Oneida County, Wisconsin
UW42
1590400
580.71
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
Pickerel Lake was on the Impaired Waters List for mercury in fish tissue from the 1998 to 2018 cycles. The lake was listed for excess algal growth in the 2014 cycle and elevated phosphorus in the 2022 cycle. Evaluations every two-year cycle from 2016 to 2024 confirmed the excess algal growth.Pollutant
Total Phosphorus
Listed For
Recreation
Impairments
Impairment Unknown, Excess Algal Growth
Current Use
Restricted Recreation
Listing Status
303d Listed
Attainable Use
Recreation
Priority
Low
Designated Use
Recreation
303(d) ID
2022-043
Listing Date
4/1/2022
Impaired Water Notes
This water was assessed during the 2022 cycle; new chlorophyll-a sample data exceeded 2022 WisCALM listing criteria for Recreation use. Phosphorus levels have been at "May Exceed" since the 2014 cycle, with new data added each time. It was decided to add Phosphorus to the Impaired Waters List based on the long record of data.
This waterbody has a huge watershed relative to the lake size. The watershed is 92% natural landcover (forest and wetland). Although the data shows that it may exceed for TP and chlorophyll the values haven't changed over the past twenty years. It is a eutrophic lake most likely because of it's position in the large watershed and the shallow depth.
Date
6/14/2021
Pollutant
Unknown Pollutant
Listed For
Recreation
Impairments
Excess Algal Growth
Current Use
Restricted Recreation
Listing Status
Pollutant Removed
Attainable Use
Recreation
Priority
Delisted 2022
Designated Use
Recreation
303(d) ID
2014-253
Listing Date
4/1/2014
Impaired Water Notes
This water was assessed during the 2014 listing cycle; chlorophyll sample data exceed 2014 WisCALM listing thresholds for the Recreation use, however, total phosphorus data do not exceed REC thresholds. Total phosphorus and chlorophyll data do not exceed Fish and Aquatic Life thresholds.
Date
1/10/2014
Impaired Water Notes
This water was assessed during the 2016 listing cycle; chlorophyll sample data exceed 2016 WisCALM listing thresholds for the Recreation use, however, total phosphorus were clearly below REC thresholds. Total phosphorus and chlorophyll data were clearly below Fish and Aquatic Life listing thresholds.
Date
10/19/2015
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new chlorophyll sample data clearly exceeded 2018 WisCALM listing criteria for Recreation use.
Date
5/24/2017
Impaired Water Notes
This water was assessed during the 2020 listing cycle; chlorophyll sample data exceeded 2020 WisCALM listing thresholds for the Recreation use. Based on the most updated information, no change in existing impaired waters listing is needed.
Date
6/12/2019
Impaired Water Notes
Phosphorus was identified as the contributing pollutant to the excess algal growth impairment during the 2022 cycle. This unknown pollutant is proposed for delisting.
Date
6/14/2021
Pollutant
Mercury
Listed For
Impairments
NA
Current Use
Listing Status
Pollutant Removed
Attainable Use
Priority
Delisted 2018
Designated Use
303(d) ID
351
Listing Date
4/1/1998
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new fish tissue data indicates that this waterbody no longer needs a specific fish consumption advice for Mercury. This water should have its Mercury listing removed.
Date
5/24/2017