Iowa DNR
ADBNet

Water Quality Assessments

Impaired Waters List

2016 Assessment Summary - Assesed Uses

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.
A1
Recreation: Primary contact
A2
Recreation: Secondary contact
A3
Recreation: Children's contact
B(CW1)
Aquatic Life: Cold Water Type 1
B(CW2)
Aquatic Life: Cold Water Type 2
B(LW)
Aquatic Life: Lakes and wetlands
B(WW-1)
Aquatic Life: Warm Water Type 1
B(WW-2)
Aquatic Life: Warm Water Type 2
B(WW-3)
Aquatic Life: Warm Water Type 3
C
Drinking Water
HH
Human Health
OIW
Outstanding Iowa Water
3b
Use potentially impaired based on an evaluated assessment.
3b-c
Use potentially biologically impaired based on calibrated IBI metrics.
3b-u
Use potentially biologically impaired based on uncalibrated IBI metrics.
4a
Pollutant-caused impairment. TMDL has been completed.
4c
Non-pollutant caused impairment. No TMDL needed.
4d
Pollutant-caused fish kill. No TMDL needed and administrative action taken against responsible party.
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