| Ausable Bayfield Conservation Authority, Day Camps, Exeter | South Huron |
| Bluewater District School Board, Wiarton, Bluewater Outdoor Education Centre | South Bruce Peninsula |
| Georgian Bay Mnidoo Gamii Biosphere, Georgian Bay Biosphere Reserve | Parry Sound |
| Georgian Bay Turtle Hospital | Oro-Medonte |
| Hidden Acres Mennonite Camp and Retreat Centre | New Hamburg |
| Lake Huron Coastal Centre, No Physical Address | Goderich |
| Lake Simcoe Region Conservation Authority [Central East], Bradford West Gwillimbury, Scanlon Creek Conservation Area | Bradford West Gwillimbury |
| Lake Simcoe Region Conservation Authority [Central East], Bradford West Gwillimbury, Scanlon Creek Nature Centre - Outdoor Environmental Education Program | Bradford West Gwillimbury |
| Nottawasaga Valley Conservation Authority, Tiffin Centre for Conservation | Utopia |
| Ontario Nature, Toronto | Toronto |
| Sydenham Conservation Foundation | |
| Upper Thames River Conservation Authority, St. Marys, Wildwood Conservation Area | St Marys |