San Dimas
Conservation
Following several years of heavy precipitation and snow in California, conditions have dramatically changed for many parts of the State. In response, the state has rolled back drought emergency provisions that are no longer needed while maintaining other measures supporting regions and communities facing water supply challenges.
Effective Sunday, May 14, 2023, Golden State Water Company modified outdoor watering restrictions to allow watering up to three days per week. Given that water conditions will continue to evolve, customers are encouraged to use water wisely and only use what is needed.
Golden State Water is recommending customers limit outdoor irrigation between the hours of 7 PM and 8 AM per the following schedule:
| Addresses Ending In: | Watering Days: |
|---|---|
| Even Numbers (0, 2, 4, 6, 8) | Sunday, Wednesday, Friday |
| Odd Numbers (1, 3, 5, 7, 9) | Tuesday, Thursday, Saturday |
Rates
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. New rates allow for investments to avoid the costly and sometimes dangerous effects of deferring maintenance or delaying the replacement of aging infrastructure.
2023 General Rate Case (2025-27 Rates)
In January of 2025, the California Public Utilities Commission (CPUC) adopted a General Rate Case for Golden State Water Company (Golden State Water) that includes local infrastructure investments and new water rates for 2025, 2026, and 2027. The new rates went into effect February 1, 2025.
These rates reflect Golden State Water’s long-term commitment to providing customers with high-quality water and reliable service by proactively investing in their community’s water supply and distribution systems. We never want customers to think twice about the quality of the water coming from their taps.
To learn how your rates are invested in your community, visit the Capital Projects tab, and for frequently asked questions about the rate-making process, click here.
- The average residential customer with a 5/8 X 3/4” meter using 9,724 gallons (1,300 cubic feet or 13 Ccf) per month will see their 2024 monthly bill increase from $88.80 to $92.85, effective Feb. 1, 2025 (excluding any applicable surcharges).
- The average commercial customer with a 2” meter using 79,288 gallons (10,600 cubic feet or 106 Ccf) per month will see their 2024 monthly bill increase from $814.59 to $934.65, effective Feb. 1, 2025 (excluding any applicable surcharges).
Rates/Infrastructure Investments
- 2025-27 Infrastructure Investments/Water Rates Fact Sheet - San Dimas
- About Golden State Water Company
Tariff Sheets
- Rates - Residential
- Rates - Non-Residential
- Rates - Irrigation Service - Forest Lawn
- Rates - Measured Irrigation Service
- Understanding Your Tariff Sheet
- Review All Rates, Tariffs and Advice Letters
Financial Assistance
Maps
Capital Projects
2023 General Rate Case (2025-27)
The rates adopted for 2025-2027 will provide customers with long-term value by investing over $31.5 million in needed capital investments and maintenance of local water infrastructure essential to the reliable production, treatment, and delivery of quality water.
Investments in the San Dimas Service Area include but are not limited to, water distribution projects, improvements to treatment facilities, plant site upgrades, improvements to a booster station, systemwide technology that monitors and controls the water system, the replacement of aging water mains and reservoirs. As part of our commitment to reliability and public safety, Golden State Water proactively invests in upgrading and maintaining its fire hydrants.
For frequently asked questions about the rate-making process, click here.
Learn about the infrastructure investments in the water system serving your community’s homes and businesses: 2023 GRC Infrastructure Investments - San Dimas.
Current & Upcoming Projects
Recently Completed Projects
Baseline Well No. 5
636 East Baseline Road, in the City of San Dimas
Investment:
$1,000,000
Project Timeline:
October 5, 2020 – January 2021
Working Hours:
Monday – Friday 8 a.m. – 5 p.m.
Construction crews will work to:
- Destroy the existing water well at Golden State Water Company’s Baseline Plant
- Drill and develop new water well
View the Construction notice.
Covina
800 N. Banna Ave. surrounded by Cypress St., Banna Ave., Kidder
Ave., and Colver Pl.
Project Timeline:
January 9, 2017 – TBD
Working Hours:
7 a.m. – 4 p.m.
Construction crews will work to:
- Install new water pipes
- Install new service lines
- Install fire hydrants
Covina
Calora St. and Kinsella
Project Timeline:
May 15, 2017 – August 21, 2017
Construction crews worked to:
- Replace aged water pipe
- Install new service lines
- Install fire hydrants
View the construction notice.