What was found in ZIP 91762
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 | 9840 µg/L 98% of the EPA limit 10000 µg/L Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2017
Highest in the ZIP: 17000 µg/L — MONTE VISTA WD · 56,017 people · 2019 | 3/3 | SYR4 |
| Nitrate | 12000 µg/L 120% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019
Highest in the ZIP: 16000 µg/L — MONTE VISTA WD · 56,017 people · 2019 | 2/3 | SYR4 |
| Nitrite | 4525 µg/L 453% of the EPA limit, at the 95th percentile of samples — 1000 µg/L Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019 | 1/3 | SYR4 |
| Fluoride | 400 µg/L 10% of the EPA limit 4000 µg/L Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019 | 2/3 | SYR4 |
| Copper | 288.5 µg/L 22% of the EPA limit 1300 µg/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2018 | 2/3 | SYR4 |
| Barium | 139.5 µg/L 7% of the EPA limit 2000 µg/L Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019 | 2/3 | SYR4 |
| TTHM | 71.5 µg/L 89% of the EPA limit 80 µg/L Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019
Highest in the ZIP: 122.275 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Chloroform | 15 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019
Highest in the ZIP: 94.645 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 31.5 µg/L 53% of the EPA limit 60 µg/L Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019
Highest in the ZIP: 62.71 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 4.205 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019
Highest in the ZIP: 36.03 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 5.405 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019
Highest in the ZIP: 30.355 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Bromoform | 27.5 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 25 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019
Highest in the ZIP: 27.175 µg/L — MONTE VISTA WD · 56,017 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 27 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 20.15 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019
Highest in the ZIP: 24.055 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Lead | 18.392 µg/L 123% of the EPA limit, at the 95th percentile of samples — 15 µg/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2018 | 2/3 | SYR4 |
| Chromium | 7.45 µg/L 7.5% of the EPA limit 100 µg/L Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019
Highest in the ZIP: 12 µg/L — MONTE VISTA WD · 56,017 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 10.805 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 7.16 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019 | 3/3 | SYR4 |
| Arsenic | 2.39 µg/L 24% of the EPA limit 10 µg/L Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019
Highest in the ZIP: 5.825 µg/L — MONTE VISTA WD · 56,017 people · 2019 | 2/3 | SYR4 |
| Gross Beta Particle Activity | 2.054 pCi/L No EPA limit set Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.095 pCi/L 22% of the EPA limit 5 pCi/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| 2,4-D | 0.9000 µg/L 1.3% of the EPA limit 70 µg/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/3 | SYR4 |
| Tetrachloroethylene | 0.6400 µg/L 13% of the EPA limit 5 µg/L Highest in the ZIP: MONTE VISTA WD · 56,017 people · 2019 | 1/3 | SYR4 |
| Trichloroethylene | 0.5800 µg/L 12% of the EPA limit 5 µg/L Highest in the ZIP: MONTE VISTA WD · 56,017 people · 2019 | 1/3 | SYR4 |
| 1,1-Dichloroethylene | 0.5200 µg/L 7.4% of the EPA limit 7 µg/L Highest in the ZIP: MONTE VISTA WD · 56,017 people · 2019 | 1/3 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.1200 µg/L 60% of the EPA limit 0.2000 µg/L Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019
Highest in the ZIP: 0.2185 µg/L — MONTE VISTA WD · 56,017 people · 2019 | 2/3 | SYR4 |
| PFOA | 0.0300 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2024 | 1/3 | UCMR-5 |
| Ethylene Dibromide | 0.0210 µg/L 42% of the EPA limit 0.0500 µg/L Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0064 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2024
Highest in the ZIP: 0.0110 µg/L — MONTE VISTA WD · 56,017 people · 2025 | 2/3 | UCMR-5 |
| PFHXS | 0.0042 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2024
Highest in the ZIP: 0.0074 µg/L — MONTE VISTA WD · 56,017 people · 2025 | 2/3 | UCMR-5 |
| Pfhxa | 0.0071 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2024 | 2/3 | UCMR-5 |
| Pfpea | 0.0067 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2024 | 2/3 | UCMR-5 |
| PFOS | 0.0052 µg/L No EPA limit set Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 people · 2024
Highest in the ZIP: 0.0056 µg/L — MONTE VISTA WD · 56,017 people · 2025 | 2/3 | UCMR-5 |
| Lead | 0.00060 mg/L 4% of the EPA limit 0.0150 mg/L Main supplier: ONTARIO MUNICIPAL UTILITIES COMPANY · 185,010 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 91762
| Supplier | State | Population served |
|---|---|---|
| ONTARIO MUNICIPAL UTILITIES COMPANY | CA | 185,010 |
| MONTE VISTA WD | CA | 56,017 |
| BRYAN CO. RWS & SWMD #2 | OK | 6,270 |
Frequently asked questions about ZIP 91762 tap water
Is the tap water in ZIP 91762 safe to drink?
EPA testing detected 35 contaminants across the water suppliers serving ZIP 91762. 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 91762?
3 public water suppliers report EPA drinking-water monitoring for ZIP 91762. Each is listed above with its population served.
What contaminants are in ZIP 91762's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Nitrite, Fluoride, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.