What was found in ZIP 91901
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 | 7020 µg/L 70% of the EPA limit 10000 µg/L | 1/2 | SYR4 |
| Fluoride | 320 µg/L 8% of the EPA limit 4000 µg/L | 1/2 | SYR4 |
| TTHM | 68 µg/L 85% of the EPA limit 80 µg/L | 2/2 | SYR4 |
| Barium | 61 µg/L 3.1% of the EPA limit 2000 µg/L | 1/2 | SYR4 |
| Lithium | 47 µg/L No EPA limit set | 2/2 | UCMR-5 |
| Dibromochloromethane | 30 µg/L No EPA limit set | 1/2 | SYR4 |
| Combined Uranium | 23.393 µg/L 78% of the EPA limit 30 µg/L | 1/2 | SYR4 |
| Bromodichloromethane | 20 µg/L No EPA limit set | 1/2 | SYR4 |
| Chloroform | 20 µg/L No EPA limit set | 1/2 | SYR4 |
| Toluene | 18 µg/L 1.8% of the EPA limit 1000 µg/L | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 15 µg/L 25% of the EPA limit 60 µg/L | 2/2 | SYR4 |
| Bromoform | 14 µg/L No EPA limit set | 1/2 | SYR4 |
| Dichloroacetic Acid | 7.9 µg/L No EPA limit set | 1/2 | SYR4 |
| Monochloroacetic Acid | 7.4 µg/L No EPA limit set | 1/2 | SYR4 |
| Arsenic | 6 µg/L 60% of the EPA limit 10 µg/L | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 6 pCi/L 40% of the EPA limit 15 pCi/L | 1/2 | SYR4 |
| Dibromoacetic Acid | 5.1 µg/L No EPA limit set | 1/2 | SYR4 |
| Trichloroacetic Acid | 4.4 µg/L No EPA limit set | 1/2 | SYR4 |
| Monobromoacetic Acid | 4 µg/L No EPA limit set | 1/2 | SYR4 |
| Dichloromethane | 2.3 µg/L 46% of the EPA limit 5 µg/L | 1/2 | SYR4 |
| Selenium | 2.14 µg/L 4.3% of the EPA limit 50 µg/L | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.25 pCi/L 25% of the EPA limit 5 pCi/L | 1/2 | SYR4 |
| PFBS | 0.0243 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Pfba | 0.0058 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Lead | 0.0011 mg/L 7.3% of the EPA limit 0.0150 mg/L | 2/2 | 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 91901
| Supplier | State | Population served |
|---|---|---|
| PADRE DAM MWD | CA | 93,980 |
| Viejas Community System | CA | 9,600 |
Frequently asked questions about ZIP 91901 tap water
Is the tap water in ZIP 91901 safe to drink?
EPA testing detected 25 contaminants across the water suppliers serving ZIP 91901. 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 91901?
2 public water suppliers report EPA drinking-water monitoring for ZIP 91901. Each is listed above with its population served.
What contaminants are in ZIP 91901's water?
EPA monitoring detected Nitrate, Fluoride, TTHM, Barium, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.