What was found in ZIP 91401
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 980000 µg/L 9800% of the EPA limit, in the worst sample — 10000 µg/L | 2/2 | SYR4 |
| Nitrate | 14125 µg/L 141% of the EPA limit, in the worst sample — 10000 µg/L | 2/2 | SYR4 |
| Fluoride | 1560 µg/L 39% of the EPA limit 4000 µg/L | 1/2 | SYR4 |
| Copper | 399 µg/L 31% of the EPA limit 1300 µg/L | 2/2 | SYR4 |
| Chromium | 348 µg/L 348% of the EPA limit, in the worst sample — 100 µg/L | 2/2 | SYR4 |
| Trichloroethylene | 322 µg/L 6440% of the EPA limit, in the worst sample — 5 µg/L | 1/2 | SYR4 |
| Barium | 218 µg/L 11% of the EPA limit 2000 µg/L | 1/2 | SYR4 |
| TTHM | 214.08 µg/L 268% of the EPA limit, in the worst sample — 80 µg/L | 2/2 | SYR4 |
| Lead | 123 µg/L 820% of the EPA limit, in the worst sample — 15 µg/L | 2/2 | SYR4 |
| Lithium | 100 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 85 µg/L 142% of the EPA limit, in the worst sample — 60 µg/L | 1/2 | SYR4 |
| Tetrachloroethylene | 67.3 µg/L 1346% of the EPA limit, in the worst sample — 5 µg/L | 1/2 | SYR4 |
| Combined Uranium | 30.9473 µg/L 103% of the EPA limit, in the worst sample — 30 µg/L | 1/2 | SYR4 |
| Selenium | 22.4 µg/L 45% of the EPA limit 50 µg/L | 1/2 | SYR4 |
| Arsenic | 20.2 µg/L 202% of the EPA limit, in the worst sample — 10 µg/L | 1/2 | SYR4 |
| Bromoform | 17.4 µg/L No EPA limit set | 1/2 | SYR4 |
| 1,1-Dichloroethylene | 15.9 µg/L 227% of the EPA limit, in the worst sample — 7 µg/L | 1/2 | SYR4 |
| Gross Beta Particle Activity | 14 pCi/L No EPA limit set | 2/2 | SYR4 |
| Bromate | 11.9 µg/L 119% of the EPA limit, in the worst sample — 10 µg/L | 1/2 | SYR4 |
| cis-1,2-Dichloroethylene | 7.46 µg/L 11% of the EPA limit 70 µg/L | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.4 pCi/L 29% of the EPA limit 15 pCi/L | 1/2 | SYR4 |
| Carbon Tetrachloride | 2.96 µg/L 59% of the EPA limit 5 µg/L | 1/2 | SYR4 |
| 1,1,1-Trichloroethane | 2.13 µg/L 1.1% of the EPA limit 200 µg/L | 1/2 | SYR4 |
| Xylenes, Total | 1.89 µg/L 0% of the EPA limit 10000 µg/L | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.26 pCi/L 25% of the EPA limit 5 pCi/L | 1/2 | SYR4 |
| Cadmium | 1.2 µg/L 24% of the EPA limit 5 µg/L | 1/2 | SYR4 |
| 1,2-Dichloroethane | 0.6030 µg/L 12% of the EPA limit 5 µg/L | 1/2 | SYR4 |
| Toluene | 0.5220 µg/L 0.1% of the EPA limit 1000 µg/L | 1/2 | SYR4 |
| Nitrite | 0.0284 µg/L 0% of the EPA limit 1000 µg/L | 1/2 | SYR4 |
| Lead | 0.0107 mg/L 72% of the EPA limit 0.0150 mg/L | 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 single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
Water suppliers serving ZIP 91401
| Supplier | State | Population served |
|---|---|---|
| LOS ANGELES-CITY, DEPT. OF WATER & POWER | CA | 3,875,566 |
| KOHALA RANCH WATER CO. | HI | 850 |
Frequently asked questions about ZIP 91401 tap water
Is the tap water in ZIP 91401 safe to drink?
EPA testing detected 30 contaminants across the water suppliers serving ZIP 91401. 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 91401?
2 public water suppliers report EPA drinking-water monitoring for ZIP 91401. Each is listed above with its population served.
What contaminants are in ZIP 91401's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Copper, Chromium, and others across this ZIP's suppliers. The full list with levels and sources is above.