| Acton Horticultural Society | Acton |
| Aldershot Village Business Improvement Area | Burlington |
| Association of Oakville Harbours Stakeholders | Oakville |
| Bronte Business Improvement Area | Oakville |
| Bronte Horticultural Society | Oakville |
| Bruce Trail Conservancy, Halton Hills Chapter, Toronto Bruce Trail Club | Halton Hills |
| Bruce Trail Conservancy, Iroquoia Bruce Trail Club | Burlington |
| Burlington Downtown Business Association | Burlington |
| Burlington Horticultural Society | Burlington |
| Burlington. By-law Compliance, By-Law Enforcement | Burlington |
| Burlington. Recreation, Community and Culture, Downtown Waterfront | Burlington |
| Canada. Natural Resources Canada, Office of Energy Efficiency | Ottawa |
| CLEAResult Canada, Central East, Enbridge Home Winterproofing and IESO Energy Affordability Programs | Toronto |
| Conservation Halton, Green Space: Newcomer Youth Climate Forum | Burlington |
| Conservation Halton, Public Education/Outreach Programs | Burlington |
| Conservation Halton, Burlington - Mount Nemo Conservation Area, Conservation Land & Recreational Trails | Burlington |
| Conservation Halton, Campbellville - Mountsberg Conservation Area, Conservation Land & Recreational Trails | Milton |
| Conservation Halton, Milton - Area 8 Conservation Area, Conservation Land & Recreational Trails | Milton |
| Conservation Halton, Milton - Crawford Lake Conservation Area, Conservation Land & Recreational Trails | Milton |
| Conservation Halton, Milton - Hilton Falls Conservation Area, Conservation Land & Recreational Trails | Milton |
| Conservation Halton, Milton - Kelso Conservation Area / Glen Eden, Conservation Land & Recreational Trails | Milton |
| Conservation Halton, Milton - Rattlesnake Point Conservation Area, Conservation Land & Recreational Trails | Milton |
| Conservation Halton, Milton - Robert Edmondson Conservation Area, Conservation Land & Recreational Trails | Milton |
| Credit Valley Conservation Authority, Limehouse Conservation Area, Conservation Land & Recreational Trails | Halton Hills |
| Credit Valley Conservation Authority, Silver Creek Conservation Area, Conservation Land & Recreational Trails | Halton Hills |
| Downtown Acton Business Improvement Area | Acton |
| Downtown Milton Business Improvement Area | Milton |
| Downtown Oakville Business Improvement Area | Oakville |
| Field and Stream Rescue Team | Burlington |
| Freshwater Conservation Canada - Greg Clark Chapter, Environmental Improvement Group | Halton Region |
| Friends of the Earth Canada | Ottawa |
| Georgetown Central Business Improvement Area, Downtown Georgetown Business Improvement Area | Georgetown |
| Georgetown Horticultural Society | Georgetown |
| Halton Bluebird Club | Oakville |
| Halton Hills. Town Council, Clerks Division Services | Halton Hills |
| Halton North Peel Naturalist Club | Georgetown |
| Halton. Halton Region Public Health, Environmental Health | Oakville |
| Halton. Public Works, Water & Environment | Oakville |
| Kerr Village Business Improvement Area | Oakville |
| Milton & District Horticultural Society | Milton |
| Milton. Town Clerk's Division, By-law Enforcement | Milton |
| Niagara Escarpment Commission | Georgetown |
| Oakville Horticultural Society | Oakville |
| Oakville. Municipal Enforcement Services, By-law Services | Oakville |
| Oakville. Parks and Open Space, Lions Valley Park | Oakville |
| Oakville. Parks and Open Space, Greenhouse/Conservatory Facilities & Programs | Oakville |
| Oakvillegreen Conservation Association, Treeplanting | Oakville |
| Ontario Automotive Recyclers Association, Car Heaven | |
| Ontario Farmland Trust | Guelph |
| Ontario. Ministry of Environment, Conservation and Parks, Peterborough - Mailing Address, Natural Resources Information and Support Centre | Peterborough |
| Ontario. Ministry of the Environment, Conservation and Parks, Halton-Peel MECP District | Burlington |
| Ontario. Ministry of the Environment, Conservation and Parks, Spills Action Centre | Toronto |
| Prime Earth, Youth Empowerment & Environmental Conservation Organization | Burlington |
| Protecting Escarpment Rural Land | Burlington |
| South Peel Naturalists' Club | Mississauga |
| The Friends of the Old Seed House Garden, Showcase Garden | Georgetown |
| Trans Canada Trail, National Office | Montréal |
