Press Release

California Water Service Group Issues 2013-2014 Corporate Citizenship Report

SAN JOSE, CA--(Marketwired - Dec 1, 2014) - California Water Service Group (NYSE: CWT) today announced that it has released its 2013-2014 Corporate Citizenship Report, which highlights the company's efforts to enhance the quality of life for its customers, communities, employees, and stockholders, while operating in a way that respects the environment.

Titled "Committed to Doing the Right Thing," the report takes a service that is provided mostly out of sight or in the background and shows the care the company's 1,125 employees take to deliver a reliable supply of high-quality water that meets increasingly stringent water quality and environmental standards to customers, 24 hours per day, 7 days per week, 365 days per year. It also describes internal standards that drive the company to be a leader in providing excellent service to customers.

Other highlights in the report include steps taken on affordability, community service, water system reliability, supplier diversity, safety, employee development, and corporate governance. Environmental highlights include groundwater basin management, wildlife protection, projects to comply with or surpass strict environmental standards, energy efficiency, efforts to address climate change, water conservation, and wastewater reuse.

"We measure our success in corporate citizenship based on how we improve the quality of life of our customers, communities, employees, and stockholders, and how we do so while focusing on our promise to provide quality, service, and value," said President and CEO Martin A. Kropelnicki. "I'm proud to be part of a company that stays true to its values and has such a deep commitment to doing the right thing for all of its stakeholders."

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 approximately 2 million people in more than 100 California, Washington, New Mexico, and Hawaii communities. Group's common stock trades on the New York Stock Exchange under the symbol "CWT." Additional information is available at our web site at www.calwatergroup.com.

1720 North First Street
San Jose, CA 95112-4598

Contact:
Shannon Dean
(310) 257-1435 (media)