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

Hybrid Eurasian / Northern Water-Milfoil

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Total Locations: 182
Total Lakes and Rivers: 231 *

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 County | By Waterbody | By Species | By Year | Open In Excel
Page 1 of 8
WaterbodyStatusWaterbody ID Code (WBIC)Year First FoundDetails
Adams County (9)
Camelot LakeVerified and Vouchered50223872014 Details
Crooked LakeVerified1026002013 Details
Deep LakeVerified1028002008 Details
Fawn LakeVerified and Vouchered13013002012 Details
Goose LakeVerified and Vouchered1036001995 Details
Jordan Lake (Long)Verified1040002010 Details
Parker LakeVerified1065002010 Details
Patrick LakeVerified and Vouchered1066002010 Details
Peppermill LakeVerified1787002014 Details
Barron County (2)
Horseshoe LakeVerified and Vouchered26301002006 Details
Rice Lake Verified21039002018 Details
Bayfield County (1)
Namekagon Lake 2732600Verified27353002016 Details
Brown County (1)
Lake LeoneVerified55913952013 Details
Calumet County (1)
Lake WinnebagoVerified1311002017 Details
Chippewa County (2)
Holcombe FlowageVerified21870002012 Details
Lake HallieVerified and Vouchered21502002005 Details
Dane County (3)
Fish LakeVerified and Vouchered9851001967 Details
Mud LakeVerified and Vouchered10065002004 Details
Wingra LakeVerified and Vouchered8050002005 Details
Dodge County (1)
Fox LakeVerified8358002014 Details
Florence County (9)
Bass LakeVerified5842002018 Details
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* 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].