All water systems in Montana
2,352 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Big Sky School District NO 72 Gallatin Gateway · Gallatin County |
275 | 2 | 0 | |
|
Rocky Mountain HI RV Park Kalispell · Flathead County |
275 | 0 | 0 | |
|
Trapper Creek Job Corps Darby · Ravalli County |
275 | 4 | 0 | |
|
Bowers Market Corvallis Corvallis · Ravalli County |
274 | 0 | 0 | |
|
Farm to Market Store Libby · Lincoln County |
274 | 2 | 0 | |
|
Great Falls RV Park Great Falls · Cascade County |
274 | 0 | 0 | |
|
Kountry Korner Cafe Bozeman · Gallatin County |
274 | 2 | 0 | |
|
Winifred Town of Winifred · Fergus County |
274 | 7 | 1 | |
|
Heritage Christian School Bozeman · Gallatin County |
272 | 0 | 0 | |
|
Alpine Pacific Utilities Kalispell · Flathead County |
270 | 1 | 0 | |
|
Jefferson School District NO 1 Glendive · Dawson County |
270 | 2 | 1 | |
|
Ryegate Town of Ryegate · Golden Valley County |
270 | 3 | 0 | |
|
Amsterdam Village Lots 11 & 12 HOA Manhattan · Gallatin County |
268 | 0 | 0 | |
|
Larchmont Golf Course Missoula · Missoula County |
268 | 0 | 0 | |
|
Glacier View School County |
265 | 3 | 0 | |
|
Korner Klub Bozeman · Gallatin County |
264 | 2 | 0 | |
|
Taco Johns Reserve Missoula · Missoula County |
264 | 0 | 0 | |
|
Thorpe Commercial Center South Belgrade · Gallatin County |
264 | 0 | 0 | |
|
Fairmont RV Resort Anaconda · Silver Bow County |
263 | 2 | 0 | |
|
Chief Plenty Coups Museum Pryor · Big Horn County |
262 | 0 | 0 | |
|
Forlorn Hope LLC Missoula · Missoula County |
262 | 3 | 1 | |
|
Glacier Ridge HOA & Water Association West Glacier · Flathead County |
262 | 0 | 0 | |
|
Hysham Town of Hysham · Treasure County |
262 | 4 | 0 | |
|
Allard's Stage Stop County |
260 | 3 | 1 | |
|
Blacktail Mountain Ski Area Lakeside · Flathead County |
260 | 1 | 0 | |
|
Country Lake Homes Whitefish Whitefish · Flathead County |
260 | 0 | 0 | |
|
Fairfield Mennonite Church Fairfield · Teton County |
260 | 2 | 1 | |
|
Forest Park TR CT NO 1 Bozeman Bozeman · Gallatin County |
260 | 2 | 0 | |
|
Gardiner Business Park Gardiner · Park County |
260 | 1 | 0 | |
|
Geraldine Town of Geraldine · Chouteau County |
260 | 1 | 0 | |
|
H E Robinson VO AG Center Kalispell · Flathead County |
260 | 0 | 0 | |
|
Montana Precision Products Butte · Silver Bow County |
260 | 0 | 0 | |
|
Montana Council of Boy Scouts of America Big Arm · Lake County |
259 | 0 | 0 | |
|
Katoonah Lodges Missoula · Missoula County |
258 | 0 | 0 | |
|
North American RV Park Coram · Flathead County |
257 | 0 | 0 | |
|
Parkers Drummond · Granite County |
256 | 1 | 1 | |
|
Broadus Rest Area Broadus · Powder River County |
255 | 0 | 0 | |
|
Denton Town of Denton · Fergus County |
255 | 2 | 1 | |
|
Garnet Ghost Town Blm Drummond · Granite County |
254 | 1 | 0 | |
|
Montana Knife Company Frenchtown · Missoula County |
253 | 0 | 0 | |
|
Lolo Community Church Missoula · Missoula County |
252 | 0 | 0 | |
|
Gates of the Mountains INC Helena · Lewis and Clark County |
251 | 2 | 0 | |
|
Mariners Haven Subdivision Rexford · Lincoln County |
251 | 0 | 0 | |
|
Blue Sky Heights Wua Clancy Clancy · Jefferson County |
250 | 4 | 1 | |
|
Clark's Bay Rec Site Helena · Lewis and Clark County |
250 | 1 | 0 | |
|
Clinton School Clinton · Missoula County |
250 | 0 | 0 | |
|
Fox Water Service Incorporated Laurel · Yellowstone County |
250 | 0 | 0 | |
|
Granite Park Water Association Billings · Yellowstone County |
250 | 2 | 0 | |
|
Heart Butte School County |
250 | 5 | 4 | |
|
Helena RV and Mobile Home Park Helena · Lewis and Clark County |
250 | 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 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.