Nitrate-Nitrite (Combined) violations in Montana
338 active public water systems in Montana had a Nitrate-Nitrite (Combined) violation in the past three years, 10 of them in the latest quarter of EPA's data. What Nitrate-Nitrite (Combined) is and why it matters.
Systems with a Nitrate-Nitrite (Combined) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Arena Investments LLC Eureka · Lincoln County |
52 | 2 | 0 | |
|
Checkerboard Bar Motel and TR CT Martinsdale · Meagher County |
52 | 2 | 0 | |
|
Post Creek 44 Tap and Steak House County |
52 | 1 | 0 | |
|
Augusta MT RV Park Augusta · Lewis and Clark County |
50 | 2 | 0 | |
|
District Court LLC Kalispell · Flathead County |
50 | 1 | 0 | |
|
Flowing Wells Rest Stop Jordan · Garfield County |
50 | 2 | 0 | |
|
Headwaters Picnic Area Three Forks · Gallatin County |
50 | 2 | 0 | |
|
Izaaks Craig · Lewis and Clark County |
50 | 2 | 0 | |
|
Lakeside on Hauser East Helena · Lewis and Clark County |
50 | 3 | 0 | |
|
Lucky Pick Casino Kalispell · Flathead County |
50 | 1 | 0 | |
|
Northern Lights Saloon Polebridge · Flathead County |
50 | 2 | 0 | |
|
Pine Creek Lodge Livingston · Park County |
50 | 3 | 0 | |
|
Silverado Motel and Lounge Eureka · Lincoln County |
50 | 1 | 0 | |
|
Silverado RV Park Eureka · Lincoln County |
50 | 2 | 0 | |
|
Trinity School District #4 in L & C CO Marysville · Lewis and Clark County |
50 | 2 | 0 | |
|
Turner Colony Turner · Blaine County |
50 | 7 | 2 | |
|
West Park Cenex Glendive Glendive · Dawson County |
50 | 2 | 0 | |
|
Western Bar Augusta · Lewis and Clark County |
49 | 2 | 0 | |
|
Wise River Ranger Station Wise River · Beaverhead County |
49 | 2 | 0 | |
|
East Malta Colony Malta · Phillips County |
47 | 3 | 0 | |
|
Fallon Water Well Association Fallon · Prairie County |
47 | 3 | 1 | |
|
Ringling Bar Ringling · Meagher County |
47 | 2 | 0 | |
|
The Bridge Bozeman · Gallatin County |
47 | 2 | 0 | |
|
Bolin Elementary School Dist 5 Terry · Prairie County |
45 | 5 | 0 | |
|
Elkhorn Hotsprings Resort LLC Polaris · Beaverhead County |
45 | 2 | 1 | |
|
Flathead Lake Resort Bigfork - Lake Co · Lake County |
45 | 1 | 0 | |
|
Forest Creek Subd Bozeman · Gallatin County |
45 | 2 | 0 | |
|
Posts Trailer Court Libby · Lincoln County |
45 | 4 | 0 | |
|
Turner Border Station Turner · Blaine County |
45 | 2 | 0 | |
|
Montana Mountain Riders LLC West Yellowstone · Gallatin County |
43 | 2 | 1 | |
|
Hansen Family Campground & Storage LLC Havre · Blaine County |
42 | 1 | 0 | |
|
Christian and Missionary Alliance Church Polson · Lake County |
40 | 2 | 0 | |
|
Diamond Motel and Campground LLC Terry · Prairie County |
40 | 2 | 1 | |
|
Gallatin River Lodge Bozeman · Gallatin County |
40 | 2 | 0 | |
|
Headwaters Campground Three Forks · Gallatin County |
40 | 2 | 0 | |
|
Red Rooster Bar Shepherd · Yellowstone County |
40 | 1 | 0 | |
|
Soda Butte Campground Cooke City · Park County |
40 | 2 | 0 | |
|
Wisdom Ranger Station Office Wisdom · Beaverhead County |
40 | 2 | 0 | |
|
2 Bar Lazy H Campground Butte · Silver Bow County |
37 | 2 | 0 | |
|
Raymond Border Station Raymond · Sheridan County |
37 | 1 | 0 | |
|
Mid Valley Center Stevensville · Ravalli County |
36 | 2 | 1 | |
|
Emigrant House Emigrant · Park County |
35 | 2 | 0 | |
|
Johnsons Mobile Home Park Libby · Lincoln County |
35 | 1 | 0 | |
|
Kingdom Hall of Jehovahs Witnesses Dillon · Beaverhead County |
35 | 2 | 0 | |
|
Sleeping Buffalo Hot Springs INC Saco · Phillips County |
35 | 3 | 1 | |
|
East Bay Subdivision County |
34 | 1 | 0 | |
|
Ryans Lot Missoula · Missoula County |
34 | 3 | 0 | |
|
Allens Manix Store Augusta · Lewis and Clark County |
33 | 1 | 0 | |
|
Diamond S RV Park Ronan Ronan · Lake County |
33 | 2 | 1 | |
|
Grassy Mountain Ranch White Sulphur Springs · Meagher County |
33 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Nitrate-Nitrite (Combined), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Nitrate-Nitrite (Combined) 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.