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 |
|---|---|---|---|---|
|
Hidden Valley Colony Gildford · Hill County |
80 | 1 | 0 | |
|
Ninepipes Lodge LLC Charlo · Lake County |
80 | 2 | 0 | |
|
South Chouteau County Water Dist Highwood · Chouteau County |
80 | 5 | 3 | |
|
Spring Tree Ridge Great Falls · Cascade County |
80 | 4 | 2 | |
|
Hideout LLC Deborgia · Mineral County |
79 | 3 | 0 | |
|
Livingston Paradise Valley KOA N Well 2 Livingston · Park County |
77 | 2 | 1 | |
|
Three Mile Mercantile Stevensville · Ravalli County |
77 | 1 | 0 | |
|
Corvallis SD Rise Charter Campus Corvallis · Ravalli County |
75 | 2 | 0 | |
|
Galilee Baptist Church Stevensville · Ravalli County |
75 | 1 | 0 | |
|
Happy Valley Missionary Baptist Church Whitefish · Flathead County |
75 | 1 | 0 | |
|
HI Heat Industries INC Lewistown · Fergus County |
75 | 2 | 0 | |
|
LA Quinta Inn and Suites Belgrade · Gallatin County |
75 | 1 | 0 | |
|
Lake Shore Lodge Mcallister · Madison County |
75 | 2 | 0 | |
|
Livingston Paradise Val KOA S Well NO 1 Livingston · Park County |
75 | 2 | 1 | |
|
McDonald Trailer CT East Helena · Lewis and Clark County |
75 | 3 | 0 | |
|
Swlo and Main Office Missoula · Missoula County |
75 | 7 | 0 | |
|
Mvp Holding LLC Missoula · Missoula County |
74 | 2 | 1 | |
|
Camp Child Elliston · Powell County |
72 | 3 | 1 | |
|
Polebridge Mercantile Polebridge · Flathead County |
72 | 2 | 1 | |
|
Mission Country Market St Ignatius · Lake County |
72 | 2 | 0 | |
|
Duck Creek Mobile Home Park Billings · Yellowstone County |
70 | 5 | 0 | |
|
Emerald Heights HOA Water & Sewer Dist Whitefish · Flathead County |
70 | 2 | 0 | |
|
Namchak Retreat Ranch (nrr) South WS County |
70 | 1 | 0 | |
|
Rapelje Water District Rapelje · Stillwater County |
70 | 2 | 1 | |
|
The Park Glasgow · Valley County |
68 | 3 | 0 | |
|
Milford Colony INC Wolf Creek · Lewis and Clark County |
67 | 7 | 0 | |
|
Elkhorn Ranch Gallatin Gateway · Gallatin County |
65 | 4 | 2 | |
|
Melrose Bar Melrose · Silver Bow County |
64 | 3 | 0 | |
|
Spring Creek CG and Trout Ranch Big Timber · Sweet Grass County |
64 | 2 | 0 | |
|
McAllister Lodging Mcallister · Madison County |
63 | 2 | 0 | |
|
Silver Tip Junction Sanders County |
62 | 3 | 1 | |
|
Lodgepole Campground Philipsburg · Granite County |
61 | 1 | 0 | |
|
Yellowstone Ice and Water Unapproved Billings · Yellowstone County |
61 | 2 | 0 | |
|
Billings Peterbilt Billings · Yellowstone County |
60 | 2 | 0 | |
|
Elk Creek Mennonite Church Simms · Cascade County |
60 | 1 | 0 | |
|
Kid Corral Day Care Shepherd · Yellowstone County |
60 | 2 | 0 | |
|
Sanders Water System Arlee · Lake County |
60 | 3 | 0 | |
|
Water Resources Division Missoula · Missoula County |
60 | 8 | 1 | |
|
Dreamcatcher Tipi Hotel Unapproved Gardiner · Park County |
59 | 2 | 0 | |
|
Beaverhead Jackson Water and Sewer Dist Jackson · Beaverhead County |
58 | 4 | 2 | |
|
Cathedral Mountain Ranch Nye · Stillwater County |
58 | 1 | 0 | |
|
Camp Marshall Polson · Lake County |
57 | 2 | 0 | |
|
Marvins Tavern Missoula · Missoula County |
56 | 1 | 0 | |
|
Light of the Valley Church Stevensville · Ravalli County |
55 | 2 | 0 | |
|
Wye Properties, LLC Missoula · Missoula County |
55 | 3 | 1 | |
|
Antler Saloon Wisdom · Beaverhead County |
54 | 2 | 0 | |
|
Full Curl Smokers Hobson · Judith Basin County |
54 | 1 | 0 | |
|
Kelly Raes Conoco Kalispell · Flathead County |
54 | 1 | 0 | |
|
Lost Trail Hot Springs Resort Sula · Ravalli County |
54 | 3 | 2 | |
|
Darrell Fenner 4h Camp Bigfork - Lake Co · Lake County |
53 | 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.