Los Angeles Water Quality
California
The tap water in Los Angeles, California is served by 26 EPA-regulated water systems covering approximately 4,033,386 people. 94 health-based violations are on record, most recently for 1005 in 2025. Data source: EPA Safe Drinking Water Information System.
Drinking water in Los Angeles, California is delivered through 26 EPA-regulated community water systems serving an estimated 4,033,386 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 Los Angeles shows 94 total violations across all 26 systems, of which 94 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, 0700, 0400, 0800 and 2 others. 42 TRI-reporting industrial facilities are 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 |
|---|---|---|---|
| LOS ANGELES-CITY, DEPT. OF WATER & POWER | 3,875,566 | 8 | Health |
| SANTA MONICA-CITY, WATER DIVISION | 89,947 | 0 | Clean |
| MONTEREY PARK-CITY, WATER DEPT. | 62,183 | 1 | Health |
| LAKE PARK VILLAGE CONDOMINIUMS | 900 | 0 | Clean |
| QUAIL HILL MOBILE HOME PARK | 878 | 0 | Clean |
| WOODSHIRE EAST MOBILE HOME PARK LTD | 751 | 0 | Clean |
| VISTA VILLAGE MHP | 750 | 1 | Health |
| GLENWOOD MOBILE ESTATES | 468 | 0 | Clean |
| MOUNTAIN VIEW TRAILER COURT | 320 | 0 | Clean |
| BROOKVIEW MHP | 300 | 0 | Clean |
| MUSCATINE MHP LLC | 245 | 0 | Clean |
| STONEGATE MOBILE HOME PARK | 196 | 0 | Clean |
| GROVE ESTATES MHP | 162 | 0 | Clean |
| SUBURBAN ESTATES MHP | 150 | 0 | Clean |
| FIRE SUPPRESSION CAMP #19 | 125 | 0 | Clean |
| CALIFORNIA CONSERVATION CAMP #14 | 107 | 0 | Clean |
| COUNTRY VIEW MOBILE HOME COMMUNITY LLC | 80 | 6 | Health |
| GOLDEN VALLEY MOBILE HOME PARK | 80 | 0 | Clean |
| KERN MOBILE ESTATES LLC | 73 | 76 | Health |
| LOS ANGELES, CITY OF - POWER PLANT #2 | 44 | 1 | Health |
| CONTROL GORGE POWER PLANT LADWP | 32 | 0 | Clean |
| LOS ANGELES, CITY OF - POWER PLANT #1 | 29 | 1 | Health |
| LADWP - INDEPENDENCE | 0 | 0 | Clean |
| LADWP - LONE PINE | 0 | 0 | Clean |
| LADWP - BIG PINE | 0 | 0 | Clean |
| LADWP - MANZANAR | 0 | 0 | Clean |
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 | 2025-04-01 |
| 1005 | 2025-01-01 |
| 5200 | 2024-10-17 |
| 5200 | 2024-10-17 |
| 1005 | 2024-10-01 |
| 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 | 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 |
| 1005 | 2022-01-01 |
| 1005 | 2021-10-01 |
| 1005 | 2021-07-01 |
| 1005 | 2021-04-01 |
| 1005 | 2021-01-01 |
| 1005 | 2020-10-01 |
| 1005 | 2020-07-01 |
| 0700 | 2020-05-02 |
| 0700 | 2020-05-02 |
| 0700 | 2020-04-01 |
| 1005 | 2020-01-01 |
| 1005 | 2019-10-01 |
| 1005 | 2019-07-01 |
| 1005 | 2019-04-01 |
| 1005 | 2019-01-01 |
| 0400 | 2018-11-04 |
| 1005 | 2018-10-01 |
| 1005 | 2018-07-01 |
| 1005 | 2018-04-01 |
| 0800 | 2018-01-01 |
| 0800 | 2018-01-01 |
| 0800 | 2018-01-01 |
| 0800 | 2018-01-01 |
| 1005 | 2018-01-01 |
| 1005 | 2017-10-01 |
TRI Facilities in Los Angeles
| Facility | Total Releases |
|---|---|
| Alloys Cleaning Inc | 582.4K lbs |
| George Industries | 522.8K lbs |
| Industrial Service Oil Co | 308.4K lbs |
| Berg Lacquer Co | 232.1K lbs |
| Baxalta US Inc. Part of the Takeda Group | 207.4K lbs |
| Smithfield Packaged Meats Corp. | 177.7K lbs |
| V & M Aerospace | 113.9K lbs |
| Evonik Corp | 96.7K lbs |
| Fabri Cote | 85.3K lbs |
| Amvac Chemical Corp | 34.0K lbs |
Frequently Asked Questions
Is Los Angeles, California water safe to drink? ▼
How many water violations does Los Angeles have? ▼
What contaminants were found in Los Angeles water? ▼
How many water systems serve Los Angeles? ▼
Where does Los Angeles get its drinking water? ▼
Are there pollution sources near Los Angeles? ▼
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.