Massachusetts Fire District 7 Mutual Aid Association, Inc.
District 7 Radio Frequencies
| Auburn | 154.3850 | Auburn Fire District - Operations |
| Blackstone | 159.3300 | Blackstone Fire District- Main Frequency |
| Brookfield | 154.7325 | Brookfield Fire District |
Charlton | 155.8350 | Charlton Fire District |
| Douglas | 33.96 | Douglas Fire Department |
| Dudley | 154.3400 | Dudley Fire District- Operations |
| East Brookfield | 155.5275 | East Brookfield Fire District |
| Grafton | 482.9875 | Grafton Fire District |
| Leicester | 158.7750 | Leicester Fire District |
| Mendon | 33.94 | Mendon Fire District |
| Millbury | 153.9350 | Millbury Fire District |
| Millville | 153.9500 | Millville Fire District |
| Northbridge | 33.68 | Northbridge Fire District - Operations |
| North Brookfield | 155.0925 | North Brookfield Fire District |
| Oxford | 154.0325 | Oxford Fire District- New EMS/Fire |
| Southbridge | 154.3100 | Southbridge Fire District |
| Spencer | 154.0625 | Spencer Fire District- Operations |
| Sturbridge | 151.1150 | Sturbridge Fire District |
| Sutton | 154.8675 | Sutton Fire District |
| Upton | 153.9050 | Upton Fire District |
| Uxbridge | 155.8050 | Uxbridge Fire District- F-1 |
| Warren | 154.1300 | Warren Fire District- Operations |
| Webster | 153.8600 | Webster Fire District - Share with DPW |
| West Brookfield | 155.8125 | West Brookfield Fire District |
| Worcester | 800Mhz Trunked System | Worcester Fire Department |