Impaired Water - Upper Eau Claire Lake (Eau Claire Lake, Upper)
Bayfield County, Wisconsin
SC18
2742700
1,024.44
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
Upper Eau Claire Lake was evaluated for chloride in 2014 and levels were not too high.

Upper Eau Claire Lake was evaluated for phosphorus and algae every two years between 2016 and 2020. Phosphorus levels were found to be too high. This lake is covered by a restoration plan: Implementation Plan for the Lake St. Croix Nutrient Total Maximum Daily Load (expires 2025).
Listing Details
Pollutant
Total Phosphorus
Listed For
Recreation
Impairments
Impairment Unknown
Current Use
Restricted Recreation
Listing Status
303d Listed
Attainable Use
Full Body Contact - Swimming, Boating
Priority
Low
Designated Use
Full Body Contact - Swimming, Boating
303(d) ID
2018-283
Listing Date
4/1/2018
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new total phosphorus sample data exceeded 2018 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use, however chlorophyll data did not exceed REC or FAL thresholds.
Date
8/4/2017

Impaired Water Notes
This water was assessed during the 2020 listing cycle; total phosphorus sample data clearly exceeded 2020 WisCALM listing thresholds for the Recreation use and Aquatic Life use, however chlorophyll data were clearly below REC and AL thresholds. This lake is covered by a restoration plan: Implementation Plan for the Lake St. Croix Nutrient Total Maximum Daily Load (expires 2025).
Date
7/24/2019