PlainWater

Public Water Systems

2,263 active public water systems in MT, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.

Population Violations Health Violations Name
System Name Location Population Violations PFAS
Billings City Of Billings, MT 114,000 4 Clean
Missoula Water Missoula, MT 68,200 84 Clean
Great Falls City Of Great Falls, MT 60,000 26 Clean
Bozeman City Of Bozeman, MT 56,000 17 Clean
Butte Silverbow Water Dept Butte, MT 33,000 334 Clean
Helena Water System Helena, MT 32,091 68 Clean
Kalispell Public Works Kalispell, MT 25,000 224 Detected
Montana State University Bozeman Bozeman, MT 19,200 0 Clean
University of Montana Missoula, MT 15,000 26 Clean
Co Water Dist of Billings Heights Billings, MT 12,000 11 Clean
Belgrade City Of Belgrade, MT 10,460 285 Clean
Whitefish City Of Whitefish, MT 10,418 102 Clean
Havre City Of Havre, MT 9,921 76 Clean
West Yellowstone Town Of West Yellowstone, MT 9,899 203 Clean
Miles City City Of Miles City, MT 9,565 80 Clean
Malmstrom Air Force Base Malmstrom Air Force Base, MT 8,850 82 Detected
Flathead County Water and Sewer Kalispell, MT 7,775 19 Clean
Livingston City Of Livingston, MT 7,500 980 Clean
Anaconda Water Department Anaconda, MT 6,750 58 Clean
Laurel Municipal Water System Laurel, MT 6,339 141 Clean
Bigfork County Water and Sewer Bigfork, MT 6,100 43 Clean
Lewistown City Of Lewistown, MT 5,923 512 Clean
Lockwood Water and Sewer District Billings, MT 5,900 12 Clean
Rocky Mountain College Billings, MT 5,700 9 Clean
Hamilton City Of Hamilton, MT 5,585 18 Detected
Polson City Of Polson, MT 5,300 242 Clean
Sidney City Of Sidney, MT 5,000 6 Clean
Libby City Of Libby, MT 4,892 341 Clean
Glendive City Of Glendive, MT 4,873 278 Clean
Columbia Falls City Of Columbia Falls, MT 4,450 99 Clean
North Star Zoot Water Bozeman, MT 4,323 16 -
Dillon City Of Dillon, MT 4,300 16 Clean
River Rock County Water and Sewer Dist Belgrade, MT 4,200 176 Clean
Big Sky County Water and Sewer Dist 363 Big Sky, MT 4,132 97 Detected
Shelby City Of Shelby, MT 3,970 59 Clean
Hardin City Of Hardin, MT 3,500 63 Clean
Ridge Run Columbia Falls, MT 3,500 15 -
Lolo Water and Sewer Dist Lolo, MT 3,315 92 -
Quartz Flat Rest Stop East Missoula, MT 3,301 52 -
Quartz Flat Rest Stop West Missoula, MT 3,301 43 -
Glasgow City Of Glasgow, MT 3,253 51 -
Montana Technological University Butte, MT 3,200 179 -
Cut Bank City Of Cut Bank, MT 3,105 197 -
Source Giant Springs Inc Great Falls, MT 3,007 18 -
Dry Prairie Rural Water Authority Culbertson, MT 3,005 49 -
Dena Mora Saltese East Rest Missoula, MT 3,000 74 -
Montana State University Billings Billings, MT 2,999 0 Clean
Deer Lodge City Of Deer Lodge, MT 2,900 147 -
Glacier Park International Airport Kalispell, MT 2,680 31 -
Lehrkinds Big Spring Water Bozeman, MT 2,575 45 -
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