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Water Service in San Jos There are three water retailers in San Jose, each with their own service areas: San Jose Municipal Water, which is owned and operated by the City of San Jose, San Jose Water Company, and Great Oaks Water Company which are both privately owned and regulated by the California Public Utilities Commission.

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 and CWS Utility Services. Together these companies provide regulated and non-regulated water service to more than 2 million people in 100 California, Washington, New Mexico and Hawaii communities. Its common stock trades on the New York Stock Exchange under the symbol CWT. California Water Service Group maintains a location in San Jose, Calif.