Grant County, Wisconsin
GP01
721000
580.80 - 583.00
2.20
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This reach of the river is impaired for general water quality restrictions due to mercury and PCBs in the water column exceeding water quality standards as well as specific advisories for mercury and PCBs in fish tissue.
Elevated phosphorus was identified in the 2016 and 2018 cycles. New water quality data reviewed in the 2024 cycle identified excess algal growth.Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Impairment Unknown, Excess Algal Growth
Current Use
Unsupported Aquatic Life
Listing Status
303d Listed
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Low
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
2016-277
Listing Date
4/1/2016
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, no biological data (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scores) were available to assess biological impairment.
Date
8/8/2017
Impaired Water Notes
This water was assessed during the 2016 listing cycle; total phosphorus sample data exceed 2016 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
8/29/2015
Pollutant
PCBs
Listed For
Wildlife
Impairments
PCBs Contaminated Fish Tissue, Impairment Unknown
Current Use
Restricted Wildlife Use
Listing Status
303d Listed
Attainable Use
Wildlife Use
Priority
Low
Designated Use
Wildlife Use
303(d) ID
594
Listing Date
4/1/1998
Impaired Water Notes
Specific advisory for PCBs in fish.
Date
4/1/2006
Pollutant
Mercury
Listed For
Wildlife
Impairments
Acute Aquatic Toxicity, Mercury Contaminated Fish Tissue, Impairment Unknown, Elevated Human Health Risks - Toxics
Current Use
Restricted Wildlife Use
Listing Status
303d Listed
Attainable Use
Wildlife Use
Priority
Low
Designated Use
Wildlife Use
303(d) ID
530
Listing Date
4/1/1998