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

Lakes and Rivers With Invasives - 2020 Findings

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Total Locations: 243
Total Lakes and Rivers: 106 *

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
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WaterbodyStatusWaterbody ID Code (WBIC)CountyDetails
Banded Mystery Snail (4)
Long LakeVerified261200Waupaca Details
Lower McKenzie Lake Verified and Vouchered2706300Burnett, Washburn Details
Pioneer Creek Verified and Vouchered1623000Vilas Details
Rush Lake Verified and Vouchered   Details
Bloody Shrimp (1)
Bloody Red Shrimp Allouez BayVerified2751220  Details
Butterfly dock (2)
Butterfly Dock Superior, WIVerified Douglas Details
Rutland Branch - Headwater SpringVerified and Vouchered Dane Details
Chinese Mystery Snail (23)
Ashippun LakeVerified854300Waukesha Details
Balsam Branch Verified Polk Details
Diamond Lake Verified and Vouchered2461200Polk Details
Gabrielson LakeVerified2639200Burnett, Polk Details
Green Bay and Fox River AOCVerified117900Brown, Outagamie Details
Green LakeVerified2467200Burnett Details
Lake 26 RdVerified5003363Burnett Details
Loon Creek - Briggs Lake RdVerified Burnett Details
Loon Creek - Eagle Lake RdVerified Burnett Details
Loon Creek - Flowage Dr.Verified Burnett Details
North Branch Crawfish River - County Road D
Paulsen Lake Verified and Vouchered2488000Polk Details
Pelican River and Boyce RdVerified1567800Oneida Details
Pike Lake (Burnett Co.)Verified2489500Burnett Details
Pioneer Creek Verified and Vouchered1623000Vilas Details
Round LakeVerified2493700Burnett Details
Skinaway Lake Verified and Vouchered2497300Barron, Polk Details
Somers Lake Verified and Vouchered2665900Polk Details
Wallace LakeVerified28300Washington 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].