| Canadian Nuclear Laboratories, Property Value Protection Program, Port Hope Area Initiative | Port Hope (Municipality of) |
| Critter Cop | Collingwood |
| General Topics and Information - Central East, Handling Bed Bug Calls | |
| Grey Bruce Public Health | Owen Sound |
| Grey Bruce Public Health, Report A Drug Overdose, No physical location | Owen Sound |
| Grey County., Grey County Housing - Sustainable Housing Benefit, Owen Sound - 9th Ave E | Owen Sound |
| Haliburton, Kawartha, Pine Ridge District Health Unit, Environmental Health Program, Port Hope | Port Hope (Municipality of) |
| Heinbuch Wildlife Control, No Physical Address | Perth East |
| Huron Perth Public Health, Clinton - London Rd, Food Safety | Central Huron |
| Huron Perth Public Health, Clinton - London Rd, Huron Perth Public Health - Clinton Office | Central Huron |
| Huron Perth Public Health, Stratford - West Gore St., Huron Perth Public Health - Stratford Office | Stratford |
| Northern Air Quality Services | Barrie |
| Ontario. Ministry of Environment, Conservation and Parks, Barrie Office | Barrie |
| Ontario. Ministry of the Environment, Conservation and Parks, Spills Action Centre | Toronto |
| Peterborough Public Health, Peterborough - King St, Food Safety | Peterborough |
| Peterborough Public Health, Peterborough - King St, Health Hazard Prevention and Management | Peterborough |
| Peterborough Public Health, Peterborough - King St, Infectious Diseases | Peterborough |
| Rama Health Centre, Rama - Yellowhead Trail | Chippewas of Rama First Nation |
| Ramara Township, Infrastructure, Brechin - 2297 Hwy 12 | Ramara |
| Simcoe Muskoka District Health Unit, Barrie Head Office - 15 Sperling Dr, Environmental Health Department | Barrie |
| Simcoe Muskoka District Health Unit, Collingwood Branch - 280 Pretty River Pkwy, Environmental Health Department | Collingwood |
| Simcoe Muskoka District Health Unit, Cookstown Branch - 25 King St S, Environmental Health Department | Innisfil |
| Simcoe Muskoka District Health Unit, Gravenhurst Branch - 5 Pineridge Gate, Environmental Health Department | Gravenhurst |
| Simcoe Muskoka District Health Unit, Huntsville Branch - 34 Chaffey St, Environmental Health Department | Huntsville |
| Simcoe Muskoka District Health Unit, Midland Branch - Hugel Ave, Environmental Health Department | Midland |
| Simcoe Muskoka District Health Unit, Orillia Branch - 169 Front St S, Environmental Health Department | Orillia |
| Wellington-Dufferin-Guelph Public Health, Orangeville, Public Health | Orangeville |
| Wellington-Dufferin-Guelph Public Health, Shelburne, Public Health | Shelburne |