All water systems in Montana
2,352 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Rocky Mountain Supply Townsend Townsend · Broadwater County |
200 | 3 | 0 | |
|
Sitting Duck Bigfork - Lake Co · Lake County |
200 | 0 | 0 | |
|
Sky Eco Rentals LLC Coram · Flathead County |
200 | 1 | 0 | |
|
South Wind Water and Sewer District Great Falls · Cascade County |
200 | 2 | 1 | |
|
Spring Creek Coal Domestic Decker · Big Horn County |
200 | 1 | 0 | |
|
Spring Creek Mine Decker · Big Horn County |
200 | 0 | 0 | |
|
Target Range Trailer Court LLC Missoula · Missoula County |
200 | 1 | 0 | |
|
Tracy Water Users Corp Sand Coulee · Cascade County |
200 | 0 | 0 | |
|
Turner Mountain Ski Area Libby · Lincoln County |
200 | 0 | 0 | |
|
Western Energy Company Colstrip · Rosebud County |
200 | 0 | 0 | |
|
Yellowstone Drag Strip Acton · Yellowstone County |
200 | 1 | 0 | |
|
Blue Creek School Dist 3 Billings · Yellowstone County |
198 | 2 | 0 | |
|
Swan River School Dist 04 Kalispell · Flathead County |
197 | 0 | 0 | |
|
Cayuse Prairie School Dist NO 10 Kalispell · Flathead County |
195 | 0 | 0 | |
|
Corral Bar INC Gallatin Gateway · Gallatin County |
195 | 1 | 0 | |
|
Greenwood Village RV and MHP Kalispell · Flathead County |
195 | 0 | 0 | |
|
Rocky Mountain Twist Ronan · Lake County |
195 | 0 | 0 | |
|
Valley Garden Golf Village HOA Ennis · Madison County |
195 | 0 | 0 | |
|
Pine Hills Youth Correct Facil Miles City · Custer County |
193 | 1 | 0 | |
|
McGillivray Campground Libby · Lincoln County |
192 | 1 | 0 | |
|
Drummond Elementary School 2 Drummond · Granite County |
191 | 0 | 0 | |
|
Drummond High School 1 Drummond · Granite County |
191 | 0 | 0 | |
|
Cskt Division of Fire Management County |
190 | 7 | 1 | |
|
Days Inn Missoula Airport Missoula · Missoula County |
190 | 1 | 0 | |
|
Land of Magic Steakhouse Manhattan · Gallatin County |
190 | 0 | 0 | |
|
Star Mobile Home Park Bozeman · Gallatin County |
190 | 0 | 0 | |
|
Chapel of Praise Lincoln County |
188 | 0 | 0 | |
|
Pretty Eagle School County |
188 | 3 | 0 | |
|
Still River Estates Subdivision Billings · Yellowstone County |
188 | 3 | 0 | |
|
Winnett Town of Winnett · Petroleum County |
187 | 8 | 1 | |
|
Moore Town of Moore · Fergus County |
186 | 2 | 1 | |
|
Pele Park East Helena · Lewis and Clark County |
186 | 0 | 0 | |
|
Ramshorn View Estates Big Sky · Gallatin County |
185 | 0 | 0 | |
|
Victor Middle School and High School Victor · Ravalli County |
185 | 1 | 1 | |
|
Bair Clark Properties, LLC Missoula · Missoula County |
180 | 1 | 0 | |
|
Casitas del Mesa MHP Glendive · Dawson County |
180 | 1 | 0 | |
|
Cherry Creek Wua Glasgow Glasgow · Valley County |
180 | 5 | 0 | |
|
Copper Rose Ranch Livingston · Park County |
180 | 1 | 0 | |
|
Cross Point Community Church Missoula · Missoula County |
180 | 0 | 0 | |
|
Davis Meadow Village East Helena · Lewis and Clark County |
180 | 1 | 0 | |
|
Elkhorn Congregation of Jehovahs Witness Clancy · Jefferson County |
180 | 0 | 0 | |
|
Golden Age Village Corwin Springs · Park County |
180 | 1 | 0 | |
|
Richey Town of Richey · Dawson County |
180 | 1 | 0 | |
|
Saco Town of Saco · Phillips County |
180 | 0 | 0 | |
|
Sand Coulee Water Users District Sand Coulee · Cascade County |
180 | 3 | 2 | |
|
Simms High School Simms · Cascade County |
180 | 3 | 0 | |
|
Tamarack Woods HOA Lakeside Lakeside · Flathead County |
180 | 0 | 0 | |
|
Amsterdam School District 75 Manhattan · Gallatin County |
179 | 0 | 0 | |
|
Journey Church Columbia Falls · Flathead County |
179 | 0 | 0 | |
|
Ivanhoe Water INC Polson · Lake County |
178 | 2 | 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 currently 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.