California Water Service Group CFO Richard Nye to Present at Philadelp

    Business Editors

    SAN JOSE, Calif.--(BUSINESS WIRE)--May 4, 2005--California Water Service Group (NYSE: CWT) Chief Financial Officer and Treasurer Richard Nye will give a presentation on the Company to the Philadelphia Securities Association on Wednesday, May 11. The presentation will be held at the Union League Club in Philadelphia at 12:30 p.m. Eastern Time (9:30 a.m. Pacific Time).
    This call is being webcast live by Thomson/CCBN and can be accessed at California Water Service Group's web site at www.calwatergroup.com. Participants can listen to the audio webcast and view the presentation slides by clicking on the event name, which is listed on the Calendar of Events page under the Investor Relations section. The webcast also will be archived on Company's web site for one year following the presentation.
    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., 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. Group's common stock trades on the New York Stock Exchange under the symbol "CWT."

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CONTACT: California Water Service Group Analysts: Richard D. Nye, 408-367-8216 or Media: Shannon Dean, 310-257-1435

KEYWORD: CALIFORNIA INDUSTRY KEYWORD: GOVERNMENT ENERGY UTILITIES EARNINGS CONFERENCE CALLS SOURCE: California Water Service Group

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