Impaired Water - Lake Redstone (Redstone Lake)
Sauk County, Wisconsin
LW23
1280400
604.55
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This water was assessed during the 2014 listing cycle; total phosphorus sample data exceed 2014 WisCALM listing thresholds for the Recreation use, but not Fish and Aquatic Life use and chlorophyll data exceeds both REC and FAL thresholds.

This water was assessed during the 2016 listing cycle: total phosphorus sample data exceed 2016 WisCALM listing thresholds for the Recreation use, but not Fish and Aquatic Life use, and chlorophyll data exceeds both REC and FAL thresholds.

This water was assessed during the 2018 listing cycle; new total phosphorus and chlorophyll sample data exceeded 2018 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use. New data in 2020 confirm listing.
This water is part of the Wisconsin River TMDL.
Listing Details
Pollutant
Unknown Pollutant
Listed For
Fish and Aquatic Life
Impairments
NA
Current Use
Salmonid Populations Stocked
Listing Status
Pollutant Removed
Attainable Use
FAL - Fish and Aquatic Life Community
Priority
Delisted 2018
Designated Use
FAL - Fish and Aquatic Life Community
303(d) ID
2016-138
Listing Date
4/1/2016
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new total phosphorus and chlorophyll sample data exceeded 2018 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use.

Proposing the deletion of Unknown Pollutant because its impairment Eutrophication is linked to the pollutant Total Phosphorus.
Date
7/10/2017

Impaired Water Notes
This water was assessed during the 2016 listing cycle: total phosphorus sample data exceed 2016 WisCALM listing thresholds for the Recreation use, but not Fish and Aquatic Life use, and chlorophyll data exceeds both REC and FAL thresholds.
Date
10/12/2015

 
Pollutant
Total Phosphorus
Listed For
Recreation
Impairments
Excess Algal Growth
Current Use
Restricted Recreation
Listing Status
TMDL Approved
Attainable Use
Full Body Contact - Swimming, Boating
Priority
Not Applicable
Designated Use
Full Body Contact - Swimming, Boating
303(d) ID
2014-245
Listing Date
4/1/2014
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new total phosphorus and chlorophyll sample data exceeded 2018 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use.
Date
7/10/2017

Impaired Water Notes
This water was assessed during the 2014 listing cycle; total phosphorus sample data exceed 2014 WisCALM listing thresholds for the Recreation use, but not Fish and Aquatic Life use and chlorophyll data exceeds both REC and FAL thresholds.
Date
1/10/2014

Impaired Water Notes
This water was assessed during the 2016 listing cycle: total phosphorus sample data exceed 2016 WisCALM listing thresholds for the Recreation use, but not Fish and Aquatic Life use, and chlorophyll data exceeds both REC and FAL thresholds.
Date
10/12/2015

Impaired Water Notes
This water is part of the 2019 approved Wisconsin River TMDL addressing Total Phosphorus and Total Suspended Solids.
Date
6/10/2019

Impaired Water Notes
This water was assessed during the 2020 listing cycle; total phosphorus sample data overwhelmingly exceeded 2020 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use, and chlorophyll data also exceeded REC and FAL thresholds. Based on the most updated information, no change in existing impaired waters listing is needed.
Date
6/19/2019