| CBEAC - Civic Beautification and Environmental Awareness Committee, No Physical Address | Stratford |
| CLEAResult Canada, Central East, Enbridge Home Winterproofing and IESO Energy Affordability Programs | Toronto |
| Ducks Unlimited Canada, Barrie | Barrie |
| Heinbuch Wildlife Control, No Physical Address | Perth East |
| Huron Perth Public Health, Clinton - London Rd, Safe Beach Water | Central Huron |
| Huron Perth Public Health, Clinton - London Rd, Safe Drinking Water | Central Huron |
| Maitland Valley Conservation Authority, Wroxeter | Howick |
| Maitland Valley Conservation Authority, Wroxeter, Middle Maitland Rejuvenation Committee | Howick |
| Ontario Nature | Toronto Downtown |
| Ontario Woodlot Association, Huron Perth Chapter | Stratford |
| Ontario. Ministry of Environment, Conservation and Parks, Peterborough - Mailing Address, Natural Resources Information and Support Centre | Peterborough |
| General Topics and Information - Central East, Reporting Sick, Orphaned or Injured Wild Animals | |
| Sawyer Preservation Woodlot Association | West Perth |
| Stratford & District Horticultural Society, GardenStratford | Stratford |
| Stratford Field Naturalists, Mailing Address | Stratford |
| Upper Avon River Conservation Club | Perth East |
| West Perth. Municipal Office, West Perth Thames Nature Trail and Wetlands | West Perth |