- City of Barrie
- City of Mississauga
- City of North Bay
- City of Orillia
- City of Vaughan
- Collingwood Utility Services Corp.
- County of Grey
- County of Simcoe
- County of Victoria
- District Municipality of Muskoka
- Gore Bay-Manitoulin Airport
- Grey Sauble Conservation Authority
- Local Services Board of Thorne
- Municipality of Greenstone
- Municipality of Highlands East
- Municipality of Magnetawan
- Municipality of McDougall
- Nottawasaga Valley
Conservation Authority
- Simcoe County Board of Education
- Simcoe County Roman Catholic Secondary School Board
- South Lake Simcoe Region
Conservation Authority
- Town of Aurora
- Town of Bracebridge
- Town of Bradford West Gwillimbury
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- Town of Collingwood
- Town of Innisfil
- Town of Kapuskasing
- Town of Meaford
- Town of Midland
- Town of New Tecumseth
- Town of Newmarket
- Town of Richmond Hill
- Town of The Blue Mountains
- Township of Artemesia
- Township of Clearview
- Township of Euphrasia
- Township of Georgian Bay
- Township of Lake of Bays
- Township of Muskoka Lakes
- Township of Oro-Medonte
- Township of Ramara
- Township of Severn
- Township of Springwater
- Township of St. Vincent
- Township of Tay
- Township of Tiny
- Township of Vespra
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