Revised Total Coliform Rule (RTCR) violations in Montana
620 active public water systems in Montana had a Revised Total Coliform Rule (RTCR) violation in the past three years, 204 of them in the latest quarter of EPA's data. What Revised Total Coliform Rule (RTCR) is and why it matters.
Systems with a Revised Total Coliform Rule (RTCR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Stillwater Getaway Whitefish · Flathead County |
25 | 3 | 2 | |
|
Tings Bar Jefferson City · Jefferson County |
25 | 2 | 0 | |
|
Ventures West Employee RV Park West Yellowstone · Gallatin County |
25 | 1 | 0 | |
|
Riceville Heights Subdivision Belt · Cascade County |
25 | 5 | 2 | |
|
Havre City of Havre · Hill County |
9,921 | 5 | 0 | |
|
Malmstrom Air Force Base Great Falls · Cascade County |
8,850 | 3 | 0 | |
|
Montana Technological University Butte · Silver Bow County |
3,200 | 1 | 0 | |
|
Poplar, City of County |
3,025 | 5 | 2 | |
|
Greycliff Rest Area Eastbound Greycliff · Sweet Grass County |
2,500 | 2 | 0 | |
|
Ronan City of Ronan · Lake County |
2,483 | 3 | 0 | |
|
Wheat Montana Bakery Bozeman · Broadwater County |
2,453 | 2 | 1 | |
|
Rae Water and Sewer Dist 313 Bozeman · Gallatin County |
2,325 | 1 | 0 | |
|
Pablo Lake County Water and Sewer Dist Pablo · Lake County |
2,175 | 2 | 0 | |
|
East Helena City of Helena · Lewis and Clark County |
2,114 | 1 | 0 | |
|
Montana State Prison Deer Lodge · Powell County |
2,100 | 8 | 1 | |
|
Stevensville Town of Stevensville · Ravalli County |
2,090 | 2 | 0 | |
|
Bearmouth Rest Stop Eastbound Drummond · Granite County |
2,000 | 1 | 0 | |
|
Bearmouth Rest Stop Westbound Drummond · Granite County |
2,000 | 1 | 0 | |
|
Dena Mora Saltese West Rest Saltese · Mineral County |
2,000 | 3 | 0 | |
|
Baker City of Baker · Fallon County |
1,858 | 3 | 0 | |
|
Cenex Zip Trip Num 50 Park City · Stillwater County |
1,500 | 3 | 1 | |
|
Virginia City Water Dept Virginia City · Madison County |
1,500 | 3 | 0 | |
|
Whitehall Town of Whitehall · Jefferson County |
1,500 | 3 | 0 | |
|
Grace Bible Church Bozeman · Gallatin County |
1,350 | 1 | 0 | |
|
Harlowton City of Harlowton · Wheatland County |
1,050 | 2 | 0 | |
|
Big Sky Conoco Travel Shoppe Big Sky · Gallatin County |
1,000 | 2 | 0 | |
|
Greycliff Rest Area Westbound Greycliff · Sweet Grass County |
1,000 | 1 | 0 | |
|
Deanos Travel Plaza Missoula · Missoula County |
959 | 2 | 0 | |
|
Oles Country Store Stevensville · Ravalli County |
820 | 2 | 0 | |
|
Bears Country Store Libby · Lincoln County |
805 | 2 | 0 | |
|
Caseys Corner 9 Gallatin Gateway · Gallatin County |
759 | 1 | 0 | |
|
Montana State Hospital Complex Warm Springs · Deer Lodge County |
721 | 5 | 1 | |
|
Bedrockbabb Water System County |
645 | 3 | 0 | |
|
Stillwater Mining Company Nye · Stillwater County |
630 | 1 | 0 | |
|
Belt Town of Belt · Cascade County |
600 | 2 | 0 | |
|
Blackfeet Community Hospital County |
600 | 3 | 1 | |
|
Jefferson City South Rest Stop Jefferson City · Jefferson County |
600 | 2 | 0 | |
|
Stokes Market Florence Florence · Ravalli County |
600 | 2 | 1 | |
|
Town Pump Travel Plaza Glendive Glendive · Dawson County |
600 | 3 | 1 | |
|
Wibaux Town of Wibaux · Wibaux County |
550 | 8 | 0 | |
|
Montana City School Dist 27 Montana City · Jefferson County |
534 | 2 | 0 | |
|
Armington Jct Belt Rest Stop Belt · Cascade County |
510 | 2 | 0 | |
|
Caseys Corner Store NO 6 Big Sky · Gallatin County |
510 | 1 | 0 | |
|
Trails End Ranch Ekalaka · Carter County |
508 | 1 | 0 | |
|
Fortine Mercantile Trego · Lincoln County |
504 | 2 | 0 | |
|
Earthquake Lake Visitor Center West Yellowstone · Madison County |
503 | 2 | 0 | |
|
Eddies Corner Moore · Fergus County |
503 | 2 | 0 | |
|
Devils Elbow Rec Site Helena · Lewis and Clark County |
501 | 1 | 0 | |
|
Dutton Rest Stop Dutton · Teton County |
500 | 1 | 0 | |
|
Ennis S Raynolds Pass Rest Area Ennis · Madison County |
500 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Revised Total Coliform Rule (RTCR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Revised Total Coliform Rule (RTCR) 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.