Impaired Water - Geneva Lake (Lake Geneva)
Walworth County, Wisconsin
FX03
758300
5,401.10
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
Geneva Lake was evaluated every two years between 2014 and 2024 for chloride, phosphorus, and algae; levels were appropriate for healthy aquatic communities like plants, bugs, and fish.

This water was added to the Impairment list during the 2026 cycle due to degraded aquatic vegetation.
Listing Details
Pollutant
Unknown Pollutant
Listed For
Fish and Aquatic Life
Impairments
Degraded Aquatic Vegetation
Current Use
Unsupported Aquatic Life
Listing Status
Proposed for List
Attainable Use
Default - Fish and Aquatic Life
Priority
Low
Designated Use
Default - Fish and Aquatic Life
303(d) ID
2026-25
Listing Date
4/1/2026