- Aster Rosa Ecology
- Amigo Gutters
- Cedar Grove
- City Soil Farm
- Dubsea Coffee
- Duwamish Alive Coalition
- Duwamish Longhouse and Cultural Center
- Duwamish River Clean-up Coalition
- DVYC: Duwamish Valley Youth Corps
- Earth Corps
- ECOSS: Environmental Coalition of South Seattle
- Equinox Studios
- Forterra
- Green River Coalition
- GSP: Green Seattle Partnership
- Hamm Creek
- Ingraham High School: Bridges Program
- Just Health Action
- King County Conservation District
- King County Department of Natural Resources and Parks
- King County Healthy Lands Project
- King County Noxious Weed Board
- King County Water Treatment Division
- Metis Construction
- Mid Sound Fisheries
- Mini Mart City Park
- The Nature Conservancy
- Nicoterra Trails
- People for Puget Sound
- Pierce Conservation District
- Port of Seattle
- Puget Soundkeeper Alliance
- RainWise
- RBAC: Rainier Beach Action Coalition
- ReGreen the Green
- Sea Mar Renacer Youth Treatment Center
- Seattle Department of Transportation
- Seattle Parks and Recreation
- Seattle Parks Foundation
- Seattle Sounders FC
- Seattle Works
- Starbucks Coffee
- Stewardship Partners
- Sustainable Seattle
- Thornton Creek Alliance
- Tilth Alliance
- Tukwila Parks and Recreation
- United Way
- Urban Systems Design
- Washington Department of Fish and Wildlife