Impaired Water - Lake Desair (Lake Desair)
Barron County, Wisconsin
LC10
2104500
79.48
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This water was originally listed in 1998 due to eutrophication impairment caused by excess total phosphorus and TSS.

Desair Lake was evaluated for phosphorus and algae every two years between 1998 and 2020. Phosphorus levels were found to be too high, which was reflected in algal blooms. This lake is covered by a restoration plan: Implementation Plan for the Lake St. Croix Nutrient Total Maximum Daily Load (expires 2025).
Listing Details
Pollutant
Total Phosphorus
Listed For
Recreation
Impairments
Eutrophication, Excess Algal Growth
Current Use
Restricted Recreation
Listing Status
303d Listed
Attainable Use
Full Body Contact - Swimming, Boating
Priority
Low
Designated Use
Full Body Contact - Swimming, Boating
303(d) ID
106
Listing Date
4/1/1998
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new total phosphorus and chlorophyll sample data exceeded 2018 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use.
Date
7/10/2017

Impaired Water Notes
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 and recreation uses. Chlorophyll data from the period 2006-2010 did not exceed listing thresholds for either the fish and aquatic life or recreation uses, as per 2012 WisCALM. However, review of recent and historic chlorophyll data and user perception survey results confirm the recreation use impairment (91% of samples from the past ten years exceeded the listing threshold of 10ug/L).
Date
6/14/2011

Impaired Water Notes
This water was assessed during the 2014 listing cycle; total phosphorus and chlorophyll-a sample data exceed 2014 WisCALM listing criteria for recreation use.
Date
3/21/2014

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, but not Fish and Aquatic Life use, and chlorophyll data exceeds both REC and FAL thresholds.
Date
10/12/2015

Impaired Water Notes
This water was assessed during the 2020 listing cycle; total phosphorus and chlorophyll sample data exceeded 2020 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use. This lake is covered by the following restoration plan and was classified as Category 5W as a result: Implementation Plan for the Lake St. Croix Nutrient Total Maximum Daily Load (2025).
Date
7/24/2019

 
Pollutant
Sediment/Total Suspended Solids
Listed For
Fish and Aquatic Life
Impairments
Eutrophication
Current Use
Deep Seepage Lake
Listing Status
303d Listed
Attainable Use
FAL - Fish and Aquatic Life Community
Priority
Low
Designated Use
FAL - Fish and Aquatic Life Community
303(d) ID
106
Listing Date
4/1/1998
Impaired Water Notes
This lake is covered by the following restoration plan and was classified as Category 5W as a result: Implementation Plan for the Lake St. Croix Nutrient Total Maximum Daily Load (2025).
Date
7/24/2019