Los Osos
Conservation
While Los Osos and Edna Road areas experienced historical precipitation in 2023, the rainfall did not sufficiently recharge local groundwater basins, the area’s primary water source. Until conditions improve, communities dependent on groundwater remain in Stage Two, and mandatory restrictions with surcharges for water use above allocations remain in effect. Surcharges are the most effective tool to protect local groundwater supplies, especially during summer.
Important Drought Notice:
Golden State Water Company’s Edna Road and Los Osos customers are required to reduce water use by 20% compared 2020.
| System | Reduction goal | Actual reduction * |
|---|---|---|
| Edna | 20% | -9% |
| Los Osos | 20% | 6% |
*Actual reduction (compared to 2020 usage)
In order to achieve the mandatory reductions, the following Staged Mandatory Conservation and Rationing plan has been filed for the local water system.
Golden State Water has activated its Staged Mandatory Water Conservation & Rationing (Schedule 14.1) filings that outline restrictions, water allocations, enforcement measures and surcharges designed to achieve reductions due to water supply shortages or to achieve identified water usage goals established by an authorized government agency or official.
The Los Osos community is in Stage 2. Under this stage, all outdoor irrigation is limited to two days per week. Outdoor irrigation is allowed only after 7PM and before 8AM, according to the schedule below.
Golden State Water customers who do not meet the Stage 2 mandatory 20% reduction in water use may be charged a drought surcharge of up to $2.50 per Ccf (or 748 gallons) for all usage in excess of the customer’s usage allocation. Golden State Water is implementing surcharges in Edna Road but not Los Osos. While Golden State Water is not currently implementing surcharges in Los Osos, we are closely monitoring water supply conditions and customer water usage and may implement surcharges if it becomes necessary to spur action and additional conservation.
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 in the Los Osos Customer Service Area with a 5/8 x 3/4” meter using 3,740 gallons (500 cubic feet or 5 Ccf) per month will see their 2024 monthly bill increase from $96.46 to $107.63, effective Feb. 1, 2025 (excluding any applicable surcharges).
- The average commercial customer in the Los Osos Customer Service Area with a 5/8 x 3/4” meter using 16,456 gallons (2,200 cubic feet or 22 Ccf) per month will see their 2024 monthly bill decrease from $344.78 to $329.43, effective Feb. 1, 2025 (excluding any applicable surcharges).
Rates/Infrastructure Investments
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2025-27 Infrastructure Investments/Water Rates Fact Sheet - Los Osos
- About Golden State Water Company
Tariff Sheets
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Financial Assistance
Maps
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- 2022-24 GRC Fact Sheet
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- 2022-24 Investments/Rates Fact Sheet
- 3 Things to Know About the Rate-Setting Proccess
- PFAS Fact Sheet
- 2025-27 Proposed Investments/Rates Fact Sheet
- Read more
Capital Projects
GRC 2023 General Case (2025-27)
The rates adopted for 2025-2027 will provide customers with long-term value by investing over $5.1 million in needed capital investments and maintenance of local water infrastructure essential to the delivery and treatment of reliable, quality water.
Investments in the Los Osos Service Area include but are not limited to water distribution infrastructure improvements, rehabilitation of wells, transportation equipment and the replacement of aging mains and meters, pumping and purification equipment. 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 - Los Osos
Current & Upcoming Projects
Water Shutdown – Wednesday, May 29
Location: Vista De Oro Estates (Montana Way, Los Arboles Way, Vista Court and Los Padres Court)
The shutdown is anticipated to commence on Wednesday, May 29, 2024, with completion within the same workday. Interruption of water service will be from 8:00 a.m. to 5:00 p.m.
Construction crews will work to:
- Conduct a scheduled water shutdown project to ensure Golden State Water can continue providing reliable water service to local customers.
View the Construction Notice.
Exterior Recoat of Water Storage Tank
Location: 1088 Calle Cordoniz, Los Osos, CA 93402
Project Timeline:
May 2024 – August 2024
Working Hours:
Monday – Friday (No weekends or holidays)
7:00 a.m. – 5:30 p.m.
Construction crews will work to:
- Recoat the exterior of an existing water storage tank.
This project will ensure Golden State Water can continue providing reliable water service to local customers.
View the Construction Notice.
Lewis Ln Well 2 Demo at Lewis Lane Plant Site
Location: 7035 Lewis Ln, San Luis Obispo, CA 93401
Project Timeline:
April 2024 – May 2024
Working Hours:
Monday – Friday (No weekends or holidays)
7:00 a.m. – 5:00 p.m.
Construction crews will work to:
- Undertake well destruction at the Lewis Lane Plant site. Work may include controlled water discharge from the plant site area drainage pit.
This project will ensure Golden State Water can continue providing reliable water service to local customers.
View the Construction Notice.
Water Main Improvements (Pecho Valley Rd., Rodman Dr., Madera St., San Dominico Ave.)
Location: The new pipeline will be installed on Pecho Valley Road from Rodman Drive to Montana Way, on Rodman Drive from Pecho Valley Road to Madera Street, and on Madera Street from Rodman Drive to San Dominico Avenue.
Project Timeline:
April 2024 – May 2024
Working Hours:
Monday – Friday (No weekends or holidays)
7:00 a.m. – 5:30 p.m.
Construction crews will work to:
- Replace approximately 1,800 feet of water main.
This project will ensure Golden State Water can continue providing reliable water service to local customers.
View the Construction Notice.
Water Main Improvements (Woodland Dr. to Mar Vista Dr.)
Location: The new pipeline will be installed on Doris Avenue from Woodland Drive to Mar Vista Drive.
Project Timeline:
February 2024 – May 2024
Working Hours:
Monday – Friday (No weekends or holidays)
7:00 a.m. – 5:30 p.m.
Construction crews will work to:
- Replace approximately 1,200 feet of water main.
This project will ensure Golden State Water can continue providing reliable water service to local customers.
View the Construction Notice.
Recently Completed Projects
Water Main Replacement
Location: Los Osos Valley Road from 10th Street to 9th Street, Bayview Heights Drive to Bay Oaks Drive.
Project Timeline:
September 11, 2023 – February 9, 2024
Working Hours:
Monday – Friday (No weekends or holidays)
7:00 a.m. – 4:00 p.m.
Construction crews will work to:
- Replace approximately 1,200 feet of water main.
This project will ensure Golden State Water can continue providing reliable water service to local customers.
View the Construction Notice.
View the Project Map.
San Luis Obispo County
Bayview Heights Dr. from Highland Dr. to North of Ocean View Pl.;
and on Highland Dr. from Bayview Heights Dr. to Palisades Ave.
Project Timeline:
October 2, 2017 – March 2018
Working Hours:
8 a.m. – 5 p.m.
Construction crews will work to:
- Install 2,000 ft. of water pipe
The new pipeline will improve the hydraulics of the system and provide more reliable service to our customers.
View the construction notice.