| St. Clair County | St. Clair County | 42.95307 | -82.64351 | 30 |
| St. Clair County | Bluewater Area Transportation Commission | 42.95307 | -82.64351 | 30 |
| EMS Agencies and Hospitals | Tri-Hospital EMS | 42.95307 | -82.64351 | 30 |
| EMS Agencies and Hospitals | Ascension River District Hospital | 42.785 | -82.481 | 0.19 |
| EMS Agencies and Hospitals | Lake Huron Medical Center | 42.95307 | -82.64351 | 30 |
| EMS Agencies and Hospitals | McLaren-Port Huron Hospital | 42.95307 | -82.64351 | 30 |
| Municipalities and Districts | Capac | 42.95307 | -82.64351 | 30 |
| Municipalities and Districts | Clay Township | 42.95307 | -82.64351 | 30 |
| Municipalities and Districts | Marysville | 42.95307 | -82.64351 | 30 |
| Municipalities and Districts | Port Huron (City) | 42.95307 | -82.64351 | 30 |
| Schools | Algonac Community Schools | 42.95307 | -82.64351 | 30 |
| Schools | Capac Community Schools | 42.95307 | -82.64351 | 30 |
| Schools | East China School District | 42.76281 | -82.48908 | 5 |
| Schools | Marysville School District | 42.95307 | -82.64351 | 30 |
| Schools | New Baltimore Schools | 42.68114 | -82.73686 | 3 |
| Schools | Port Huron Area School District | 42.95307 | -82.64351 | 30 |
| Schools | St. Clair County Regional Educational Service Agency (RESA) | 42.95307 | -82.64351 | 30 |
| Schools | Yale Public Schools | 42.95307 | -82.64351 | 30 |
| Amateur Radio | ARES/RACES/SkyWarn | 42.95307 | -82.64351 | 30 |
| Amateur Radio | 2-Meter | 42.95307 | -82.64351 | 30 |
| Amateur Radio | 70-CM | 42.95307 | -82.64351 | 30 |
