| Business | Phone |
| Granit Municipalite 5090 Rue Frontenac, Lac-Megantic G6B 1H3 | (819) 583-0181 |
| Lac Megantic Garage Municipal 4422 Papineau, Lac-Megantic | (819) 583-2443 |
| Lac Megantic Usine D'Epuration 6594 Wolfe, Lac-Megantic | (819) 583-2466 |
| Lac Megantic Police Dept 3567 Boul Stearns, Lac-Megantic G6B 2G8 | (819) 583-1234 |
| Lac-Megantic Ancien Garage 5029 Rue Frontenac, Lac-Megantic G6B 1H2 | (819) 583-4705 |
| Lac Megantic Poste De Pompage 3823 Rue De La Baie-Des-Sables, Lac-Megantic G6B 1R5 | (819) 583-2318 |
| Lac-Megantic Bureau Generale 5527 Rue Frontenac, Lac-Megantic G6B 1H6 | (819) 583-2441 |
| Lac Megantic O T J 3293 Rue Victoria, Lac-Megantic G6B 1R8 | (819) 583-3761 |
| Lac Megantic Camping-Base Pln 2588 Ch Baie Des Sables, Lac-Megantic G6B 2S5 | (819) 583-3965 |
| Lac Megantic Svc Loisirs 5561 Rue Frontenac, Lac-Megantic G6B 1H6 | (819) 583-0630 |
| Site D'Enfouissement Sanitaire 5138 Rue Pie-Xi, Lac-Megantic G6B 2S3 | (819) 583-5188 |