What was found in Pico Rivera'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 | 1000000 µg/L 10000% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2013 | 2/2 | SYR4 |
| Nitrate | 5900 µg/L 59% of the EPA limit 10000 µg/L Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019 | 2/2 | SYR4 |
| Fluoride | 334 µg/L 8.4% of the EPA limit 4000 µg/L Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019
Highest in the city: 340 µg/L — PICO WD · 22,051 people · 2019 | 2/2 | SYR4 |
| Barium | 219 µg/L 11% of the EPA limit 2000 µg/L Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019 | 2/2 | SYR4 |
| TTHM | 19.265 µg/L 24% of the EPA limit 80 µg/L Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019 | 2/2 | SYR4 |
| Bromoform | 8.555 µg/L No EPA limit set Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019 | 2/2 | SYR4 |
| Combined Uranium | 7.56175 µg/L 25% of the EPA limit 30 µg/L Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019
Highest in the city: 7.8076 µg/L — PICO WD · 22,051 people · 2018 | 2/2 | SYR4 |
| Dibromochloromethane | 7.56 µg/L No EPA limit set Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019 | 2/2 | SYR4 |
| Arsenic | 6.64 µg/L 66% of the EPA limit 10 µg/L Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019 | 2/2 | SYR4 |
| Lead | 5.8 µg/L 39% of the EPA limit 15 µg/L Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019 | 1/2 | SYR4 |
| Chloroform | 4.72 µg/L No EPA limit set Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 4.2 µg/L No EPA limit set Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 4 pCi/L No EPA limit set Highest in the city: PICO WD · 22,051 people · 2018 | 1/2 | SYR4 |
| Tetrachloroethylene | 3.115 µg/L 62% of the EPA limit 5 µg/L Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019
Highest in the city: 3.68 µg/L — PICO WD · 22,051 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 3.52 µg/L No EPA limit set Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 3.52 µg/L 5.9% of the EPA limit 60 µg/L Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019 | 2/2 | SYR4 |
| Trichloroethylene | 0.5000 µg/L 10% of the EPA limit 5 µg/L Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019
Highest in the city: 1.2 µg/L — PICO WD · 22,051 people · 2019 | 2/2 | SYR4 |
| Benzo(A)Pyrene | 0.1000 µg/L 50% of the EPA limit 0.2000 µg/L Highest in the city: PICO WD · 22,051 people · 2019 | 1/2 | SYR4 |
| PFOS | 0.0300 µg/L No EPA limit set Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2024 | 2/2 | UCMR-5 |
| Pfpea | 0.0170 µg/L No EPA limit set Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2024
Highest in the city: 0.0210 µg/L — PICO WD · 22,051 people · 2024 | 2/2 | UCMR-5 |
| Pfhxa | 0.0150 µg/L No EPA limit set Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2024
Highest in the city: 0.0170 µg/L — PICO WD · 22,051 people · 2024 | 2/2 | UCMR-5 |
| PFOA | 0.0160 µg/L No EPA limit set Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2024 | 2/2 | UCMR-5 |
| Pfba | 0.0140 µg/L No EPA limit set Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2024 | 2/2 | UCMR-5 |
| Heptachlor | 0.0120 µg/L 3% of the EPA limit 0.4000 µg/L Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2019 | 1/2 | SYR4 |
| PFBS | 0.0100 µg/L No EPA limit set Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2024 | 2/2 | UCMR-5 |
| PFHXS | 0.0056 µg/L No EPA limit set Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2024
Highest in the city: 0.0057 µg/L — PICO WD · 22,051 people · 2024 | 2/2 | UCMR-5 |
| Pfda | 0.0056 µg/L No EPA limit set Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2024 | 2/2 | UCMR-5 |
| Pfhpa | 0.0041 µg/L No EPA limit set Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2024 | 2/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: PICO RIVERA - CITY, WATER DEPT. · 40,600 people · 2025 | 2/2 | 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 Pico Rivera
| Supplier | Population served |
|---|---|
| PICO RIVERA - CITY, WATER DEPT. | 40,600 |
| PICO WD | 22,051 |
Frequently asked questions about Pico Rivera tap water
Is Pico Rivera tap water safe to drink?
EPA testing detected 29 contaminants in the water serving Pico Rivera. 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 Pico Rivera?
2 public water suppliers report drinking-water monitoring for Pico Rivera, California to the EPA. Each is listed above with its population served.
What contaminants are in Pico Rivera's water?
The contaminants EPA monitoring detected in Pico Rivera 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.