- 350 Madison
- 350.org: an International Movement Focused on Global Warming
- 1000 Friends of Wisconsin
- Adili Institute
- Aldo Leopold Nature Center
- Alliance for the Great Lakes
- Audubon Society
- Clean Wisconsin
- Earth911
- The Ecologist
- Environmental Protection Agency
- EWG.org
- File 13
- Freecycle
- Frugally Sustainable
- Great Lakes Water Wars
- Insteading: Homesteading-Sustainabiity
- Mindful Momma
- National Tapwater Quality Database
- Natural Resources Foundation of Wisconsin
- Nature Conservancy
- Planet Ark
- Prairie Enthusiasts
- RealClimate
- Recycle Now
- RecycleNation
- Recycling 101
- River Alliance of Wisconsin
- Save Our Environment
- Sierra Club: John Muir Chapter
- Story of Stuff
- Treehugger
- Urban Ecology Center
- Wisconsin BIcycle Federation
- Wisconsin Conservation Voters
- Wisconsin Environment: a Statewide Citizen-based Environmental Organization
- Wisconsin Landmark Conservancy
- Wisconsin Wetlands Association
