Impaired Water - Little Dummy Lake (Little Dummy Lake)
Barron County, Wisconsin
LC09
1861400
42.69
Condition has improved over time; water is not impaired.
Notes
Little Dummy Lake was evaluated for phosphorus and algae every two years between 2012 and 2020. Phosphorus levels were found to be too high during these cycles. In the 2022 cycle phosphorus data were below criteria; this lake was removed from the Impaired Waters List in the 2022 cycle; low levels were confirmed in the 2024 cycle. This lake is covered by a restoration plan: A Water Quality Strategy for the Land and Waters of the Red Cedar River Basin (2026).
Listing Details
Pollutant
Total Phosphorus
Listed For
Impairments
NA
Current Use
Listing Status
Water Delisted
Attainable Use
Priority
Delisted 2022
Designated Use
303(d) ID
2016-272
Listing Date
4/1/2016
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new chlorophyll sample data were clearly below 2018 WisCALM listing thresholds for the Recreation use and the Fish and Aquatic Life use. Total Phosphorus sample data were not clearly below listing thresholds.
Date
7/13/2017

Impaired Water Notes
This water was assessed during the 2016 listing cycle; total phosphorus sample data exceed 2016 WisCALM listing thresholds for the Recreation use, however, chlorophyll data do not exceed REC thresholds. Total phosphorus and chlorophyll data do not exceed Fish and Aquatic Life thresholds.
Date
8/19/2015

Impaired Water Notes
This water was assessed during the 2020 listing cycle; chlorophyll sample data were clearly below 2020 WisCALM listing thresholds for the Recreation use and the Fish and Aquatic Life use. New total phosphorus sample data were not clearly below listing thresholds. This lake is covered by a restoration plan: A Water Quality Strategy for the Land and Waters of the Red Cedar River Basin (2026).
Date
7/24/2019

Impaired Water Notes
This water was assessed during the 2022 cycle; with 5 years of phosphorus sample data this lake is proposed for removal from the Impaired Waters List.
Date
6/14/2021