St. Croix County, Wisconsin
SC03
2609200
0.00 - 5.30
5.30
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This segment of the South Fork Willow River was evaluated for phosphorus and biology in 2018. Phosphorus levels were found to be too high. This water is covered by a restoration plan: Implementation Plan for the Lake St. Croix Nutrient Total Maximum Daily Load (expires 2025). New water quality data reviewed in the 2024 cycle indicated no additional pollutants.Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Impairment Unknown
Current Use
Unsupported Aquatic Life
Listing Status
303d Listed
Attainable Use
Coldwater - natural reproduction
Priority
Low
Designated Use
Coldwater - natural reproduction
303(d) ID
2018-170
Listing Date
4/1/2018
Impaired Water Notes
This water was assessed during the 2018 listing cycle; available total phosphorus sample data exceed 2018 WisCALM listing criteria for the Fish and Aquatic Life use, however, no biological data (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scores) were available to assess biological impairment.
Date
7/27/2017
Impaired Water Notes
This stream is covered by the following restoration plan and was classified as Category 5W as a result: Implementation Plan for the Lake St. Croix Nutrient Total Maximum Daily Load (expires 2025).
Date
7/29/2019