All water systems in Montana
2,352 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Fics Kwik Six Drummond · Granite County |
405 | 1 | 0 | |
|
Blue Bay Campground County |
404 | 0 | 0 | |
|
LA Casa Grande Water and Sewer District Helena · Lewis and Clark County |
404 | 2 | 2 | |
|
Seeley Lake Campground Seeley Lake · Missoula County |
404 | 0 | 0 | |
|
Discovery Ski Area Anaconda · Granite County |
401 | 2 | 0 | |
|
Ashland Water and Sewer District Ashland · Rosebud County |
400 | 5 | 0 | |
|
Bridger Rest Area Silesia · Carbon County |
400 | 2 | 1 | |
|
Custer Rest Area Eastbound Billings · Yellowstone County |
400 | 0 | 0 | |
|
Custer Rest Area Westbound Billings · Yellowstone County |
400 | 0 | 0 | |
|
Eagleman Community Water County |
400 | 3 | 0 | |
|
Ekalaka Town of Ekalaka · Carter County |
400 | 2 | 0 | |
|
Golden Estates Homeowners Association Helena · Lewis and Clark County |
400 | 2 | 0 | |
|
Heart Butte Water System County |
400 | 5 | 0 | |
|
Highwood Mobile Home Park Great Falls · Cascade County |
400 | 1 | 1 | |
|
Hysham Rest Area Eastbound Hysham · Treasure County |
400 | 0 | 0 | |
|
Lake McDonald Lodge West Glacier · Flathead County |
400 | 0 | 0 | |
|
Manhattan Christian Schools Manhattan · Gallatin County |
400 | 3 | 0 | |
|
Rising Sun Campground West Glacier · Glacier County |
400 | 0 | 0 | |
|
Roots Christian Fellowship Hamilton · Ravalli County |
400 | 0 | 0 | |
|
Round Butte Water Company Ronan · Lake County |
400 | 0 | 0 | |
|
Skyview Water and Sewer Utility Helena · Lewis and Clark County |
400 | 2 | 0 | |
|
Swiftcurrent Campground Babb · Glacier County |
400 | 1 | 0 | |
|
The Historic Florence Missoula · Missoula County |
400 | 0 | 0 | |
|
Trail Star Cafe and Truck Stop Glendive · Dawson County |
400 | 0 | 0 | |
|
Troy Rest Area Troy · Lincoln County |
400 | 1 | 0 | |
|
Wylie Creek Estates Subdivision Belgrade · Gallatin County |
400 | 0 | 0 | |
|
Yellowstone Commercial Center Manhattan · Gallatin County |
400 | 0 | 0 | |
|
Forest Acres TR PK Whitefish Whitefish · Flathead County |
390 | 1 | 1 | |
|
Grant Creek Water Users Association INC Missoula · Missoula County |
380 | 1 | 1 | |
|
Stillwater East Boulder Big Timber · Sweet Grass County |
380 | 0 | 0 | |
|
Stone Creek Subdivision Billings · Yellowstone County |
378 | 0 | 0 | |
|
Sundance Subdivision Billings · Yellowstone County |
378 | 0 | 0 | |
|
Brockton, Town of County |
375 | 1 | 0 | |
|
Gallatin Gateway Inn Gallatin Gateway · Gallatin County |
375 | 1 | 0 | |
|
Jette Meadows Lake CO W and S Dist Polson · Lake County |
375 | 0 | 0 | |
|
ST Regis Travel Center St Regis · Mineral County |
374 | 0 | 0 | |
|
Corner Store Bozeman Bozeman · Gallatin County |
373 | 0 | 0 | |
|
Dry Redwater Regional Water Authority Sidney · McCone County |
365 | 2 | 1 | |
|
Galloups Slide Inn INC Cameron · Madison County |
365 | 1 | 1 | |
|
Great Divide Ski Area Marysville · Lewis and Clark County |
364 | 0 | 0 | |
|
Jordan Town of Jordan · Garfield County |
364 | 5 | 1 | |
|
West Glacier KOA Campground West Glacier · Flathead County |
360 | 0 | 0 | |
|
ST Ignatius (mission) So.side County |
356 | 2 | 0 | |
|
MT Moonlight Basin Big Sky · Madison County |
355 | 0 | 0 | |
|
Cherry View Lakeside · Flathead County |
352 | 0 | 0 | |
|
Holter Lake Rec Site CG NO 15 Blm Wolf Creek · Lewis and Clark County |
352 | 0 | 0 | |
|
Bainville Town of Bainville · Roosevelt County |
350 | 2 | 1 | |
|
Firelight Meadows LLC Big Sky · Gallatin County |
350 | 0 | 0 | |
|
Hidden Lake Yellowstone County W and S D Billings · Yellowstone County |
350 | 1 | 0 | |
|
Lower Pioneer Mountain Water System Big Sky · Madison County |
350 | 0 | 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.