Iron County, Wisconsin
LS13
2923100
7.34 - 25.65
18.31
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This water was assessed in 2014 and every two year cycle from 2018 to 2024; chloride levels were consistenly at levels appropriate for healthy aquatic communities like plants, fish, and bugs, confirmed by good fish and bug scores. In 2026 elevated temperatures were documented on Tyler Forks, but it was determined that this impairment was due to natural, irreversible conditions, and the water was placed in Category 5C. Pollutant
Unknown Pollutant
Listed For
Fish and Aquatic Life
Impairments
Elevated Water Temperature
Current Use
Unsupported Aquatic Life
Listing Status
Proposed for List
Attainable Use
Coldwater - stocked, reproduction
Priority
Low
Designated Use
Coldwater - stocked, reproduction
303(d) ID
2026-86
Listing Date
4/1/2026