Golden State Water provides reliable, high-quality drinking water to approximately 11,000 customers in the Claremont Customer Service Area (CSA), which includes Claremont and portions of Montclair, Pomona and Upland. Our local team includes 11 dedicated employees who take pride in serving Claremont customers 24/7.

Local water comes from two sources:  60 percent comes from local groundwater supplies, which Golden State Water maintains, and the balance is imported from the Metropolitan Water District of Southern California (MWD) via Three Valleys Municipal Water District.

As a regulated utility, Golden State Water’s rates are determined by the California Public Utilities Commission (CPUC) through a General Rate Case (GRC) to ensure customers receive a fair rate for reliable, quality water service.

  • Effective April 20, 2017, an average residential customer in the Claremont Customer Service Area with a 1” meter, using 11,220 gallons (1,500 cubic feet or 15 Ccf) of water per month, would see a monthly bill increase of $4.94 from $89.58 to $94.52 compared to 2016 (excluding any applicable surcharges).
  • Golden State Water’s rates for 2016, 2017 and 2018 were approved by the CPUC in March 2017. The GRC approval was originally expected prior to Jan. 1, 2016, and the delayed approval prevented Golden State Water from implementing the new rates for 2016 on schedule (2015 rates remained in place during the delay period).
  • For additional information on local water rates, please click here. To review frequently asked questions about water rates, read our fact sheet. English | Spanish
  • For additional information on proposed water rates for the years 2019, 2020 and 2021, please click here.

Proactive system maintenance has always been an emphasis for Golden State Water, and we continually invest to improve our water systems by upgrading both treatment and delivery systems in all service territories.

To view current and completed projects in your area, click here.

Urban Water Management Plan (UWMP)
Every five years, UWMPs are prepared for systems that supply more than 3,000 acre-feet of water per year or serve more than 3,000 connections. UWMPs are prepared to support long-term planning goals and ensure that adequate water supplies are available to meet existing and future water demands.

Please click here to learn more or view the UWMP for your area.

On April 7, 2017, Governor Jerry Brown issued an executive order lifting the drought emergency for most of the state, while asking Californians to continue using water responsibly and make conservation a way of life.

Local water-use and outdoor irrigation restrictions implemented during the drought emergency have been lifted.

Local News & Updates

Customer Alert: Claremont & San Dimas Water Systems

Golden State Water would like to inform customers served by the Claremont and San Dimas water systems that they may experience an “earthy” taste and odor with their drinking water in the coming days.

Click here to learn more.

Customer Update: Maintenance Shutdown Planned at MWD Facility, April 23-29

Golden State Water is notifying Claremont customers of a maintenance shutdown at Metropolitan Water District’s Rialto Feeder from April 23-29, 2018.

Click here to learn more.

Golden State Water Sponsors The Wall That Heals Mobile Exhibit

Golden State Water is a proud sponsor of The Wall That Heals mobile exhibit that will be on display at Lone Hill Middle School in San Dimas from March 22-25.

Click here to read more.

Golden State Water Releases New Video On Infrastructure Investments

Customers are encouraged to watch our new video that addresses Golden State Water’s commitment to responsibly maintaining our water infrastructure to protect the safety and reliability of your water.

Click here to view.