All water systems in Montana
2,352 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Westgate Cenex Glendive · Dawson County |
600 | 2 | 0 | |
|
White Sandy Campground Helena · Lewis and Clark County |
600 | 1 | 0 | |
|
Wilson Foods Arlee · Lake County |
600 | 2 | 1 | |
|
Vaughn Cascade County Water and Sewer Vaughn · Cascade County |
585 | 1 | 0 | |
|
Fort Harrison Military Complex Fort Harrison · Lewis and Clark County |
580 | 1 | 0 | |
|
Jim Darcy School District NO 1 Helena · Lewis and Clark County |
575 | 1 | 0 | |
|
Frenchtown High School Frenchtown · Missoula County |
550 | 5 | 0 | |
|
Rossiter School District 01 Helena · Lewis and Clark County |
550 | 0 | 0 | |
|
Wibaux Town of Wibaux · Wibaux County |
550 | 8 | 0 | |
|
Busby Community Water System County |
535 | 2 | 1 | |
|
Montana City School Dist 27 Montana City · Jefferson County |
534 | 2 | 0 | |
|
T and T Subdivision Wolf Creek · Lewis and Clark County |
531 | 2 | 1 | |
|
Windsor Estates Billings · Yellowstone County |
530 | 2 | 1 | |
|
Two Buttes Water Users Assn Sun River · Cascade County |
525 | 1 | 0 | |
|
Town Pump Anaconda 1 Anaconda · Deer Lodge County |
524 | 0 | 0 | |
|
Snowbowl Lodge Missoula · Missoula County |
521 | 2 | 0 | |
|
Lincolns Silver Dollar Bar Haugan · Mineral County |
520 | 0 | 0 | |
|
Green Investments Frenchtown · Missoula County |
518 | 0 | 0 | |
|
Glacier Raft Company West Glacier · Flathead County |
515 | 0 | 0 | |
|
Wye Area Water System Missoula · Missoula County |
512 | 2 | 1 | |
|
Armington Jct Belt Rest Stop Belt · Cascade County |
510 | 2 | 0 | |
|
Caseys Corner Store NO 6 Big Sky · Gallatin County |
510 | 1 | 0 | |
|
Blessed Trinity Catholic Community Missoula · Missoula County |
508 | 0 | 0 | |
|
Trails End Ranch Ekalaka · Carter County |
508 | 1 | 0 | |
|
Peak Health and Wellness Center Missoula · Missoula County |
506 | 2 | 1 | |
|
Fortine Mercantile Trego · Lincoln County |
504 | 2 | 0 | |
|
Zootown Super Stop Missoula · Missoula County |
504 | 0 | 0 | |
|
Earthquake Lake Visitor Center West Yellowstone · Madison County |
503 | 2 | 0 | |
|
Eddies Corner Moore · Fergus County |
503 | 2 | 0 | |
|
Our Lady of the Valley Catholic Church Helena · Lewis and Clark County |
502 | 1 | 1 | |
|
Devils Elbow Rec Site Helena · Lewis and Clark County |
501 | 1 | 0 | |
|
Big Sky Water Slide Col Falls Columbia Falls · Flathead County |
500 | 0 | 0 | |
|
Box Elder School District 13g Box Elder · Hill County |
500 | 7 | 0 | |
|
Canyons Athletic Club the Hamilton · Ravalli County |
500 | 0 | 0 | |
|
Covered Wagon MB HM Park Bozeman · Gallatin County |
500 | 1 | 0 | |
|
Divide Feely North Rest Stop Butte · Silver Bow County |
500 | 0 | 0 | |
|
Divide Feely South Rest Stop Butte · Silver Bow County |
500 | 0 | 0 | |
|
Dutton Rest Stop Dutton · Teton County |
500 | 1 | 0 | |
|
Ennis S Raynolds Pass Rest Area Ennis · Madison County |
500 | 1 | 0 | |
|
Gore Hill County Water Dist Great Falls · Cascade County |
500 | 4 | 0 | |
|
Headquarters Apgar West Glacier · Flathead County |
500 | 0 | 0 | |
|
Highland Park Utilities Assn Glendive · Dawson County |
500 | 1 | 0 | |
|
Homestead Acres County Water and Sewer Black Eagle · Cascade County |
500 | 3 | 0 | |
|
Hysham Rest Area Westbound Hysham · Treasure County |
500 | 0 | 0 | |
|
Lds Church Columbia Falls Columbia Falls · Flathead County |
500 | 0 | 0 | |
|
Montana Resources LLC Butte · Silver Bow County |
500 | 0 | 0 | |
|
One Stop Hot Springs · Sanders County |
500 | 3 | 0 | |
|
Sage Lodge Emigrant · Park County |
500 | 0 | 0 | |
|
Yellowstone Travel Plaza Truck Stop Livingston · Park County |
500 | 2 | 0 | |
|
Missoula KOA & EL Mar Tlr Village Missoula · Missoula County |
499 | 3 | 1 |
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.