These are all the organizations involved in the Environmental Portal. These links take you directly to their website.

Adopt a Stream Foundation
Audubon Washington
Bats Northwest
Bicycle Alliance of Washington
Bike Works
Burke Museum of Natural History and Culture
Camp Long Environmental Learning Center
Carkeek Park
Carkeek Park Orchard
Cascade Bicycle Club
Cascade Land Conservancy
Colman Park Reforestation Project
Community Coalition for Environmental Justice
Conscious Choice
Cultivating Youth
Discovery Park
Duwamish River Cleanup Coalition
Earth Ministry
EarthCorps
Environmental Coalition of South Seattle (ECOSS)
Environmental PORTAL
Environmental Protection Agency
Fremont Arts Council
Friends of South Portage Bay Reclamation/Montlake Waterfront Park
Friends of the Cedar River Watershed
Friends of the Trail
FutureWise
Georgetown Riverview Restoration Project
Global Visionaries
Greenwood Park
GreenWorks Realty
Grist Magazine
Groundswell NW
Habitat for Humanity & Let Kids be Kids Inc.
Hazel Wolf Environmental Film Network
Heifer International
Heron Habitat Helpers
Homewaters Project
IslandWood
King Conservation District
King County Adopt-a-Road
King County Department of Natural Resources
Klondike Gold Rush National Historical Park
Let Kids be Kids Inc.
Lettuce Link - Solid Ground
Little Bit Therapeutic Riding Center
Longfellow Creek Watershed
Mountains to Sound Greenway
National Wildlife Federation
Nature Conservancy
Nature Consortium
NatureMapping
Neighborhood Farmers Market Alliance
NOAA/Northwest Fisheries Science Center
Nooksack Salmon Enhancement Association
Northwest Ecobuilding Guild
Northwest Environmental Education Council
Northwest Environmental Training Center
Northwest Outdoor Exposure
Northwest Sustainable Energy for Economic Development
Olympic Park Institute
ONE/Northwest
P-Patch
P-Patch Program
Pacific Education Institute
Pacific Marine Research
Pacific Science Center
Pacific Science Center - Mercer Slough
Partnership for Water Conservation
Passages Northwest
PAWS
PCC Natural Markets
People for Puget Sound
Resource Venture
ReUseResources
Rite of Passage Journeys
Salmon People
Seattle Aquarium
Seattle Aquarium Volunteer Beach Naturalists
Seattle Art Museum
Seattle Audubon
Seattle Parks & Recreation - Clean & Green Seattle Initiative
Seattle Parks and Recreation (Service Learning Program)
Seattle Parks Foundation
Seattle Tilth
Seattle Youth Garden Works
Seward Park
Seward Park Environmental & Audubon Center
Sierra Club - Cascade Chapter
Sightline Institute
Solar Washington
Sound Experience
Step It Up Seattle
Student Conservation Association
Sustainable Ballard
Sustainable Seattle
Terra Forma
University of Washington - Program on the Environment
University of Washington Botanic Gardens
Urban Wilderness Project
Volunteers for Outdoor Washington (VOW)
Warren G. Magnuson Park Community Center
Washington Water Trails Association
Washington Conservation Corps
Washington Conservation Voters
Washington Environmental Council
Washington Foundation For the Environment
Washington Native Plant Society
Washington State University - King County Extension: 4-H
Washington State University King County Extension
Washington Trails Association
Washington Water Trails Association
Washington Wilderness Coalition
Washington Wildlife & Recreation Coalition
Wilderness Awareness School
Woodland Park Zoo - Zoo Corps
YMCA Earth Service Corps
Zoo Corps