Public water system · CA1710005
ActiveLucerne Water Co. - Cal Water Service
At a glance
Lucerne Water Co. - Cal Water Service (PWSID CA1710005) is an active community water system in Lake County, California. It reports serving 2,129 people through 1,212 service connections. Its primary water source is surface water, and EPA lists it as privately owned. EPA's records list 4 violations for this system; 3 are health-based, and the most recent began in July 2006.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,129
Service connections
1,212
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Lucerne Water Co. - Cal Water Service compare with other water systems in Lake County?
By EPA's size categories, Lucerne Water Co. - Cal Water Service is a small system (501 to 3,300 people). Lake County has 81 active public water systems. Its population served is about 138% above the county average of 895 people per system, and accounts for 2.9% 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 Lucerne Water Co. - Cal Water Service is well 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 Lucerne Water Co. - Cal Water Service?
EPA lists Lucerne Water Co. - Cal Water Service 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 Lucerne Water Co. - Cal Water Service have drinking water violations?
EPA's records list 4 violations for this system; 3 are health-based, and the most recent began in July 2006. The violations listed here began between July 1993 and July 2006. By type: 2 required treatment not met, 1 contaminant level above the legal limit and 1 monitoring and reporting. The contaminants or rules involved are Total trihalomethanes (TTHM), Epichlorohydrin, Interim Enhanced Surface Water Treatment Rule and Lead and Copper Rule. EPA lists 4 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 |
|---|---|---|---|---|
| 2006-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2002-11-24 | Required treatment not metTreatment Techniques · code 07 | Epichlorohydrincode 2257 | Yes | Resolved |
| 2002-11-01 | Required treatment not metSingle Turbidity Exceed (Enhanced SWTR) · code 43 | Interim Enhanced Surface Water Treatment Rulecode 0300 | Yes | Resolved |
| 1993-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
All 4 violations in EPA's records, newest first.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.
Lucerne Water Co. - Cal Water Service: frequently asked questions
Who runs Lucerne Water Co. - Cal Water Service?
Lucerne Water Co. - Cal Water Service (PWSID CA1710005) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Lucerne Water Co. - Cal Water Service serve?
Lucerne Water Co. - Cal Water Service reports serving 2,129 people through 1,212 service connections in Lake County, California.
Where does Lucerne Water Co. - Cal Water Service 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 Lucerne Water Co. - Cal Water Service have any drinking water violations?
EPA's records list 4 violations for this system; 3 are health-based, and the most recent began in July 2006. 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 Lucerne Water Co. - Cal Water Service'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 4 violations for this system; 3 are health-based, and the most recent began in July 2006. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Lucerne Water Co. - Cal Water Service's water quality report?
As a community water system, Lucerne Water Co. - Cal Water Service 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, “Lucerne Water Co. - Cal Water Service, PWSID CA1710005, California”, https://aquacensus.com/water-systems/california/lucerne-water-co-cal-water-service-ca1710005 (data as of October 1, 2026).