Dunn County, Wisconsin
LC04
2065900
1,008.65
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
On 303d impaired waters list since 1998 for Total Phosphorus; TMDL was approved in 2012. High phosphorus levels were confirmed every two year cycle from 2012 to 2026.Pollutant
Total Phosphorus
Listed For
Recreation
Impairments
Excess Algal Growth, Elevated pH , Eutrophication
Current Use
Restricted Recreation
Listing Status
TMDL Approved
Attainable Use
Recreation
Priority
Not Applicable
Designated Use
Recreation
303(d) ID
281
Listing Date
4/1/1998
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new chlorophyll sample data exceeded 2018 WisCALM listing thresholds for the Recreation use.
Date
7/12/2017
Impaired Water Notes
Blue Green sampling was completed from 2004 - 2006 at multiple sites on the lake. SWIMs ID numbers = 173260, 173261, 173262. Monitoring found very high chlorophyll a numbers and detectable concentrations of toxins in water. In most cases monitoring sites were selected to represent worse case conditions in the lake.
Date
2/1/2008
Impaired Water Notes
TP and/or chlorophyll data from the period 2006-2010 were insufficient to assess per 2012 WisCALM. However, the historical chlorophyll and toxin data indicate recreation use impairment, in addition to the previous fish and aquatic life impairment.
Date
6/13/2011
Impaired Water Notes
This water was assessed during the 2014 listing cycle; total phosphorus sample data exceed 2014 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use.
Date
3/24/2014
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 and Fish and Aquatic Life use.
Date
10/9/2015
Impaired Water Notes
This water was assessed during the 2020 listing cycle; new total phosphorus sample data exceeded 2020 WisCALM listing thresholds; chlorophyll data only exceeded REC thresholds, not FAL.
Date
6/19/2019