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)CountyDetails
2022 (187)
Island near 1st Bank of BaldwinPurple LoosestrifeVerified Polk Details
101th Ave. Cedar Lk inlet. ROWJapanese knotweed (Fallopia japonica)Verified and Vouchered Polk Details
1188 Nova Ln Green Bay, WI 54304 Japanese knotweed (Fallopia japonica)Verified Brown Details
2526 Serene Ct De Pere, WI 54115Phragmites (non-native)Verified Brown Details
400 Bike Trail near Unnamed 5564325Purple LoosestrifeVerified Juneau Details
4128 Matuszak Ct, Green Bay 54313Yellow IrisVerified Brown Details
504 N 5th Ave Sturgeon Bay, WI 54235Japanese knotweed (Fallopia japonica)Verified Door Details
710th Ave and 910th StPurple LoosestrifeVerified Pierce Details
765th Street PhragPhragmites (non-native)Verified Dunn Details
Alexander Lake/ WI RIver - HartwigPurple LoosestrifeVerified1179900Lincoln Details
Arbutus LakeHybrid Eurasian / Northern Water-MilfoilVerified181400Forest Details
Badger Boat LandingJapanese knotweed (Fallopia japonica)Verified Waushara Details
Balsam Lake - 120th StreetPurple LoosestrifeVerified   Details
Balsam Lake ZMZebra MusselVerified2620600Polk Details
Bark River behind old fish hatchery on Main StCurly-Leaf PondweedVerified827700Waukesha Details
Bass Lake Chinese Mystery SnailVerified2451200Burnett Details
Bay shore from Thompson Park to Dyers Slough AND Bay shore & Wetlands -South of Harbor Rd -Boat Launch to Thompson ParkEuropean FrogbitVerified20Marinette Details
Big Bear Lake Yellow IrisVerified2705700Burnett Details
Big Sissabagama Lake Eurasian Water-MilfoilVerified and Vouchered2393500Sawyer Details
Black Otter LakeFaucet SnailVerified315600Outagamie Details
Blue Lake Banded Mystery SnailVerified and Vouchered1538600Oneida Details
Blue Lake Chinese Mystery SnailVerified and Vouchered1538600Oneida Details
BMSBanded Mystery SnailVerified827500Waukesha Details
Bog next to Clear Lake boat access-S endPurple LoosestrifeVerified Rusk Details
Bohners LakeZebra MusselVerified750800Racine Details
Booth LakeAsiatic Clam (Corbicula)Verified740400Walworth Details
Booth LakeChinese Mystery SnailVerified740400Walworth Details
Bridge Lake Purple LoosestrifeVerified and Vouchered1516800Lincoln, Oneida Details
Buck Creek at STH 35Purple LoosestrifeVerified Crawford 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].