What was found in ZIP 92336
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 | 1000000 µg/L 10000% of the EPA limit, in the worst sample — 10000 µg/L | 3/3 | SYR4 |
| Nitrate | 18758 µg/L 188% of the EPA limit, in the worst sample — 10000 µg/L | 3/3 | SYR4 |
| Fluoride | 810 µg/L 20% of the EPA limit 4000 µg/L | 3/3 | SYR4 |
| Copper | 220 µg/L 17% of the EPA limit 1300 µg/L | 3/3 | SYR4 |
| TTHM | 160 µg/L 200% of the EPA limit, in the worst sample — 80 µg/L | 3/3 | SYR4 |
| Barium | 120 µg/L 6% of the EPA limit 2000 µg/L | 1/3 | SYR4 |
| Dibromochloromethane | 60 µg/L No EPA limit set | 3/3 | SYR4 |
| Bromodichloromethane | 50 µg/L No EPA limit set | 3/3 | SYR4 |
| Bromoform | 46 µg/L No EPA limit set | 3/3 | SYR4 |
| Chloroform | 37 µg/L No EPA limit set | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 30 µg/L 50% of the EPA limit 60 µg/L | 3/3 | SYR4 |
| Arsenic | 19 µg/L 190% of the EPA limit, in the worst sample — 10 µg/L | 3/3 | SYR4 |
| Lead | 19 µg/L 127% of the EPA limit, in the worst sample — 15 µg/L | 1/3 | SYR4 |
| Combined Uranium | 17.88 µg/L 60% of the EPA limit 30 µg/L | 3/3 | SYR4 |
| Dichloromethane | 15 µg/L 300% of the EPA limit, in the worst sample — 5 µg/L | 2/3 | SYR4 |
| Dibromoacetic Acid | 14.3 µg/L No EPA limit set | 3/3 | SYR4 |
| Dichloroacetic Acid | 14 µg/L No EPA limit set | 3/3 | SYR4 |
| Trichloroacetic Acid | 14 µg/L No EPA limit set | 3/3 | SYR4 |
| Tetrachloroethylene | 7.6 µg/L 152% of the EPA limit, in the worst sample — 5 µg/L | 2/3 | SYR4 |
| Monobromoacetic Acid | 2.2 µg/L No EPA limit set | 3/3 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 1.8 µg/L 900% of the EPA limit, in the worst sample — 0.2000 µg/L | 2/3 | SYR4 |
| Toluene | 1.7 µg/L 0.2% of the EPA limit 1000 µg/L | 1/3 | SYR4 |
| Picloram | 1.4 µg/L 0.3% of the EPA limit 500 µg/L | 1/3 | SYR4 |
| 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 92336
| Supplier | State | Population served |
|---|---|---|
| SAN GABRIEL VALLEY WC - FONTANA | CA | 237,700 |
| CUCAMONGA VALLEY WATER DISTRICT | CA | 211,069 |
| WEST VALLEY WATER DISTRICT | CA | 104,498 |
Frequently asked questions about ZIP 92336 tap water
Is the tap water in ZIP 92336 safe to drink?
EPA testing detected 24 contaminants across the water suppliers serving ZIP 92336. 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 92336?
3 public water suppliers report EPA drinking-water monitoring for ZIP 92336. Each is listed above with its population served.
What contaminants are in ZIP 92336'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.