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

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Total Locations: 15
Total Lakes and Rivers: 38 *

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
WaterbodyStatusWaterbody ID Code (WBIC)Year First FoundDetails
Brown County (1)
Duck CreekNo Longer Observed55491362002 Details
Buffalo County (2)
Lizzie Pauls PondNo Longer Observed50214832011 Details
Mississippi River - Pool 5No Longer Observed7210002011 Details
Chippewa County (1)
O'Neil Creek No Longer Observed55909392005 Details
Dane County (2)
Lake MendotaVerified and Vouchered8054002015 Details
Orchid Heights Park, Detention PondsNo Longer Observed 2010 Details
Fond du Lac County (1)
Unnamed Pond/Channel in Lakeside Park - Near Lake WinnebagoNo Longer Observed55624452010 Details
Jefferson County (1)
Private Pond - WaterlooVerified and Vouchered 2021 Details
Kenosha County (1)
Center LakeNo Longer Observed 2005 Details
La Crosse County (2)
Lake OnalaskaVerified16767002015 Details
Vietnam Veterans Pond - Chad Erickson Memorial ParkVerified16494502015 Details
Milwaukee County (2)
Jacobus Park PondNo Longer Observed98002008 Details
Private Pond - Wynona DriveVerified and Vouchered 2020 Details
Outagamie County (1)
Duck CreekNo Longer Observed55491362002 Details
Portage County (1)
Springville PondNo Longer Observed14023002009 Details
Washington County (1)
Jefferson DitchNo Longer Observed50340832011 Details

* 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].