Contact information
For information on Lakes in Wisconsin, contact:
Wisconsin DNR Lakes
Division of Water
Bureau of Water Quality
Aquatic Invasive Species Contacts

Eurasian Water-Milfoil

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Total Locations: 23
Total Lakes and Rivers: 22 *

Disclaimer: Aquatic invasive species (AIS) records are assigned statuses of "verified", "observed", or "no longer observed" based on AIS Status Guidance. In general, "verified" populations are established and have been verified by a taxonomic expert. Populations with the "observed" status have not been verified by a taxonomic expert or do not have established populations. Populations with the "no longer observed" status include populations where a reproducing population did not establish. Our inventories are not necessarily exhaustive so it is important to report occurrences. To report new discoveries visit: See the Aquatic Invasive Species Guidance for information on how statuses are assigned. Personally identifiable information on data collection forms may be provided to requesters to the extent required by Wisconsin's Open Records Law [ss. 19.31-19.39, Wis. Stats.].

By Waterbody | By Species | By Year | Open In Excel
WaterbodyStatusWaterbody ID Code (WBIC)Year First FoundDetails
Eurasian Water-Milfoil (23)
Barber LakeVerified23823002021 Details
Big Sissabagama Lake Verified and Vouchered23935002022 Details
Callahan LakeVerified and Vouchered24347002005 Details
Chippewa Lake (above CTH B)Verified24145002006 Details
Clear LakeVerified and Vouchered18413001999 Details
Connors LakeVerified and Vouchered22751002002 Details
Hayward LakeVerified27255002011 Details
Lac Coute OreillesVerified and Vouchered23908002017 Details
Lake Chippewa (Chippewa Fl)Verified and Vouchered23997001991 Details
Little Lac Courte OreillesVerified and Vouchered23905002015 Details
Little Round LakeVerified and Vouchered23955001999 Details
Lost Land LakeVerified and Vouchered24186002013 Details
Mud LakeVerified and Vouchered23822002005 Details
Mud LakeVerified and Vouchered24348002005 Details
North Fork Chief River (From Chippewa Fl. to Callahan Lake)Verified and Vouchered24340002006 Details
Osprey LakeVerified and Vouchered23951002005 Details
Radisson FlowageVerified and Vouchered23974002003 Details
Round Lake (Big Round)Verified and Vouchered23956001993 Details
Tiger Cat FlowageNo Longer Observed24350002013 Details
Whitefish LakeVerified and Vouchered23920002008 Details
Hybrid Eurasian / Northern Water-Milfoil (3)
HaywardVerified27255002012 Details
Lost Land LakeVerified24186002014 Details
Round Lake Verified and Vouchered23956002022 Details

* Total Lakes and Rivers = total unique Waterbody ID Codes (WBICs). If a waterbody, such as a small pond not in the DNR 24 K Hydrolayer, doesn't have a WBIC, it isn't currently counted in the total.

** Purple Loosestrife - DNR has only a partial list of locations. For more extensive data, visit the Great Lakes Indian and Fish Wildlife Commission (GLIFWC) website [exit DNR].

** Fish species - This web page only has a partial list of locations. For more extensive data, visit the Wisconsin Department of Natural Resources Map of Distribution of WI Fish Species [exit DNR].