Impaired Water - Lake Mohawksin (Lake Mohawksin)
Lincoln County, Wisconsin
UW33, UW35, UW39
1515400
1,508.34
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This water was assessed during the 2012 listing cycle, and total phosphorus sample data do not exceed 2012 WisCALM listing criteria for the recreation use; however, chlorophyll a levels exceed recreation use listing thresholds. Additional monitoring is recommended to identify the pollutant causing excess algal growth.

This water was assessed during the 2014 listing cycle; total phosphorus sample data clearly met 2014 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use. This waterbody was determined to be an Impounded Flowing Water so the river TP criteria apply.

This water was assessed during the 2018 listing cycle; new total phosphorus sample data were clearly below 2018 WisCALM listing thresholds for the Recreation use and the Fish and Aquatic Life use. For the Fish Consumption use new fish tissue analysis showed no need for specific fish consumption advisories for this lake.

Assessments of new total phosphorus data during the 2020 listing cycle confirm good condition of Aquatic Life and Recreation uses. Chlorophyll was also assessed and found to be too high for Recreation use standards.
Listing Details
Pollutant
Mercury
Listed For
Impairments
Mercury Contaminated Fish Tissue
Current Use
Listing Status
Pollutant Removed
Attainable Use
Priority
Delisted 2008
Designated Use
303(d) ID
531, 527
Listing Date
4/1/1998
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new fish tissue analysis showed no need for specific fish consumption advisories for this lake.
Date
7/24/2017

Impaired Water Notes
New fish data removes listing.
Date
4/1/2008

 
Pollutant
BOD, sediment load
Listed For
Fish and Aquatic Life
Impairments
Low DO
Current Use
Impounded Flowing Water
Listing Status
303d Listed
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Low
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
531, 527
Listing Date
4/1/1998