Impaired Water - South Turtle Lake (Turtle Lake, South)
Vilas County, Wisconsin
UC14
2310200
466.19
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
South Turtle Lake is on the 303(d) list due to mercury but the mercury listings is proposed for removal based on 2001 updated Fish Consumption advisories.

This lake was assessed for phosphorus and algae every two years between 2014 and 2020; an impairment of excess algal growth was identified in 2018 and confirmed in 2020.
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
2018-270
Listing Date
4/1/2018
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
8/3/2017

Impaired Water Notes
This water was assessed during the 2020 listing cycle; new chlorophyll sample data exceeded 2020 WisCALM listing thresholds for the Recreation use. Total phosphorus data were clearly below Recreation use and Aquatic Life use listing thresholds.
Date
8/1/2019

 
Pollutant
Mercury
Listed For
Impairments
NA
Current Use
Listing Status
Pollutant Removed
Attainable Use
Priority
Delisted 2020
Designated Use
303(d) ID
445
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