California Water Service Group Schedules Fourth Quarter and Year-End 2007 Earnings Announcement and Teleconference

California Water Service Group (NYSE:CWT) today announced that its fourth quarter and year-end earnings results will be released after the market-close on Wednesday, February 27, 2008, and its teleconference will be held at 11 a.m. EDT on Thursday, February 28, 2008. All stockholders and interested investors are invited to listen to the teleconference. The 2007 fourth quarter and year-end conference call may be accessed by dialing 1-866-244-4519 and keying in ID# 1186949. A replay of the call will be available from 2:00 p.m. EDT on Thursday, February 28, 2008, through April 28, 2008, at 888-266-2081, ID# 835974. The call, which will be hosted by President and Chief Executive Officer Peter C. Nelson and Vice President and Chief Financial Officer Martin A. Kropelnicki, will also be webcast under the investor relations tab at www.calwatergroup.com. 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 nearly 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."