We found 65 public water systems that could serve the same population as 7 J (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Mahnomen | Mahnomen | 1,208 | 0 | 2 |
| Subway | County of Mahnomen | 500 | 0 | 0 |
| Waubun | Waubun | 407 | 0 | 10 |
| Pinehurst Resort And Lodge | County of Mahnomen | 260 | 0 | 0 |
| Elk Horn Resort And Camground | County of Mahnomen | 200 | 0 | 0 |
| Farmers Union Oil Pump 24 | County of Mahnomen | 120 | 0 | 0 |
| Bejou | Bejou | 93 | 0 | 0 |
| Circle's Of Faith Church | County of Mahnomen | 90 | 0 | 0 |
| Burger Hut | County of Mahnomen | 70 | 0 | 0 |
| Evergreen Acres Cooperative Assn. | County of Mahnomen | 70 | 0 | 0 |
| 113 Bait And Tackle | County of Mahnomen | 60 | 0 | 0 |
| St. Joseph's Catholic Church | County of Mahnomen | 60 | 0 | 0 |
| New Horizon Resort And Lodge | County of Mahnomen | 55 | 0 | 0 |
| Mahnomen Country Club | County of Mahnomen | 50 | 0 | 0 |
| Nee-gon-nee Lutheran Church | County of Mahnomen | 50 | 0 | 0 |
| Center Of Human Environment | County of Mahnomen | 37 | 0 | 0 |
| Island Lake Resort | County of Mahnomen | 30 | 0 | 0 |
| Travelers Motel Mahnomen | County of Mahnomen | 28 | 0 | 0 |
| Lone Pine Rentals | County of Mahnomen | 25 | 0 | 0 |
| St Michaels Catholic Sch | County of Mahnomen | 25 | 0 | 0 |
| Bellefeuille Cabins | County of Mahnomen | 25 | 0 | 0 |
| E And E Tavern | County of Mahnomen | 25 | 0 | 0 |
| Center For Human Env | County of Mahnomen | 25 | 0 | 0 |
| Cary | County of Mahnomen | 25 | 0 | 0 |
| Len And Ruths Tavern | County of Mahnomen | 25 | 0 | 0 |
| Broken Arrow Resort | County of Mahnomen | 25 | 0 | 0 |
| Elkhorn Resort & Campground | County of Mahnomen | 25 | 0 | 0 |
| Dunrollin Resort | County of Mahnomen | 25 | 0 | 0 |
| Pike Lake Resort | County of Mahnomen | 25 | 0 | 0 |
| Tall Pines Resort | County of Mahnomen | 25 | 0 | 0 |
| Pinehurst Resort | County of Mahnomen | 25 | 0 | 0 |
| Jolly Fisherman Resort | County of Mahnomen | 25 | 0 | 0 |
| Traveler | County of Mahnomen | 25 | 0 | 0 |
| Tulaby Lake Inn | County of Mahnomen | 25 | 0 | 0 |
| The Sportsman Bar | County of Mahnomen | 25 | 0 | 0 |
| Carys Evergreen Resort | County of Mahnomen | 25 | 0 | 0 |
| Mahnomen Mobile Home Park | County of Mahnomen | 25 | 0 | 0 |
| Travellers Motel Mhp | County of Mahnomen | 25 | 0 | 0 |
| Mahnomen County Airport | County of Mahnomen | 25 | 0 | 0 |
| Island Lake Resort | County of Mahnomen | 25 | 0 | 0 |
| Star Drive In Theatre | County of Mahnomen | 25 | 0 | 0 |
| E-z One Stop | County of Mahnomen | 25 | 0 | 0 |
| Mahnomen County Garage | County of Mahnomen | 25 | 0 | 0 |
| Natahwaush Mws | County of Mahnomen | 25 | 0 | 0 |
| Rice Lake Mws | County of Mahnomen | 25 | 0 | 0 |
| Pine Bend Water Supply | County of Mahnomen | 25 | 0 | 0 |
| Chippewa Ranch Cws | County of Mahnomen | 25 | 0 | 0 |
| Service Station | County of Mahnomen | 25 | 0 | 0 |
| Kruses Hide-a-way Resort | County of Mahnomen | 25 | 0 | 0 |
| Curleys Corner | County of Mahnomen | 25 | 0 | 0 |
| Swiftys Trading Post | County of Mahnomen | 25 | 0 | 0 |
| Flowing Well | County of Mahnomen | 25 | 0 | 0 |
| Pinehurst Campground | County of Mahnomen | 25 | 0 | 0 |
| Wayside Rest, Tulaby Lake Mndot | County of Mahnomen | 25 | 0 | 0 |
| Mahnomen Country Club | County of Mahnomen | 25 | 0 | 0 |
| Walt's Jack And Jill | County of Mahnomen | 25 | 0 | 0 |
| Grief Bros Corporation | County of Mahnomen | 25 | 0 | 0 |
| Lumber Products | County of Mahnomen | 25 | 0 | 0 |
| Beckman Wrecking | County of Mahnomen | 25 | 0 | 0 |
| Trautner | County of Mahnomen | 25 | 0 | 0 |
| Winter Trucking | County of Mahnomen | 25 | 0 | 0 |
| Mahnomen Wholesale Inc | County of Mahnomen | 25 | 0 | 0 |
| Thorsen Corporation | County of Mahnomen | 25 | 0 | 0 |
| Little Elbow Lk St Park | County of Mahnomen | 25 | 0 | 0 |
| Jolly Fisherman Resort | County of Mahnomen | 0 | 0 | 0 |