Golden State Water has proudly served the San Dimas Customer Service Area since 1976. With more than 16,000 customers, Golden State Water serves residents in portions of Charter Oak, Covina, Glendora, La Verne, San Dimas and Walnut. This location has 13 local employees serving customers 24/7.

Water delivered to customers is a blend of groundwater pumped from the Main San Gabriel Basin and purchased water from the Metropolitan Water District of Southern California and 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 San Dimas Customer Service Area with a 5/8 x 3/4” meter, using 8,976 gallons (1,200 cubic feet or 12 Ccf) of water per month, would see a monthly bill increase of $5.05 from $54.72 to $59.77 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.

More than $585,400 in infrastructure improvements are planned for 2017 in the San Dimas service area.

The 2017 investments include water supply enhancements, distribution and ongoing improvements designed to replace old meters, mains and safety equipment. Click here to learn more and access a list of projects planned for 2017.

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

Golden State Water Participates in Annual Glendora & San Dimas Relay for Life

Golden State Water was proud to participate in the Glendora & San Dimas Relay for Life Saturday, May 20 at the Louie Pompei Sports Park in Glendora to support the programs of the American Cancer Society.

Click here to learn more.

Golden State Water Recognizes ‘Infrastructure Week’

In recognition of “Infrastructure Week” from May 15-19, 2017, Golden State Water is highlighting plans to invest more than $585,000 for local water infrastructure projects in 2017.

Click here to learn more.

2016-2018 Rate Information For San Dimas

Effective April 20, 2017, local water rates were adjusted. For additional information on local water rates and the GRC, please click here.

Fact Sheet: English | Spanish

Golden State Water To Invest More Than $585,400 For Local Infrastructure Projects In 2017

Golden State Water believes that proactive system maintenance is critical to protecting water service now and for future generations.

Click here to learn more or check out our video on proactive system maintenance.