All water systems in Montana
25 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
South Hills Water and Sewer Dist Billings · Yellowstone County |
350 | 1 | 1 | |
|
Hilltop Terrace NO 2 Columbia F Kalispell · Flathead County |
250 | 1 | 1 | |
|
Hillhaven Nursing Home Gallatin County |
125 | 0 | 0 | |
|
Hilltop Estates Richland County |
125 | 0 | 0 | |
|
Carbon Hill Enterprises Custer County |
100 | 0 | 0 | |
|
Hillcrest Estates Flathead County |
75 | 0 | 0 | |
|
Hilltop Terrace Flathead County |
75 | 0 | 0 | |
|
Hilltop Terrace-Flathead UT CO Flathead County |
75 | 0 | 0 | |
|
Sweetgrass Hills Subdivision Gallatin County |
75 | 0 | 0 | |
|
Spring Hill Work Center & CG Deer Lodge County |
72 | 0 | 0 | |
|
Springhill Mobile Home Park Gallatin County |
70 | 0 | 0 | |
|
Spring Hill Gallatin County |
65 | 0 | 0 | |
|
Hillcrest Trailer Court Dawson County |
60 | 0 | 0 | |
|
Kings Hill Campground Cascade County |
60 | 0 | 0 | |
|
Kings Hill Cascade County |
50 | 0 | 0 | |
|
Orchard Hills Mobile Home Park Bigfork - Lake Co · Lake County |
47 | 0 | 0 | |
|
Cherry Hill Yacht Club Condos Lakeside · Flathead County |
30 | 0 | 0 | |
|
Beavertail Hill Rec Area Missoula County |
25 | 0 | 0 | |
|
Hilltop Terrace Flathead County |
25 | 0 | 0 | |
|
Indian Hill Campground Cascade County |
25 | 0 | 0 | |
|
Western Hills Subdivision Lewis and Clark County |
25 | 0 | 0 | |
|
Hilltop Trailer Court Judith Basin County |
15 | 0 | 0 | |
|
Tvx Mineral Hill Mine Jardine Gardiner · Park County |
11 | 0 | 0 | |
|
Spirit Hills Water System Bozeman · Gallatin County |
0 | 0 | 0 | |
|
Sunny Hills Suburban Wua INC Glasgow · Valley County |
0 | 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.