What was found in Newhall'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 | 6102 µg/L 61% of the EPA limit 10000 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 5600 µg/L 56% of the EPA limit 10000 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Fluoride | 819 µg/L 20% of the EPA limit 4000 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Copper | 150 µg/L 12% of the EPA limit 1300 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Barium | 118 µg/L 5.9% of the EPA limit 2000 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Lithium | 53.1 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/1 | UCMR-5 |
| TTHM | 46 µg/L 57% of the EPA limit 80 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Chromium | 34 µg/L 34% of the EPA limit 100 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Bromoform | 25.05 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 18.1 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 10.45 µg/L 17% of the EPA limit 60 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 10 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Selenium | 8.81 µg/L 18% of the EPA limit 50 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 8.493 µg/L 28% of the EPA limit 30 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 6.8 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Gross Beta Particle Activity | 6.72 pCi/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Chloroform | 5.2 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 4.6 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Arsenic | 4.47 µg/L 45% of the EPA limit 10 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 3.575 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 2.42 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Dichloromethane | 1.9 µg/L 38% of the EPA limit 5 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Picloram | 1.1 µg/L 0.2% of the EPA limit 500 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2018 | 1/1 | SYR4 |
| Toluene | 0.9755 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Trichloroethylene | 0.8760 µg/L 18% of the EPA limit 5 µg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/1 | SYR4 |
| Pfpea | 0.0226 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/1 | UCMR-5 |
| PFOA | 0.0169 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/1 | UCMR-5 |
| Pfhxa | 0.0142 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/1 | UCMR-5 |
| Pfba | 0.0133 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/1 | UCMR-5 |
| PFHXS | 0.0076 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/1 | UCMR-5 |
| PFOS | 0.0075 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/1 | UCMR-5 |
| PFBS | 0.0069 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/1 | UCMR-5 |
| Pfhpa | 0.0063 µg/L No EPA limit set Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2025 | 1/1 | 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 Newhall
| Supplier | Population served |
|---|---|
| SANTA CLARITA VALLEY WATER AGENCY | 294,090 |
Frequently asked questions about Newhall tap water
Is Newhall tap water safe to drink?
EPA testing detected 34 contaminants in the water serving Newhall. 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 Newhall?
1 public water supplier report drinking-water monitoring for Newhall, California to the EPA. Each is listed above with its population served.
What contaminants are in Newhall's water?
The contaminants EPA monitoring detected in Newhall include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. 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.