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

Water Hyacinth

Select Another Location:

Total Locations: 20
Total Lakes and Rivers: 20 *

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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WaterbodyStatusWaterbody ID Code (WBIC)Year First FoundDetails
Adams County (1)
Arkdale LakeVerified13743002014 Details
Brown County (1)
East River, Fox RiverVerified1180002019 Details
Buffalo County (2)
Lizzie Pauls PondNo Longer Observed50214832011 Details
Mississippi River - Pool 5No Longer Observed7210002011 Details
Dane County (2)
Orchid Heights Park,Detention PondsNo Longer Observed 2010 Details
Pond in Orchid Heights Park in MiddletonNo Longer Observed   Details
Kenosha County (1)
Center LakeNo Longer Observed 2005 Details
La Crosse County (5)
Car Street Marsh - Black River Channel Verified and Vouchered7273002018 Details
La Plume Slough - Pool 8 Verified and Vouchered7271002018 Details
Lake OnalaskaVerified and Vouchered16767002015 Details
Pettibone Lagoon - Mississippi River Pool 8Verified and Vouchered7210002018 Details
Vietnam Veterans Pond - Chad Erickson Memorial ParkVerified16494502015 Details
Milwaukee County (1)
Jacobus Park PondNo Longer Observed98002008 Details
Outagamie County (1)
Black Otter LakeNo Longer Observed3156002010 Details
Price County (1)
Fifield Wasterwater Treatment PondNo Longer Observed55116182002 Details
Walworth County (1)
Pond (near Whitewater)Verified55784532010 Details
Washington County (1)
Jefferson DitchNo Longer Observed 2013 Details
Winnebago County (2)
Lake WinneconneVerified and Vouchered2416002015 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].