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

Lakes and Rivers With Invasives

Select Another Location:

Total Locations: 91
Total Lakes and Rivers: 42 *

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.wi.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 Waterbody | By Species | By Year | Open In Excel
Page 1 of 4
WaterbodySpeciesStatusWaterbody ID Code (WBIC)Details
2020 (2)
East Twin RIver - 27th St MarinaPurple LoosestrifeVerified84000 Details
Manitowoc River - Henry Schuette ParkPurple LoosestrifeVerified  Details
2019 (6)
Devils RiverRusty CrayfishVerified89900 Details
East Twin RiverZebra MusselVerified87000 Details
Township 1099Phragmites (non-native)Verified and Vouchered  Details
Washington Rd (Station #10053220) Pop. 385 Giant hogweed (Heracleum mantegazzianum)Verified  Details
Washington Rd (Station #10053223) Pop. #388 Giant hogweed (Heracleum mantegazzianum)Verified  Details
West Twin RiverZebra MusselVerified87000 Details
2018 (1)
Spring LakePurple LoosestrifeVerified63700 Details
2017 (2)
Point CreekEurasian Water-MilfoilVerified  Details
Point CreekPurple LoosestrifeVerified  Details
2016 (2)
Collins Marsh and Cty Rd JJPhragmites (non-native)Verified  Details
Gass LakeCurly-Leaf PondweedVerified and Vouchered67100 Details
2015 (6)
Branch River at N Union Rd (2)Yellow IrisVerified and Vouchered71300 Details
Little Manitowoc - Maritime DrZebra MusselVerified82500 Details
Rockville FlowageCurly-Leaf PondweedVerified and Vouchered58400 Details
Silver Mw #99 - Across From 3224 Hwy CrRusty CrayfishVerified67300 Details
Valder Creek - N of Washington StRusty CrayfishVerified73500 Details
Valders Creek at Washington StRusty CrayfishVerified73500 Details
2014 (5)
Cedar LakeYellow IrisVerified45100 Details
Harpt LakeCurly-Leaf PondweedVerified84600 Details
Kiel MillpondEurasian Water-MilfoilVerified5560113 Details
NWSW2120N25E - SE corner section (Manitowoc CO)Phragmites (non-native)Verified and Vouchered  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].