Impaired Water - Rat River (Rat River)
Winnebago County, Wisconsin
WR01, WR04
251800
0.00 - 13.14
13.14
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
On 303d list for Total Phosphorus since 1998. This water was assessed during the 2014 listing cycle; total phosphorus sample data exceed 2014 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).
This water was assessed during the 2016 listing cycle; temperature data exceeded 2016 WisCALM listing thresholds for the Fish and Aquatic Life use. Chloride sample data clearly met 2016 WisCALM chronic and acute listing criteria for the Fish and Aquatic Life use.

This water was assessed during the 2018 listing cycle; new total phosphorus sample data may exceed 2018 WisCALM listing criteria for the Fish and Aquatic Life use. Temperature sample data also indicated impairment, however, available chloride data do not indicate impairment.
This water is covered by the Upper Fox & Wolf River Basins TMDL, approved by the US EPA on February 27, 2020.
Listing Details
Pollutant
Unknown Pollutant
Listed For
Fish and Aquatic Life
Impairments
Elevated Water Temperature
Current Use
WWSF - Warmwater Sport Fishery
Listing Status
303d Listed
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Low
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
2016-048
Listing Date
4/1/2016
Impaired Water Notes
This water was assessed during the 2016 listing cycle; temperature data exceeded 2016 WisCALM listing thresholds for the Fish and Aquatic Life use.
Date
8/30/2015

 
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Low DO
Current Use
WWSF - Warmwater Sport Fishery
Listing Status
TMDL Approved
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Not Applicable
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
378
Listing Date
4/1/1998
Impaired Water Notes
This water was assessed during the 2014 listing cycle; total phosphorus sample data exceed 2014 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
2/27/2014

Impaired Water Notes
This water is covered by the Upper Fox & Wolf River Basins TMDL, approved by the US EPA on February 27, 2020.
Date
3/4/2020