2020 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.
TMDL Priorities
Iowa DNR prioritizes TMDLs by balancing social impact and partnership needs with TMDL development based on time, cost, and severity.
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.
NS
Not Supported
PS
Partially Supported*
WINOFI
Water In Need of Further Investigation
*Prior to 2022 cycle. From 2022 onwards, it was dropped as there is no functional difference between Partially Supported and Not Supported.
A1
Recreation: Primary contact
A2
Recreation: Secondary contact
A3
Recreation: Children's contact
BCW1
Aquatic Life: Cold Water Type 1
BCW2
Aquatic Life: Cold Water Type 2
BLW
Aquatic Life: Lakes and wetlands
BWW1
Aquatic Life: Warm Water Type 1
BWW2
Aquatic Life: Warm Water Type 2
BWW3
Aquatic Life: Warm Water Type 3
C
Drinking Water
HH
Human Health
GenUse
General Use water
5*
303(d)-impaired last cycle; fully supporting this cycle; potential de-listing.
5a
Pollutant-caused impairment. TMDL needed.
5b
Biological impairment or pollutant-caused fish kill - unknown source. No administrative action.
5b-t
Biological - tentative
5b-v
Biological - verified
5p
Impairment occurs on a waterbody with a presumptive A1 or B(WW1) use.
| Waterbody | ADB Code | Type | Use | Support | Code | Cause of Impairment | Listing Info |
|---|