Press Release

Cal Water President & CEO to Speak at NYSSA Water Conference

SAN JOSE, CA, Nov 29, 2010 (MARKETWIRE via COMTEX) -- Peter C. Nelson, president & CEO of California Water Service Group (Cal Water) (NYSE: CWT), will give a presentation about the company at the New York Society of Security Analysts (NYSSA) Water Utilities Conference on Dec. 1, 2010, at 9:35 a.m. Eastern Time at the NYSSA office in New York City.

Nelson will provide an overview of the water industry, discuss current regulatory issues in California, and present information about California Water Service Group, its financial performance, and its strategy for future success.

California Water Service Group is the parent company of California Water Service Company, Washington Water Service Company, New Mexico Water Service Company, Hawaii Water Service Company, Inc., CWS Utility Services, and HWS Utility Services. The subsidiaries provide regulated and non-regulated water service to nearly 2 million people in 100 communities. The Company's common stock trades on the New York Stock Exchange under the symbol "CWT." Additional information about the company is available online at

1720 North First Street San Jose, CA 95112-4598

Shannon Dean
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Marty Kropelnicki
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SOURCE: California Water Service Group