Iowa DNR
River & Stream Biological Monitoring
Fish and Benthic Macroinvertebrate Surveys
Physical Habitat Assessments
BioNet is the portal for sampling data and summary information collected using the protocols of the Stream Biological Monitoring and Assessment Program.

Biological assessment data can be found by selecting a site in the "Find a Site" section. You may also learn more about biological assessments, view the BioNet user guide and supporting documentation, or view various summary statistics and information about the program in the "Explore BioNet" section.

Find a Site

Stream Name
Site ID

If you know the Site ID number, enter it here. Landowners who received a letter from us can use the Site ID provided in the letter.

Map View

View a statewide map of biological assessment sites. Zoom in on areas of interest.