| Androscoggin Land Trust | androscogginlandtrust.org |
| Appalachian Trail Conservancy | appalachiantrail.org |
| The Archaeological Conservancy | archaeologicalconservancy.org |
| National Audubon Society | audubon.org |
| Bangor Land Trust | bangorlandtrust.org |
| Bangor Water District | bangorwater.org |
| Boothbay Region Land Trust | bbrlt.org |
| Boothbay Region Water District | bbrwd.org |
| Cape Elizabeth Land Trust | capelandtrust.org |
| Chewonki Foundation | chewonki.org |
| Clifton Climbers Alliance | cliftonclimbersalliance.org |
| Downeast Lakes Land Trust | downeastlakes.org |
| Falmouth Land Trust | falmouthlandtrust.org |
| Foothills Land Conservancy | foothillsland.org |
| Friends of Nature | friends-of-nature.ca |
| Forest Society of Maine | fsmaine.org |
| US Fish and Wildlife Service | fws.gov |
| Gardiner Water District | gardinerwaterdistrict.com |
| Greater Lovell Land Trust | gllt.org |
| Islesboro Islands Trust | islesboroislandstrust.org |
| Kennebec Estuary Land Trust | kennebecestuary.org |
| Kittery Water District | kitterywater.org |
| Loon Echo Land Trust | loonecholandtrust.org |
| Mahoosuc Land Trust | mahoosuc.org |
| Mahoosuc Pathways | mahoosucpathways.org |
| University of Maine System | maine.edu |
| Maine Farmland Trust | mainefarmlandtrust.org |
| Maine Woodland Owners | mainewoodlandowners.org |
| Maine Appalachian Trail Land Trust | matlt.org |
| Maine Coast Heritage Trust | mcht.org |
| Midcoast Conservancy | midcoastconservancy.org |
| The Nature Conservancy | nature.org |
| Northeast Wilderness Trust | newildernesstrust.org |
| Open Space Institute | openspaceinstitute.org |
| Appalachian Mountain Club | outdoors.org |
| Phippsburg Land Trust | phippsburglandtrust.org |
| Prouts Neck Association | proutsneck.org |
| Portland Water District | pwd.org |
| Royal River Conservation Trust | rrct.org |
| South Berwick Water District | sbwd.org |
| Stanton Bird Club | stantonbirdclub.org |
| Kennebec Land Trust | tklt.org |
| Portland Trails | trails.org |
| US Coast Guard | uscg.mil |
| Vinalhaven Land Trust | vinalhavenlandtrust.org |
| Town of Yarmouth | yarmouth.ma.us |