What was found in ZIP 92311
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 | 11000 µg/L 110% of the EPA limit, in the worst sample — 10000 µg/L | 2/2 | SYR4 |
| Nitrate-Nitrite | 9500 µg/L 95% of the EPA limit 10000 µg/L | 2/2 | SYR4 |
| Fluoride | 1500 µg/L 38% of the EPA limit 4000 µg/L | 2/2 | SYR4 |
| Barium | 140 µg/L 7% of the EPA limit 2000 µg/L | 1/2 | SYR4 |
| Lithium | 79 µg/L No EPA limit set | 2/2 | UCMR-5 |
| Combined Uranium | 25.33 µg/L 84% of the EPA limit 30 µg/L | 2/2 | SYR4 |
| Arsenic | 25 µg/L 250% of the EPA limit, in the worst sample — 10 µg/L | 2/2 | SYR4 |
| TTHM | 14 µg/L 18% of the EPA limit 80 µg/L | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 8.9 µg/L 15% of the EPA limit 60 µg/L | 1/2 | SYR4 |
| Bromoform | 8 µg/L No EPA limit set | 1/2 | SYR4 |
| Monochloroacetic Acid | 5.9 µg/L No EPA limit set | 1/2 | SYR4 |
| Dibromochloromethane | 4.9 µg/L No EPA limit set | 1/2 | SYR4 |
| Bromodichloromethane | 2.7 µg/L No EPA limit set | 1/2 | SYR4 |
| Dibromoacetic Acid | 2.6 µg/L No EPA limit set | 1/2 | SYR4 |
| Trichloroacetic Acid | 1.8 µg/L No EPA limit set | 1/2 | SYR4 |
| Monobromoacetic Acid | 1.5 µg/L No EPA limit set | 1/2 | SYR4 |
| Chloroform | 1.2 µg/L No EPA limit set | 1/2 | SYR4 |
| Dichloroacetic Acid | 1 µg/L No EPA limit set | 1/2 | SYR4 |
| PFOA | 0.0057 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Pfhxa | 0.0054 µg/L No EPA limit set | 1/2 | UCMR-5 |
| PFHXS | 0.0050 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Pfpea | 0.0049 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Lead | 0.0016 mg/L 11% 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 92311
| Supplier | State | Population served |
|---|---|---|
| GOLDEN STATE WATER CO - BARSTOW | CA | 32,547 |
| BAR-LEN MWC | CA | 126 |
Frequently asked questions about ZIP 92311 tap water
Is the tap water in ZIP 92311 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 92311. 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 92311?
2 public water suppliers report EPA drinking-water monitoring for ZIP 92311. Each is listed above with its population served.
What contaminants are in ZIP 92311's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Barium, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.