Burnett County, Wisconsin
SC10
2638700
327.31
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
Big Trade Lake was evaluated for phosphorus and algae every two years between 2018 and 2024. Phosphorus levels were found to be too high as shown by algal blooms. This lake is covered by a restoration plan: Implementation Plan for the Lake St. Croix Nutrient Total Maximum Daily Load (expires 2025).Pollutant
Total Phosphorus
Listed For
Recreation
Impairments
Impairment Unknown, Excess Algal Growth
Current Use
Restricted Recreation
Listing Status
303d Listed
Attainable Use
Recreation
Priority
Low
Designated Use
Recreation
303(d) ID
2018-273
Listing Date
4/1/2018
Impaired Water Notes
This water was assessed during the 2018 listing cycle; preliminary analysis results of new total phosphorus sample data exceeded 2018 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use; chlorophyll data only exceeded REC thresholds, not FAL.
Date
8/3/2017
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. This lake is covered by a restoration plan: Implementation Plan for the Lake St. Croix Nutrient Total Maximum Daily Load (2025).
Date
7/24/2019
Impaired Water Notes
This water was assessed during the 2022 listing cycle; total phosphorus sample data clearly exceeded 2022 WisCALM listing thresholds for the Recreation use and Aquatic Life use.
Date
5/25/2021