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Tap water quality report

Deer Lodge, MT

EPA monitoring detected 10 contaminants across the 2 water suppliers serving Deer Lodge. 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
5,000
people served
10
contaminants found
Montana rankings Lead in Montana PFAS in Montana

What was found in Deer Lodge'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
720 µg/L 7.2%
of the EPA limit 10000 µg/L
Main supplier: DEER LODGE CITY OF · 2,900 people · 2019
Highest in the city: 1134 µg/L — MONTANA STATE PRISON · 2,100 people · 2019
2/2 SYR4
Fluoride
900 µg/L 23%
of the EPA limit 4000 µg/L
Main supplier: DEER LODGE CITY OF · 2,900 people · 2014
2/2 SYR4
Copper
450 µg/L 35%
of the EPA limit 1300 µg/L
Main supplier: DEER LODGE CITY OF · 2,900 people · 2017
2/2 SYR4
Barium
149 µg/L 7.5%
of the EPA limit 2000 µg/L
Highest in the city: MONTANA STATE PRISON · 2,100 people · 2013
1/2 SYR4
Lead
23.8 µg/L 159%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: DEER LODGE CITY OF · 2,900 people · 2017
2/2 SYR4
Arsenic
16 µg/L 160%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
Main supplier: DEER LODGE CITY OF · 2,900 people · 2017
2/2 SYR4
Combined Uranium
9 µg/L 30%
of the EPA limit 30 µg/L
Main supplier: DEER LODGE CITY OF · 2,900 people · 2017
2/2 SYR4
Combined Radium (-226 And -228)
4.935 pCi/L 99%
of the EPA limit 5 pCi/L
Main supplier: DEER LODGE CITY OF · 2,900 people · 2017
2/2 SYR4
Gross Alpha, Excl. Radon And U
2.68 pCi/L 18%
of the EPA limit 15 pCi/L
Main supplier: DEER LODGE CITY OF · 2,900 people · 2017
Highest in the city: 3.805 pCi/L — MONTANA STATE PRISON · 2,100 people · 2018
2/2 SYR4
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
Main supplier: DEER LODGE CITY OF · 2,900 people · 2017
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 Deer Lodge

SupplierPopulation served
DEER LODGE CITY OF 2,900
MONTANA STATE PRISON 2,100

Frequently asked questions about Deer Lodge tap water

Is Deer Lodge tap water safe to drink?

EPA testing detected 10 contaminants in the water serving Deer Lodge. 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 Deer Lodge?

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

What contaminants are in Deer Lodge's water?

The contaminants EPA monitoring detected in Deer Lodge include Nitrate-Nitrite, Fluoride, Copper, Barium, Lead. 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.