What was found in ZIP 92324
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 | 359549.99999999773 µg/L 3595% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2018
Highest in the ZIP: 847999.9999999999 µg/L — COLTON, CITY OF · 46,525 people · 2019 | 4/4 | SYR4 |
| Nitrate | 10170 µg/L 102% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019 | 4/4 | SYR4 |
| Fluoride | 750 µg/L 19% of the EPA limit 4000 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019
Highest in the ZIP: 1275 µg/L — SAN BERNARDINO CITY · 214,665 people · 2019 | 4/4 | SYR4 |
| Copper | 135.75 µg/L 10% of the EPA limit 1300 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019
Highest in the ZIP: 406 µg/L — SAN BERNARDINO CITY · 214,665 people · 2019 | 3/4 | SYR4 |
| TTHM | 5.6 µg/L 7% of the EPA limit 80 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019
Highest in the ZIP: 65.17999999999999 µg/L — WEST VALLEY WATER DISTRICT · 104,498 people · 2019 | 4/4 | SYR4 |
| Barium | 65 µg/L 3.3% of the EPA limit 2000 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019 | 1/4 | SYR4 |
| Combined Uranium | 41.72 µg/L 139% of the EPA limit, at the 95th percentile of samples — 30 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019 | 4/4 | SYR4 |
| Lead | 8.355 µg/L 56% of the EPA limit 15 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019
Highest in the ZIP: 40 µg/L — SAN BERNARDINO CITY · 214,665 people · 2019 | 2/4 | SYR4 |
| Dibromochloromethane | 2.9 µg/L No EPA limit set Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019
Highest in the ZIP: 23.574999999999996 µg/L — WEST VALLEY WATER DISTRICT · 104,498 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 1.9700000000000002 µg/L No EPA limit set Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019
Highest in the ZIP: 19.389999999999997 µg/L — WEST VALLEY WATER DISTRICT · 104,498 people · 2019 | 4/4 | SYR4 |
| Chloroform | 9.731999999999998 µg/L No EPA limit set Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019
Highest in the ZIP: 18.025 µg/L — WEST VALLEY WATER DISTRICT · 104,498 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 16.039999999999978 µg/L 27% of the EPA limit 60 µg/L Highest in the ZIP: WEST VALLEY WATER DISTRICT · 104,498 people · 2019 | 3/4 | SYR4 |
| Bromoform | 2.9 µg/L No EPA limit set Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019
Highest in the ZIP: 14.479999999999995 µg/L — WEST VALLEY WATER DISTRICT · 104,498 people · 2019 | 4/4 | SYR4 |
| Gross Beta Particle Activity | 13 pCi/L No EPA limit set Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019 | 1/4 | SYR4 |
| Trichloroethylene | 11 µg/L 220% of the EPA limit, at the 95th percentile of samples — 5 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019 | 2/4 | SYR4 |
| Chromium | 10.549999999999997 µg/L 11% of the EPA limit 100 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019 | 2/4 | SYR4 |
| Arsenic | 8 µg/L 80% of the EPA limit 10 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019
Highest in the ZIP: 9.2 µg/L — WEST VALLEY WATER DISTRICT · 104,498 people · 2019 | 4/4 | SYR4 |
| Lithium | 9.1 µg/L No EPA limit set Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2023
Highest in the ZIP: 9.11 µg/L — SAN BERNARDINO CITY · 214,665 people · 2024 | 2/4 | UCMR-5 |
| Monochloroacetic Acid | 8.809999999999999 µg/L No EPA limit set Highest in the ZIP: SAN BERNARDINO CITY · 214,665 people · 2019 | 1/4 | SYR4 |
| Dibromoacetic Acid | 1.7 µg/L No EPA limit set Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019
