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: 95
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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WaterbodySpeciesStatusWaterbody ID Code (WBIC)Year First FoundDetails
Black CreekRusty CrayfishVerified88300  Details
Branch RiverRusty CrayfishVerified713002012 Details
Branch River at N Union Rd (2)Yellow IrisVerified and Vouchered713002015 Details
Bullhead LakeCurly-Leaf PondweedVerified and Vouchered683002003 Details
Bullhead LakeBanded Mystery SnailVerified and Vouchered683002009 Details
Bullhead LakeEurasian Water-MilfoilVerified and Vouchered683002005 Details
Carstens LakeHybrid Eurasian / Northern Water-MilfoilVerified668002012 Details
Carstens Lake - YIYellow IrisVerified 2021 Details
Carstens Lake (Carsten)Curly-Leaf PondweedVerified668001993 Details
Carstens Lake (Carsten)Eurasian Water-MilfoilVerified and Vouchered668001993 Details
Cedar LakeEurasian Water-MilfoilVerified and Vouchered451001993 Details
Cedar LakeZebra MusselVerified451002001 Details
Cedar LakeBanded Mystery SnailVerified and Vouchered451002008 Details
Cedar LakeYellow IrisVerified451002014 Details
Collins Marsh and Cty Rd JJPhragmites (non-native)Verified 2016 Details
Devils RiverRusty CrayfishVerified899002019 Details
E. Mueller Rd (Station #10053180) Pop. #383 Giant hogweed (Heracleum mantegazzianum)Verified 2009 Details
East side of Long Lake Rd 900 ft south of W Hillcrest RdPhragmites (non-native)Verified 2021 Details
East Twin RiverRusty CrayfishVerified84000  Details
East Twin RiverZebra MusselVerified870002019 Details
East Twin RIver - 27th St MarinaPurple LoosestrifeVerified840002020 Details
EnglishHybrid Eurasian / Northern Water-MilfoilVerified681002011 Details
English LakeBanded Mystery SnailVerified681002012 Details
English LakeCurly-Leaf PondweedVerified and Vouchered681002007 Details
English LakeEurasian Water-MilfoilVerified and Vouchered681002009 Details
Francis CreekRusty CrayfishVerified87600  Details
Gass LakeCurly-Leaf PondweedVerified and Vouchered671002016 Details
Harpt LakeCurly-Leaf PondweedVerified846002014 Details
Harpt Lake (Herman)Eurasian Water-MilfoilVerified and Vouchered846001994 Details
Hartlaub LakeHybrid Eurasian / Northern Water-MilfoilVerified672002011 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].