Public water system · CA1910144
ActiveSan Gabriel County Wd
At a glance
San Gabriel County Wd (PWSID CA1910144) is an active community water system in Los Angeles County, California. It reports serving 39,345 people through 9,693 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
39,345
Service connections
9,693
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does San Gabriel County Wd compare with other water systems in Los Angeles County?
By EPA's size categories, San Gabriel County Wd is a large system (10,001 to 100,000 people). Los Angeles County has 275 active public water systems. Its population served is roughly in line with the county average of 36,762 people per system, and accounts for 0.4% of the 10,109,668 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 San Gabriel County Wd is about 5.9 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. 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 San Gabriel County Wd?
EPA lists San Gabriel County Wd 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. 100 of the 275 active systems in Los Angeles County (36%) are also owned by a local government.
Does San Gabriel County Wd 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 San Gabriel County Wd. For the latest compliance status, check EPA ECHO for current compliance history.
San Gabriel County Wd: frequently asked questions
Who runs San Gabriel County Wd?
San Gabriel County Wd (PWSID CA1910144) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does San Gabriel County Wd serve?
San Gabriel County Wd reports serving 39,345 people through 9,693 service connections in Los Angeles County, California.
Where does San Gabriel County Wd 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 San Gabriel County Wd have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is San Gabriel County Wd'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 San Gabriel County Wd's water quality report?
As a community water system, San Gabriel County Wd 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 Los Angeles County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Los Angeles-City, Dept. of Water & Power | Los Angeles | 3,875,566 | Community | Surface water |
| Long Beach Utilities Department | Los Angeles | 466,772 | Community | Purchased surface water |
| Santa Clarita Valley Water Agency | Los Angeles | 294,090 | Community | Surface water |
| Gswc - Southwest | Los Angeles | 277,740 | Community | Purchased surface water |
| San Gabriel Valley Water Co.-El Monte | Los Angeles | 248,000 | Community | Groundwater |
| Los Angeles Cwwd 40 Reg 4 & 34 Lancaster | Los Angeles | 208,129 | 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, “San Gabriel County Wd, PWSID CA1910144, California”, https://aquacensus.com/water-systems/california/san-gabriel-county-wd-ca1910144 (data as of October 1, 2026).