Impaired Water - Trade River (Trade River)
Polk County, Wisconsin
SC10
2636000
37.01 - 39.48
2.47
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This water was assessed during the 2016 listing cycle; general mIBI assessment indicates that this water is meeting Fish and Aquatic Life use.
Assessments during the 2020 listing cycle show total phosphorus levels too high for healthy aquatic communities like plants, fish, and bugs. This portion of the river was proposed for the impaired waters list in 2020. This water is covered by a watershed plan: Implementation Plan for the Lake St. Croix Nutrient Total Maximum Daily Load (2025).
Listing Details
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Impairment Unknown
Current Use
Coldwater - stocked, reproduction
Listing Status
303d Listed
Attainable Use
Coldwater - stocked, reproduction
Priority
Low
Designated Use
Coldwater - stocked, reproduction
303(d) ID
2020-056
Listing Date
4/1/2020
Impaired Water Notes
This water was assessed during the 2020 listing cycle; new total phosphorus sample data exceed 2020 WisCALM listing criteria for the 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
7/24/2019

Impaired Water Notes
This stream is covered by the following watershed plan and this listing was classified as Category 5W as a result: Implementation Plan for the Lake St. Croix Nutrient Total Maximum Daily Load (2025).
Date
8/15/2019