Manitowoc County, Wisconsin
TK02
84600
32.20
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
Harpt Lake was evaluated for phosphorus and algae every two years between 2016 and 2024. Phosphorus levels were found to be too high.Pollutant
Total Phosphorus
Listed For
Recreation
Impairments
High Phosphorus Levels, Excess Algal Growth
Current Use
Restricted Recreation
Listing Status
TMDL Approved
Attainable Use
Recreation
Priority
Not Applicable
Designated Use
Recreation
303(d) ID
2016-200
Listing Date
4/1/2016
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new total phosphorus sample data overwhelmingly exceeded 2018 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use and chlorophyll data did not exceed REC and FAL thresholds.
Date
7/11/2017
Impaired Water Notes
This water was assessed during the 2016 listing cycle; total phosphorus sample data overwhelmingly exceeded 2016 WisCALM listing thresholds for the Recreation use, however chlorophyll data did not exceed REC thresholds. Total phosphorus and chlorophyll data did not exceed Fish and Aquatic Life thresholds.
Date
8/2/2015
Impaired Water Notes
This water was assessed during the 2020 listing cycle; new total phosphorus sample data overwhelmingly exceeded 2020 WisCALM listing thresholds for the Recreation use and Aquatic Life use. Based on the most updated information, no change in existing impaired waters listing is needed.
Date
8/2/2019
Impaired Water Notes
This water was assessed during the 2022 listing cycle; new total phosphorus sample data overwhelmingly exceeded 2022 WisCALM listing thresholds for the Recreation use and Aquatic Life use. Based on the most updated information, no change in existing impaired waters listing is needed.
Date
5/25/2021