Sawyer County, Wisconsin
UC20
2390800
5,139.54
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
Lac Courte Oreilles was evaluated for phosphorus and algae every two years from 2012 to 2024. Phosphorus and algae levels were found to be at acceptable levels for a Two-Story Fishery lake. In 2018 dissolved oxygen (DO) levels were found to be too low to support healthy fish communities. The lake was listed for low DO in 2018.Pollutant
Unknown Pollutant
Listed For
Fish and Aquatic Life
Impairments
Low DO
Current Use
Unsupported Aquatic Life
Listing Status
303d Listed
Attainable Use
Default - Fish and Aquatic Life
Priority
Low
Designated Use
Default - Fish and Aquatic Life
303(d) ID
2018-277
Listing Date
4/1/2018
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new dissolved oxygen data clearly exceeded listing thresholds for the Fish and Aquatic Life Use. This lake is proposed for listing.
Date
8/4/2017