Impaired Water - Willow Creek (Willow Creek)
Waushara County, Wisconsin
WR02
243700
14.19 - 30.44
16.25
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This water was assessed during the 2016 listing cycle; total phosphorus, biological (i.e. macroinvertebrate or fish Index of Biotic Integrity (IBI) scores), and temperature sample data clearly met 2016 WisCALM listing thresholds for the Fish and Aquatic Life use.

This water was assessed during the 2018 listing cycle; new temperature 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 macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the "poor" condition category). Available total phosphorus data were assessed, but did not exceed 2018 WisCALM listing criteria for the Fish and Aquatic Life use.
New data in 2020 confirms the 2018 listing.
Listing Details
Pollutant
Unknown Pollutant
Listed For
Fish and Aquatic Life
Impairments
Elevated Water Temperature
Current Use
Coldwater - stocked, reproduction
Listing Status
303d Listed
Attainable Use
Coldwater - stocked, reproduction
Priority
Low
Designated Use
Coldwater - stocked, reproduction
303(d) ID
2018-300
Listing Date
4/1/2018
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new temperature 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 macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the "poor" condition category). Available total phosphorus data were assessed, but did not exceed 2018 WisCALM listing criteria for the Fish and Aquatic Life use.
Date
8/3/2017

Impaired Water Notes
This water was assessed during the 2020 listing cycle; temperature sample data exceed 2020 WisCALM listing criteria for the Fish and Aquatic Life use. Total phosphorus data were clearly below Recreation use and Fish and Aquatic Life use listing thresholds. Available biological data do not indicate impairment (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the "poor" condition category). Based on the most updated information, no change in existing impaired waters listing is needed.
Date
6/12/2019