Iowa DNR

Water Quality Assessments

Impaired Waters List

2000 Assessment Summary - Category 5 - Water is impaired or threatened and a TMDL is needed

303(d) List of Impaired Waters

The State's Section 303(d) list of impaired waters. The waterbody is impaired and a total maximum daily load (TMDL) is needed.
Note: Mouse over (or click on a mobile device) the icon for descriptions of those field values. Additional information can be found in the reference codex.
Water is impaired or a declining water quality trend is evident, and a TMDL is needed.
Impairment is based on results of biological monitoring or a fish kill investigation where specific causes and/or sources of the impairment have not yet been identified.
Tentative biological impairments and old fish kill impairments.
Verified biological impairments and recent fish kill impairments.
Impairment is based on a presumptive designated use. A use attainability analysis (UAA) will be required to determine whether the presumptive use is, in fact, the appropriate designated use for the impaired waterbody.
Waterbody ADB Code Type