Public water system · CA1710007
ActiveKelseyville Co Waterworks District 3
At a glance
Kelseyville Co Waterworks District 3 (PWSID CA1710007) is an active community water system in Lake County, California. It reports serving 4,102 people through 1,250 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,102
Service connections
1,250
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Kelseyville Co Waterworks District 3 compare with other water systems in Lake County?
By EPA's size categories, Kelseyville Co Waterworks District 3 is a medium system (3,301 to 10,000 people). Lake County has 81 active public water systems. Its population served is about 4.6 times the county average of 895 people per system, and accounts for 5.7% 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 Kelseyville Co Waterworks District 3 is about 39% 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,179 California systems (83%) list groundwater as their primary source.
Who owns and regulates Kelseyville Co Waterworks District 3?
EPA lists Kelseyville Co Waterworks District 3 as owned by a local government. 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. 17 of the 81 active systems in Lake County (21%) are also owned by a local government.
Does Kelseyville Co Waterworks District 3 have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Kelseyville Co Waterworks District 3. For the latest compliance status, check EPA ECHO for current compliance history.
Kelseyville Co Waterworks District 3: frequently asked questions
Who runs Kelseyville Co Waterworks District 3?
Kelseyville Co Waterworks District 3 (PWSID CA1710007) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Kelseyville Co Waterworks District 3 serve?
Kelseyville Co Waterworks District 3 reports serving 4,102 people through 1,250 service connections in Lake County, California.
Where does Kelseyville Co Waterworks District 3 get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Kelseyville Co Waterworks District 3 have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Kelseyville Co Waterworks District 3'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 Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Kelseyville Co Waterworks District 3's water quality report?
As a community water system, Kelseyville Co Waterworks District 3 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 |
| Golden State Water Co.-Clearlake System | Lake | 4,644 | Community | Surface water |
| Mt. Konocti Mutual Water Company | Lake | 4,360 | Community | Surface water |
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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, “Kelseyville Co Waterworks District 3, PWSID CA1710007, California”, https://aquacensus.com/water-systems/california/kelseyville-co-waterworks-district-3-ca1710007 (data as of October 1, 2026).