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

Lakes and Rivers With Invasives - 2022 Findings

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Total Locations: 187
Total Lakes and Rivers: 105 *

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
Page 1 of 8
WaterbodyStatusWaterbody ID Code (WBIC)CountyDetails
Asiatic Clam (Corbicula) (5)
Booth LakeVerified740400Walworth Details
Creek between Beasely and Orlando Lake (Waupaca Chain)Verified   Details
Oconomowoc RiverVerified848800Jefferson, Waukesha Details
Sugar River - East ChannelVerified878400Green Details
Waupaca Chain O' Lakes - Beasley and TaylorVerified   Details
Banded Mystery Snail (6)
Blue Lake Verified and Vouchered1538600Oneida Details
BMSVerified827500Waukesha Details
Little Bass Lake Verified998300Vilas Details
Loon Lake Verified2673500Burnett Details
Potter Lake Verified and Vouchered2917200Ashland Details
Wilson Park PondVerified15500Milwaukee Details
Bohemian knotweed (Polygonum bohemicum) (8)
Cty Rd C. ROWVerified and Vouchered Polk Details
Cty Rd G. ROWVerified and Vouchered Polk Details
Cty Rd M N of Horse CreekVerified and Vouchered Polk Details
Cty Rd O ROWVerified and Vouchered Polk Details
Cty Rd WVerified and Vouchered Polk Details
Cty Rd W ROWVerified and Vouchered Polk Details
Frederic Storage SiteVerified and Vouchered Polk Details
Hybrid KnotweedVerified Walworth Details
Brittle Waternymph (1)
Lake Butte des MortsVerified and Vouchered139900Winnebago Details
Butterfly dock (1)
Intersection of Blackbird Point dr. and McAfee rd.Verified and Vouchered Green Lake Details
Chinese Mystery Snail (12)
Bass Lake Verified2451200Burnett Details
Blue Lake Verified and Vouchered1538600Oneida Details
Booth LakeVerified740400Walworth 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].