Department of Natural Resources: https://www.iowadnr.gov/
IOWATER: https://www.iowadnr.gov/Environmental-Protection/Water-Quality/Water-Monitoring/Volunteer-Water-Monitoring
Iowa River Revival: https://www.iowarivers.org/
Skunk River Paddlers: https://skunkriverpaddlers.org/index.html
American Canoe Association: https://americancanoe.org/
Iowa Whitewater Coalition: https://www.iowawhitewater.org/
Iowa Environmental Council: https://www.iaenvironment.org/
Iowa River Clean up: http://www.iarvcp.org/
Iowa Water Trails: http://iowawatertrails.org/
Iowa Project A.W.A.R.E.: https://www.iowaprojectaware.org/
Iowa Alliance for Responsible Agriculture: https://iowaresponsibleagriculture.org/
Johnson County Farmers and Neighbors: https://www.jfaniowa.org/
Chris Jones, Research Engineer at Iowa Institute of Hydraulic Research-Hydroscience and Engineering at the University of Iowa: https://cjones.iihr.uiowa.edu/
Crawdaddy Outdoors: https://www.crawdaddyoutdoors.com/
Central Iowa Paddlers: http://centraliowapaddlers.org/
Upper Iowa River Alliance: https://upperiowariver.org/
Tim Hammond, Interim Lecturer/Director of Outdoor Recreation, Grinnell College, hammondt@grinnell.edu