Impaired Water - Wisconsin River (Wisconsin River)
Lincoln, Marathon County, Wisconsin
CW20, CW24, CW27, CW28, CW29
1179900
268.18 - 289.34
21.16
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This segment of the Wisconsin River has been listed on the state's 303(d) impaired waters list since 1998 for Mercury and PCBs.

This water was assessed during the 2014 listing cycle; total phosphorus sample data clearly met 2014 WisCALM listing thresholds for the Fish and Aquatic Life use (no biological data (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scores) were available to assess biological impairment).

This water was assessed during the 2018 listing cycle; new total phosphorus, biological (fish Index of Biotic Integrity (IBI) scores), and chloride sample data were clearly below 2018 WisCALM listing thresholds for the Fish and Aquatic Life use.

Assessments of new total phosphorus and chloride data during the 2020 listing cycle showed conditions appropriate for healthy aquatic communities like plants, fish, and bugs.
Listing Details
Pollutant
PCBs
Listed For
Fish Consumption
Impairments
PCBs Contaminated Fish Tissue
Current Use
Specific Restricted Fish Consumption
Listing Status
303d Listed
Attainable Use
Unrestricted Fish Consumption
Priority
Low
Designated Use
Unrestricted Fish Consumption
303(d) ID
530
Listing Date
4/1/1998
 
Pollutant
Mercury
Listed For
Fish Consumption
Impairments
Mercury Contaminated Fish Tissue
Current Use
Specific Restricted Fish Consumption
Listing Status
303d Listed
Attainable Use
Unrestricted Fish Consumption
Priority
Low
Designated Use
Unrestricted Fish Consumption
303(d) ID
530
Listing Date
4/1/1998