Impaired Water - Eagle Lake (Eagle Lake (Eagle Chain))
Vilas County, Wisconsin
UW44
1600200
574.83
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
Previously on the 303(d) list due to mercury, but was delisted 2006 because new data verfiy general fish consumption advisory only, not specific advisory.

Eagle Lake was evaluated every two-year cycle from 2014 to 2022. During the 2018 cycle it was determined that this is not a Two-Story Fishery Lake, but instead a Deep Lowland Drainage Lake. There was insufficient data to assess phosphorus for the 2018 cycle, but because of the classification change the 2016 assessment was reviewed. With the new classification this lake should not have been listed for total phosphorus because the criteria are actually 30 ug/L instead of 15 ug/L. The total phosphorus listing was removed, but the excess algal growth impairment remained.
The 2022 cycle evaluation of aquatic plant data indicated healthy communities.
Listing Details
Pollutant
Unknown Pollutant
Listed For
Recreation
Impairments
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
2018-303
Listing Date
4/1/2018
Impaired Water Notes
During the 2018 cycle it was determined that this is not a Two-Story Fishery Lake, but instead a Deep Lowland Drainage Lake. There was insufficient data to assess phosphorus for the 2018 cycle, but because of the classification change the 2016 assessment was reviewed. With the new classification this lake should not have been listed for total phosphorus because the criteria are actually 30 ug/L instead of 15 ug/L. The total phosphorus listing is proposed for removal, but the excess algal growth impairment remains.
Date
1/19/2018

 
Pollutant
Total Phosphorus
Listed For
Recreation
Impairments
Excess Algal Growth
Current Use
Restricted Recreation
Listing Status
Pollutant Removed
Attainable Use
Full Body Contact - Swimming, Boating
Priority
Delisted 2018
Designated Use
Full Body Contact - Swimming, Boating
303(d) ID
2014-257
Listing Date
4/1/2014
Impaired Water Notes
During the 2018 cycle it was determined that this is not a Two-Story Fishery Lake, but instead a Deep Lowland Drainage Lake. There was insufficient data to assess phosphorus for the 2018 cycle, but because of the classification change the 2016 assessment was reviewed. With the new classification this lake should not have been listed for total phosphorus because the criteria are actually 30 ug/L instead of 15 ug/L. The total phosphorus listing is proposed for removal, but the excess algal growth impairment remains.
Date
1/19/2018

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, however chlorophyll data do not exceed REC or FAL thresholds.
Date
1/10/2014

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, chlorophyll data only exceed REC thresholds, not FAL.
Date
10/9/2015

 
Pollutant
Mercury
Listed For
Impairments
NA
Current Use
Listing Status
Water Delisted
Attainable Use
Priority
Delisted 2006
Designated Use
303(d) ID
122
Listing Date
4/1/1998
Impaired Water Notes
New data verify general fish consumption advisory only, not specific advisory
Date
4/1/2006