All water systems in Montana
2,352 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Fromberg Town of Fromberg · Carbon County |
498 | 5 | 1 | |
|
Alberton Town of Alberton · Mineral County |
495 | 0 | 0 | |
|
Country Estates Water Supply Kalispell · Flathead County |
490 | 1 | 0 | |
|
McHugh Mobile Home Park Helena · Lewis and Clark County |
490 | 1 | 1 | |
|
Treasure State Acres Wua Helena · Lewis and Clark County |
483 | 1 | 0 | |
|
Custer CO Water and Sewer Dist Miles City · Custer County |
480 | 0 | 0 | |
|
Lodge Grass Town of Lodge Grass · Big Horn County |
480 | 2 | 1 | |
|
Cut Bank North Water District Santa Rita · Glacier County |
478 | 3 | 0 | |
|
Flathead CO Water District NO 8 Whitefish · Flathead County |
475 | 0 | 0 | |
|
Pryor Creek Water Assn Huntley · Yellowstone County |
475 | 1 | 0 | |
|
Green Meadow Country Club Helena · Lewis and Clark County |
471 | 1 | 1 | |
|
Bridger Brewing Three Forks Three Forks · Broadwater County |
470 | 0 | 0 | |
|
Grubstake Lounge and Restaurant Helena · Lewis and Clark County |
470 | 1 | 0 | |
|
Tri County Water District Fairfield · Teton County |
470 | 3 | 1 | |
|
Anaconda Interchange Rest Area Anaconda · Deer Lodge County |
465 | 1 | 0 | |
|
Olde Dairy Missoula · Missoula County |
460 | 0 | 0 | |
|
Sunburst Town of Sunburst · Toole County |
459 | 1 | 0 | |
|
Indian Springs Ranch Sub Eureka · Lincoln County |
455 | 3 | 0 | |
|
Frazer Water System County |
452 | 2 | 0 | |
|
Valier Town of Valier · Pondera County |
452 | 1 | 0 | |
|
Andesite Ridge Water System Big Sky · Madison County |
450 | 0 | 0 | |
|
Baxter Creek NO 2 HOA Bozeman · Gallatin County |
450 | 2 | 0 | |
|
Broadus Town of Broadus · Powder River County |
450 | 3 | 0 | |
|
Consolidated Charlo Lake CO W and S Dist Charlo · Lake County |
450 | 2 | 0 | |
|
Coram County Water and Sewer District Coram · Flathead County |
450 | 1 | 0 | |
|
Corvallis Primary School Corvallis · Ravalli County |
450 | 0 | 0 | |
|
Fort Smith Water and Sewer District Fort Smith · Big Horn County |
450 | 0 | 0 | |
|
Froid Town of Froid · Roosevelt County |
450 | 0 | 0 | |
|
Greenacres County Water and Sewer Dist Kalispell · Flathead County |
450 | 0 | 0 | |
|
North Valley County Water and Sewer Dist St Marie · Valley County |
450 | 5 | 2 | |
|
Showdown Ski Lift INC Neihart · Meagher County |
448 | 1 | 0 | |
|
Sanders County Harvest Foods Thompson Falls · Sanders County |
445 | 1 | 0 | |
|
Wilderness Club the Eureka · Lincoln County |
440 | 0 | 0 | |
|
Bushard Water Company Great Falls · Cascade County |
425 | 3 | 1 | |
|
Stanford Town of Stanford · Judith Basin County |
425 | 1 | 0 | |
|
Twin Bridges Town of Twin Bridges · Madison County |
424 | 0 | 0 | |
|
Culligan Water Facility Butte Butte · Silver Bow County |
423 | 2 | 1 | |
|
Mountain View Co-Op Ulm Ulm · Cascade County |
421 | 1 | 0 | |
|
Bonner School District NO 14 Bonner · Missoula County |
420 | 0 | 0 | |
|
Elder Grove School Buildings 1 & 2 Billings · Yellowstone County |
420 | 1 | 0 | |
|
Woodys Country Store Kalispell · Flathead County |
418 | 2 | 0 | |
|
Chico Hot Springs Pray · Park County |
415 | 0 | 0 | |
|
Blacktail Grocery Lakeside · Flathead County |
413 | 0 | 0 | |
|
Clearwater Bar Paws UP Ranch Greenough · Missoula County |
413 | 0 | 0 | |
|
Anderson Stevenson Wilke Funeral Home Helena · Lewis and Clark County |
411 | 1 | 0 | |
|
Bannack ST Park Visitor Center Dillon · Beaverhead County |
410 | 0 | 0 | |
|
Meadow Manor Kalispell · Flathead County |
410 | 2 | 0 | |
|
Park Cafe & Grocery County |
410 | 1 | 0 | |
|
Libby Christian Church Libby · Lincoln County |
406 | 0 | 0 | |
|
Pryor Water System County |
406 | 7 | 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.