All water systems in Montana
2,352 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Terry Downtown Wua Terry · Prairie County |
115 | 2 | 0 | |
|
Valley West Trailer Court Lolo · Missoula County |
115 | 0 | 0 | |
|
Woodside Park County Water and Sewer Dis Thompson Falls · Sanders County |
115 | 1 | 0 | |
|
Yacht Basin Marina and TR CT Helena · Lewis and Clark County |
115 | 2 | 0 | |
|
L and C Caverns State Park CG Cardwell · Jefferson County |
114 | 0 | 0 | |
|
Mountain View Colony Broadview · Yellowstone County |
114 | 1 | 0 | |
|
Savage Public School Savage · Richland County |
114 | 2 | 0 | |
|
Bear Canyon Campground Bozeman · Gallatin County |
112 | 0 | 0 | |
|
Best Western Plus Flathead Lake Inn Kalispell · Flathead County |
112 | 0 | 0 | |
|
Drunk'n Miner Copper Spirits Casino Butte · Silver Bow County |
112 | 0 | 0 | |
|
Finley Point Grill Polson · Lake County |
112 | 0 | 0 | |
|
North Baker Water and or Sewer Dist Baker · Fallon County |
112 | 0 | 0 | |
|
Pondera Colony Water Systems Valier · Pondera County |
112 | 0 | 0 | |
|
Hitchin Post the Melrose · Silver Bow County |
111 | 1 | 0 | |
|
Opheim Town of Opheim · Valley County |
111 | 0 | 0 | |
|
Bozeman #9 Town Pump Bozeman · Gallatin County |
110 | 0 | 0 | |
|
C Bar N Camp Augusta · Lewis and Clark County |
110 | 1 | 1 | |
|
Discovery Kid Zone Montessori Montana City · Jefferson County |
110 | 0 | 0 | |
|
Lds Church Superior Superior · Mineral County |
110 | 0 | 0 | |
|
Lewis and Clark Trailer Court Missoula · Missoula County |
110 | 0 | 0 | |
|
McNulty Investments Stevensville · Ravalli County |
110 | 0 | 0 | |
|
Montana Frontier Cafe Stevensville · Ravalli County |
110 | 2 | 0 | |
|
Mountain Lake Lodge Bigfork · Lake County |
110 | 0 | 0 | |
|
Roy Water and Sewer District Roy · Fergus County |
110 | 2 | 0 | |
|
Trestle Creek I and II St Regis · Mineral County |
110 | 0 | 0 | |
|
Windmill Trailer Park Well 1 Livingston · Park County |
110 | 0 | 0 | |
|
7715 Ownership LLC Bozeman · Gallatin County |
109 | 0 | 0 | |
|
Double Arrow Lodge Seeley Lake · Missoula County |
109 | 0 | 0 | |
|
7 R Guest Ranch Wolf Creek · Lewis and Clark County |
108 | 2 | 1 | |
|
Country Side RV Park Dillon · Beaverhead County |
108 | 0 | 0 | |
|
Craig Bar Wolf Creek · Lewis and Clark County |
108 | 2 | 0 | |
|
Crazy Mountain Ranch Clyde Park · Park County |
108 | 0 | 0 | |
|
Headwaters Livestock Auction Three Forks · Broadwater County |
108 | 1 | 0 | |
|
Madison County Golf Assoc Ennis · Madison County |
108 | 1 | 0 | |
|
Prince of Peace Lutheran Missoula · Missoula County |
108 | 2 | 0 | |
|
Souths Country Store Helena · Lewis and Clark County |
108 | 2 | 1 | |
|
Thompson Falls Family Dollar Store Thompson Falls · Sanders County |
108 | 0 | 0 | |
|
Windiggers Casino Kalispell · Flathead County |
108 | 0 | 0 | |
|
Bear's Lair Florence · Ravalli County |
107 | 2 | 0 | |
|
Big Sky Colony Cut Bank Cut Bank · Glacier County |
107 | 2 | 0 | |
|
Lodges on Seeley Lake Seeley Lake · Missoula County |
107 | 0 | 0 | |
|
Montana Bonfire LLC Bigfork - Lake Co · County |
107 | 1 | 0 | |
|
Town Haul Diner Harrison · Madison County |
107 | 2 | 1 | |
|
Bee Hive Homes Msla Missoula · Missoula County |
106 | 1 | 0 | |
|
Camp Utmost Greenough · Missoula County |
106 | 0 | 0 | |
|
Lewis and Clark Caverns Visitor Contact Cardwell · Jefferson County |
106 | 0 | 0 | |
|
MT Ellis Academy Bozeman · Gallatin County |
106 | 2 | 1 | |
|
MT Law Enforcement Academy Helena · Lewis and Clark County |
106 | 0 | 0 | |
|
Olsons Lolo Hot Springs Lolo · Missoula County |
106 | 1 | 0 | |
|
Poor Henrys Bar and Cafe Clinton · Missoula County |
106 | 0 | 0 |
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.