What was found in ZIP 92336
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 | 874000 µg/L 8740% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019 | 3/3 | SYR4 |
| Nitrate | 7800 µg/L 78% of the EPA limit 10000 µg/L Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019
Highest in the ZIP: 15000 µg/L — CUCAMONGA VALLEY WATER DISTRICT · 211,069 people · 2019 | 3/3 | SYR4 |
| Fluoride | 480 µg/L 12% of the EPA limit 4000 µg/L Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019
Highest in the ZIP: 587 µg/L — CUCAMONGA VALLEY WATER DISTRICT · 211,069 people · 2019 | 3/3 | SYR4 |
| Copper | 216.5 µg/L 17% of the EPA limit 1300 µg/L Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019 | 3/3 | SYR4 |
| Barium | 116.5 µg/L 5.8% of the EPA limit 2000 µg/L Highest in the ZIP: CUCAMONGA VALLEY WATER DISTRICT · 211,069 people · 2019 | 1/3 | SYR4 |
| TTHM | 61.3 µg/L 77% of the EPA limit 80 µg/L Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019
Highest in the ZIP: 97.3 µg/L — CUCAMONGA VALLEY WATER DISTRICT · 211,069 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 25 µg/L No EPA limit set Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019
Highest in the ZIP: 41.15 µg/L — CUCAMONGA VALLEY WATER DISTRICT · 211,069 people · 2019 | 3/3 | SYR4 |
| Bromoform | 14.8 µg/L No EPA limit set Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019
Highest in the ZIP: 37.93 µg/L — CUCAMONGA VALLEY WATER DISTRICT · 211,069 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 18 µg/L No EPA limit set Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019
Highest in the ZIP: 25 µg/L — CUCAMONGA VALLEY WATER DISTRICT · 211,069 people · 2019 | 3/3 | SYR4 |
| Chloroform | 24 µg/L No EPA limit set Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 21 µg/L 35% of the EPA limit 60 µg/L Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019 | 3/3 | SYR4 |
| Lead | 19 µg/L 127% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019 | 1/3 | SYR4 |
| Combined Uranium | 5.215 µg/L 17% of the EPA limit 30 µg/L Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019
Highest in the ZIP: 13.4398 µg/L — CUCAMONGA VALLEY WATER DISTRICT · 211,069 people · 2017 | 3/3 | SYR4 |
| Trichloroacetic Acid | 11.05 µg/L No EPA limit set Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 6.8 µg/L No EPA limit set Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019
Highest in the ZIP: 11 µg/L — CUCAMONGA VALLEY WATER DISTRICT · 211,069 people · 2019 | 3/3 | SYR4 |
| Dichloromethane | 10.92 µg/L 218% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 9.7 µg/L No EPA limit set Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019 | 3/3 | SYR4 |
| Arsenic | 6.01 µg/L 60% of the EPA limit 10 µg/L Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019
Highest in the ZIP: 9.2 µg/L — WEST VALLEY WATER DISTRICT · 104,498 people · 2019 | 3/3 | SYR4 |
| Tetrachloroethylene | 4.9 µg/L 98% of the EPA limit 5 µg/L Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019 | 2/3 | SYR4 |
| Monobromoacetic Acid | 1.1 µg/L No EPA limit set Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019
Highest in the ZIP: 1.8 µg/L — CUCAMONGA VALLEY WATER DISTRICT · 211,069 people · 2019 | 3/3 | SYR4 |
| Toluene | 1.7 µg/L 0.2% of the EPA limit 1000 µg/L Highest in the ZIP: WEST VALLEY WATER DISTRICT · 104,498 people · 2019 | 1/3 | SYR4 |
| Picloram | 1.4 µg/L 0.3% of the EPA limit 500 µg/L Highest in the ZIP: CUCAMONGA VALLEY WATER DISTRICT · 211,069 people · 2019 | 1/3 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.0129 µg/L 6.4% of the EPA limit 0.2000 µg/L Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2019
Highest in the ZIP: 0.2900 µg/L — CUCAMONGA VALLEY WATER DISTRICT · 211,069 people · 2019 | 2/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: SAN GABRIEL VALLEY WC - FONTANA · 237,700 people · 2024 | 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 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 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, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.