Tap WaterIndex

← North Dakota

Tap water quality report

Fort Yates, ND

EPA monitoring detected 15 contaminants across the 1 water supplier serving Fort Yates. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
6,839
people served
15
contaminants found
North Dakota rankings Lead in North Dakota PFAS in North Dakota

What was found in Fort Yates's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
350 µg/L 8.8%
of the EPA limit 4000 µg/L
 1/1 SYR4
Nitrate-Nitrite
180 µg/L 1.8%
of the EPA limit 10000 µg/L
 1/1 SYR4
TTHM
113.5 µg/L 142%
of the EPA limit, in the worst sample — 80 µg/L
 1/1 SYR4
Copper
81.6 µg/L 6.3%
of the EPA limit 1300 µg/L
 1/1 SYR4
Lithium
60 µg/L
No EPA limit set
 1/1 UCMR-5
Total Haloacetic Acids (HAA5)
38.47 µg/L 64%
of the EPA limit 60 µg/L
 1/1 SYR4
Cyanide
15 µg/L 7.5%
of the EPA limit 200 µg/L
 1/1 SYR4
Chloroform
14.8 µg/L
No EPA limit set
 1/1 SYR4
Barium
12.2 µg/L 0.6%
of the EPA limit 2000 µg/L
 1/1 SYR4
Bromodichloromethane
5.04 µg/L
No EPA limit set
 1/1 SYR4
Lead
2.13 µg/L 14%
of the EPA limit 15 µg/L
 1/1 SYR4
Combined Radium (-226 And -228)
2.1 pCi/L 42%
of the EPA limit 5 pCi/L
 1/1 SYR4
Dibromochloromethane
1.27 µg/L
No EPA limit set
 1/1 SYR4
Selenium
1 µg/L 2%
of the EPA limit 50 µg/L
 1/1 SYR4
Lead
0.0063 mg/L 42%
of the EPA limit 0.0150 mg/L
 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 single worst sample on record — 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 Yates

SupplierPopulation 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, TTHM, Copper, Lithium. The full list, with the highest level found 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.