Huron Valley Group Sierra Club
- Information about the local chapter, including meeting times, events, and links to other organizations and resources.
- http://michigan.sierraclub.org/huron/

Huron River Watershed Council
- Coalition of governments, businesses, and volunteers dedicated to protecting, sustaining, and rehabilitating the Huron River system. Site includes details of events, current programs, membership information, and links.
- http://www.hrwc.org/

Saving Dicken Woods
- Information on efforts to preserve Dicken Woods against development.
- http://www.dickenwoods.org/

Scio Residents for Safe Water
- Advocating against groundwater pollution. Providing news, contact information on government officials, and opportunities to volunteer.
- http://www.hvcn.org/info/srsw/

Michigan Natural Areas Council
- Advisory and educational body, dedicated to the preservation of natural areas of scenic beauty or scientific value. Information on membership, events, and activities.
- http://www.cyberspace.org/~mnac/