El Monte Water Quality
California
The tap water in El Monte, California is served by 8 EPA-regulated water systems covering approximately 289,546 people. 63 health-based violations are on record, most recently for 1005 in 2025. Data source: EPA Safe Drinking Water Information System.
Drinking water in El Monte, California is delivered through 8 EPA-regulated community water systems serving an estimated 289,546 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
The SDWIS record for El Monte shows 63 total violations across all 8 systems, of which 63 are health-based, meaning either a Maximum Contaminant Level (MCL) was exceeded or a required treatment technique was not followed. Contaminants cited in health-based violations include 1005, 5200, 3000, 0700. 1 TRI-reporting industrial facility is also located within the city limits.
A past EPA violation does not mean the water is currently unsafe, utilities are required to notify customers and remediate under state primacy oversight. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the California drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| SAN GABRIEL VALLEY WATER CO.-EL MONTE | 248,000 | 6 | Health |
| EL MONTE-CITY, WATER DEPT. | 22,968 | 0 | Clean |
| SAN GABRIEL VALLEY WATER CO-MONTEBELLO 1 | 9,630 | 0 | Clean |
| SAN GABRIEL VALLEY WATER CO-MONTEBELLO 2 | 7,330 | 0 | Clean |
| DEL RIO MUTUAL | 700 | 1 | Health |
| HEMLOCK MUTUAL WATER CO. | 686 | 1 | Health |
| STERLING MUTUAL WATER COMPANY | 198 | 6 | Health |
| SUNNY ROAD WATER SYSTEM | 34 | 49 | Health |
Does this city have health-based water violations?
Health-based violations indicate contaminant levels that exceeded EPA maximum contaminant levels (MCLs). This does not necessarily mean water is currently unsafe.
| Contaminant | Begin Date |
|---|---|
| 1005 | 2025-07-01 |
| 1005 | 2025-04-01 |
| 1005 | 2025-01-01 |
| 5200 | 2024-10-17 |
| 5200 | 2024-10-17 |
| 5200 | 2024-10-17 |
| 1005 | 2024-10-01 |
| 1005 | 2024-07-01 |
| 1005 | 2024-07-01 |
| 1005 | 2024-07-01 |
| 1005 | 2024-04-01 |
| 1005 | 2024-04-01 |
| 1005 | 2024-01-01 |
| 1005 | 2024-01-01 |
| 1005 | 2024-01-01 |
| 1005 | 2023-10-01 |
| 1005 | 2023-10-01 |
| 1005 | 2023-07-01 |
| 1005 | 2023-07-01 |
| 1005 | 2023-04-01 |
| 1005 | 2023-04-01 |
| 1005 | 2023-01-01 |
| 1005 | 2023-01-01 |
| 1005 | 2022-10-01 |
| 1005 | 2022-10-01 |
| 1005 | 2022-07-01 |
| 1005 | 2022-07-01 |
| 1005 | 2022-04-01 |
| 1005 | 2022-04-01 |
| 3000 | 2022-01-01 |
| 3000 | 2022-01-01 |
| 3000 | 2022-01-01 |
| 1005 | 2022-01-01 |
| 1005 | 2021-10-01 |
| 1005 | 2021-04-01 |
| 1005 | 2021-01-01 |
| 1005 | 2020-10-01 |
| 3000 | 2020-08-01 |
| 3000 | 2020-08-01 |
| 1005 | 2020-07-01 |
| 1005 | 2020-04-01 |
| 1005 | 2020-01-01 |
| 1005 | 2019-10-01 |
| 1005 | 2019-07-01 |
| 0700 | 2019-06-01 |
| 0700 | 2019-06-01 |
| 0700 | 2019-06-01 |
| 1005 | 2019-04-01 |
| 1005 | 2019-01-01 |
| 1005 | 2018-10-01 |
TRI Facilities in El Monte
| Facility | Total Releases |
|---|---|
| The Gill Corp | 40.0K lbs |
Frequently Asked Questions
Is El Monte, California water safe to drink? ▼
How many water violations does El Monte have? ▼
What contaminants were found in El Monte water? ▼
How many water systems serve El Monte? ▼
Where does El Monte get its drinking water? ▼
Are there pollution sources near El Monte? ▼
About This Data
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). Violations are reported by state agencies to EPA and include both health-based (MCL exceedances) and monitoring/reporting violations.
A reported violation does not necessarily mean water is currently unsafe to drink. Many violations are resolved quickly, and public water systems are required to notify customers of significant issues. For current water quality, contact your local water utility.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.