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

Lakes and Rivers With Invasives

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Total Locations: 92
Total Lakes and Rivers: 42 *

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
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WaterbodyStatusWaterbody ID Code (WBIC)Year First FoundDetails
Banded Mystery Snail (6)
Bullhead LakeVerified and Vouchered683002009 Details
Cedar LakeVerified and Vouchered451002008 Details
English LakeVerified681002012 Details
Pigeon LakeVerified and Vouchered640002008 Details
Spring LakeVerified and Vouchered637002009 Details
Tuma LakeVerified and Vouchered879002014 Details
Curly-Leaf Pondweed (12)
Bullhead LakeVerified and Vouchered683002003 Details
Carstens Lake (Carsten)Verified668001993 Details
English LakeVerified and Vouchered681002007 Details
Gass LakeVerified and Vouchered671002016 Details
Harpt LakeVerified846002014 Details
Hartlaub LakeVerified and Vouchered672002010 Details
Horseshoe LakeVerified642002005 Details
Long Lake (Big Long)Verified775001988 Details
Pigeon LakeVerified640002005 Details
Rockville FlowageVerified and Vouchered584002015 Details
West Twin RiverVerified and Vouchered870002011 Details
Wilke LakeVerified580001993 Details
Eurasian Water-Milfoil (25)
Bullhead LakeVerified and Vouchered683002005 Details
Carstens Lake (Carsten)Verified and Vouchered668001993 Details
Cedar LakeVerified and Vouchered451001993 Details
English LakeVerified and Vouchered681002009 Details
Harpt Lake (Herman)Verified and Vouchered846001994 Details
Hartlaub LakeVerified672002009 Details
Horseshoe LakeVerified and Vouchered642001971 Details
Kiel MillpondVerified55601132014 Details
Lake MichiganVerified and Vouchered201978 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].