Upper Mississippi Basin Stakeholder Network
- Focused on identifying soil and water conservation concerns, connecting people and organizations, facilitating discussion and change. Includes a newsletter, membership information, and resources of interest to Illinois, Iowa, Minnesota, Missouri, and Wisc
- http://www.umbsn.org/

Midwest Hazecam
- Real-time air pollution visibility camera network for a number of cities in Illinois, Indiana, Minnesota, Missouri, Ohio and Wisconsin.
- http://www.mwhazecam.net/

Natural Connections
- Database and maps of the green infrastructure in Illinois, Indiana and Wisconsin, from the Center for Neighborhood Technology and Openlands Project.
- http://www.greenmapping.org/

Natural Land Institute
- Protecting and managing lands in Illinois and Wisconsin. Includes news, major acquisitions, volunteer opportunities, and membership information.
- http://www.naturalland.org/

Illinois-Indiana Sea Grant College Program
- Conducts research, education, and public outreach related to water resources in the Great Lakes region. Cooperatively administered by the University of Illinois and Purdue University.
- http://www.iisgcp.org/

Upper Mississippi River National Wildlife and Fish Refuge
- The Upper Mississippi NWR encompasses approximately 194,000 acres in parts of Minnesota, Wisconsin, Iowa, and Illinois. Includes information on refuges within its complex, including Trempealeau National Wildlife Refuge.
- http://midwest.fws.gov/uppermississippiriver/

Midwest Regional Planning Organization
- Facilitates regional planning to address the U.S. EPA regional haze regulations (adopted in 1999) in the five states of Illinois, Indiana, Michigan, Ohio, and Wisconsin.
- http://www.ladco.org/

Friends of the Upper Mississippi Refuges
- Independent, non-profit organization focused on conserving the natural and cultural resources of the Upper Mississippi River National Wildlife and Fish Refuge, the Trempealeau National Wildlife Refuge and the Driftless Area National Wildlife Refuge.
- http://www.friendsofuppermiss.org/

TPE - The Prairie Enthusiasts
- Dedicated to the inventory, promotion, restoration, and protection of natural prairies in the Upper Midwest. Includes conference information, discussion area, news articles, and information about prairie flora and fauna.
- http://www.theprairieenthusiasts.org/

US Army Corps of Engineers, Rock Island District
- Features information on this regional district's activities, environmental and recreational resources and issues, along with resources on navigation, flood protection, emergency response, land management, and engineering services.
- http://www.mvr.usace.army.mil/

U.S. Fish & Wildlife Service: Great Lakes-Big Rivers Region 3
- Principal federal agency responsible for conserving, protecting and enhancing fish, wildlife and plants and their habitat. Information on regional responsibilities, business opportunities, employment, assessments and contacts.
- http://midwest.fws.gov/

The Prairie Club
- Non-profit conservationist organization dedicated to outdoor recreation and love of nature. Office based in Elmhurst, Illinois with member facilities in Spring Grove, Illinois and Hazelhurst, Michigan and a library archive in Chesterton, Indiana.
- http://www.prairieclub.org/

Environmental Law & Policy Center
- A public interest environmental advocacy organization; features include publications, membership information, mailing list and funding resources.
- http://www.elpc.org/

2001 Upper Mississippi River Flood
- Photos of the 2001 flood at cities in Minnesota, Iowa, Illinois and Wisconsin.
- http://www.draves.com/2001flood/

Repowering the Midwest
- Clean energy development plan for the US heartland (Illinois, Indiana, Iowa, Michigan, Minnesota, Nebraska, North Dakota, Ohio, South Dakota, and Wisconsin) from the Environmental Law and Policy Center.
- http://www.repowermidwest.org/

Ground Water Atlas of the United States: Illinois, Indiana, Kentucky, Ohio, Tennessee
- Online USGS report describes the groundwater resources of this 5-state region.
- http://capp.water.usgs.gov/gwa/ch_k/index.html

Ground Water Atlas of the United States: Minnesota, Iowa, Wisconsin, and Michigan
- Online USGS report describes the groundwater resources of this 4-state region.
- http://capp.water.usgs.gov/gwa/ch_j/index.html

Upper Midwest Environmental Sciences Center
- U.S. Geological Survey research programs addressing a wide range of topics, including Great Lakes ecosystems, invasive species, mercury in the environment, and ecosystem monitoring for the Upper Mississippi River system.
- http://www.umesc.usgs.gov/