Exhibit 32

CERTIFICATION OF CEO AND CFO

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, each of the undersigned certifies that this quarterly report on Form 10-Q for the period ended June 30, 2015 fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934 and that the information contained in this Report fairly presents, in all material respects, the financial condition and results of operations of California Water Service Group.

Date: July 30, 2015	By:	/s/ Martin A. Kropelnicki
		MARTIN A. KROPELNICKI
		President and Chief Executive Officer
		California Water Service Group
Date: July 30, 2015	By:	/s/ Thomas F. Smegal III
		THOMAS F. SMEGAL III
		Vice President, Chief Financial Officer and Treasurer
		California Water Service Group