All water systems in Montana
2,352 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Bolin Elementary School Dist 5 Terry · Prairie County |
45 | 5 | 0 | |
|
Cottonwood Homes Kalispell · Flathead County |
45 | 0 | 0 | |
|
Cougar Meadows St Regis · Mineral County |
45 | 1 | 1 | |
|
Crystal Park Dillon · Beaverhead County |
45 | 0 | 0 | |
|
Elkhorn Hotsprings Resort LLC Polaris · Beaverhead County |
45 | 2 | 1 | |
|
Evergreen Subdivision Billings · Carbon County |
45 | 0 | 0 | |
|
Flathead Lake Resort Bigfork - Lake Co · Lake County |
45 | 1 | 0 | |
|
Forest Creek Subd Bozeman · Gallatin County |
45 | 2 | 0 | |
|
Garnet USA Alder · Madison County |
45 | 0 | 0 | |
|
Home 40 Public Water Supply Bozeman · Gallatin County |
45 | 2 | 0 | |
|
Jack Lincoln Memorial Clinic Mineral County |
45 | 0 | 0 | |
|
Kircher School Dist 03 Miles City · Custer County |
45 | 0 | 0 | |
|
Loenbro Office Building Black Eagle · Cascade County |
45 | 2 | 0 | |
|
Loring Hutterian Brethren INC Loring · Phillips County |
45 | 0 | 0 | |
|
Madison Double R Ranch Ennis · Madison County |
45 | 1 | 0 | |
|
Mission Valley Church of Christ Polson · Lake County |
45 | 0 | 0 | |
|
Mount Pleasant Estates Sidney · Richland County |
45 | 1 | 0 | |
|
Mountain Meadow Herbs Somers · Flathead County |
45 | 0 | 0 | |
|
Pleasant View Water and Sewer District Polson · Lake County |
45 | 0 | 0 | |
|
Posts Trailer Court Libby · Lincoln County |
45 | 4 | 0 | |
|
Sky Ranch Water Association Kalispell · Flathead County |
45 | 1 | 1 | |
|
Stokes Market Havre Havre · Hill County |
45 | 1 | 0 | |
|
Sunset Boulder MHP LLC Great Falls · Cascade County |
45 | 1 | 0 | |
|
Turner Border Station Turner · Blaine County |
45 | 2 | 0 | |
|
Valley View Elementary School County |
45 | 2 | 0 | |
|
Wards Cove Water Users Hamilton · Ravalli County |
45 | 0 | 0 | |
|
West Gate KOA Dorms West Yellowstone · Gallatin County |
45 | 0 | 0 | |
|
Woodlands Subdivision Kalispell · Flathead County |
45 | 0 | 0 | |
|
Alfresco RV & Storage Libby · Lincoln County |
44 | 0 | 0 | |
|
Bison Ridge Retreat Unapproved Whitefish · Flathead County |
44 | 1 | 0 | |
|
Hugh Black Family Lands County |
44 | 0 | 0 | |
|
Lake Mary Ronan State Park Proctor · Lake County |
44 | 0 | 0 | |
|
Moonlight Estates HOA Helena · Lewis and Clark County |
44 | 2 | 0 | |
|
Avista Utilities Noxon Rapids Dam Noxon · Sanders County |
43 | 0 | 0 | |
|
Birchwood Duplexes Missoula · Missoula County |
43 | 0 | 0 | |
|
Crown Passage Northwest LLC Girls Heron · Sanders County |
43 | 1 | 0 | |
|
Fort Three Forks Motel and RV PK Three Forks · Broadwater County |
43 | 0 | 0 | |
|
Lil Sprouts Daycare Florence · Ravalli County |
43 | 2 | 0 | |
|
Milltown Water Users Asso North Bonner · Missoula County |
43 | 0 | 0 | |
|
Montana Mountain Riders LLC West Yellowstone · Gallatin County |
43 | 2 | 1 | |
|
North Big Arm Bay Loa Elmo · Lake County |
43 | 0 | 0 | |
|
Stray Bullet Commercial Bldg Ovando · Powell County |
43 | 1 | 0 | |
|
Big Creek Campground Kalispell · Flathead County |
42 | 0 | 0 | |
|
Great Beginnings Montessori Foothills Bozeman · Gallatin County |
42 | 0 | 0 | |
|
Hansen Family Campground & Storage LLC Havre · Blaine County |
42 | 1 | 0 | |
|
Hearts and Hands Montessori Belgrade · Gallatin County |
42 | 0 | 0 | |
|
Lost Johnny Point Campground Kalispell · Flathead County |
42 | 1 | 0 | |
|
Mountain View Trailer Court Missoula · Missoula County |
42 | 0 | 0 | |
|
North Harlem Colony Harlem · Blaine County |
42 | 0 | 0 | |
|
Summit Mountain Lodge East Glacier · Flathead County |
42 | 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.