What was found in Fort Irwin's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every 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 |
Water suppliers serving Fort Irwin
| Supplier | Population served |
|---|---|
| US ARMY FORT IRWIN | 15,701 |
Frequently asked questions about Fort Irwin tap water
Is Fort Irwin tap water safe to drink?
EPA testing detected 18 contaminants in the water serving Fort Irwin. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Fort Irwin?
1 public water supplier report drinking-water monitoring for Fort Irwin, California to the EPA. Each is listed above with its population served.
What contaminants are in Fort Irwin's water?
The contaminants EPA monitoring detected in Fort Irwin include Fluoride, Nitrate, Barium, TTHM, Arsenic. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.