What was found in Fort Washakie'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 |
|---|---|---|---|
| Copper | 166 µg/L 13% of the EPA limit 1300 µg/L Main supplier: FORT WASHAKIE · 2,620 people · 2019
Highest in the city: 676.7 µg/L — ETHETE WATER SYSTEM · 1,950 people · 2019 | 3/3 | SYR4 |
| Fluoride | 400 µg/L 10% of the EPA limit 4000 µg/L Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 2/3 | SYR4 |
| Nitrate-Nitrite | 356 µg/L 3.6% of the EPA limit 10000 µg/L Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 3/3 | SYR4 |
| Nitrate | 200 µg/L 2% of the EPA limit 10000 µg/L Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 1/3 | SYR4 |
| TTHM | 79.65 µg/L 100% of the EPA limit 80 µg/L Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 3/3 | SYR4 |
| Chloroform | 70.3 µg/L No EPA limit set Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 58.3 µg/L 97% of the EPA limit 60 µg/L Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 32 µg/L No EPA limit set Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 26 µg/L No EPA limit set Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 2/3 | SYR4 |
| Lithium | 21.5 µg/L No EPA limit set Main supplier: FORT WASHAKIE · 2,620 people · 2024 | 1/3 | UCMR-5 |
| Lead | 3.55 µg/L 24% of the EPA limit 15 µg/L Main supplier: FORT WASHAKIE · 2,620 people · 2019
Highest in the city: 12.8 µg/L — ETHETE WATER SYSTEM · 1,950 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 11.39 µg/L No EPA limit set Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 3.65 µg/L No EPA limit set Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.485 pCi/L 30% of the EPA limit 5 pCi/L Main supplier: FORT WASHAKIE · 2,620 people · 2019
Highest in the city: 2.015 pCi/L — ARAPAHOE INDUSTRIAL PARK · 650 people · 2018 | 3/3 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Highest in the city: ARAPAHOE INDUSTRIAL PARK · 650 people · 2018 | 1/3 | SYR4 |
| Selenium | 2 µg/L 4% of the EPA limit 50 µg/L Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 1/3 | SYR4 |
| Monochloroacetic Acid | 1.7 µg/L No EPA limit set Main supplier: FORT WASHAKIE · 2,620 people · 2019
Highest in the city: 1.75 µg/L — ETHETE WATER SYSTEM · 1,950 people · 2019 | 2/3 | SYR4 |
| Combined Uranium | 1.385 µg/L 4.6% of the EPA limit 30 µg/L Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.09 pCi/L 7.3% of the EPA limit 15 pCi/L Main supplier: FORT WASHAKIE · 2,620 people · 2019
Highest in the city: 1.3 pCi/L — ETHETE WATER SYSTEM · 1,950 people · 2018 | 2/3 | SYR4 |
| Bromoform | 0.5200 µg/L No EPA limit set Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 1/3 | SYR4 |
| Dibromoacetic Acid | 0.4750 µg/L No EPA limit set Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 2/3 | SYR4 |
| Hexachlorocyclopentadiene | 0.1900 µg/L 0.4% of the EPA limit 50 µg/L Main supplier: FORT WASHAKIE · 2,620 people · 2019 | 1/3 | SYR4 |
| PFOA | 0.0093 µg/L No EPA limit set Main supplier: FORT WASHAKIE · 2,620 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0040 mg/L 27% of the EPA limit 0.0150 mg/L Main supplier: FORT WASHAKIE · 2,620 people · 2025 | 3/3 | 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.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Fort Washakie
| Supplier | Population served |
|---|---|
| FORT WASHAKIE | 2,620 |
| ETHETE WATER SYSTEM | 1,950 |
| ARAPAHOE INDUSTRIAL PARK | 650 |
Frequently asked questions about Fort Washakie tap water
Is Fort Washakie tap water safe to drink?
EPA testing detected 24 contaminants in the water serving Fort Washakie. 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 Washakie?
3 public water suppliers report drinking-water monitoring for Fort Washakie, Wyoming to the EPA. Each is listed above with its population served.
What contaminants are in Fort Washakie's water?
The contaminants EPA monitoring detected in Fort Washakie include Copper, Fluoride, Nitrate-Nitrite, Nitrate, TTHM. 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.