Contact information
For information on Lakes in Wisconsin, contact:
DNR SWIMS
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: https://dnr.wisconsin.gov/topic/Invasives/report.html. 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
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WaterbodyStatusWaterbody ID Code (WBIC)CountyYear First FoundDetails
Hybrid Eurasian / Northern Water-Milfoil (182)
Alpine LakeVerified and Vouchered245650Waushara1992 Details
Arbutus LakeVerified181400Forest2022 Details
Arrowhead LakeVerified1541500Vilas2010 Details
Bahr LakeVerified325300Shawano2019 Details
Bark LakeVerified and Vouchered828600Washington2015 Details
Bass LakeVerified584200Florence2018 Details
Berry LakeVerified418300Menominee, Oconto2010 Details
Beulah Lake (Beaulieu)Verified and Vouchered766600Walworth1987 Details
Big HillsVerified182100Waushara2013 Details
Blacksmith LakeVerified340500Menominee2015 Details
Blue LakeVerified and Vouchered1538600Oneida2020 Details
Blue Spring LakeVerified819800Jefferson2014 Details
Brekke LakeVerified183000Waupaca2011 Details
Browns LakeVerified and Vouchered750300Racine1988 Details
Buffalo LakeVerified and Vouchered168000Marquette2015 Details
Bughs LakeVerified102100Waushara2010 Details
Camelot LakeVerified and Vouchered5022387Adams2014 Details
Camp LakeVerified747100Kenosha2014 Details
Carstens LakeVerified66800Manitowoc2012 Details
Cedar LakeVerified283800Waupaca2014 Details
Cedar LakeVerified45100Manitowoc2022 Details
Chalet LakeVerified254700Waupaca2014 Details
Chalk Hill FlowageVerified634500Marinette2013 Details
Coleman LakeVerified632800Marinette2018 Details
Crane LakeVerified388500Forest2009 Details
Crooked LakeVerified102600Adams2013 Details
Crystal LakeVerified and Vouchered157300Marquette2004 Details
Deep LakeVerified102800Adams2008 Details
Delavan LakeVerified793600Walworth2014 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].