685 water systems in Idaho have at least one health-based violation on record. The system with the most health-based violations is Mission Creek Water Assn in Bonners Ferry with 195 health-based violations. Health-based violations mean a system exceeded an EPA maximum contaminant level or failed required treatment standards.
| Water System | City | Population | Health Violations | Total Violations |
|---|
| Mission Creek Water Assn |
Bonners Ferry | 263 |
195 | 345 |
| Elk City Water and Sewer Assn |
Elk City | 320 |
114 | 150 |
| Idpr Dworshak Freeman Creek Cg (Corps) |
Lenore | 100 |
82 | 98 |
| Juliaetta City of |
Juliaetta | 624 |
81 | 112 |
| Meadow Lark Court LLC |
Ammon | 45 |
80 | 100 |
| Clearwater Water Dist |
Clearwater | 80 |
69 | 145 |
| Drake Subd |
Caldwell | 150 |
62 | 98 |
| Cedar Springs Community Water |
Sagle | 130 |
54 | 280 |
| Lewiston Roundup |
Lewiston | 50 |
50 | 128 |
| Bia North Idaho |
Lapwai | 490 |
49 | 456 |
| Partners Produce |
Payette | 50 |
49 | 146 |
| Aspen Ridge Subd |
Rexburg | 204 |
34 | 914 |
| Mccall City of |
Mccall | 4,423 |
33 | 213 |
| Valley View Subdivision |
Rexburg | 90 |
30 | 1,355 |
| Fruitland City of |
Fruitland | 7,135 |
30 | 39 |
| King Hill Domestic Water and Sewer |
King Hill | 87 |
30 | 39 |
| Red Rock Water LLC |
Lewiston | 60 |
29 | 153 |
| Indian Village |
Nampa | 225 |
26 | 74 |
| Castle Mountain Creeks Owners Assn |
Garden Valley | 250 |
26 | 66 |
| Fernan Estates Corporation |
Coeur D Alene | 37 |
26 | 34 |
| Bear River Hot Springs/Riverdale Resort |
Preston | 26 |
25 | 171 |
| New Hope Subd |
Lenore | 100 |
24 | 27 |
| Shotgun Cherokee Subd 5 |
Rexburg | 245 |
23 | 498 |
| Filer Water Works |
Filer | 2,858 |
23 | 77 |
| Bellevue City of |
Bellevue | 2,747 |
22 | 103 |
| Oakley Valley Water Corporation |
Oakley | 500 |
22 | 82 |
| Ashton City of |
Ashton | 1,129 |
22 | 38 |
| Ramsey Estates |
Coeur D'alene | 88 |
21 | 31 |
| Idaho Youth Ranch Hands of Promise |
Caldwell | 95 |
21 | 26 |
| Riverbend Estates |
American Falls | 92 |
20 | 93 |
| Country Court Community |
Grangeville | 89 |
20 | 67 |
| Shotgun North |
Rexburg | 285 |
18 | 373 |
| Last Chance General Store |
Island Park | 25 |
18 | 95 |
| Wayside Estates |
Heyburn | 50 |
18 | 88 |
| Super Pumper/Sinclair #5 |
Idaho Falls | 1,022 |
18 | 39 |
| Garden Valley Ranchettes Homeowners |
Garden Valley | 78 |
18 | 31 |
| Mountain Home Air Force Base |
Mountain Home Afb | 7,500 |
16 | 310 |
| Hammett Haven Apartments |
Mountain Home | 64 |
16 | 50 |
| Blacks Creek Rest Area Itd |
Boise | 25 |
16 | 35 |
| Salmon City of |
Salmon | 3,158 |
16 | 30 |
| Goose Bay Estates |
Rexburg | 184 |
15 | 100 |
| USFS Ohara Bar Campground |
Kamiah | 40 |
15 | 22 |
| Idaho City Water Dept |
Idaho City | 478 |
14 | 538 |
| Eaton Mobile Home Court |
Lewiston | 94 |
14 | 44 |
| Sage Hill Travel Center |
Fort Hall | 510 |
14 | 26 |
| Banida Winder Water and Sewer Dist |
