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

Eurasian Water-Milfoil

Select Another Location:

Total Locations: 1078
Total Lakes and Rivers: 932 *

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 36
WaterbodyStatusWaterbody ID Code (WBIC)CountyYear First FoundDetails
Eurasian Water-Milfoil (1078)
Bass LakeVerified and Vouchered5551281Waupaca2002 Details
Adams LakeVerified and Vouchered267800Portage2015 Details
Ahnapee RiverVerified94800Kewaunee2010 Details
Alaska Lake, EastVerified and Vouchered94200Kewaunee1993 Details
Alaska Lake, WestVerified and Vouchered94300Kewaunee1993 Details
Alder Pond (T10N, R7E, S34)Verified and Vouchered967300Columbia1973 Details
Allen Cr DS of Unnamed Trib (884800) off Brooklyn RdVerified883700Rock2015 Details
Allenton MarshVerified3000225Washington1985 Details
Allouez BayVerified2751220Douglas2018 Details
Amey Pond Verified176000Adams2017 Details
Amy Belle LakeVerified  2023 Details
Anderson LakeVerified and Vouchered458700Oconto2015 Details
Anderson LakeVerified and Vouchered5700Milwaukee2013 Details
Anvil LakeVerified and Vouchered968800Vilas2012 Details
Arbutus LakeVerified181400Forest2021 Details
Archibald LakeVerified and Vouchered417400Oconto2009 Details
Arkdale Lake (Millpond)Verified and Vouchered1374300Adams1994 Details
Army Lake (East Troy)Verified and Vouchered740200Walworth1995 Details
Arrowhead LakeVerified and Vouchered1541500Vilas2005 Details
Arrowhead Lake (Manchester)Verified and Vouchered1377700Adams1992 Details
Ashippun LakeVerified and Vouchered854300Waukesha1977 Details
Ashippun River at Monterey MillpondVerified and Vouchered854100Waukesha1977 Details
Ashland - Hot Pond Verified2751220 2020 Details
Ashland Marina - Chequamegon Bay Verified2751220 2020 Details
Auburn LakeVerified and Vouchered42400Fond du Lac2008 Details
Auburn Lake CreekVerified41600Fond du Lac2021 Details
Auroraville MillpondVerified244800Waushara2013 Details
Avoca LakeVerified and Vouchered1220200Iowa1965 Details
Bagley FlowageVerified and Vouchered516800Marinette2008 Details
Page 1 of 36

* 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].