Iowa DNR

Water Quality Assessments

Impaired Waters List

ADBNet Documentation

303(d) List of Impaired Waters

The 303(d) listing is composed of those lakes, wetlands, streams, rivers, and portions of rivers that do not meet all state water quality standards. These are considered "impaired waterbodies" and states are required to calculate total maximum daily loads (TMDLs) for pollutants causing impairments.

This page was created 11/4/2021 9:55:34 AM