Impaired Water - Twin Valley Lake (Twin Valley Lake)
Iowa County, Wisconsin
LW15
1245800
135.92
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This water was evaluated for phopshorus and alage in the 2014, 2016, and 2018 cycles; elevated algae levels were found in the 2016 cycle, prompting listing for excess algal growth. The elevated levels were confirmed in the 2018 cycle.
Listing Details
Pollutant
Unknown Pollutant
Listed For
Recreation
Impairments
Excess Algal Growth
Current Use
Restricted Recreation
Listing Status
303d Listed
Attainable Use
Recreation
Priority
Low
Designated Use
Recreation
303(d) ID
2016-224
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.
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