Consumer Confidence Rule (CCR) violations in Montana
121 active public water systems in Montana had a Consumer Confidence Rule (CCR) violation in the past three years, 121 of them in the latest quarter of EPA's data. What Consumer Confidence Rule (CCR) is and why it matters.
Systems with a Consumer Confidence Rule (CCR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Cut Bank City of Cut Bank · Glacier County |
3,105 | 1 | 0 | |
|
Poplar, City of County |
3,025 | 5 | 2 | |
|
Montana State Prison Deer Lodge · Powell County |
2,100 | 8 | 1 | |
|
Sun Prairie Village County Great Falls · Cascade County |
1,800 | 1 | 0 | |
|
Harlowton City of Harlowton · Wheatland County |
1,050 | 2 | 0 | |
|
Prairie Water Company Great Falls · Cascade County |
1,000 | 3 | 1 | |
|
ST Ignatius Town of St Ignatius · Lake County |
700 | 4 | 1 | |
|
Genesis Business Park Bozeman · Gallatin County |
670 | 2 | 2 | |
|
Big Sandy Town of Big Sandy · Chouteau County |
608 | 2 | 0 | |
|
Cherry Creek Estates LLC Billings · Yellowstone County |
600 | 2 | 1 | |
|
Wibaux Town of Wibaux · Wibaux County |
550 | 8 | 0 | |
|
Two Buttes Water Users Assn Sun River · Cascade County |
525 | 1 | 0 | |
|
Wye Area Water System Missoula · Missoula County |
512 | 2 | 1 | |
|
Missoula KOA & EL Mar Tlr Village Missoula · Missoula County |
499 | 3 | 1 | |
|
McHugh Mobile Home Park Helena · Lewis and Clark County |
490 | 1 | 1 | |
|
Treasure State Acres Wua Helena · Lewis and Clark County |
483 | 1 | 0 | |
|
Tri County Water District Fairfield · Teton County |
470 | 3 | 1 | |
|
North Valley County Water and Sewer Dist St Marie · Valley County |
450 | 5 | 2 | |
|
Bushard Water Company Great Falls · Cascade County |
425 | 3 | 1 | |
|
Golden Estates Homeowners Association Helena · Lewis and Clark County |
400 | 2 | 0 | |
|
Forest Acres TR PK Whitefish Whitefish · Flathead County |
390 | 1 | 1 | |
|
Grant Creek Water Users Association INC Missoula · Missoula County |
380 | 1 | 1 | |
|
Dry Redwater Regional Water Authority Sidney · McCone County |
365 | 2 | 1 | |
|
Bainville Town of Bainville · Roosevelt County |
350 | 2 | 1 | |
|
Sun Prairie Water District Great Falls · Cascade County |
350 | 5 | 1 | |
|
Emerald View Park Billings · Yellowstone County |
320 | 2 | 0 | |
|
Cooke City Water District Cooke City · Park County |
300 | 1 | 0 | |
|
Keller Subdivision NO 2 HOA Dillon · Beaverhead County |
300 | 2 | 0 | |
|
Nashua Town of Nashua · Valley County |
300 | 3 | 1 | |
|
Jette Lake Landowners Association Polson · Lake County |
295 | 1 | 1 | |
|
Trapper Creek Job Corps Darby · Ravalli County |
275 | 4 | 0 | |
|
Winifred Town of Winifred · Fergus County |
274 | 7 | 1 | |
|
Hysham Town of Hysham · Treasure County |
262 | 4 | 0 | |
|
Blue Sky Heights Wua Clancy Clancy · Jefferson County |
250 | 4 | 1 | |
|
Heart Butte School County |
250 | 5 | 4 | |
|
Lexley Acres Mobile Home Park Belgrade · Gallatin County |
250 | 2 | 2 | |
|
Sorrel Springs HOA Frenchtown · Missoula County |
250 | 1 | 1 | |
|
Neihart Town of Neihart · Cascade County |
229 | 2 | 1 | |
|
Grass Land Estates Helena · Lewis and Clark County |
228 | 1 | 0 | |
|
Sage Creek CO Water District Chester · Liberty County |
225 | 3 | 1 | |
|
Casitas del Rio Glendive · Dawson County |
216 | 4 | 0 | |
|
Circle H Water INC Missoula · Missoula County |
215 | 1 | 0 | |
|
Flathead County Water Dist 101 Columbia Falls · Flathead County |
210 | 2 | 1 | |
|
Wagon Wheel Trailer Village Missoula · Missoula County |
210 | 1 | 1 | |
|
South Wind Water and Sewer District Great Falls · Cascade County |
200 | 2 | 1 | |
|
Davis Meadow Village East Helena · Lewis and Clark County |
180 | 1 | 0 | |
|
Sand Coulee Water Users District Sand Coulee · Cascade County |
180 | 3 | 2 | |
|
Prairie Mobile Village Helena · Lewis and Clark County |
163 | 3 | 0 | |
|
Angel Island Subdivision Troy · Lincoln County |
150 | 1 | 0 | |
|
Mountain View MB HM PK Townsend · Broadwater County |
150 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Consumer Confidence Rule (CCR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Consumer Confidence Rule (CCR) alone.
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.