Public water system · CA1910042
ActivePico Rivera - City, Water Dept.
At a glance
Pico Rivera - City, Water Dept. (PWSID CA1910042) is an active community water system in Los Angeles County, California. It reports serving 40,600 people through 9,474 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in November 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
40,600
Service connections
9,474
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Pico Rivera - City, Water Dept. compare with other water systems in Los Angeles County?
By EPA's size categories, Pico Rivera - City, Water Dept. is a large system (10,001 to 100,000 people). Los Angeles County has 275 active public water systems. Its population served is about 10% above 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 Pico Rivera - City, Water Dept. is about 6.1 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 Pico Rivera - City, Water Dept.?
EPA lists Pico Rivera - City, Water Dept. 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 Pico Rivera - City, Water Dept. have drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in November 2022. The violations listed here began between July 1994 and November 2022. By type: 4 monitoring and reporting, 2 contaminant level above the legal limit and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 7 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 |
|---|---|---|---|---|
| 2022-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2021-08-17 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2003-11-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1999-01-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1994-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 7 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.
Pico Rivera - City, Water Dept.: frequently asked questions
Who runs Pico Rivera - City, Water Dept.?
Pico Rivera - City, Water Dept. (PWSID CA1910042) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Pico Rivera - City, Water Dept. serve?
Pico Rivera - City, Water Dept. reports serving 40,600 people through 9,474 service connections in Los Angeles County, California.
Where does Pico Rivera - City, Water Dept. 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 Pico Rivera - City, Water Dept. have any drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in November 2022. 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 Pico Rivera - City, Water Dept.'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 7 violations for this system; 2 are health-based, and the most recent began in November 2022. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Pico Rivera - City, Water Dept.'s water quality report?
As a community water system, Pico Rivera - City, Water Dept. 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, “Pico Rivera - City, Water Dept., PWSID CA1910042, California”, https://aquacensus.com/water-systems/california/pico-rivera-city-water-dept-ca1910042 (data as of October 1, 2026).