Preston | 180 |
13 | 192 |
| Mi Pueblo Bakery & Taqueria |
Twin Falls | 25 |
13 | 50 |
| Scotch Pines Golf Course |
Payette | 25 |
13 | 34 |
| Riverside Park Campground |
Irwin | 200 |
13 | 25 |
| Little Blacktail Ranch Water District |
Athol | 95 |
13 | 21 |
| Camp Sweyolakan Camp Fire |
Coeur D Alene | 150 |
12 | 110 |
| Sheep Creek Rest Area Itd |
Lewiston | 25 |
12 | 44 |
| Bee Line Water Assn Inc |
Bonners Ferry | 533 |
12 | 24 |
| Meander Point Subd |
Twin Falls | 140 |
12 | 20 |
| Franklin Domestic Water Users |
Boise | 75 |
12 | 20 |
| Greenhills Estates 3 |
Meridian | 200 |
12 | 18 |
| Swan Valley Elementary |
Irwin | 82 |
12 | 16 |
| Twenty Mile Creek Water Assn |
Bonners Ferry | 225 |
12 | 12 |
| Ymca Horsethief Camp |
Boise | 220 |
11 | 49 |
| Reubens City of |
Reubens | 70 |
11 | 35 |
| Sunbeam Water |
Rockland | 60 |
11 | 24 |
| Goose Creek Rentals |
Indian Valley | 26 |
11 | 20 |
| Island Village Mobile Home Park |
Boise | 70 |
11 | 18 |
| Sunnyridge I Subd |
Nampa | 35 |
10 | 178 |
| Clearwater River Casino & Resort |
Lewiston | 650 |
10 | 110 |
| Alberts Landing |
Kingston | 100 |
10 | 55 |
| Lakeshore Market |
Nampa | 50 |
10 | 50 |
| Cassandra Hills Owners Assn |
St. Maries | 57 |
10 | 13 |
| Woodland Shores Water and Sewer Assn |
Coeur D Alene | 210 |
9 | 297 |
| Tlk Dairy |
Mountain Home | 75 |
9 | 125 |
| Canyon Inn |
Peck | 30 |
9 | 80 |
| Preston City of |
Preston | 5,591 |
9 | 54 |
| Greenhorn Subd |
Ketchum | 75 |
9 | 37 |
| Cherry Creek Trailer Park |
St. Maries | 25 |
9 | 34 |
| Terrace Lakes Water Company |
New Plymouth | 475 |
9 | 31 |
| Country Life Estates |
Idaho Falls | 250 |
9 | 24 |
| Camp Sawtooth Presbyterian |
Ketchum | 85 |
9 | 23 |
| Sunridge Dairy |
Twin Falls | 30 |
9 | 17 |
| Symms Fruit Ranch Inc |
Caldwell | 88 |
8 | 229 |
| Grandma Garcias Kitchen |
Rupert | 50 |
8 | 88 |
| Subway @ Island Park |
Island Park | 25 |
8 | 87 |
| Wilderness Ranch Owners Association Inc |
Boise | 525 |
8 | 69 |
| Train Station Pizza |
Buhl | 25 |
8 | 49 |
| Strawberry Mink Creek Water Assn |
Preston | 75 |
8 | 47 |
| Hillview Subd |
Rexburg | 50 |
8 | 31 |
| Sweet Montour School |
Emmett | 50 |
8 | 28 |
| Notus Stinker 60 |
Caldwell | 25 |
8 | 23 |
| Bittercreek Meadows Subdivision |
Meridian | 75 |
8 | 17 |
| Willowtree Estates Homeowner Association |
Meridain | 50 |
8 | 17 |
| Ohio Match Estates |
Rathdrum | 118 |
8 | 14 |
| Idpr Dworshak Three Meadows Grp Camp |
Lenore | 25 |
8 | 14 |
| Galena Mine Water System |
Wallace | 250 |
8 | 13 |
| Smiley Creek Water Users Assn Inc |
Ketchum | 117 |
7 | 421 |
| Bogus Basin Mtn Resort |
Boise | 750 |
7 | 127 |
| Paradise Estates Water Corp |
Boise | 273 |
7 | 67 |
| Lakeview Homeowners Assn Inc |
Firth | 80 |
7 | 50 |
| Capitol Water Corp |
Boise | 9,000 |
7 | 49 |
| Shotgun Kickapoo Subd 6 |
Rexburg | 65 |
7 | 49 |
| Franklin City of |
Franklin | 1,000 |
7 | 37 |
| Fairfield City of |
Fairfield | 441 |
7 | 29 |