All water systems in Montana
2,352 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
MT Air Natl Guard 120th Air Lift Wing Great Falls · Cascade County |
350 | 0 | 0 | |
|
Saddle Mountain Corp Clancy Clancy · Jefferson County |
350 | 0 | 0 | |
|
Stillwater Christian School Kalispell · Flathead County |
350 | 0 | 0 | |
|
Sun Prairie Water District Great Falls · Cascade County |
350 | 5 | 1 | |
|
Valley Christian School North Missoula · Missoula County |
350 | 0 | 0 | |
|
Warren School District NO 1 Helena · Lewis and Clark County |
350 | 1 | 0 | |
|
Water Service INC Trout Creek Trout Creek · Sanders County |
350 | 0 | 0 | |
|
Riverside Water and Sewer Dist Bozeman · Gallatin County |
344 | 1 | 0 | |
|
Eastgate School District 09 East Helena · Lewis and Clark County |
342 | 0 | 0 | |
|
Martin City County Water District Martin City · Flathead County |
340 | 0 | 0 | |
|
Maverick Mountain Resort LLC Polaris · Beaverhead County |
340 | 2 | 0 | |
|
Dutton Town of Dutton · Teton County |
338 | 6 | 0 | |
|
Iron Horse Homeowners Assoc Whitefish · Flathead County |
335 | 0 | 0 | |
|
Clancy Elementary School Dist #1 Clancy · Jefferson County |
333 | 0 | 0 | |
|
Comstock Eureka · Lincoln County |
330 | 1 | 0 | |
|
Noxon Water District Noxon · Sanders County |
330 | 0 | 0 | |
|
Paws UP Angus Ranch Main Complex Greenough · Missoula County |
327 | 3 | 0 | |
|
K-M Scout Ranch Water System Great Falls · Fergus County |
325 | 0 | 0 | |
|
Zoomontana INC Billings · Yellowstone County |
324 | 0 | 0 | |
|
Forest Park Water Users Association Clancy · Jefferson County |
323 | 1 | 0 | |
|
Culligan of Missoula Missoula · Missoula County |
320 | 2 | 1 | |
|
Emerald View Park Billings · Yellowstone County |
320 | 2 | 0 | |
|
Lds Church Corvallis Corvallis · Ravalli County |
320 | 0 | 0 | |
|
Mountain Acres MB HM PK Lewistown · Fergus County |
320 | 2 | 0 | |
|
Rock Creek Resort Red Lodge Red Lodge · Carbon County |
320 | 2 | 0 | |
|
West Glacier RV Flathead County |
320 | 0 | 0 | |
|
Glacier View Golf Club West Glacier · Flathead County |
319 | 0 | 0 | |
|
Town Pump 1033 Big Timber # 2 Big Timber · Sweet Grass County |
318 | 0 | 0 | |
|
Big Sky Bible Camp – Cabins and Dining H Bigfork · Flathead County |
315 | 0 | 0 | |
|
Gsk Biologicals Hamilton · Ravalli County |
315 | 0 | 0 | |
|
Shiloh Road Development Billings · Yellowstone County |
315 | 1 | 0 | |
|
Stacey's Bar-The Westerner Gallatin Gateway · Gallatin County |
315 | 2 | 0 | |
|
Last Chance Chapel Helena · Lewis and Clark County |
313 | 1 | 0 | |
|
Best Burger Drive in Bozeman · Gallatin County |
310 | 2 | 1 | |
|
Ferndale Market Ferndale Bigfork - Lake Co · Flathead County |
310 | 0 | 0 | |
|
Aitkens Quick Stop Noxon · Sanders County |
306 | 0 | 0 | |
|
Log Gulch Recreation Site Blm Wolf Creek · Lewis and Clark County |
306 | 1 | 0 | |
|
Majestic Valley Arena Kalispell · Flathead County |
306 | 0 | 0 | |
|
Milltown (missoula) Dollar General Missoula · Missoula County |
306 | 0 | 0 | |
|
Southside Public Water Supply Somers · Flathead County |
306 | 0 | 0 | |
|
Archer Acres Whitefish · Flathead County |
305 | 1 | 0 | |
|
Avon Family Cafe Avon · Powell County |
305 | 1 | 0 | |
|
Ksanka Motel and Mini Mart Eureka · Lincoln County |
305 | 2 | 1 | |
|
Tongue River Campers Point Decker · Big Horn County |
305 | 0 | 0 | |
|
Two Sisters Babb · Glacier County |
305 | 1 | 0 | |
|
Montana City Dollar General Montana City · Jefferson County |
303 | 0 | 0 | |
|
Shepherd Dollar General Water System Shepherd · Yellowstone County |
303 | 0 | 0 | |
|
Thompson Falls Dollar General Thompson Falls · Sanders County |
303 | 0 | 0 | |
|
Victor Dollar General Victor · Ravalli County |
303 | 0 | 0 | |
|
Bozeman Hot Springs Campground & RV Park Bozeman · Gallatin County |
302 | 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.