Claremont
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.
2026 General Rate Case (2028-30 Rates)
In July 2026, Golden State Water Company (Golden State Water) will file its 2026 General Rate Case (GRC) application with the California Public Utilities Commission (CPUC). The application proposes water rates and infrastructure investments for 2028, 2029 and 2030.
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.
Water Systems: Claremont
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The average residential customer in the Claremont Customer Service Area with a 1-inch meter using 11,220 gallons (15 Ccf) per month would see their current monthly bill increase from $167.93 to $198.10 in 2028, at the earliest (excluding any applicable surcharges).
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The average commercial customer in the Claremont Customer Service Area with a 2″ meter using 74,800 gallons (100 Ccf) per month would see their current monthly bill increase from $991.62 to $1146.70 in 2028, at the earliest (excluding any applicable surcharges).
Rates/Infrastructure Investments
Tariff Sheets
- Rates - Residential
- Rates - Non-Residential
- Rates - Measured Irrigation Service
- Rates - Limited Metered Service
- Understanding Your Tariff Sheet
- Review All Rates, Tariffs and Advice Letters
Financial Assistance
Maps
- English
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- here
- Fire Protection - Public
- Fire Protection - Private
- 2022-24 GRC Fact Sheet
- Schedule 14.1
- 2020-24 Investments/Rates Fact Sheet
- 2025-27 Proposed Investments/Rates Fact Sheet
- PFAS Fact Sheet
- 3 Things to Know About the Rate-Setting Process
- About Golden State Water Company
- 2025-27 Infrastructure Investments/Water Rates Fact Sheet - Claremont
- Read more
Capital Projects
2026 General Rate Case (2028-30)
The rates proposed for 2028-2030 will provide customers in the Claremont Service Area with long-term value by investing over $37 million in local water infrastructure essential to delivering safe, high-quality, and reliable drinking water.
Proposed investments include replacing two groundwater wells that have exceeded their useful service lives, upgrading the 1.5-million-gallon Del Monte Reservoir and 1.5-million-gallon Pomello Reservoir, installing tank mixers at five reservoirs to improve water quality, and replacing critical pressure-reducing valves and treatment infrastructure throughout the system. These projects, combined with ongoing pipeline replacements throughout the service area, will improve water quality, strengthen local groundwater reliability, and extend the life of critical water infrastructure. Together with the company’s ongoing investments in water treatment technology and fire hydrants that support public safety, new investments will help maintain safe drinking water standards and reliable service for the community.
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: Claremont Proposed 2028-30 GRC
Current & Upcoming Projects
248 E. 11 Street – Pipeline Installation
Location: 248 E. 11th Street, Claremont , CA 91711
Project Timeline: July 2026 – August 2026
Working Hours:
7:00 a.m. – 5:00 p.m. Monday – Friday (No weekends or holidays)
Construction crews will work to:
- Install new pipelines for the 10th Street-Building and Dance Addition.
Golden State Water is implementing measures to control dust and install sound walls to help reduce construction noise. During the construction period, there will be intermittent 24-hour work over a span of 2–3 months. This means that some night work will occur, but it will not happen every night, and the schedule may vary without a set pattern.
This project will improve the distribution system and ensure Golden State Water can continue providing reliable water service to local customers.
View the Construction Notice.
Montana Lane – New Well and Plant Site
Location: Southeast corner of Montana Lane & Padua Ave, Claremont, CA 91711
Project Timeline: May 2025 – December 2025
Working Hours:
8:00 a.m. – 5:00 p.m. Monday – Friday (No weekends or holidays)
Construction crews will work to:
- Install a new well and water plant.
Golden State Water is implementing measures to control dust and install sound walls to help reduce construction noise. During the construction period, there will be intermittent 24-hour work over a span of 2–3 months. This means that some night work will occur, but it will not happen every night, and the schedule may vary without a set pattern.
This project will improve the distribution system and ensure Golden State Water can continue providing reliable water service to local customers.
View the Construction Notice.
Recently Completed Projects
Pomello Plant
928 E. Pomello Drive
Investment:
$1.9 million
Project Timeline:
(delayed due to COVID-19) October 14, 2019 – May 2021
Working Hours:
7 a.m. – 5 p.m.
Construction crews will work to construct a new groundwater well.
This project will provide a new groundwater source for the local water system and ensure Golden State Water can continue providing reliable water service to local customers.
Click here to learn more.
View the construction notice to learn more.
Claremont
Yale Ave.
Investment:
$1,061,648
Construction crews worked to:
- Replace approximately 3,600 ft. of aged water pipe
- Install new service lines
- Install fire hydrants
Part 1: 1st St. to Harrison Ave.
Project Timeline:
June 6, 2017 – mid-July 2017
View the construction notice.
Part 2: Harrison Ave. to 7th St.
Project Timeline:
Mid-July 2017 – August 25, 2017
View the construction notice.
Claremont
Foothill Blvd. between Towne Ave. and Mountain Ave.
Project Timeline:
March 28, 2017 – end of April 2017
Working Hours:
7 a.m. – 5 p.m.
Construction crews worked to:
- Upgrade a fire hydrant
- Install new service line
View the construction notice.