All water systems in Montana
2,352 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Gateway Village System 5 Gallatin Gateway · Gallatin County |
70 | 0 | 0 | |
|
Gildford Colony Gildford · Hill County |
70 | 0 | 0 | |
|
Hamilton Christian Academy Hamilton · Ravalli County |
70 | 1 | 0 | |
|
Hilltop Hitching Post Inn Marion · Flathead County |
70 | 1 | 0 | |
|
King Ranch Subdivision Frenchtown · Missoula County |
70 | 0 | 0 | |
|
Lds Church Ennis Ennis · Madison County |
70 | 0 | 0 | |
|
Meadow Brook Christian Fellowship Church Proctor · Lake County |
70 | 0 | 0 | |
|
Mission Valley United Methodist Church St Ignatius · Lake County |
70 | 1 | 1 | |
|
Montana Aviation Research CO Glasgow · Valley County |
70 | 0 | 0 | |
|
Namchak Retreat Ranch (nrr) South WS County |
70 | 1 | 0 | |
|
Natural Grocers Helena Helena · Lewis and Clark County |
70 | 1 | 0 | |
|
Ncmrwa Shelby to Ethridge Cut Bank · Toole County |
70 | 0 | 0 | |
|
Nine Mile Ranger Station and PA Huson · Missoula County |
70 | 1 | 0 | |
|
Pioneer School Dist 41 Billings · Yellowstone County |
70 | 0 | 0 | |
|
Pleasant Grove Manufactured Home Sites Lakeside · Flathead County |
70 | 1 | 0 | |
|
Point Service Corporation Bigfork - Lake Co · Lake County |
70 | 0 | 0 | |
|
Ponderosa MB Home Subd Bozeman · Gallatin County |
70 | 0 | 0 | |
|
Rapelje Water District Rapelje · Stillwater County |
70 | 2 | 1 | |
|
Red Cliff Campground Bozeman · Gallatin County |
70 | 1 | 0 | |
|
Sawtooth Villa Hamilton · Ravalli County |
70 | 0 | 0 | |
|
Shakopee Heights Water District Anaconda · Granite County |
70 | 0 | 0 | |
|
Sonju Industrial INC Kalispell · Flathead County |
70 | 0 | 0 | |
|
Storybook Hollow Billings · Yellowstone County |
70 | 0 | 0 | |
|
Wood Ridge HOA Kalispell · Flathead County |
70 | 0 | 0 | |
|
Zenith Colony Cut Bank · Glacier County |
70 | 0 | 0 | |
|
Curious Minds Preschool Corvallis · Ravalli County |
69 | 1 | 0 | |
|
Lazy K Bar Ranch Big Timber · Sweet Grass County |
69 | 0 | 0 | |
|
Torgersons Equipment G Falls Great Falls · Cascade County |
69 | 1 | 1 | |
|
Willow Glen Trailer Court Kspl Kalispell · Flathead County |
69 | 1 | 0 | |
|
Florence Medical Building Florence · Ravalli County |
68 | 0 | 0 | |
|
Gateway Village System 2 Gallatin Gateway · Gallatin County |
68 | 0 | 0 | |
|
Gateway Village System 3 Gallatin Gateway · Gallatin County |
68 | 0 | 0 | |
|
Kootenai River Campground and RV Troy · Lincoln County |
68 | 0 | 0 | |
|
Missoula Village West TR CT Missoula · Missoula County |
68 | 1 | 1 | |
|
Smith McHugh #2 Blr Helena · Lewis and Clark County |
68 | 0 | 0 | |
|
The Park Glasgow · Valley County |
68 | 3 | 0 | |
|
West River Road Hamilton · Ravalli County |
68 | 0 | 0 | |
|
Glessner Trailer Court Frenchtown · Missoula County |
67 | 0 | 0 | |
|
Milford Colony INC Wolf Creek · Lewis and Clark County |
67 | 7 | 0 | |
|
Belton Chalet West Glacier · Flathead County |
66 | 0 | 0 | |
|
Blackfeet Dorm. Water System County |
66 | 2 | 1 | |
|
Chief Martin Charlo Homesite County |
66 | 1 | 0 | |
|
Faith Baptist Church Missoula · Missoula County |
66 | 0 | 0 | |
|
Flathead Lake Biological Station U of M Polson · Lake County |
66 | 0 | 0 | |
|
Flthd Cty Road Maintenance Shop Kalispell · Flathead County |
66 | 0 | 0 | |
|
Goat Haunt Visitors Center West Glacier · Glacier County |
66 | 0 | 0 | |
|
Park 168 Bar & 520 Hotel West Yellowstone · Gallatin County |
66 | 1 | 1 | |
|
Big Spur TR CT Livingston · Park County |
65 | 1 | 0 | |
|
Carpenter Lake HOA Eureka · Lincoln County |
65 | 1 | 0 | |
|
Christian Childrens Ranch St Ignatius · Lake County |
65 | 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.