All water systems in Montana
2,352 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Great Northern Whitewater Resort West Glacier · Flathead County |
176 | 1 | 0 | |
|
ST Regis School Old Bldg St Regis · Mineral County |
176 | 0 | 0 | |
|
Arlee Junior High School Arlee · Lake County |
175 | 1 | 0 | |
|
Big Sky SD Ophir Elementary School Gallatin Gateway · Gallatin County |
175 | 3 | 0 | |
|
Cinnabar the Corwin Springs · Park County |
175 | 1 | 1 | |
|
Clydehurst Christian Ranch Mcleod · Sweet Grass County |
175 | 0 | 0 | |
|
Elk Meadows Ranchettes Frenchtown · Missoula County |
175 | 1 | 1 | |
|
Hellgate Campground Helena · Lewis and Clark County |
175 | 3 | 1 | |
|
Kootenai Creek Village Stevensville · Ravalli County |
175 | 0 | 0 | |
|
Mobile City Trailer Court Missoula · Missoula County |
175 | 0 | 0 | |
|
Mountain Heritage Water System East Helena · Lewis and Clark County |
175 | 0 | 0 | |
|
Summit House Restaurant Whitefish · Flathead County |
175 | 0 | 0 | |
|
Town View Estates Wua INC Helena · Lewis and Clark County |
175 | 0 | 0 | |
|
Campground ST Regis St Regis · Mineral County |
173 | 1 | 0 | |
|
Florence Carlton Community Church Florence · Missoula County |
172 | 1 | 0 | |
|
Westby Town of Westby · Sheridan County |
172 | 0 | 0 | |
|
Hoving Business Center Helena · Lewis and Clark County |
170 | 5 | 1 | |
|
Melstone Town of Melstone · Musselshell County |
170 | 1 | 1 | |
|
Mountain States Leasing Butte LLC Butte · Silver Bow County |
170 | 0 | 0 | |
|
Owl Creek Holland Lake Condon · Missoula County |
169 | 0 | 0 | |
|
Phillips County Zortman Water and Sewer Zortman · Phillips County |
169 | 1 | 0 | |
|
Jim and Marys RV Park Missoula · Missoula County |
166 | 1 | 0 | |
|
Bozeman Brick Block and Tile Bozeman · Gallatin County |
165 | 0 | 0 | |
|
Grandview Trailer Court Great Falls · Cascade County |
165 | 0 | 0 | |
|
Hawthorn Springs Property Owners Assoc Missoula · Missoula County |
165 | 0 | 0 | |
|
Rock Creek Cattle Company Deer Lodge · Powell County |
165 | 1 | 0 | |
|
Town Pump Bozeman #11 Lucky Lil Bozeman · Gallatin County |
165 | 0 | 0 | |
|
Hamilton Murdochs Hamilton · Ravalli County |
164 | 0 | 0 | |
|
Dickey Lake Bible Camp Trego Trego · Lincoln County |
163 | 1 | 0 | |
|
Fox Hill Estates Kalispell · Flathead County |
163 | 1 | 0 | |
|
Greenland Mobile Home Park Missoula · Missoula County |
163 | 0 | 0 | |
|
Lodge at McGregor Lake the Marion · Flathead County |
163 | 0 | 0 | |
|
Prairie Mobile Village Helena · Lewis and Clark County |
163 | 3 | 0 | |
|
Spring Meadows County Water District Missoula · Missoula County |
162 | 1 | 1 | |
|
Yellowstones Edge RV Park Livingston · Park County |
162 | 1 | 0 | |
|
Eagle Mount Bozeman · Gallatin County |
161 | 2 | 0 | |
|
Emkayan Village CO Water and Sewer Dist Libby · Lincoln County |
160 | 1 | 0 | |
|
Family Dollar Helena 13446 Unapproved Helena · Lewis and Clark County |
160 | 2 | 0 | |
|
Golden Sunlight Mines INC Whitehall · Jefferson County |
160 | 1 | 0 | |
|
Kila School District NO 20 Kalispell · Flathead County |
160 | 0 | 0 | |
|
Lds Church Drummond Drummond · Granite County |
160 | 0 | 0 | |
|
Liberty Baptist Church Helena · Lewis and Clark County |
160 | 0 | 0 | |
|
New Rockport Colony INC Choteau · Teton County |
160 | 2 | 0 | |
|
Pinewood Village Libby · Lincoln County |
160 | 1 | 0 | |
|
Potomac School Dist 11 Bonner · Missoula County |
160 | 1 | 0 | |
|
Rexford Town of Rexford · Lincoln County |
160 | 0 | 0 | |
|
Sunhaven Mobile Home Park Laurel · Yellowstone County |
160 | 1 | 0 | |
|
Wingate by Wyndham Butte · Silver Bow County |
160 | 3 | 0 | |
|
Echo Lake Cafe Bigfork - Lake Co · Flathead County |
158 | 0 | 0 | |
|
Hangmans Tree Wua Clancy · Jefferson County |
158 | 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.