Eurasian Water-Milfoil Infestations

This data represents waterbodies where infestations of Eurasian Water-Milfoil are known to exist. This aquatic invasive plant may be growing in other waterbodies, but its presence has not been confirmed outside of the waters listed here. Eurasian Water-Milfoil monitoring is conducted on Wisconsin's lakes and streams in the summer months, with the infestation data compiled in the fall. The data here is current through the 2005 monitoring season.

Eurasian Water-Milfoil differs from native Northern Water-Milfoil in that it grows very quickly and can choke waterways, hampering boat access, fish passage, and water supply intakes. The plants fragment easily, and fragments attached to watercraft can take root in uninfested lakes. Boaters are encouraged to empty their ballast water and clean their watercraft and trailers after leaving an infested lake.

For more information, please visit the Invasive Species pages.