Los Angeles Water Quality
California
According to EPA SDWIS, Los Angeles, California is served by 22 community water systems covering about 3,970,971 people. The same extract lists 98 health-based violation records, most recently coded 1005 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Los Angeles, California is delivered through 22 EPA-regulated community water systems serving an estimated 3,970,971 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.
PlainEnviro's health-based SDWIS extract shows 98 violation records across the 22 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 7 distinct EPA contaminant codes: Arsenic, LEAD AND COPPER RULE REVISIONS, Groundwater Rule, Stage 1 Disinfectants and Disinfection Byproducts Rule, Long Term 2 Enhanced Surface Water Treatment Rule and 2 others. 42 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. 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 | 10 | Health |
| SANTA MONICA-CITY, WATER DIVISION | 89,947 | 0 | Clean |
| 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 |
| COUNTRY VIEW MOBILE HOME COMMUNITY LLC | 80 | 6 | Health |
| GOLDEN VALLEY MOBILE HOME PARK | 80 | 0 | Clean |
| KERN MOBILE ESTATES LLC | 73 | 79 | 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 |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| KERN MOBILE ESTATES LLC | Arsenic | 2025-10-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2025-07-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2025-04-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2025-01-01 |
| COUNTRY VIEW MOBILE HOME COMMUNITY LLC | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| KERN MOBILE ESTATES LLC | Arsenic | 2024-10-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2024-10-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2024-07-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2024-07-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2024-04-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2024-04-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2024-01-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2024-01-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2023-10-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2023-10-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2023-07-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2023-07-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2023-04-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2023-04-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2023-01-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2023-01-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2022-10-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2022-10-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2022-07-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2022-07-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2022-04-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2022-04-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2022-01-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2021-10-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2021-07-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2021-04-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2021-01-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2020-10-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2020-07-01 |
| COUNTRY VIEW MOBILE HOME COMMUNITY LLC | Groundwater Rule | 2020-05-02 |
| COUNTRY VIEW MOBILE HOME COMMUNITY LLC | Groundwater Rule | 2020-05-02 |
| COUNTRY VIEW MOBILE HOME COMMUNITY LLC | Groundwater Rule | 2020-04-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2020-01-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2019-10-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2019-07-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2019-04-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2019-01-01 |
| VISTA VILLAGE MHP | Stage 1 Disinfectants and Disinfection Byproducts Rule | 2018-11-04 |
| KERN MOBILE ESTATES LLC | Arsenic | 2018-10-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2018-07-01 |
| KERN MOBILE ESTATES LLC | Arsenic | 2018-04-01 |
| LOS ANGELES-CITY, DEPT. OF WATER & POWER | Long Term 2 Enhanced Surface Water Treatment Rule | 2018-01-01 |
| LOS ANGELES-CITY, DEPT. OF WATER & POWER | Long Term 2 Enhanced Surface Water Treatment Rule | 2018-01-01 |
| LOS ANGELES-CITY, DEPT. OF WATER & POWER | Long Term 2 Enhanced Surface Water Treatment Rule | 2018-01-01 |
| LOS ANGELES-CITY, DEPT. OF WATER & POWER | Long Term 2 Enhanced Surface Water Treatment Rule | 2018-01-01 |
What are Los Angeles's health-based records for?
Los Angeles's health-based violation records carry 7 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Arsenic | 79 | 1 |
| Groundwater Rule | 8 | 2 |
| Long Term 2 Enhanced Surface Water Treatment Rule | 5 | 1 |
| Surface Water Treatment Rule | 2 | 2 |
| Coliform (TCR) | 2 | 1 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 1 | 1 |
| Lead and Copper Rule Revisions | 1 | 1 |
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
What does EPA SDWIS list for drinking water in Los Angeles, California? ▼
How many water violations does Los Angeles have in this EPA extract? ▼
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? ▼
How does Los Angeles compare in California?
Of the 909 California places with at least one community water system on file, Los Angeles ranks #11 by number of systems (22).
Either side of it: Chico (28), Bishop (24), Hollister (21), Red Bluff (20)
About This Data
Figures here are the current EPA SDWIS extract joined to the 22 community water systems whose service area lists Los Angeles, ranked against the 909 California places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
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.