Iowa DNR

Water Quality Assessments

Impaired Waters List

Data Sources

To assess waterbody health in Iowa, data from many different sources is compiled and processed. This data is often available to the public as well.

The State of Iowa also provides several Geographic Information System (GIS) services:

Data for surrounding states and the rest of the nation is available through the US Environmental Protection Agency (EPA):

This page was created 9/5/2019 9:29:47 AM and was last updated 10/5/2020 10:49:06 AM