What was found in ZIP 91003
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 | 878000 µg/L 8780% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| Nitrate | 4900 µg/L 49% of the EPA limit 10000 µg/L Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| Fluoride | 2500 µg/L 63% of the EPA limit 4000 µg/L Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| Copper | 73 µg/L 5.6% of the EPA limit 1300 µg/L Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 31.8115 µg/L 106% of the EPA limit, at the 95th percentile of samples — 30 µg/L Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| TTHM | 16.705 µg/L 21% of the EPA limit 80 µg/L Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 6.6 µg/L No EPA limit set Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 4.42 µg/L No EPA limit set Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| Bromoform | 3.71 µg/L No EPA limit set Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| Tetrachloroethylene | 3.7 µg/L 74% of the EPA limit 5 µg/L Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 3.63 µg/L 6.1% of the EPA limit 60 µg/L Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| Chloroform | 2.775 µg/L No EPA limit set Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| Arsenic | 2.68 µg/L 27% of the EPA limit 10 µg/L Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 1.99 µg/L No EPA limit set Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 1.915 µg/L No EPA limit set Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 1.795 µg/L No EPA limit set Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2019 | 1/1 | SYR4 |
| PFOS | 0.0190 µg/L No EPA limit set Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2023 | 1/1 | UCMR-5 |
| PFHXS | 0.0110 µg/L No EPA limit set Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2023 | 1/1 | UCMR-5 |
| PFOA | 0.0085 µg/L No EPA limit set Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2023 | 1/1 | UCMR-5 |
| Pfba | 0.0057 µg/L No EPA limit set Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2023 | 1/1 | UCMR-5 |
| PFBS | 0.0035 µg/L No EPA limit set Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2023 | 1/1 | UCMR-5 |
| Pfpea | 0.0035 µg/L No EPA limit set Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2023 | 1/1 | UCMR-5 |
| Pfhxa | 0.0031 µg/L No EPA limit set Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2023 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: RUBIO CANON LAND & WATER ASSOCIATION · 9,215 people · 2025 | 1/1 | 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 91003
| Supplier | State | Population served |
|---|---|---|
| RUBIO CANON LAND & WATER ASSOCIATION | CA | 9,215 |
Frequently asked questions about ZIP 91003 tap water
Is the tap water in ZIP 91003 safe to drink?
EPA testing detected 24 contaminants across the water suppliers serving ZIP 91003. 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 91003?
1 public water supplier report EPA drinking-water monitoring for ZIP 91003. Each is listed above with its population served.
What contaminants are in ZIP 91003's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Copper, Combined Uranium, and others across this ZIP's suppliers. The full list with levels and sources is above.