Green County, Wisconsin
SP11
877600
0.00 - 4.75
4.75
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
Riley School Branch was put on the Impaired Waters List during the 2016 cycle for phosphorus and sediment. Evaluations every two-year cycle from 2018 to 2024 confirmed the phosphorus impairment.Pollutant
Sediment/Total Suspended Solids
Listed For
Fish and Aquatic Life
Impairments
Degraded Habitat
Current Use
Unsupported Aquatic Life
Listing Status
303d Listed
Attainable Use
Default - Fish and Aquatic Life
Priority
Medium
Designated Use
Default - Fish and Aquatic Life
303(d) ID
2016-104
Listing Date
4/1/2016
Impaired Water Notes
It is recommended that Riley School Branch be added to the state�s 303(d) list of impaired waters due to habitat degradation caused by sedimentation.
Date
8/24/2015
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Degraded Biological Community
Current Use
Unsupported Aquatic Life
Listing Status
303d Listed
Attainable Use
Default - Fish and Aquatic Life
Priority
Medium
Designated Use
Default - Fish and Aquatic Life
303(d) ID
2016-103
Listing Date
4/1/2016
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 and biological impairment was observed (i.e. at least one macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the poor condition category).
Date
8/24/2015
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 new biological data (i.e. macroinvertebrate or fish Index of Biotic Integrity (IBI) already scored in previous water evaluation cycles) were available to assess further biological impairment.
Date
4/18/2017
Impaired Water Notes
This water was assessed during the 2020 listing cycle; new total phosphorus sample data overwhelmingly exceed 2020 WisCALM listing criteria for the Fish and Aquatic Life use and biological impairment was observed (i.e. at least one macroinvertebrate and fish Index of Biotic Integrity (IBI) scored in the poor condition category).
Date
6/17/2019
Impaired Water Notes
This water was assessed during the 2022 listing cycle; new total phosphorus sample data overwhelmingly exceed 2022 WisCALM listing criteria for the Fish and Aquatic Life use.
Date
5/25/2021