| Alectra | Vaughan |
| Barrie. Municipal Office, Barrie - 70 Collier St, Finance Department | Barrie |
| Bird Fuels | Collingwood |
| Collingwood. Municipal Office, Collingwood - Stewart Rd, Collingwood Public Utilities - Water Department | Collingwood |
| EPCOR Electricity Distribution Ontario | Collingwood |
| ERTH Power Corporation, ERTH Power | Ingersoll |
| Festival Hydro Inc. | Stratford |
| Hydro One | Toronto |
| Lakefront Utility Services Inc | Cobourg |
| NT Power, Midland | Midland |
| Peterborough Utilities Group | Peterborough |
| Wasaga Distribution | Wasaga Beach |
| Westario Power | Brockton |