What was found in ZIP 91390
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 642000 µg/L 6420% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 2/2 | SYR4 |
| Nitrate | 7210 µg/L 72% of the EPA limit 10000 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 2/2 | SYR4 |
| Fluoride | 807.2 µg/L 20% of the EPA limit 4000 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019
Highest in the ZIP: 819 µg/L — SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 2/2 | SYR4 |
| Barium | 186.6 µg/L 9.3% of the EPA limit 2000 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 2/2 | SYR4 |
| Chromium | 171.5 µg/L 172% of the EPA limit, at the 95th percentile of samples — 100 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 2/2 | SYR4 |
| Copper | 79.54 µg/L 6.1% of the EPA limit 1300 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019
Highest in the ZIP: 150 µg/L — SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 2/2 | SYR4 |
| Lithium | 100 µg/L No EPA limit set Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2024 | 2/2 | UCMR-5 |
| TTHM | 59.945 µg/L 75% of the EPA limit 80 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 52.59 µg/L 88% of the EPA limit 60 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 2/2 | SYR4 |
| Lead | 31.9 µg/L 213% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 1/2 | SYR4 |
| Trichloroethylene | 26.5 µg/L 530% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 2/2 | SYR4 |
| Bromoform | 25.05 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 22.8074 µg/L 76% of the EPA limit 30 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 2/2 | SYR4 |
| Tetrachloroethylene | 19.6 µg/L 392% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 1/2 | SYR4 |
| Selenium | 19.44 µg/L 39% of the EPA limit 50 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 18.1 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/2 | SYR4 |
| Bromate | 11.5 µg/L 115% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 1/2 | SYR4 |
| Arsenic | 10.875 µg/L 109% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 10.05 pCi/L No EPA limit set Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 10 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/2 | SYR4 |
| 1,1-Dichloroethylene | 9.116 µg/L 130% of the EPA limit, at the 95th percentile of samples — 7 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 6.8 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/2 | SYR4 |
| Chloroform | 5.2 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 4.6 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 3.575 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/2 | SYR4 |
| cis-1,2-Dichloroethylene | 3.29 µg/L 4.7% of the EPA limit 70 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 2.42 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/2 | SYR4 |
| Carbon Tetrachloride | 2.32 µg/L 46% of the EPA limit 5 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 1/2 | SYR4 |
| Dichloromethane | 1.9 µg/L 38% of the EPA limit 5 µg/L Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 1/2 | SYR4 |
| 1,1,1-Trichloroethane | 1.896 µg/L 0.9% of the EPA limit 200 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 1/2 | SYR4 |
| Xylenes, Total | 1.89 µg/L 0% of the EPA limit 10000 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.2135 pCi/L 24% of the EPA limit 5 pCi/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2018 | 1/2 | SYR4 |
| Cadmium | 1.2 µg/L 24% of the EPA limit 5 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 1/2 | SYR4 |
| Picloram | 1.1 µg/L 0.2% of the EPA limit 500 µg/L Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2018 | 1/2 | SYR4 |
| Toluene | 0.5220 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019
Highest in the ZIP: 0.9755 µg/L — SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2019 | 2/2 | SYR4 |
| 1,2-Dichloroethane | 0.5758 µg/L 12% of the EPA limit 5 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 1/2 | SYR4 |
| Nitrite | 0.0259 µg/L 0% of the EPA limit 1000 µg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2019 | 1/2 | SYR4 |
| Pfpea | 0.0226 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/2 | UCMR-5 |
| PFOA | 0.0169 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/2 | UCMR-5 |
| Pfhxa | 0.0142 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/2 | UCMR-5 |
| Pfba | 0.0133 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/2 | UCMR-5 |
| PFHXS | 0.0076 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/2 | UCMR-5 |
| PFOS | 0.0075 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/2 | UCMR-5 |
| PFBS | 0.0069 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/2 | UCMR-5 |
| Pfhpa | 0.0063 µg/L No EPA limit set Highest in the ZIP: SANTA CLARITA VALLEY WATER AGENCY · 294,090 people · 2024 | 1/2 | UCMR-5 |
| Lead | 0.0039 mg/L 26% of the EPA limit 0.0150 mg/L Main supplier: LOS ANGELES-CITY, DEPT. OF WATER & POWER · 3,875,566 people · 2023 | 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.
Water suppliers serving ZIP 91390
| Supplier | State | Population served |
|---|---|---|
| LOS ANGELES-CITY, DEPT. OF WATER & POWER | CA | 3,875,566 |
| SANTA CLARITA VALLEY WATER AGENCY | CA | 294,090 |
Frequently asked questions about ZIP 91390 tap water
Is the tap water in ZIP 91390 safe to drink?
EPA testing detected 46 contaminants across the water suppliers serving ZIP 91390. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 91390?
2 public water suppliers report EPA drinking-water monitoring for ZIP 91390. Each is listed above with its population served.
What contaminants are in ZIP 91390's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Barium, Chromium, and others across this ZIP's suppliers. The full list with levels and sources is above.