Impaired Water - Allen Creek (Allen Creek)
Rock County, Wisconsin
SP13
883700
15.00 - 20.21
5.21
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This water was assessed during the 2016 listing cycle; biological impairment was observed (i.e. at least one macroinvertebrate or fish Index of Biotic Integrity (IBI) average scored in the poor condition category).

Assessments during the 2020 listing cycle confirmed poor biological community and showed total phosphorus levels too high for healthy aquatic communities like plants, bugs, and fish. Total phosphorus was added to the previous listing in 2020.
Listing Details
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Degraded Biological Community
Current Use
Coldwater - stocked, reproduction
Listing Status
303d Listed
Attainable Use
Coldwater - stocked, reproduction
Priority
Low
Designated Use
Coldwater - stocked, reproduction
303(d) ID
2020-135
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 Fish and Aquatic Life use and biological impairment was observed (i.e. at least one fish and macroinvertebrate Index of Biotic Integrity (IBI) scored in the poor condition category).
Date
8/1/2019

 
Pollutant
Unknown Pollutant
Listed For
Fish and Aquatic Life
Impairments
Degraded Biological Community
Current Use
Coldwater - stocked, reproduction
Listing Status
Pollutant Removed
Attainable Use
Coldwater - stocked, reproduction
Priority
Delisted 2020
Designated Use
Coldwater - stocked, reproduction
303(d) ID
2016-106
Listing Date
4/1/2016
Impaired Water Notes
This water was assessed during the 2016 listing cycle; biological impairment was observed (i.e. at least one macroinvertebrate or fish Index of Biotic Integrity (IBI) average scored in the poor condition category).
Date
8/29/2015

Impaired Water Notes
2020 assessment found phosphorus exceeding criteria so phosphorus listing is replacing "unknown pollutant".
Date
8/13/2019