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Tap water quality report

Big Timber, MT

EPA monitoring detected 20 contaminants across the 3 water suppliers serving Big Timber. 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
1,760
people served
20
contaminants found
Montana rankings Lead in Montana PFAS in Montana

What was found in Big Timber'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
1285.5 µg/L 99%
of the EPA limit 1300 µg/L
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
3/3 SYR4
Nitrate-Nitrite
712 µg/L 7.1%
of the EPA limit 10000 µg/L
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
Highest in the city: 1210 µg/L — STROBEL TRAILER COURT · 60 people · 2019
3/3 SYR4
Fluoride
170 µg/L 4.3%
of the EPA limit 4000 µg/L
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
Highest in the city: 300 µg/L — COTTONWOOD ESTATES · 50 people · 2019
3/3 SYR4
Barium
69.5 µg/L 3.5%
of the EPA limit 2000 µg/L
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
Highest in the city: 138 µg/L — STROBEL TRAILER COURT · 60 people · 2018
2/3 SYR4
TTHM
10.75 µg/L 13%
of the EPA limit 80 µg/L
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
1/3 SYR4
Lead
8 µg/L 53%
of the EPA limit 15 µg/L
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
3/3 SYR4
Total Haloacetic Acids (HAA5)
7.51 µg/L 13%
of the EPA limit 60 µg/L
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
1/3 SYR4
Chloroform
7.24 µg/L
No EPA limit set
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
1/3 SYR4
Chromium
5 µg/L 5%
of the EPA limit 100 µg/L
Highest in the city: STROBEL TRAILER COURT · 60 people · 2018
1/3 SYR4
Gross Alpha, Excl. Radon And U
3.66 pCi/L 24%
of the EPA limit 15 pCi/L
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
Highest in the city: 4.2 pCi/L — COTTONWOOD ESTATES · 50 people · 2013
3/3 SYR4
Trichloroacetic Acid
3.87 µg/L
No EPA limit set
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
1/3 SYR4
Dichloroacetic Acid
3.51 µg/L
No EPA limit set
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
1/3 SYR4
Bromodichloromethane
3.19 µg/L
No EPA limit set
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
1/3 SYR4
Combined Uranium
2.9 µg/L 9.7%
of the EPA limit 30 µg/L
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
3/3 SYR4
Arsenic
1.9 µg/L 19%
of the EPA limit 10 µg/L
Highest in the city: STROBEL TRAILER COURT · 60 people · 2018
1/3 SYR4
Combined Radium (-226 And -228)
1.5 pCi/L 30%
of the EPA limit 5 pCi/L
Highest in the city: STROBEL TRAILER COURT · 60 people · 2018
1/3 SYR4
Selenium
1 µg/L 2%
of the EPA limit 50 µg/L
Highest in the city: STROBEL TRAILER COURT · 60 people · 2018
2/3 SYR4
Dibromochloromethane
0.9225 µg/L
No EPA limit set
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
1/3 SYR4
Dibromoacetic Acid
0.3300 µg/L
No EPA limit set
Main supplier: BIG TIMBER CITY OF · 1,650 people · 2019
1/3 SYR4
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
Main supplier: BIG TIMBER CITY OF · 1,650 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 Big Timber

SupplierPopulation served
BIG TIMBER CITY OF 1,650
STROBEL TRAILER COURT 60
COTTONWOOD ESTATES 50

Frequently asked questions about Big Timber tap water

Is Big Timber tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Big Timber. 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 Big Timber?

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

What contaminants are in Big Timber's water?

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