Press Release

Cal Water CFO to Speak at Edward Jones Utility Conference

SAN JOSE, Calif.--(BUSINESS WIRE)--March 24, 2008--Martin A. Kropelnicki, Chief Financial Officer and Treasurer of California Water Service Group (Cal Water) (NYSE:CWT), will give a presentation about the company at the Edward Jones Mid-Cap Utility Conference on Tuesday, March 25, 2008, at 1:25 p.m. Eastern time at the New York Palace hotel in New York City.

Kropelnicki's presentation will not be webcast live; however, it can be viewed from the Calendar of Events page on Cal Water's web site 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., CWS Utility Services, and HWS Utility Services. The subsidiaries provide regulated and non-regulated water service to about 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 www.calwatergroup.com.

CONTACT: California Water Service Group
Shannon Dean, 310-257-1435 (Media)
Marty Kropelnicki, 408-367-8200 (Analysts)

SOURCE: California Water Service Group