Highest in the ZIP: 8.239999999999995 µg/L — WEST VALLEY WATER DISTRICT · 104,498 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 6.675 µg/L No EPA limit set Highest in the ZIP: WEST VALLEY WATER DISTRICT · 104,498 people · 2019 | 2/4 | SYR4 |
| Picloram | 4.949999999999999 µg/L 1% of the EPA limit 500 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019 | 1/4 | SYR4 |
| Trichloroacetic Acid | 4.814999999999999 µg/L No EPA limit set Highest in the ZIP: WEST VALLEY WATER DISTRICT · 104,498 people · 2019 | 1/4 | SYR4 |
| Tetrachloroethylene | 1.0915 µg/L 22% of the EPA limit 5 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019
Highest in the ZIP: 4.1 µg/L — SAN BERNARDINO CITY · 214,665 people · 2019 | 3/4 | SYR4 |
| Combined Radium (-226 And -228) | 4.004999999999999 pCi/L 80% of the EPA limit 5 pCi/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019 | 1/4 | SYR4 |
| 1,1-Dichloroethylene | 2.3 µg/L 33% of the EPA limit 7 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019 | 2/4 | SYR4 |
| Dichloromethane | 1.904999999999999 µg/L 38% of the EPA limit 5 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019 | 2/4 | 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 | 1/4 | SYR4 |
| Monobromoacetic Acid | 1.555 µg/L No EPA limit set Highest in the ZIP: SAN BERNARDINO CITY · 214,665 people · 2019 | 3/4 | SYR4 |
| cis-1,2-Dichloroethylene | 0.9435 µg/L 1.3% of the EPA limit 70 µg/L Highest in the ZIP: SAN BERNARDINO CITY · 214,665 people · 2019 | 2/4 | SYR4 |
| 1,2-Dichloropropane | 0.6170 µg/L 12% of the EPA limit 5 µg/L Highest in the ZIP: SAN BERNARDINO CITY · 214,665 people · 2019 | 1/4 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.2900 µg/L 145% of the EPA limit, at the 95th percentile of samples — 0.2000 µg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2019 | 1/4 | SYR4 |
| Carbon Tetrachloride | 0.2195 µg/L 4.4% of the EPA limit 5 µg/L Highest in the ZIP: SAN BERNARDINO CITY · 214,665 people · 2019 | 1/4 | SYR4 |
| Benzene | 0.1500 µg/L 3% of the EPA limit 5 µg/L Highest in the ZIP: SAN BERNARDINO CITY · 214,665 people · 2019 | 1/4 | SYR4 |
| PFOS | 0.0040 µg/L No EPA limit set Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2023
Highest in the ZIP: 0.0180 µg/L — COLTON, CITY OF · 46,525 people · 2025 | 2/4 | UCMR-5 |
| PFBS | 0.0100 µg/L No EPA limit set Highest in the ZIP: COLTON, CITY OF · 46,525 people · 2025 | 2/4 | UCMR-5 |
| Pfpea | 0.0067 µg/L No EPA limit set Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2023 | 3/4 | UCMR-5 |
| PFOA | 0.0059 µg/L No EPA limit set Highest in the ZIP: COLTON, CITY OF · 46,525 people · 2025 | 1/4 | UCMR-5 |
| PFHXS | 0.0051 µg/L No EPA limit set Highest in the ZIP: COLTON, CITY OF · 46,525 people · 2025 | 2/4 | UCMR-5 |
| Pfhxa | 0.0041 µg/L No EPA limit set Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2023 | 3/4 | UCMR-5 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: RIVERSIDE, CITY OF · 298,398 people · 2025 | 4/4 | 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 92324
| Supplier | State | Population served |
|---|---|---|
| RIVERSIDE, CITY OF | CA | 298,398 |
| SAN BERNARDINO CITY | CA | 214,665 |
| WEST VALLEY WATER DISTRICT | CA | 104,498 |
| COLTON, CITY OF | CA | 46,525 |
Frequently asked questions about ZIP 92324 tap water
Is the tap water in ZIP 92324 safe to drink?
EPA testing detected 41 contaminants across the water suppliers serving ZIP 92324. 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 92324?
4 public water suppliers report EPA drinking-water monitoring for ZIP 92324. Each is listed above with its population served.
What contaminants are in ZIP 92324'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.