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Tap water quality report

Sweetgrass, MT

EPA monitoring detected 16 contaminants across the 2 water suppliers serving Sweetgrass. 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
200
people served
16
contaminants found
Montana rankings Lead in Montana PFAS in Montana

What was found in Sweetgrass'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
5899 µg/L 59%
of the EPA limit 10000 µg/L
Highest in the city: HILLSIDE COLONY INC · 100 people · 2019
1/2 SYR4
Copper
1465 µg/L 113%
of the EPA limit, at the 95th percentile of samples — 1300 µg/L
Main supplier: SWEETGRASS WATER USERS ASSN · 100 people · 2018
2/2 SYR4
TTHM
97.8 µg/L 122%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: SWEETGRASS WATER USERS ASSN · 100 people · 2019
1/2 SYR4
Chloroform
89.8 µg/L
No EPA limit set
Main supplier: SWEETGRASS WATER USERS ASSN · 100 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
40.82 µg/L 68%
of the EPA limit 60 µg/L
Main supplier: SWEETGRASS WATER USERS ASSN · 100 people · 2019
1/2 SYR4
Lead
23.5 µg/L 157%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: SWEETGRASS WATER USERS ASSN · 100 people · 2018
1/2 SYR4
Dichloroacetic Acid
20.9 µg/L
No EPA limit set
Main supplier: SWEETGRASS WATER USERS ASSN · 100 people · 2019
1/2 SYR4
Trichloroacetic Acid
18.88 µg/L
No EPA limit set
Main supplier: SWEETGRASS WATER USERS ASSN · 100 people · 2019
1/2 SYR4
Bromodichloromethane
12.2 µg/L
No EPA limit set
Main supplier: SWEETGRASS WATER USERS ASSN · 100 people · 2019
1/2 SYR4
Monochloroacetic Acid
2.315 µg/L
No EPA limit set
Main supplier: SWEETGRASS WATER USERS ASSN · 100 people · 2019
1/2 SYR4
Dibromochloromethane
2.19 µg/L
No EPA limit set
Main supplier: SWEETGRASS WATER USERS ASSN · 100 people · 2019
1/2 SYR4
Bromoform
0.9370 µg/L
No EPA limit set
Main supplier: SWEETGRASS WATER USERS ASSN · 100 people · 2019
1/2 SYR4
Toluene
0.6900 µg/L 0.1%
of the EPA limit 1000 µg/L
Highest in the city: HILLSIDE COLONY INC · 100 people · 2019
1/2 SYR4
Dibromoacetic Acid
0.6825 µg/L
No EPA limit set
Main supplier: SWEETGRASS WATER USERS ASSN · 100 people · 2019
1/2 SYR4
Monobromoacetic Acid
0.1500 µg/L
No EPA limit set
Main supplier: SWEETGRASS WATER USERS ASSN · 100 people · 2019
1/2 SYR4
Lead
0.0150 mg/L 100%
of the EPA limit 0.0150 mg/L
Main supplier: SWEETGRASS WATER USERS ASSN · 100 people · 2018
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 Sweetgrass

SupplierPopulation served
SWEETGRASS WATER USERS ASSN 100
HILLSIDE COLONY INC 100

Frequently asked questions about Sweetgrass tap water

Is Sweetgrass tap water safe to drink?

EPA testing detected 16 contaminants in the water serving Sweetgrass. 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 Sweetgrass?

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

What contaminants are in Sweetgrass's water?

The contaminants EPA monitoring detected in Sweetgrass include Nitrate-Nitrite, Copper, TTHM, Chloroform, Total Haloacetic Acids (HAA5). 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.