- Brower Park – Mecosta County
- Center for Watershed Protection
- Clinton River Watershed Council
- Crystal Lake & Watershed Assoc.
- EPA Index of Watershed Indicators
- EPA Shoreland Protection Resources
- Flint River Watershed Coalition
- Friends of the Jordan River Watershed
- Friends of the Rouge
- Watershed Center – Grand Traverse Bay
- Haymarsh State Game Area – Mecosta County
- Hess Lake Improvement Association – Newaygo Co.
- Higgins Lake Property Owners
- Higgins Lake Watershed Summary
- Houghton Lake Improvement Board
- Houghton Lake Lake Association
- Huron River Watershed Council
- Indian Lakes Association
- Lake James Property Owners
- Lake Mitchell Improvement Board
- Little River Band of Ottawa Indians
- Muskegon County Nature Club
- Muskegon Environmental Research & Education Society (MERES)
- Muskegon Lake Nature Preserve
- Muskegon Lake Watershed Partnership
- Muskegon River Watershed Project
- Paris Park – Mecosta County
- Rouge River
- Saginaw Bay Watershed Initiative Network
- Save our Shoreline (SOS)
- (Friends of the) St. Joe River Association, Inc.
- St. Joseph River Watershed Initiative
- School Section Lake – Mecosta County
- Surf Your Watershed
- Tip of the Mitt Watershed Council
- Tri-Lakes Association – Mecosta County
- White River Watershed Partnership
