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

Bohemian knotweed (Polygonum bohemicum)

Select Another Location:

Total Locations: 21
Total Lakes and Rivers: 2 *

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
WaterbodyStatusWaterbody ID Code (WBIC)CountyDetails
2023 (2)
Newburg residence along MKE RiverVerified15000Washington Details
S. of Main St. & E. of W. 12th Ave Verified and Vouchered Ashland Details
2022 (8)
Cty Rd C. ROWVerified and Vouchered Polk Details
Cty Rd G. ROWVerified and Vouchered Polk Details
Cty Rd M N of Horse CreekVerified and Vouchered Polk Details
Cty Rd O ROWVerified and Vouchered Polk Details
Cty Rd WVerified and Vouchered Polk Details
Cty Rd W ROWVerified and Vouchered Polk Details
Frederic Storage SiteVerified and Vouchered Polk Details
Hybrid KnotweedVerified Walworth Details
2021 (3)
County Hwy MM
Huson ParkVerified Sheboygan Details
Mill CreekVerified Sheboygan Details
2019 (7)
Campus Drive near Paunack PlaceVerified Dane Details
Fish Hatchery Road across from WalgreensVerified Dane Details
Hybrid KnotweedVerified Waukesha Details
Lake Wingra Wetland Area off Edgewood DriveVerified Dane Details
NE corner of US-12 and WI-59Verified Walworth Details
River Road - Wisconsin DellsVerified Adams Details
Veterans Lane - 150 Meters S of Mill Pond AccessVerified Jefferson Details
Year Not Specified (1)
203rd St ROWVerified and Vouchered Polk Details

* 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].