We found 65 public water systems that could serve the same population as Fort St Regis Frosty Drive-in (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Quartz Flat Rest Stop West | Superior | 3,302 | 0 | 10 |
| Quartz Flat Rest Stop East | Superior | 3,300 | 0 | 13 |
| Dena Mora Saltese East Rest | Saltese | 3,000 | 0 | 20 |
| Dena Mora Saltese West Rest | Saltese | 2,000 | 0 | 14 |
| Superior Town Of | Superior | 887 | 0 | 8 |
| St Regis Truck Stop Cafe | County of Mineral | 600 | 0 | 0 |
| Lincolns Silver Dollar Bar | Haugan | 520 | 0 | 7 |
| Alberton Town Of | Alberton | 495 | 0 | 8 |
| St Regis Travel Center | St Regis | 274 | 0 | 13 |
| Travelers Inn Bar | St Regis | 204 | 0 | 10 |
| Talking Bird Saloon | St Regis | 204 | 0 | 8 |
| Silver Express | Haugan | 203 | 0 | 7 |
| St Regis Complex | County of Mineral | 200 | 0 | 0 |
| St Regis School Old Bldg | St Regis | 176 | 0 | 65 |
| Campground St Regis | St Regis | 155 | 0 | 7 |
| Rosie's Cafe | County of Mineral | 150 | 0 | 0 |
| St Regis Frosty | County of Mineral | 150 | 0 | 0 |
| Lozeau Stagecoach Inn | Superior | 150 | 0 | 0 |
| Lds Church Superior | Superior | 110 | 0 | 0 |
| St Regis Super 8 Motel | St Regis | 105 | 0 | 0 |
| Montana Bar & Bbq | Saltese | 104 | 0 | 0 |
| River Edge Resort 2 | Alberton | 104 | 0 | 0 |
| Ok Cafe And Casino | St Regis | 104 | 0 | 0 |
| The Nugget Rv Park | St Regis | 102 | 0 | 0 |
| Ken Mar Water System | County of Mineral | 100 | 0 | 0 |
| Daw Forest Products Planer | County of Mineral | 100 | 0 | 0 |
| St Regis Camp Motel And Frosty | St Regis | 94 | 0 | 0 |
| St Regis Community Park | St Regis | 90 | 0 | 0 |
| Trestle Creek I And Ii | St Regis | 85 | 0 | 0 |
| O Aces | Deborgia | 79 | 0 | 0 |
| High Country Park | Paradise | 76 | 0 | 0 |
| Stephens Office Complex | St Regis | 60 | 0 | 0 |
| Casa Gusto Pizza House | County of Mineral | 60 | 0 | 0 |
| Billy Bigriggers Unapproved | Deborgia | 58 | 0 | 0 |
| Old Mill Peninsula Hoa | St Regis | 58 | 0 | 0 |
| Whispering Pines Tr Ct | St Regis | 55 | 0 | 0 |
| Silver Dollar Inn Haugan | Haugan | 55 | 0 | 0 |
| Tarkio Corner Bar | County of Mineral | 50 | 0 | 0 |
| Stangs Food City | County of Mineral | 50 | 0 | 0 |
| Quartz Flat Campground | Superior | 50 | 0 | 0 |
| Montana West Inc | County of Mineral | 50 | 0 | 0 |
| Stagecoach Trailer Park | County of Mineral | 50 | 0 | 0 |
| Whispering Pines | County of Mineral | 50 | 0 | 0 |
| Cougar Meadows | St Regis | 45 | 0 | 0 |
| Jack Lincoln Memorial Clinic | County of Mineral | 45 | 0 | 0 |
| Crown Pacific Inland Maintshop | County of Mineral | 40 | 0 | 0 |
| River Edge Resort 1 | Alberton | 39 | 0 | 0 |
| St Regis Work Center | St Regis | 33 | 0 | 0 |
| West Mountain Estates | Alberton | 30 | 0 | 0 |
| Sloway Campground | Superior | 27 | 0 | 0 |
| Oliverville | County of Mineral | 25 | 0 | 0 |
| Alberton Eastbound Rest Stop | County of Mineral | 25 | 0 | 0 |
| Lookout Pass Cafe | County of Mineral | 25 | 0 | 0 |
| Riveredge Motel, Trlr Ct & Cg | County of Mineral | 25 | 0 | 0 |
| Little River Motel | County of Mineral | 25 | 0 | 0 |
| Atom Haven Cafe | County of Mineral | 25 | 0 | 0 |
| Sportsmans Bar & Cafe | County of Mineral | 25 | 0 | 0 |
| Stag Bar | County of Mineral | 25 | 0 | 0 |
| Alberton Westbound Rest Stop | County of Mineral | 25 | 0 | 0 |
| West End Trailer Court | County of Mineral | 25 | 0 | 0 |
| Snowline Natural | Haugan | 25 | 0 | 0 |
| Mangolds General Store And Motel | Saltese | 25 | 0 | 0 |
| Deer Lick Park Water And Sewer District | Haugan | 20 | 0 | 0 |
| Saltese School | County of Mineral | 5 | 0 | 0 |
| Isu Foundation Camp | Alberton | 0 | 0 | 0 |