Iowa DNR

Water Quality Assessments

Impaired Waters List


The ADBNet Reference Codex contains documentation and helpful descriptions of various aspects of the 305(b) assessment program.

Assessment Process - How Iowa's waters are assessed for the Integrated Report

Credible Data Law

Designated Uses

Federal Requirements - Water Quality Reporting

Impaired Waters

Integrated Report Categories

Presumptive Use Designations

TMDL Prioritization

Segments - Segments are the basic assessment unit - a defined body of water where monitoring is conducted and uses are designated.

Segment Sizes

WINOFI - Waters In Need Of Further Investigation

About GIS Data

Integrated Report Categories

This page was created 1/8/2016 12:49:10 PM and was last updated 4/23/2021 9:22:15 AM