Iowa DNR
ADBNet

Water Quality Assessments

Impaired Waters List

Segment Summary

The Iowa DNR Water Monitoring and Assessment Section assesses waterbodies in units called segments. A segment is a portion of a river or stream, or a lake, wetland, or reservoir, where one can consider the water to be of the same quality throughout that segment.

Segment Types 2591 total segments
Number of Segments with Each Designated Use Class