CWT · Annual Report (Form 10-K) · Filed February 27, 2026

California Water Service Group — 10-K exhibit

cwt-20251231xex32.htm

California Water Service Group on Boardroom Alpha

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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 hereby certifies, in his capacity as an officer of California Water Service Group, that the Annual Report of California Water Service Group on Form 10-K for the period ended December 31, 2025, as filed with the Securities and Exchange Commission on the date hereof (the "Annual Report"), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and that the information contained in the Annual Report fairly presents, in all material respects, the financial condition and results of operations of California Water Service Group.


Date: February 26, 2026	By:	/s/ MARTIN A. KROPELNICKI


		MARTIN A. KROPELNICKI Chairman, President and Chief Executive Officer California Water Service Group

Date: February 26, 2026	By:	/s/ JAMES P. LYNCH


		JAMES P. LYNCH Senior Vice President, Chief Financial Officer and Treasurer (Principal Financial Officer)

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