Public water system · CA1910240
ActiveSanta Clarita Valley Water Agency
At a glance
Santa Clarita Valley Water Agency (PWSID CA1910240) is an active community water system in Los Angeles County, California. It reports serving 294,090 people through 75,864 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 September 1993.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
294,090
Service connections
75,864
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Santa Clarita Valley Water Agency compare with other water systems in Los Angeles County?
By EPA's size categories, Santa Clarita Valley Water Agency is a very large system (more than 100,000 people). Los Angeles County has 275 active public water systems, and Santa Clarita Valley Water Agency is the 3rd-largest of them by population served. Its population served is about 8 times the county average of 36,762 people per system, and accounts for 2.9% 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 Santa Clarita Valley Water Agency is about 44 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. 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 Santa Clarita Valley Water Agency?
EPA lists Santa Clarita Valley Water Agency 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. 150 of the 275 active systems in Los Angeles County (55%) are also privately owned.
Does Santa Clarita Valley Water Agency have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in September 1993. 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 |
|---|---|---|---|---|
| 1993-09-01 | 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.
Santa Clarita Valley Water Agency: frequently asked questions
Who runs Santa Clarita Valley Water Agency?
Santa Clarita Valley Water Agency (PWSID CA1910240) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Santa Clarita Valley Water Agency serve?
Santa Clarita Valley Water Agency reports serving 294,090 people through 75,864 service connections in Los Angeles County, California.
Where does Santa Clarita Valley Water Agency 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 Santa Clarita Valley Water Agency have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in September 1993. 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 Santa Clarita Valley Water Agency'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 September 1993. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Santa Clarita Valley Water Agency's water quality report?
As a community water system, Santa Clarita Valley Water Agency 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 |
| 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 |
| Glendale-City, Water Dept. | Los Angeles | 188,784 | 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, “Santa Clarita Valley Water Agency, PWSID CA1910240, California”, https://aquacensus.com/water-systems/california/santa-clarita-valley-water-agency-ca1910240 (data as of October 1, 2026).