California Water Service Group Schedules First Quarter 2013 Earnings Results Announcement and Teleconference

SAN JOSE, CA -- (Marketwired) -- 04/08/13 -- California Water Service Group (NYSE: CWT) today announced that its first quarter earnings results will be released after market-close on Wednesday, April 24, 2013, and its teleconference will be held at 11:00 a.m. ET on Thursday, April 25, 2013.

All stockholders and interested investors are invited to listen to the teleconference. The 2013 first quarter conference call may be accessed by dialing 1-888-438-5524 or 1-719-325-2361 and keying in ID# 3539432. A replay of the call will be available from 2:00 p.m. ET on Thursday, April 25, 2013 through June 23, 2013, at 1-888-203-1112 or 1-719-457-0820, ID# 3539432. The call, which will be hosted by Chairman and Chief Executive Officer Peter C. Nelson, President and Chief Operating Officer Martin A. Kropelnicki, and Vice President and Chief Financial Officer Thomas F. Smegal, 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., CWS Utility Services, and HWS 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."

Released April 8, 2013