Los Osos

Los Osos


Golden State Water has proudly served the Los Osos area since 1976, providing high-quality and reliable water to approximately 3,300 customers in Edna Road and Los Osos.

Two water systems serve the Los Osos Customer Service Area. Water delivered to customers in the Edna Road System is groundwater, which is pumped from the Edna Valley Basin through wells operated by Golden State Water. Water delivered to the Los Osos System is groundwater pumped from the Los Osos Valley Groundwater Basin through wells owned and operated by Golden State Water.



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.



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.

  • On July 15, 2020, Golden State Water filed a GRC application for the years 2022, 2023 and 2024. Learn more: 2022-24 GRC Fact Sheet
  • Effective Sept. 27, 2019, an average residential customer in the Los Osos Customer Service Area would see a monthly bill increase of $0.090 per 748 gallons (1 Ccf), or approximately 0.6 percent, during the 12-month amortization period.
  • Effective June 8, 2019, an average residential customer in the Los Osos Customer Service Area with a 5/8 x 3/4” meter using 6 Ccf per month would see a monthly bill increase of $1.55 from $77.11 to $78.66 compared to 2018 (excluding any applicable surcharges).
  • On May 30, 2019, Golden State Water’s GRC was approved by the State of California to set water rates for 2019, 2020 and 2021 and authorize infrastructure investments for the local system. New rates were implemented effective June 8, 2019. Learn more here. (EnglishSpanish)
  • On July 1, 2018, local water rates decreased by 4.37% to pass cost savings from the new lower federal corporate income tax requirement through to customers. Click here to learn more.

Learn More

Understanding Your Tariff Sheet

Review All Rates, Tariffs and Advice Letters


Capital Projects

More than $2.3 million in infrastructure improvements are planned for 2022 in the Los Osos service area.

The 2022 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 2022.

Current & Upcoming Projects

This section is currently under construction. Please check regularly for the latest updates!

Recently Completed Projects

outline of San Luis Obispo County Project

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.