All water systems in Montana
2,352 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Big Timber City of Big Timber · Sweet Grass County |
1,650 | 0 | 0 | |
|
Seeley Lake Water District Seeley Lake · Missoula County |
1,575 | 0 | 0 | |
|
Blue Basket Market Bozeman Bozeman · Gallatin County |
1,508 | 2 | 1 | |
|
Bridger Bowl Base Bozeman · Gallatin County |
1,507 | 0 | 0 | |
|
Two Medicine Water East Glacier County |
1,504 | 3 | 1 | |
|
Cenex Zip Trip Num 50 Park City · Stillwater County |
1,500 | 3 | 1 | |
|
Deer Park Chalet Bozeman · Gallatin County |
1,500 | 0 | 0 | |
|
Fort Benton City of Fort Benton · Chouteau County |
1,500 | 0 | 0 | |
|
Virginia City Water Dept Virginia City · Madison County |
1,500 | 3 | 0 | |
|
Whitehall Town of Whitehall · Jefferson County |
1,500 | 3 | 0 | |
|
University of Providence Great Falls · Cascade County |
1,472 | 1 | 0 | |
|
Rocky Boy Agency Water System County |
1,442 | 1 | 0 | |
|
Boulder City of Boulder · Jefferson County |
1,400 | 2 | 1 | |
|
Ennis Town of Ennis · Madison County |
1,400 | 1 | 0 | |
|
Grass Valley Industrial Park Missoula · Missoula County |
1,400 | 0 | 0 | |
|
Philipsburg Town of Philipsburg · Granite County |
1,360 | 2 | 1 | |
|
EL Mar Estates Msla CO Water Frenchtown · Missoula County |
1,350 | 0 | 0 | |
|
Grace Bible Church Bozeman · Gallatin County |
1,350 | 1 | 0 | |
|
Chinook City of Chinook · Blaine County |
1,300 | 1 | 0 | |
|
VA Medical Center Helena Fort Harrison · Lewis and Clark County |
1,275 | 0 | 0 | |
|
Black Eagle Cascade County Water Sewer Black Eagle · Cascade County |
1,233 | 0 | 0 | |
|
Lakeside Water System Lakeside · Flathead County |
1,225 | 0 | 0 | |
|
Wheat Montana at Muralts Travel Plaza Missoula · Missoula County |
1,225 | 2 | 2 | |
|
Town Pump Missoula 3 Missoula · Missoula County |
1,221 | 0 | 0 | |
|
McGowan Water Cond INC Missoula · Missoula County |
1,207 | 0 | 0 | |
|
Forest Park Water Rsid 24 Glendive · Dawson County |
1,200 | 1 | 0 | |
|
Helena Leisure LLC Helena · Lewis and Clark County |
1,200 | 1 | 0 | |
|
Town Pump Woodside 1 Corvallis, Victor · Ravalli County |
1,198 | 0 | 0 | |
|
Town Pump Lolo 2 Lolo · Missoula County |
1,156 | 0 | 0 | |
|
Valley Christian Cafeteria Missoula · Missoula County |
1,146 | 0 | 0 | |
|
Hungry Horse CO Water and Sewer District Hungry Horse · Flathead County |
1,135 | 1 | 0 | |
|
TA Missoula Missoula · Missoula County |
1,120 | 0 | 0 | |
|
Absarokee Water and Sewer Dist Absarokee · Stillwater County |
1,100 | 0 | 0 | |
|
Superior Town of Superior · Mineral County |
1,100 | 0 | 0 | |
|
Town Pump Florence 1 Florence · Ravalli County |
1,092 | 0 | 0 | |
|
Harlowton City of Harlowton · Wheatland County |
1,050 | 2 | 0 | |
|
Loves Travel Stop & Country Store Wye Missoula · Missoula County |
1,050 | 0 | 0 | |
|
Bobs Valley Service INC Helena · Lewis and Clark County |
1,032 | 2 | 1 | |
|
ST Mary Headquarters and CG West Glacier · Glacier County |
1,030 | 0 | 0 | |
|
Scobey City of Scobey · Daniels County |
1,026 | 0 | 0 | |
|
Florence Carlton School Florence · Ravalli County |
1,025 | 0 | 0 | |
|
Giant Springs State Park Great Falls · Cascade County |
1,011 | 0 | 0 | |
|
Harrington Bottling CO Butte · Silver Bow County |
1,001 | 0 | 0 | |
|
Big Sky Conoco Travel Shoppe Big Sky · Gallatin County |
1,000 | 2 | 0 | |
|
Fairview Town of Fairview · Richland County |
1,000 | 2 | 0 | |
|
Greycliff Rest Area Westbound Greycliff · Sweet Grass County |
1,000 | 1 | 0 | |
|
Logan Pass Visitors Center St Mary · Glacier County |
1,000 | 0 | 0 | |
|
Prairie Water Company Great Falls · Cascade County |
1,000 | 3 | 1 | |
|
White Sulphur Springs City of White Sulphur Springs · Meagher County |
1,000 | 4 | 1 | |
|
Hot Springs Municipal Water Hot Springs · Sanders County |
982 | 1 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Montana records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.