Impaired Water - Johnson Creek (Johnson Creek)
Jefferson County, Wisconsin
UR07
846700
0.00 - 17.50
17.50
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
Johnson Creek has been on the state's 303(d) impaired waters list since 1998 for Total Suspended Solids. This stream was included in the Rock River TMDL that was approved by the U.S. EPA in 2011. This water was assessed during the 2012 listing cycle, and total phosphorus sample data exceed 2012 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).
This water was assessed during the 2014 listing cycle; total phosphorus sample data overwhelmingly exceed 2014 WisCALM listing thresholds 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).
This water was assessed during the 2016 listing cycle; total phosphorus sample data overwhelmingly exceeded 2016 WisCALM listing thresholds 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).
This water was assessed during the 2018 listing cycle; new total phosphorus sample data overwhelmingly exceed 2018 WisCALM listing criteria for the Fish and Aquatic Life use and biological impairment was observed (i.e. at least one fish or macroinvertebrate Index of Biotic Integrity (IBI) scored in the poor condition category).

Assessments of new total phosphorus data during the 2020 listing cycle confirm impairment, however, fish sample data were in good condition.
Listing Details
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Degraded Biological Community
Current Use
LFF - Limited Forage Fishery
Listing Status
TMDL Approved
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Not Applicable
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
2012-37
Listing Date
4/1/2012
Impaired Water Notes
Based on the total phosphorus criteria excursions and the corroborating biological assessment, "degraded biological community" impairment was added to the existing impaired water listing in 2012.
Date
8/2/2011

Impaired Water Notes
Johnson Creek (846700, miles 0-17.5) is a part of the Rock River Basin and is listed as impaired for total phosphorus and sediment/total suspended solids. The Rock River Basin TMDLs for phosphorus and sediment were approved by the USEPA September 28, 2011.
Date
5/8/2012

Impaired Water Notes
This water was assessed during the 2014 listing cycle; total phosphorus sample data overwhelmingly exceed 2014 WisCALM listing thresholds 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).
Date
4/1/2014

Impaired Water Notes
This water was assessed during the 2016 listing cycle; total phosphorus sample data overwhelmingly exceeded 2016 WisCALM listing thresholds 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).
Date
9/23/2015

Impaired Water Notes
This water was assessed during the 2020 listing cycle; new total phosphorus sample data exceeded 2020 WisCALM listing criteria for the Aquatic Life use, however, available biological data do not indicate impairment (i.e. no 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
8/14/2019

 
Pollutant
Sediment/Total Suspended Solids
Listed For
Fish and Aquatic Life
Impairments
Degraded Habitat
Current Use
LFF - Limited Forage Fishery
Listing Status
TMDL Approved
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Not Applicable
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
824
Listing Date
4/1/2006
Impaired Water Notes
Baseline Monitoring at Ranch Road
**9** Fish Assessment, 8/28/2002, IBI Score = 17 (very poor), (too few fish to calculate IBI)
Habitat Assessment, 7/30/2002, Qualitative Habitat Rating = 15 (poor), (0 pools, 0 riffles, high percent silt and sediment)
Invertebrate Assessment, 10/10/2002, HBI (South Central District Biotic Index) = 4.299 (very good)
Baseline Monitoring at Switzke Road
**9** Fish Assessment, 7/19/2004, IBI Score = 26 (poor)
**9** Habitat Assessment, 7/27/2004, high percent silt and sediment
Date
1/19/2006

Impaired Water Notes
Johnson Creek (846700, miles 0-17.5) is a part of the Rock River Basin and is listed as impaired for total phosphorus and sediment/total suspended solids. The Rock River Basin TMDLs for phosphorus and sediment were approved by the USEPA September 28, 2011.
Date
5/8/2012