What was found in ZIP 92310
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 |
|---|---|---|---|
| Fluoride | 9000 µg/L 225% of the EPA limit, at the 95th percentile of samples — 4000 µg/L Main supplier: US ARMY FORT IRWIN · 15,701 people · 2019 | 1/1 | SYR4 |
| Nitrate | 4800 µg/L 48% of the EPA limit 10000 µg/L Main supplier: US ARMY FORT IRWIN · 15,701 people · 2019 | 1/1 | SYR4 |
| Barium | 47.6 µg/L 2.4% of the EPA limit 2000 µg/L Main supplier: US ARMY FORT IRWIN · 15,701 people · 2018 | 1/1 | SYR4 |
| TTHM | 33.8 µg/L 42% of the EPA limit 80 µg/L Main supplier: US ARMY FORT IRWIN · 15,701 people · 2019 | 1/1 | SYR4 |
| Arsenic | 32 µg/L 320% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: US ARMY FORT IRWIN · 15,701 people · 2019 | 1/1 | SYR4 |
| Bromoform | 17.4 µg/L No EPA limit set Main supplier: US ARMY FORT IRWIN · 15,701 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 13.8622 µg/L 46% of the EPA limit 30 µg/L Main supplier: US ARMY FORT IRWIN · 15,701 people · 2018 | 1/1 | SYR4 |
| Dibromochloromethane | 11 µg/L No EPA limit set Main supplier: US ARMY FORT IRWIN · 15,701 people · 2019 | 1/1 | SYR4 |
| Lithium | 11 µg/L No EPA limit set Main supplier: US ARMY FORT IRWIN · 15,701 people · 2025 | 1/1 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 7.96 µg/L 13% of the EPA limit 60 µg/L Main supplier: US ARMY FORT IRWIN · 15,701 people · 2019 | 1/1 | SYR4 |
| Chromium | 7.6 µg/L 7.6% of the EPA limit 100 µg/L Main supplier: US ARMY FORT IRWIN · 15,701 people · 2018 | 1/1 | SYR4 |
| Monochloroacetic Acid | 7.5 µg/L No EPA limit set Main supplier: US ARMY FORT IRWIN · 15,701 people · 2019 | 1/1 | SYR4 |
| Chloroform | 4.09 µg/L No EPA limit set Main supplier: US ARMY FORT IRWIN · 15,701 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 3.76 µg/L No EPA limit set Main supplier: US ARMY FORT IRWIN · 15,701 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 3 µg/L No EPA limit set Main supplier: US ARMY FORT IRWIN · 15,701 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 2.46 µg/L No EPA limit set Main supplier: US ARMY FORT IRWIN · 15,701 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 2.08 µg/L No EPA limit set Main supplier: US ARMY FORT IRWIN · 15,701 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: US ARMY FORT IRWIN · 15,701 people · 2024 | 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 92310
| Supplier | State | Population served |
|---|---|---|
| US ARMY FORT IRWIN | CA | 15,701 |
Frequently asked questions about ZIP 92310 tap water
Is the tap water in ZIP 92310 safe to drink?
EPA testing detected 18 contaminants across the water suppliers serving ZIP 92310. 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 92310?
1 public water supplier report EPA drinking-water monitoring for ZIP 92310. Each is listed above with its population served.
What contaminants are in ZIP 92310's water?
EPA monitoring detected Fluoride, Nitrate, Barium, TTHM, Arsenic, and others across this ZIP's suppliers. The full list with levels and sources is above.