Impaired Water - Koshkonong Creek (Upper Koshkonong )
Dane, Jefferson County, Wisconsin
LR11, LR12
808800
27.27 - 48.42
21.15
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This portion of Koshkonong Creek was evaluated every two years from 2012 to 2020 for temperature, phosphorus, and biology. Phosphorus levels were found to be too high, reflected in the poor condition of fish and bug communities. The 2020 evaluation found temperature levels were good and this listing was removed.
Listing Details
Pollutant
Unknown Pollutant
Listed For
Fish and Aquatic Life
Impairments
NA
Current Use
WWSF - Warmwater Sport Fishery
Listing Status
Pollutant Removed
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Delisted 2020
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
2016-085
Listing Date
4/1/2016
Impaired Water Notes
This water was assessed during the 2016 listing cycle; temperature data exceeded 2016 WisCALM listing thresholds for the Fish and Aquatic Life use.
Date
9/2/2015

Impaired Water Notes
This water was assessed during the 2018 listing cycle; new temperature sample data exceed 2018 WisCALM listing criteria for the Fish and Aquatic Life use.
Date
4/12/2017

Impaired Water Notes
This water was assessed during the 2020 listing cycle; new temperature sample data were clearly below 2020 WisCALM listing thresholds for the Aquatic Life use. Temperature data from 2014 - 2017 shows no impairment. The exceedances were during extreme weather years (2012, 2013). This listing is proposed for removal in the 2020 cycle.
Date
8/13/2019

 
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
High Phosphorus Levels, Degraded Biological Community
Current Use
WWSF - Warmwater Sport Fishery
Listing Status
303d Listed
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Low
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
2012-982
Listing Date
4/1/2012
Impaired Water Notes
This water was assessed during the 2012 listing cycle, and total phosphorus sample data overwhelmingly exceed listing criteria (i.e. two times the applicable criterion) for the fish and aquatic life use.
Date
2/28/2013

Impaired Water Notes
This water was assessed during the 2014 listing cycle; total phosphorus sample data overwhelmingly exceed 2014 WisCALM listing criteria for the Fish and Aquatic Life use and biological impairment was observed (i.e. at least one macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the poor condition category).
Date
2/27/2014

Impaired Water Notes
This water was assessed during the 2016 listing cycle; total phosphorus sample data overwhelmingly exceed 2016 WisCALM listing criteria for the Fish and Aquatic Life use and biological impairment was observed (i.e. at least one macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the poor condition category).
Date
9/2/2015

Impaired Water Notes
This water was assessed during the 2022 listing cycle; total phosphorus sample data overwhelmingly exceed 2022 WisCALM listing criteria for the Fish and Aquatic Life use and biological impairment was observed (i.e. at least one macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the poor condition category).
Date
5/24/2021