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Tap water quality report

Crow Agency, MT

EPA monitoring detected 21 contaminants across the 3 water suppliers serving Crow Agency. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

3
water suppliers
2,744
people served
21
contaminants found
Montana rankings Lead in Montana PFAS in Montana

What was found in Crow Agency'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.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate-Nitrite
180 µg/L 1.8%
of the EPA limit 10000 µg/L
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2019
Highest in the city: 2873.5 µg/L — PRYOR WATER SYSTEM · 406 people · 2019
3/3 SYR4
Fluoride
190 µg/L 4.8%
of the EPA limit 4000 µg/L
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2018
Highest in the city: 300 µg/L — PRYOR WATER SYSTEM · 406 people · 2019
2/3 SYR4
Copper
64 µg/L 4.9%
of the EPA limit 1300 µg/L
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2018
Highest in the city: 275 µg/L — PRYOR WATER SYSTEM · 406 people · 2017
3/3 SYR4
TTHM
90 µg/L 113%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2019
2/3 SYR4
Barium
80 µg/L 4%
of the EPA limit 2000 µg/L
Highest in the city: WYOLA WATER SYSTEM · 281 people · 2019
1/3 SYR4
Chloroform
63.3 µg/L
No EPA limit set
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2019
2/3 SYR4
Total Haloacetic Acids (HAA5)
56.4 µg/L 94%
of the EPA limit 60 µg/L
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2019
2/3 SYR4
Trichloroacetic Acid
33.6 µg/L
No EPA limit set
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2019
2/3 SYR4
Dichloroacetic Acid
27.8 µg/L
No EPA limit set
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2019
2/3 SYR4
Bromodichloromethane
16.8 µg/L
No EPA limit set
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2019
2/3 SYR4
Monobromoacetic Acid
8.24 µg/L
No EPA limit set
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2019
2/3 SYR4
Gross Alpha, Excl. Radon And U
4.9 pCi/L 33%
of the EPA limit 15 pCi/L
Highest in the city: WYOLA WATER SYSTEM · 281 people · 2016
2/3 SYR4
Dibromochloromethane
3.95 µg/L
No EPA limit set
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2019
2/3 SYR4
Monochloroacetic Acid
3.5 µg/L
No EPA limit set
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2019
2/3 SYR4
Lead
2.85 µg/L 19%
of the EPA limit 15 µg/L
Highest in the city: PRYOR WATER SYSTEM · 406 people · 2017
2/3 SYR4
Combined Radium (-226 And -228)
1.4 pCi/L 28%
of the EPA limit 5 pCi/L
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2016
Highest in the city: 2.07 pCi/L — PRYOR WATER SYSTEM · 406 people · 2019
3/3 SYR4
Combined Uranium
2.02 µg/L 6.7%
of the EPA limit 30 µg/L
Highest in the city: PRYOR WATER SYSTEM · 406 people · 2019
2/3 SYR4
Dibromoacetic Acid
1.2515 µg/L
No EPA limit set
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2019
2/3 SYR4
Bromoform
1 µg/L
No EPA limit set
Highest in the city: PRYOR WATER SYSTEM · 406 people · 2019
1/3 SYR4
Selenium
1 µg/L 2%
of the EPA limit 50 µg/L
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2013
2/3 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: CROW AGENCY WATER SYSTEM · 2,057 people · 2024
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 Crow Agency

SupplierPopulation served
CROW AGENCY WATER SYSTEM 2,057
PRYOR WATER SYSTEM 406
WYOLA WATER SYSTEM 281

Frequently asked questions about Crow Agency tap water

Is Crow Agency tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Crow Agency. 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 Crow Agency?

3 public water suppliers report drinking-water monitoring for Crow Agency, Montana to the EPA. Each is listed above with its population served.

What contaminants are in Crow Agency's water?

The contaminants EPA monitoring detected in Crow Agency include Nitrate-Nitrite, Fluoride, Copper, TTHM, Barium. 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.