California Water Service Group Chief Executive Officer Peter C. Nelson to Retire and Serve as Board Chairman; Martin A. Kropelnicki Named New Chief Executive Officer and Elected to Board

SAN JOSE, CA -- (Marketwired) -- 07/31/13 -- California Water Service Group (NYSE: CWT) announced today that effective September 1, 2013, Chairman and Chief Executive Officer Peter C. Nelson will retire as an employee of the company and begin serving as non-executive Chairman of the Board.