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 - 2021 Findings

Select Another Location:

Total Locations: 337
Total Lakes and Rivers: 150 *

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 13
WaterbodyStatusWaterbody ID Code (WBIC)CountyDetails
Asiatic Clam (Corbicula) (1)
Turtle CreekVerified790300Rock, Walworth Details
Banded Mystery Snail (1)
Middle McKenzieVerified2706500Burnett, Washburn Details
Bohemian knotweed (Polygonum bohemicum) (3)
County Hwy MM
Huson ParkVerified Sheboygan Details
Mill CreekVerified Sheboygan Details
Brittle Waternymph (1)
Mississippi Pool 8Verified and Vouchered721000Vernon Details
Butterfly dock (1)
Harvey E Schmidt Park - City of MadisonVerified Dane Details
Chinese Mystery Snail (10)
Army LakeVerified   Details
Black Otter LakeVerified315600Outagamie Details
Hooker LakeVerified738400Kenosha Details
Lily LakeVerified2475300Burnett Details
Milwaukee River CMSVerified15000Milwaukee, Ozaukee Details
Montgomery LakeVerified738200Kenosha Details
No Mans LakeVerified2486300Burnett, Washburn Details
North Spirit LakeVerified1515200Price, Taylor Details
Robie LakeVerified2671500Burnett Details
Starkweather Creek Verified805100Dane Details
Curly-Leaf Pondweed (18)
Allen Creek (813300) N of Star School RoadVerified Jefferson Details
Basset CreekVerified Kenosha Details
Dorn Creek at Cth M BridgeVerified Dane Details
Duck Creek at Straude RoadVerified Jefferson Details
Dueholm FlowageVerified2637200Burnett Details
East Branch Milwaukee RiverVerified Fond du Lac 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].