What was found in ZIP 92407
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 | 920000 µg/L 9200% of the EPA limit, in the worst sample — 10000 µg/L | 3/3 | SYR4 |
| Nitrate | 18000 µg/L 180% of the EPA limit, in the worst sample — 10000 µg/L | 3/3 | SYR4 |
| Fluoride | 1700 µg/L 43% of the EPA limit 4000 µg/L | 3/3 | SYR4 |
| Copper | 430 µg/L 33% of the EPA limit 1300 µg/L | 2/3 | SYR4 |
| TTHM | 95.6 µg/L 119% of the EPA limit, in the worst sample — 80 µg/L | 3/3 | SYR4 |
| Lead | 40 µg/L 267% of the EPA limit, in the worst sample — 15 µg/L | 1/3 | SYR4 |
| Dibromochloromethane | 36.1 µg/L No EPA limit set | 3/3 | SYR4 |
| Chloroform | 33 µg/L No EPA limit set | 3/3 | SYR4 |
| Bromoform | 31.7 µg/L No EPA limit set | 3/3 | SYR4 |
| Combined Uranium | 28.757 µg/L 96% of the EPA limit 30 µg/L | 3/3 | SYR4 |
| Bromodichloromethane | 25.8 µg/L No EPA limit set | 3/3 | SYR4 |
| Arsenic | 19 µg/L 190% of the EPA limit, in the worst sample — 10 µg/L | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 19 µg/L 32% of the EPA limit 60 µg/L | 3/3 | SYR4 |
| Dichloroacetic Acid | 11.8 µg/L No EPA limit set | 3/3 | SYR4 |
| Dibromoacetic Acid | 10.6 µg/L No EPA limit set | 2/3 | SYR4 |
| Monochloroacetic Acid | 10 µg/L No EPA limit set | 1/3 | SYR4 |
| Tetrachloroethylene | 9.2 µg/L 184% of the EPA limit, in the worst sample — 5 µg/L | 2/3 | SYR4 |
| Lithium | 9.11 µg/L No EPA limit set | 1/3 | UCMR-5 |
| Trichloroacetic Acid | 6.4 µg/L No EPA limit set | 1/3 | SYR4 |
| Chromium | 3.9 µg/L 3.9% of the EPA limit 100 µg/L | 1/3 | SYR4 |
| Toluene | 1.7 µg/L 0.2% of the EPA limit 1000 µg/L | 1/3 | SYR4 |
| Trichloroethylene | 1.7 µg/L 34% of the EPA limit 5 µg/L | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.6 µg/L No EPA limit set | 2/3 | SYR4 |
| cis-1,2-Dichloroethylene | 1.1 µg/L 1.6% of the EPA limit 70 µg/L | 1/3 | SYR4 |
| 1,1-Dichloroethylene | 0.8800 µg/L 13% of the EPA limit 7 µg/L | 1/3 | SYR4 |
| Dichloromethane | 0.6500 µg/L 13% of the EPA limit 5 µg/L | 1/3 | SYR4 |
| 1,2-Dichloropropane | 0.6200 µg/L 12% of the EPA limit 5 µg/L | 1/3 | SYR4 |
| Carbon Tetrachloride | 0.2200 µg/L 4.4% of the EPA limit 5 µg/L | 1/3 | SYR4 |
| Benzene | 0.1500 µg/L 3% of the EPA limit 5 µg/L | 1/3 | SYR4 |
| PFBS | 0.0044 µg/L No EPA limit set | 1/3 | UCMR-5 |
| Pfhxa | 0.0040 µg/L No EPA limit set | 1/3 | UCMR-5 |
| PFHXS | 0.0040 µg/L No EPA limit set | 1/3 | UCMR-5 |
| Pfpea | 0.0034 µg/L No EPA limit set | 1/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 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 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 92407
| Supplier | State | Population served |
|---|---|---|
| SAN BERNARDINO CITY | CA | 214,665 |
| WEST VALLEY WATER DISTRICT | CA | 104,498 |
| MUSCOY MWC NO. 1 | CA | 13,000 |
Frequently asked questions about ZIP 92407 tap water
Is the tap water in ZIP 92407 safe to drink?
EPA testing detected 34 contaminants across the water suppliers serving ZIP 92407. 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 92407?
3 public water suppliers report EPA drinking-water monitoring for ZIP 92407. Each is listed above with its population served.
What contaminants are in ZIP 92407's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Copper, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.