Impaired Water - Lake Thirty (Lake Thirty)
Barron County, Wisconsin
LC09
2099900
75.50
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
Assessments during the 2020 listing cycle show total phosphorus levels too high for health aquatic communities, like plants, fish, and bugs. Chlorophyll and chloride data did not indicate impairment. The 2022 cycle evaluation of aquatic plant data indicated healthy communities. This lake is covered by a watershed plan: A Water Quality Strategy for the Land and Waters of the Red Cedar River Basin Nine Key Plan (2026). New water quality data reviewed in the 2024 cycle indicated no additional pollutants.
Listing Details
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Impairment Unknown
Current Use
Unsupported Aquatic Life
Listing Status
303d Listed
Attainable Use
Default - Fish and Aquatic Life
Priority
Low
Designated Use
Default - Fish and Aquatic Life
303(d) ID
2020-029
Listing Date
4/1/2020
Impaired Water Notes
This water was assessed during the 2020 listing cycle; total phosphorus sample data exceeded 2020 WisCALM listing thresholds; however chlorophyll sample data did not exceed 2020 WisCALM listing thresholds for Recreation use and Aquatic Life use. Chloride data also did not exceed 2020 WisCALM listing thresholds.
Date
7/29/2019

Impaired Water Notes
This lake is covered by the following watershed plan and was classified as Category 5W as a result: A Water Quality Strategy for the Land and Waters of the Red Cedar River Basin Nine Key Plan (2026).
Date
8/15/2019