Public water system · CA1710002
ActiveGolden State Water Co.-Clearlake System
At a glance
Golden State Water Co.-Clearlake System (PWSID CA1710002) is an active community water system in Lake County, California. It reports serving 4,644 people through 2,132 service connections. Its primary water source is surface water, and EPA lists it as privately owned. EPA's records list one violation for this system; it is health-based, and the most recent began in November 1994.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,644
Service connections
2,132
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Golden State Water Co.-Clearlake System compare with other water systems in Lake County?
By EPA's size categories, Golden State Water Co.-Clearlake System is a medium system (3,301 to 10,000 people). Lake County has 81 active public water systems, and Golden State Water Co.-Clearlake System is the 5th-largest of them by population served. Its population served is about 5.2 times the county average of 895 people per system, and accounts for 6.4% of the 72,454 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active community water system reports serving 6,703 people, so Golden State Water Co.-Clearlake System is about 31% below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. California has 2,997 active community water systems, 40% of the state's 7,479 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 609 California systems (8.1%) list surface water as their primary source.
Who owns and regulates Golden State Water Co.-Clearlake System?
EPA lists Golden State Water Co.-Clearlake System as privately owned. The CA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 60 of the 81 active systems in Lake County (74%) are also privately owned.
Does Golden State Water Co.-Clearlake System have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in November 1994. By type: 1 contaminant level above the legal limit. The contaminant or rule involved is Total coliform bacteria (TCR). EPA lists 1 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 1994-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
The one violation in EPA's records.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Golden State Water Co.-Clearlake System: frequently asked questions
Who runs Golden State Water Co.-Clearlake System?
Golden State Water Co.-Clearlake System (PWSID CA1710002) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Golden State Water Co.-Clearlake System serve?
Golden State Water Co.-Clearlake System reports serving 4,644 people through 2,132 service connections in Lake County, California.
Where does Golden State Water Co.-Clearlake System get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Golden State Water Co.-Clearlake System have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in November 1994. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Golden State Water Co.-Clearlake System's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list one violation for this system; it is health-based, and the most recent began in November 1994. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Golden State Water Co.-Clearlake System's water quality report?
As a community water system, Golden State Water Co.-Clearlake System must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Lake County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Highlands Mutual Water Company | Lake | 7,772 | Community | Surface water |
| Hidden Valley Lake Csd | Lake | 6,235 | Community | Groundwater |
| Konocti County Water District | Lake | 5,928 | Community | Surface water |
| Lakeport, City of | Lake | 4,762 | Community | Surface water |
| Mt. Konocti Mutual Water Company | Lake | 4,360 | Community | Surface water |
| Kelseyville Co Waterworks District 3 | Lake | 4,102 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Golden State Water Co.-Clearlake System, PWSID CA1710002, California”, https://aquacensus.com/water-systems/california/golden-state-water-co-clearlake-system-ca1710002 (data as of October 1, 2026).