Consumer Confidence Rule (CCR) violations in Montana
121 active public water systems in Montana had a Consumer Confidence Rule (CCR) violation in the past three years, 121 of them in the latest quarter of EPA's data. What Consumer Confidence Rule (CCR) is and why it matters.
Systems with a Consumer Confidence Rule (CCR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Stock Farm the Hamilton · Ravalli County |
150 | 2 | 1 | |
|
C & C Community INC Billings · Yellowstone County |
145 | 2 | 1 | |
|
Shelby Addition Water District Lolo · Missoula County |
145 | 1 | 1 | |
|
Stoney Brook Village Condominium Assoc Clancy · Jefferson County |
142 | 2 | 1 | |
|
C and D HOA Missoula · Missoula County |
140 | 1 | 1 | |
|
Sunny Meadows Water and Sewer Dist Missoula · Missoula County |
135 | 2 | 0 | |
|
Big Stone Colony INC Sand Coulee · Cascade County |
130 | 2 | 0 | |
|
Plevna Town of Plevna · Fallon County |
130 | 2 | 0 | |
|
Sage Creek Colony Chester · Liberty County |
130 | 2 | 0 | |
|
Hildreth Subdivision NO 3 Dillon · Beaverhead County |
128 | 2 | 1 | |
|
Country Estates Mble Home Park Columbia Falls · Flathead County |
125 | 1 | 0 | |
|
Bitterroot Meadows HOA Lolo Missoula · Missoula County |
120 | 1 | 1 | |
|
Dodson Town of Dodson · Phillips County |
120 | 5 | 1 | |
|
Wild Flower HOA the Hamilton · Ravalli County |
120 | 1 | 0 | |
|
Roy Water and Sewer District Roy · Fergus County |
110 | 2 | 0 | |
|
Big Sky Colony Cut Bank Cut Bank · Glacier County |
107 | 2 | 0 | |
|
Manhattan Camper Court Manhattan · Gallatin County |
105 | 3 | 0 | |
|
Big Bend Ranch Subdivision Great Falls · Cascade County |
100 | 4 | 1 | |
|
Gallatin Village Mob HM Park Bozeman · Gallatin County |
100 | 3 | 2 | |
|
Riverside Mobile Home Park Columbia Falls · Flathead County |
100 | 2 | 2 | |
|
Springwater Colony Harlowton · Wheatland County |
100 | 2 | 0 | |
|
North Forestvale Homeowners Helena · Lewis and Clark County |
98 | 2 | 0 | |
|
Camel Mountain HOA Helena · Lewis and Clark County |
96 | 1 | 0 | |
|
Camelot HOA Helena · Lewis and Clark County |
96 | 1 | 0 | |
|
Buzz Inn East Helena · Lewis and Clark County |
95 | 1 | 0 | |
|
Peks Mobile Home Court Billings · Yellowstone County |
95 | 3 | 0 | |
|
Midway Colony INC Conrad · Pondera County |
92 | 1 | 0 | |
|
Clearview Heights Lake County Water Dist Polson · Lake County |
90 | 1 | 0 | |
|
Masonic Home of Montana Helena · Lewis and Clark County |
90 | 1 | 0 | |
|
Ranch CO Water & Sewer Dist the Bigfork - Lake Co · Flathead County |
90 | 1 | 0 | |
|
Springhill Park Subdivision Bozeman · Gallatin County |
90 | 1 | 1 | |
|
Elkhorn Health and Rehabilitation LLC Clancy · Jefferson County |
89 | 3 | 0 | |
|
Heron Community Water System Heron · Sanders County |
84 | 1 | 0 | |
|
Flaxville Town of Flaxville · Daniels County |
82 | 4 | 1 | |
|
South Forestvale HOA Helena · Lewis and Clark County |
82 | 1 | 0 | |
|
Valley Water System the Missoula · Missoula County |
82 | 1 | 1 | |
|
Hidden Lake Colony Cut Bank · Glacier County |
80 | 2 | 1 | |
|
South Chouteau County Water Dist Highwood · Chouteau County |
80 | 5 | 3 | |
|
Spring Tree Ridge Great Falls · Cascade County |
80 | 4 | 2 | |
|
Devon Water INC Shelby · Toole County |
75 | 2 | 2 | |
|
McDonald Trailer CT East Helena · Lewis and Clark County |
75 | 3 | 0 | |
|
Skyline TR CT and RV Park Dillon · Beaverhead County |
75 | 3 | 1 | |
|
Western Mobile Village Dillon Dillon · Beaverhead County |
75 | 2 | 0 | |
|
Turah Meadows Missoula · Missoula County |
73 | 1 | 1 | |
|
Ethridge County Water District Shelby · Toole County |
70 | 2 | 1 | |
|
Forest View HOA Florence · Ravalli County |
65 | 2 | 1 | |
|
Hidden Heights HOA Missoula · Missoula County |
65 | 1 | 0 | |
|
Antelope County Water and Sewer Antelope · Sheridan County |
59 | 3 | 0 | |
|
Beaverhead Jackson Water and Sewer Dist Jackson · Beaverhead County |
58 | 4 | 2 | |
|
King Ranch Colony Lewistown · Fergus County |
56 | 4 | 2 |
About this data
A system is counted once if any of its violations in the past three years involved Consumer Confidence Rule (CCR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Consumer Confidence Rule (CCR) 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.