All water systems in Montana
2,352 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Big Stack Estates Great Falls · Cascade County |
60 | 1 | 0 | |
|
Billings Peterbilt Billings · Yellowstone County |
60 | 2 | 0 | |
|
Birdland Bay RV Resort Thompson Falls · Sanders County |
60 | 0 | 0 | |
|
Blue Cloud Subdivision Helena · Lewis and Clark County |
60 | 1 | 0 | |
|
Blue Grass Water Users Association Billings · Yellowstone County |
60 | 2 | 0 | |
|
Bonner Millsite PWS Bonner · Missoula County |
60 | 0 | 0 | |
|
Bonnie's Place INC Missoula · Missoula County |
60 | 1 | 1 | |
|
Condon Work Center Condon · Missoula County |
60 | 1 | 0 | |
|
Elk Creek Mennonite Church Simms · Cascade County |
60 | 1 | 0 | |
|
Florence Baptist Church Florence · Ravalli County |
60 | 0 | 0 | |
|
Gateway Village System 4 Gallatin Gateway · Gallatin County |
60 | 0 | 0 | |
|
Halfmoon Mobile Home Park INC Columbia Falls · Flathead County |
60 | 1 | 0 | |
|
Hook U UP RV Park Libby Libby · Lincoln County |
60 | 1 | 0 | |
|
Kid Corral Day Care Shepherd · Yellowstone County |
60 | 2 | 0 | |
|
Pacific Steel and Recycling Billings · Yellowstone County |
60 | 1 | 0 | |
|
Ponderosa Mobile Home Park Corvallis · Ravalli County |
60 | 0 | 0 | |
|
Ridgeview Subdivision Phase One Billings · Yellowstone County |
60 | 2 | 1 | |
|
Rivers Edge Mobile Park Libby Libby · Lincoln County |
60 | 3 | 1 | |
|
Sanders Water System Arlee · Lake County |
60 | 3 | 0 | |
|
Sky View Estates Kalispell · Flathead County |
60 | 1 | 0 | |
|
South Hills Water Users Association Polson · Lake County |
60 | 0 | 0 | |
|
Strobel Trailer Court Big Timber · Sweet Grass County |
60 | 0 | 0 | |
|
Tall Boys Tavern Hobson · Judith Basin County |
60 | 0 | 0 | |
|
The Falls Mobile Home Community Great Falls · Cascade County |
60 | 0 | 0 | |
|
Twin Acres Trailer Court Kalispell · Flathead County |
60 | 1 | 0 | |
|
Water Resources Division Missoula · Missoula County |
60 | 8 | 1 | |
|
West Shore Flathead MT ST Park Lakeside · Lake County |
60 | 0 | 0 | |
|
Willow Creek School Dist NO 15 Willow Creek · Gallatin County |
60 | 0 | 0 | |
|
Antelope County Water and Sewer Antelope · Sheridan County |
59 | 3 | 0 | |
|
Circle J Trailer Court Missoula · Missoula County |
59 | 0 | 0 | |
|
Dreamcatcher Tipi Hotel Unapproved Gardiner · Park County |
59 | 2 | 0 | |
|
Ayers Hutterite Colony Grass Range · Fergus County |
58 | 0 | 0 | |
|
Beaverhead Jackson Water and Sewer Dist Jackson · Beaverhead County |
58 | 4 | 2 | |
|
Bridger Pines County W and S District Bozeman · Gallatin County |
58 | 0 | 0 | |
|
Brush Lake State Park Dagmar · Sheridan County |
58 | 1 | 0 | |
|
Carousel Roller Rink Libby · Lincoln County |
58 | 0 | 0 | |
|
Cathedral Mountain Ranch Nye · Stillwater County |
58 | 1 | 0 | |
|
Dickey Lake Campground North Fortine · Lincoln County |
58 | 1 | 0 | |
|
Feathered Pipe Ranch Helena · Lewis and Clark County |
58 | 1 | 0 | |
|
Happy Hour Bar and Lakeview Condos West Yellowstone · Gallatin County |
58 | 0 | 0 | |
|
Triple Divide Lodge Marion · Flathead County |
58 | 1 | 0 | |
|
Camp Marshall Polson · Lake County |
57 | 2 | 0 | |
|
Earth Elements Unapproved Gallatin Gateway · Gallatin County |
57 | 1 | 0 | |
|
Kampfire Steakhouse Missoula · Missoula County |
57 | 0 | 0 | |
|
Lds Church Belt Great Falls · Cascade County |
57 | 0 | 0 | |
|
Big Mountain Cider Works Kalispell · Flathead County |
56 | 1 | 0 | |
|
Big Sky Camp and RV Park Miles City · Custer County |
56 | 0 | 0 | |
|
Blackfoot Water System County |
56 | 3 | 0 | |
|
Glacier Basecamp Lodge Columbia Falls · Flathead County |
56 | 0 | 0 | |
|
King Ranch Colony Lewistown · Fergus County |
56 | 4 | 2 |
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.