Impaired Water - Long Lake (Long Lake T47 R8w S2)
Bayfield County, Wisconsin
LS05
2767100
279.62
Proposed for removal from impaired waters during assessment period.
Notes
Long Lake is on 303(d) list due to mercury and is proposed for removal based on 2001 updated Fish Consumption advisories.

This water was assessed for phosphorus every two years between 2014 to 2020 and no impairment was found. This water was assessed for algae and impairment was found in 2016 and 2018. The 2020 evaluation of algae found no impairment. This lake was proposed for delisting in 2020.
Listing Details
Pollutant
Unknown Pollutant
Listed For
Impairments
NA
Current Use
Listing Status
Delist
Attainable Use
Priority
Not Applicable
Designated Use
303(d) ID
2016-269
Listing Date
4/1/2016
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. Total phosphorus data were clearly below Recreation use and Fish and Aquatic Life use listing thresholds.
Date
7/12/2017

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 data do not exceed REC thresholds. Total phosphorus and chlorophyll data do not exceed Fish and Aquatic Life thresholds.
Date
8/7/2015

Impaired Water Notes
This water was assessed during the 2020 listing cycle; new chlorophyll sample data were clearly below 2020 WisCALM listing thresholds for the Recreation use and the Aquatic Life use.
Date
8/12/2019

 
Pollutant
Mercury
Listed For
Impairments
NA
Current Use
Listing Status
Delist
Attainable Use
Priority
Not Applicable
Designated Use
303(d) ID
252
Listing Date
4/1/1998
Impaired Water Notes
This listing was part of a set removed from the impaired waters list due to a change in fish consumption advisory levels in 2001. In 2001 Wisconsin DNR put into effect a statewide fish consumption advisory for mercury due to atmospheric deposition. Most of the lakes removed from the specific fish consumption advisories list in 2001 were not removed from the impaired waters list even though the thresholds had changed. For the 2020 assessment process WDNR requested delisting of 91 waters with residual mercury listings from prior to 2001. This request was approved by US EPA.
Date
9/4/2018