Public water system · CA1910200
ActiveSuburban Water Systems-Covina Knolls
At a glance
Suburban Water Systems-Covina Knolls (PWSID CA1910200) is an active community water system in Los Angeles County, California. It reports serving 1,437 people through 495 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's records list 2 violations for this system; all are health-based, and the most recent began in March 1996.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,437
Service connections
495
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Suburban Water Systems-Covina Knolls compare with other water systems in Los Angeles County?
By EPA's size categories, Suburban Water Systems-Covina Knolls is a small system (501 to 3,300 people). Los Angeles County has 275 active public water systems. Its population served is well below the county average of 36,762 people per system, and accounts for less than 0.1% 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 Suburban Water Systems-Covina Knolls 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. 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 Suburban Water Systems-Covina Knolls?
EPA lists Suburban Water Systems-Covina Knolls 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 Suburban Water Systems-Covina Knolls have drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in March 1996. The violations listed here began between June 1993 and March 1996. By type: 1 contaminant level above the legal limit and 1 required treatment not met. The contaminants or rules involved are Total coliform bacteria (TCR) and Surface Water Treatment Rule. EPA lists 2 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 |
|---|---|---|---|---|
| 1996-03-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-06-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
All 2 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.
Suburban Water Systems-Covina Knolls: frequently asked questions
Who runs Suburban Water Systems-Covina Knolls?
Suburban Water Systems-Covina Knolls (PWSID CA1910200) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Suburban Water Systems-Covina Knolls serve?
Suburban Water Systems-Covina Knolls reports serving 1,437 people through 495 service connections in Los Angeles County, California.
Where does Suburban Water Systems-Covina Knolls 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 Suburban Water Systems-Covina Knolls have any drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in March 1996. 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 Suburban Water Systems-Covina Knolls' 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 2 violations for this system; all are health-based, and the most recent began in March 1996. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Suburban Water Systems-Covina Knolls' water quality report?
As a community water system, Suburban Water Systems-Covina Knolls 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, “Suburban Water Systems-Covina Knolls, PWSID CA1910200, California”, https://aquacensus.com/water-systems/california/suburban-water-systems-covina-knolls-ca1910200 (data as of October 1, 2026).