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Tap water quality report

Culbertson, MT

EPA monitoring detected 13 contaminants across the 2 water suppliers serving Culbertson. 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.

2
water suppliers
3,719
people served
13
contaminants found
Montana rankings Lead in Montana PFAS in Montana

What was found in Culbertson'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
Copper
1263 µg/L 97%
of the EPA limit 1300 µg/L
Main supplier: DRY PRAIRIE RURAL WATER AUTHORITY · 3,005 people · 2018
2/2 SYR4
TTHM
140.75 µg/L 176%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: DRY PRAIRIE RURAL WATER AUTHORITY · 3,005 people · 2019
2/2 SYR4
Chloroform
110.3 µg/L
No EPA limit set
Main supplier: DRY PRAIRIE RURAL WATER AUTHORITY · 3,005 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
106.4 µg/L 177%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
Main supplier: DRY PRAIRIE RURAL WATER AUTHORITY · 3,005 people · 2019
2/2 SYR4
Trichloroacetic Acid
48 µg/L
No EPA limit set
Main supplier: DRY PRAIRIE RURAL WATER AUTHORITY · 3,005 people · 2019
2/2 SYR4
Dichloroacetic Acid
45.6 µg/L
No EPA limit set
Main supplier: DRY PRAIRIE RURAL WATER AUTHORITY · 3,005 people · 2019
2/2 SYR4
Lead
34.3 µg/L 229%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: DRY PRAIRIE RURAL WATER AUTHORITY · 3,005 people · 2018
2/2 SYR4
Bromodichloromethane
26.15 µg/L
No EPA limit set
Main supplier: DRY PRAIRIE RURAL WATER AUTHORITY · 3,005 people · 2019
2/2 SYR4
Dibromochloromethane
6.44 µg/L
No EPA limit set
Main supplier: DRY PRAIRIE RURAL WATER AUTHORITY · 3,005 people · 2019
Highest in the city: 6.76 µg/L — CULBERTSON TOWN OF · 714 people · 2019
2/2 SYR4
Monochloroacetic Acid
4.3 µg/L
No EPA limit set
Main supplier: DRY PRAIRIE RURAL WATER AUTHORITY · 3,005 people · 2019
2/2 SYR4
Dibromoacetic Acid
1.71 µg/L
No EPA limit set
Main supplier: DRY PRAIRIE RURAL WATER AUTHORITY · 3,005 people · 2019
2/2 SYR4
Monobromoacetic Acid
1.175 µg/L
No EPA limit set
Main supplier: DRY PRAIRIE RURAL WATER AUTHORITY · 3,005 people · 2019
2/2 SYR4
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
Main supplier: DRY PRAIRIE RURAL WATER AUTHORITY · 3,005 people · 2021
2/2 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 Culbertson

SupplierPopulation served
DRY PRAIRIE RURAL WATER AUTHORITY 3,005
CULBERTSON TOWN OF 714

Frequently asked questions about Culbertson tap water

Is Culbertson tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Culbertson. 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 Culbertson?

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

What contaminants are in Culbertson's water?

The contaminants EPA monitoring detected in Culbertson include Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5), Trichloroacetic Acid. 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.