E. coli (Escherichia coli) violations in Montana
75 active public water systems in Montana had a E. coli (Escherichia coli) violation in the past three years, 75 of them in the latest quarter of EPA's data. What E. coli (Escherichia coli) is and why it matters.
Systems with a E. coli (Escherichia coli) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Lame Deer Water System County |
2,605 | 4 | 2 | |
|
Red Lodge Mtn Main Lodge Red Lodge · Carbon County |
2,006 | 1 | 0 | |
|
Dena Mora Saltese West Rest Saltese · Mineral County |
2,000 | 3 | 0 | |
|
Blue Basket Market Bozeman Bozeman · Gallatin County |
1,508 | 2 | 1 | |
|
Cenex Zip Trip Num 50 Park City · Stillwater County |
1,500 | 3 | 1 | |
|
Bobs Valley Service INC Helena · Lewis and Clark County |
1,032 | 2 | 1 | |
|
Hardin Westbound Rest Area Hardin · Big Horn County |
715 | 2 | 0 | |
|
Cascade Town of Cascade · Cascade County |
650 | 1 | 0 | |
|
Nevada City Helena · Madison County |
621 | 2 | 0 | |
|
Town Pump Travel Plaza Glendive Glendive · Dawson County |
600 | 3 | 1 | |
|
Westgate Cenex Glendive · Dawson County |
600 | 2 | 0 | |
|
Wilson Foods Arlee · Lake County |
600 | 2 | 1 | |
|
Wibaux Town of Wibaux · Wibaux County |
550 | 8 | 0 | |
|
Our Lady of the Valley Catholic Church Helena · Lewis and Clark County |
502 | 1 | 1 | |
|
Discovery Ski Area Anaconda · Granite County |
401 | 2 | 0 | |
|
Bridger Rest Area Silesia · Carbon County |
400 | 2 | 1 | |
|
Ksanka Motel and Mini Mart Eureka · Lincoln County |
305 | 2 | 1 | |
|
Haufbrau Anaconda · Deer Lodge County |
300 | 1 | 0 | |
|
Kims Marina and Resort Helena · Lewis and Clark County |
300 | 3 | 2 | |
|
Forlorn Hope LLC Missoula · Missoula County |
262 | 3 | 1 | |
|
Allard's Stage Stop County |
260 | 3 | 1 | |
|
Wise River Club Wise River · Beaverhead County |
208 | 1 | 0 | |
|
Lazy I Public House, LLC Dba Lazy I Beer Wolf Creek · Lewis and Clark County |
205 | 2 | 1 | |
|
Camp Paxson Seeley Lake · Missoula County |
200 | 2 | 0 | |
|
Cinnabar the Corwin Springs · Park County |
175 | 1 | 1 | |
|
Hellgate Campground Helena · Lewis and Clark County |
175 | 3 | 1 | |
|
Yellowstone Alliance Adventures Bozeman · Gallatin County |
158 | 2 | 0 | |
|
Martinsdale Colony Martinsdale · Wheatland County |
150 | 2 | 1 | |
|
Philipsburg Bay Campground Philipsburg · Granite County |
138 | 2 | 0 | |
|
MT Steakhouse Lincoln · Lewis and Clark County |
133 | 3 | 1 | |
|
Dodson Town of Dodson · Phillips County |
120 | 5 | 1 | |
|
Jackson Creek Bar and Grille Clancy · Jefferson County |
115 | 2 | 1 | |
|
7 R Guest Ranch Wolf Creek · Lewis and Clark County |
108 | 2 | 1 | |
|
Town Haul Diner Harrison · Madison County |
107 | 2 | 1 | |
|
Rock Creek Fishermans Merc Clinton · Missoula County |
104 | 2 | 0 | |
|
N8v Grown Charlo · Lake County |
103 | 3 | 2 | |
|
Causeway Chalet Helena · Lewis and Clark County |
100 | 3 | 1 | |
|
Lahood Park Cardwell Cardwell · Jefferson County |
94 | 2 | 0 | |
|
Templed Hills Baptist Camp Livingston · Park County |
82 | 3 | 0 | |
|
Rau School District NO 21 Sidney · Richland County |
80 | 3 | 2 | |
|
South Chouteau County Water Dist Highwood · Chouteau County |
80 | 5 | 3 | |
|
Mvp Holding LLC Missoula · Missoula County |
74 | 2 | 1 | |
|
Emmanuel Lutheran Church Shepherd · Yellowstone County |
70 | 1 | 1 | |
|
Mission Valley United Methodist Church St Ignatius · Lake County |
70 | 1 | 1 | |
|
Melrose Bar Melrose · Silver Bow County |
64 | 3 | 0 | |
|
Silver Tip Junction Sanders County |
62 | 3 | 1 | |
|
Rivers Edge Mobile Park Libby Libby · Lincoln County |
60 | 3 | 1 | |
|
Water Resources Division Missoula · Missoula County |
60 | 8 | 1 | |
|
Montana City Mercantile Hardware Cafe Clancy · Jefferson County |
56 | 2 | 0 | |
|
Lost Trail Hot Springs Resort Sula · Ravalli County |
54 | 3 | 2 |
About this data
A system is counted once if any of its violations in the past three years involved E. coli (Escherichia coli), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not E. coli (Escherichia coli) 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.