes in shareholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2009, the financial statement schedule, and the effectiveness of internal control over financial reporting as of December 31, 2009, which report appears in the December 31, 2009 annual report on Form 10-K of SJW Corp., incorporated herein by reference and to the reference to our firm under the heading “Experts” in the prospectus.

/s/ KPMG LLP

Mountain View, California

February 2, 2011