All water systems in Montana
128 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Blaine County Park Zurich Blaine County |
999 | 0 | 0 | |
|
Cedar Park Water Plant Billings · Yellowstone County |
600 | 1 | 1 | |
|
Berne Memorial Park Rest Stop Kalispell · Flathead County |
500 | 0 | 0 | |
|
Park Cafe St Mary · Glacier County |
437 | 0 | 0 | |
|
Park Grocery and Cafe St Mary · Glacier County |
437 | 0 | 0 | |
|
Giant Springs State Park Cascade County |
425 | 0 | 0 | |
|
Highland Park Water Assoc Dawson County |
300 | 0 | 0 | |
|
East Glacier Park CO Glacier County |
200 | 0 | 0 | |
|
Park Lake Campground Helena · Jefferson County |
200 | 1 | 0 | |
|
Forest Park Trailer Court #2 Gallatin County |
175 | 0 | 0 | |
|
Salmon Lake State Park Day Use Missoula · Missoula County |
152 | 0 | 0 | |
|
Hungry Horse Park Campground Flathead County |
150 | 0 | 0 | |
|
Side of the Road Trailer Park Nashua · Valley County |
144 | 0 | 0 | |
|
Shiloh Village Mobile HM Park Yellowstone County |
135 | 0 | 0 | |
|
Belgrade Business Park (unapproved) Belgrade · Gallatin County |
120 | 0 | 0 | |
|
Spring Creek RV Park, Bar and Grill Hardin · Big Horn County |
106 | 1 | 0 | |
|
Park City School VO AG Park City · Stillwater County |
103 | 0 | 0 | |
|
Chief Plenty Coups State Park Big Horn County |
100 | 0 | 0 | |
|
Logan State Park Lincoln County |
100 | 0 | 0 | |
|
Madison Buffalo Jump ST Park Gallatin County |
100 | 0 | 0 | |
|
Swan Village Market & RV Park Lake County |
100 | 0 | 0 | |
|
Tamarak Trailer Park Lincoln County |
100 | 0 | 0 | |
|
Tongue River Reservoir ST Park Big Horn County |
100 | 0 | 0 | |
|
Branding Iron RV Park Gallatin County |
90 | 0 | 0 | |
|
Eagle RV Park Sidney · Richland County |
80 | 2 | 1 | |
|
Amusement Park Drive in Laurel · Yellowstone County |
74 | 0 | 0 | |
|
Glacier Village Park Flathead County |
70 | 0 | 0 | |
|
Springhill Mobile Home Park Gallatin County |
70 | 0 | 0 | |
|
Four Corners Mobile Home Park Belgrade · Gallatin County |
68 | 0 | 0 | |
|
Wayside Mobile / RV Park Powder River County |
61 | 0 | 0 | |
|
Nelsons Mobile Home Park #2 Gallatin County |
60 | 0 | 0 | |
|
Park Road Trailer Court #1 Park County |
60 | 0 | 0 | |
|
Ponderosa Mobile Park Ravalli County |
60 | 0 | 0 | |
|
North Park Transportation (npt) Missoula · Missoula County |
55 | 0 | 0 | |
|
Hideaway Trailer Park Flathead County |
52 | 0 | 0 | |
|
Berne Memorial Park Flathead County |
50 | 0 | 0 | |
|
Bernie Park Rest Stop Flathead County |
50 | 0 | 0 | |
|
Donovan Park Hall Cascade County |
50 | 0 | 0 | |
|
Head Trailer Park Hill County |
50 | 0 | 0 | |
|
Lazy Wheel Trailer Park Lake County |
50 | 0 | 0 | |
|
Pine Tree Mobile Park Libby · Lincoln County |
50 | 0 | 0 | |
|
Rainbow Park Lake County |
50 | 0 | 0 | |
|
Riverside Park Yellowstone County |
50 | 0 | 0 | |
|
Stagecoach Trailer Park Mineral County |
50 | 0 | 0 | |
|
Valley Drive Mobile Home Park Miles City · Custer County |
50 | 0 | 0 | |
|
Wisdom Park Bar Park County |
50 | 0 | 0 | |
|
Orchard Hills Mobile Home Park Bigfork - Lake Co · Lake County |
47 | 0 | 0 | |
|
Four Mile RV Park Fairview · Richland County |
46 | 0 | 0 | |
|
Silver Creek Mobile Home Park Lewis and Clark County |
45 | 0 | 0 | |
|
Parker School Water System County |
42 | 1 | 1 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules currently in violation at EPA's latest data refresh.
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.