Impaired Water - Willow River (North Fork Willow River)
St. Croix County, Wisconsin
SC03
2606900
32.47 - 40.59
8.12
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This segment of the 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).
Listing Details
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Impairment Unknown
Current Use
Salmonid Populations Stocked
Listing Status
303d Listed
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Low
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
2018-169
Listing Date
4/1/2018
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new total phosphorus sample data exceed 2018 WisCALM listing criteria for the Fish and Aquatic Life use, however, available biological data do not indicate impairment (i.e. no fish Index of Biotic Integrity (IBI) scored in the "poor" condition category).
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
7/26/2019