What was found in Fort Yates'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 | 350 µg/L 8.8% of the EPA limit 4000 µg/L Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2013 | 1/1 | SYR4 |
| Nitrate-Nitrite | 180 µg/L 1.8% of the EPA limit 10000 µg/L Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2019 | 1/1 | SYR4 |
| Copper | 76.685 µg/L 5.9% of the EPA limit 1300 µg/L Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2019 | 1/1 | SYR4 |
| TTHM | 60.179 µg/L 75% of the EPA limit 80 µg/L Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2019 | 1/1 | SYR4 |
| Lithium | 60 µg/L No EPA limit set Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2024 | 1/1 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 28.7775 µg/L 48% of the EPA limit 60 µg/L Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2019 | 1/1 | SYR4 |
| Cyanide | 14.8 µg/L 7.4% of the EPA limit 200 µg/L Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2019 | 1/1 | SYR4 |
| Chloroform | 14.8 µg/L No EPA limit set Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2017 | 1/1 | SYR4 |
| Barium | 12.2 µg/L 0.6% of the EPA limit 2000 µg/L Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2013 | 1/1 | SYR4 |
| Bromodichloromethane | 5.04 µg/L No EPA limit set Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2017 | 1/1 | SYR4 |
| Lead | 2.1225 µg/L 14% of the EPA limit 15 µg/L Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 2.0249 pCi/L 40% of the EPA limit 5 pCi/L Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 1.27 µg/L No EPA limit set Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2017 | 1/1 | SYR4 |
| Selenium | 1 µg/L 2% of the EPA limit 50 µg/L Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2013 | 1/1 | SYR4 |
| Lead | 0.0063 mg/L 42% of the EPA limit 0.0150 mg/L Main supplier: STANDING ROCK RURAL WATER SYSTEM · 6,839 people · 2025 | 1/1 | LCR |
Water suppliers serving Fort Yates
| Supplier | Population served |
|---|---|
| STANDING ROCK RURAL WATER SYSTEM | 6,839 |
Frequently asked questions about Fort Yates tap water
Is Fort Yates tap water safe to drink?
EPA testing detected 15 contaminants in the water serving Fort Yates. 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 Yates?
1 public water supplier report drinking-water monitoring for Fort Yates, North Dakota to the EPA. Each is listed above with its population served.
What contaminants are in Fort Yates's water?
The contaminants EPA monitoring detected in Fort Yates include Fluoride, Nitrate-Nitrite, Copper, TTHM, Lithium. 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.