What was found in Huntington Park's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 994500 µg/L 9945% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Highest in the city: MAYWOOD MUTUAL WATER CO. #1 · 5,500 people · 2017 | 2/3 | SYR4 |
| Nitrate | 917.5 µg/L 9.2% of the EPA limit 10000 µg/L Main supplier: WALNUT PARK MUTUAL WATER CO. · 16,180 people · 2019
Highest in the city: 12000 µg/L — HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 3/3 | SYR4 |
| Fluoride | 396.5 µg/L 9.9% of the EPA limit 4000 µg/L Main supplier: WALNUT PARK MUTUAL WATER CO. · 16,180 people · 2018
Highest in the city: 540 µg/L — MAYWOOD MUTUAL WATER CO. #1 · 5,500 people · 2018 | 3/3 | SYR4 |
| Barium | 186.5 µg/L 9.3% of the EPA limit 2000 µg/L Highest in the city: MAYWOOD MUTUAL WATER CO. #1 · 5,500 people · 2018 | 2/3 | SYR4 |
| TTHM | 4.755 µg/L 5.9% of the EPA limit 80 µg/L Main supplier: WALNUT PARK MUTUAL WATER CO. · 16,180 people · 2019
Highest in the city: 60.655 µg/L — HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 3/3 | SYR4 |
| Lithium | 54 µg/L No EPA limit set Highest in the city: HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2024 | 2/3 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 1.62 µg/L 2.7% of the EPA limit 60 µg/L Main supplier: WALNUT PARK MUTUAL WATER CO. · 16,180 people · 2019
Highest in the city: 21.85 µg/L — HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 2.185 µg/L No EPA limit set Main supplier: WALNUT PARK MUTUAL WATER CO. · 16,180 people · 2019
Highest in the city: 21.21 µg/L — HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 3/3 | SYR4 |
| Chloroform | 1 µg/L No EPA limit set Main supplier: WALNUT PARK MUTUAL WATER CO. · 16,180 people · 2019
Highest in the city: 19.72 µg/L — HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 1.74 µg/L No EPA limit set Main supplier: WALNUT PARK MUTUAL WATER CO. · 16,180 people · 2019
Highest in the city: 16.5 µg/L — HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 3/3 | SYR4 |
| Combined Uranium | 5.6918 µg/L 19% of the EPA limit 30 µg/L Main supplier: WALNUT PARK MUTUAL WATER CO. · 16,180 people · 2019
Highest in the city: 14.1624 µg/L — HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 3/3 | SYR4 |
| Bromoform | 2.5 µg/L No EPA limit set Main supplier: WALNUT PARK MUTUAL WATER CO. · 16,180 people · 2019
Highest in the city: 13.055 µg/L — MAYWOOD MUTUAL WATER CO. #1 · 5,500 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 12.1 µg/L No EPA limit set Highest in the city: MAYWOOD MUTUAL WATER CO. #1 · 5,500 people · 2019 | 2/3 | SYR4 |
| Trichloroacetic Acid | 6.7 µg/L No EPA limit set Highest in the city: HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 2/3 | SYR4 |
| Selenium | 6.655 µg/L 13% of the EPA limit 50 µg/L Highest in the city: HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1.62 µg/L No EPA limit set Main supplier: WALNUT PARK MUTUAL WATER CO. · 16,180 people · 2019
Highest in the city: 6.6 µg/L — HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 3/3 | SYR4 |
| Carbon Tetrachloride | 3.15 µg/L 63% of the EPA limit 5 µg/L Highest in the city: HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 1/3 | SYR4 |
| Arsenic | 2.89 µg/L 29% of the EPA limit 10 µg/L Highest in the city: HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 1/3 | SYR4 |
| Monochloroacetic Acid | 2.49 µg/L No EPA limit set Highest in the city: HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 1/3 | SYR4 |
| Trichloroethylene | 2.255 µg/L 45% of the EPA limit 5 µg/L Highest in the city: HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.3 µg/L No EPA limit set Highest in the city: HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 1/3 | SYR4 |
| Tetrachloroethylene | 1.1 µg/L 22% of the EPA limit 5 µg/L Highest in the city: HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2019 | 1/3 | SYR4 |
| PFOS | 0.0230 µg/L No EPA limit set Highest in the city: HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2024 | 2/3 | UCMR-5 |
| PFHXS | 0.0051 µg/L No EPA limit set Highest in the city: HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2024 | 1/3 | UCMR-5 |
| PFOA | 0.0051 µg/L No EPA limit set Highest in the city: HUNTINGTON PARK-CITY, WATER DEPT. · 15,437 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: WALNUT PARK MUTUAL WATER CO. · 16,180 people · 2023 | 3/3 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Huntington Park
| Supplier | Population served |
|---|---|
| WALNUT PARK MUTUAL WATER CO. | 16,180 |
| HUNTINGTON PARK-CITY, WATER DEPT. | 15,437 |
| MAYWOOD MUTUAL WATER CO. #1 | 5,500 |
Frequently asked questions about Huntington Park tap water
Is Huntington Park tap water safe to drink?
EPA testing detected 26 contaminants in the water serving Huntington Park. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Huntington Park?
3 public water suppliers report drinking-water monitoring for Huntington Park, California to the EPA. Each is listed above with its population served.
What contaminants are in Huntington Park's water?
The contaminants EPA monitoring detected in Huntington Park include Nitrate-Nitrite, Nitrate, Fluoride, Barium, TTHM. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.