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

Japanese knotweed (Fallopia japonica)

Select Another Location:

Total Locations: 331
Total Lakes and Rivers: 64 *

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 12
WaterbodyStatusWaterbody ID Code (WBIC)CountyYear First FoundDetails
CTH E on East Side of Eagle Spring Lake Verified Waukesha2009 Details
Hwy 151 (Brothertown) 500 Ft North County Rd H
Hwy 151 (South Brothertown) 1/2 Mile South of County Rd H
Kickapoo River - N of HWY 131Verified1182400Crawford2015 Details
101th Ave. Cedar Lk inlet. ROWVerified and Vouchered Polk2022 Details
1188 Nova Ln Green Bay, WI 54304 Verified Brown2022 Details
15m SE of East Ann St and Division StVerified889100Lafayette2018 Details
22nd Ave 1/2 mile North of County Rd YY
4th street (Oshkosh)Verified Winnebago2018 Details
504 N 5th Ave Sturgeon Bay, WI 54235Verified Door2022 Details
650th StreetVerified Dunn2023 Details
Alpine LakeVerified245650Waushara2013 Details
Amherst MillpondVerified and Vouchered268200Portage2013 Details
Apple Tree Lane 1200 ft. east of Churchill StreetVerified Waupaca2018 Details
Badfish Creek - North Riley RoadVerified799500Rock2008 Details
Badger Boat LandingVerified Waushara2022 Details
Balsam LakeVerified and Vouchered2620600Polk2014 Details
Bean City Road 1000 ft North of Burns RdVerified Waupaca2018 Details
Big Roche A Cri LakeVerified1374800Adams2012 Details
Bishop BranchVerified and Vouchered1188500Vernon2012 Details
Bishop BranchVerified Vernon2015 Details
Bishop Branch - Bishop BranchVerified5030251Vernon2015 Details
Bostwick Creek (Downstream of Co Rd O) Verified and Vouchered La Crosse2018 Details
Burns Road 250 ft East of Potters CreekVerified Waupaca2018 Details
Canal Street - 50 m from Sugar RiverVerified Dane2019 Details
Cardinal Lane in Town of UnderhillVerified  2024 Details
Cedar Creek - Near CedarburgVerified21300Ozaukee2009 Details
Cedar Creek - near end of Riveredge DrVerified21300Ozaukee2009 Details
Cedar Lake Verified and Vouchered2615100Polk2020 Details
Cemetery RD JKWVerified  2023 Details
Page 1 of 12

* 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].