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

Japanese knotweed (Fallopia japonica)

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Total Locations: 310
Total Lakes and Rivers: 63 *

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
Page 1 of 11
WaterbodyStatusWaterbody ID Code (WBIC)CountyDetails
2022 (5)
101th Ave. Cedar Lk inlet. ROWVerified and Vouchered Polk Details
1188 Nova Ln Green Bay, WI 54304 Verified Brown Details
504 N 5th Ave Sturgeon Bay, WI 54235Verified Door Details
Cty Rd PPVerified and Vouchered Polk Details
Riverside Blvd-Apple River ParkVerified and Vouchered   Details
2021 (23)
County MM (Station ID# 10055315)
Dairyland DriveVerified Sheboygan Details
E. of S. Main St. and N. of Washington St. Verified Portage Details
E. of South Main Street Verified Portage Details
Elm Avenue - HillsboroVerified Vernon Details
Illinois Avenue - Wisconsin DellsVerified Columbia Details
Martin Ave and N 15th stVerified Sheboygan Details
Mill Race DriveVerified Sauk Details
Pavelski Road Verified Portage Details
Scout Hall Park Verified Portage Details
SE of County Hwy-SS
South Charles StreetVerified Columbia Details
South of Washington St. - Amherst Junction Verified257400Portage Details
Tabor LakeVerified2671700Burnett Details
Unnamed 1648100 at WI-35Verified Vernon Details
Unnamed 1648200 - Brinkman Ridge RoadVerified Vernon Details
Unnamed 1648200 at County Road K
Unnamed 5030893 at WI-35Verified Vernon Details
W Broadway Street - 400 Meters W of Pine StreetVerified Sauk Details
West of South St. Verified Portage Details
Western and W main st (Elsner)Verified Sheboygan Details
WI-35 - 1M South of Hecks Point RoadVerified Vernon Details
Willow Rd and the Mullet River crossingVerified Sheboygan 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].