Public water system · CA0110003
ActiveCalifornia Water Service - Livermore
At a glance
California Water Service - Livermore (PWSID CA0110003) is an active community water system in Alameda County, California. It reports serving 60,414 people through 18,595 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
60,414
Service connections
18,595
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does California Water Service - Livermore compare with other water systems in Alameda County?
By EPA's size categories, California Water Service - Livermore is a large system (10,001 to 100,000 people). Alameda County has 27 active public water systems, and California Water Service - Livermore is the 6th-largest of them by population served. Its population served is about 27% below the county average of 83,320 people per system, and accounts for 2.7% of the 2,249,634 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 California Water Service - Livermore is about 9 times 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 506 California systems (6.8%) list purchased surface water as their primary source.
Who owns and regulates California Water Service - Livermore?
EPA lists California Water Service - Livermore 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. 8 of the 27 active systems in Alameda County (30%) are also privately owned.
Does California Water Service - Livermore 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 California Water Service - Livermore. For the latest compliance status, check EPA ECHO for current compliance history.
California Water Service - Livermore: frequently asked questions
Who runs California Water Service - Livermore?
California Water Service - Livermore (PWSID CA0110003) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does California Water Service - Livermore serve?
California Water Service - Livermore reports serving 60,414 people through 18,595 service connections in Alameda County, California.
Where does California Water Service - Livermore get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does California Water Service - Livermore have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is California Water Service - Livermore'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 California Water Service - Livermore's water quality report?
As a community water system, California Water Service - Livermore 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 Alameda County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| East Bay MUD | Alameda | 1,442,800 | Community | Surface water |
| Alameda County Water District | Alameda | 344,000 | Community | Surface water |
| City of Hayward | Alameda | 162,954 | Community | Purchased surface water |
| Dublin San Ramon Services District | Alameda | 98,776 | Community | Purchased surface water |
| City of Pleasanton | Alameda | 76,689 | Community | Purchased surface water |
| City of Livermore | Alameda | 38,892 | Community | Purchased 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, “California Water Service - Livermore, PWSID CA0110003, California”, https://aquacensus.com/water-systems/california/california-water-service-livermore-ca0110003 (data as of October 1, 2026).