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

Select Another Location:

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
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WaterbodySpeciesStatusWaterbody ID Code (WBIC)Details
Ashland County (2)
Madeline Island - Airport Phragmites (non-native)Verified and Vouchered  Details
Potter Lake Banded Mystery SnailVerified and Vouchered2917200 Details
Brown County (3)
1188 Nova Ln Green Bay, WI 54304 Japanese knotweed (Fallopia japonica)Verified  Details
2526 Serene Ct De Pere, WI 54115Phragmites (non-native)Verified  Details
4128 Matuszak Ct, Green Bay 54313Yellow IrisVerified  Details
Burnett County (3)
Bass Lake Chinese Mystery SnailVerified2451200 Details
Big Bear Lake Yellow IrisVerified2705700 Details
Loon Lake Banded Mystery SnailVerified2673500 Details
Calumet County (4)
J. Knotweed Firelane 4Japanese knotweed (Fallopia japonica)Verified  Details
Lake WinnebagoSpiny WaterfleaVerified131100 Details
PL Boot LakePurple LoosestrifeVerified77600 Details
Sherwood Roadside Ditch Hwy 55/114Purple LoosestrifeVerified  Details
Crawford County (5)
Buck Creek at STH 35Purple LoosestrifeVerified  Details
Mississippi River -- Gordons Bay LandingPurple LoosestrifeVerified  Details
Sugar Creek ParkPurple LoosestrifeVerified  Details
US-61 - 0.3 M North of County Hwy H
Winneshiek Lake - Cold Springs LandingPurple LoosestrifeVerified724600 Details
Dane County (8)
Fryes FeederNew Zealand MudsnailVerified886800 Details
Starkweather Creek at Zeier RoadJava Waterdrop / Vietnamese Water CeleryVerified and Vouchered  Details
Sweet LakeCurly-Leaf PondweedVerified780400 Details
US HWY 12 - 500 M East of Whitney WayJapanese knotweed (Fallopia japonica)Verified  Details
Warner Park LagoonChinese Mystery SnailVerified5034956 Details
Wingra Creek at Gardner MarshChinese Mystery SnailVerified804700 Details
Wingra Creek at Gardner MarshEurasian Water-MilfoilVerified804700 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].