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 - 2021 Findings

Select Another Location:

Total Locations: 337
Total Lakes and Rivers: 150 *

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
2021 (337)
1/2 mile east of Fireside Rd around pondPhragmites (non-native)Verified Oconto Details
140th AvePurple LoosestrifeVerified Polk Details
15 Meters Upstream Hwy B- Station #2Purple LoosestrifeVerified Douglas Details
190th street just north of Swede lake RDPurple LoosestrifeVerified Polk Details
500 ft southeast of Carriveau LnPhragmites (non-native)No Longer Observed Oconto Details
6590 Aspen Dr. Sobieski, WI 54171Yellow IrisVerified Oconto Details
Alexander LakePurple LoosestrifeVerified1494600Lincoln Details
Allen Creek - Upstream Of English Settlement RoadPhragmites (non-native)Verified Green Details
Allen Creek (813300) N of Star School RoadCurly-Leaf PondweedVerified Jefferson Details
Allen Creek (813300) N of Star School RoadRusty CrayfishVerified and Vouchered Jefferson Details
Arbutus LakeEurasian Water-MilfoilVerified181400Forest Details
Army LakeChinese Mystery SnailVerified   Details
Army LakeSpiny NaiadVerified and Vouchered   Details
Army LakeZebra MusselVerified   Details
Around pond west of service ramp from HWY 45 to HWY 151Phragmites (non-native)Verified and Vouchered Fond du Lac Details
Ashippun Lake - PLPurple LoosestrifeVerified854300Waukesha Details
Assembly Rd..2 E of N Fork Trade RiverPurple LoosestrifeVerified Burnett Details
Auburn Lake CreekEurasian Water-MilfoilVerified41600Fond du Lac Details
Backyard pond Parcel #024303403432BPhragmites (non-native)Verified Oconto Details
Badger Mill Creek GreenwayPurple LoosestrifeVerified888100Dane Details
Badger Spray @Raymond RdPoison HemlockVerified Dane Details
Bakkens Pond - LandingYellow IrisVerified Sauk Details
Baraboo River -- Access Near Lake RedstonePurple LoosestrifeVerified Sauk Details
Barber LakeEurasian Water-MilfoilVerified2382300Sawyer Details
Bark BayQueen of the meadow (Filipendula ulmaria)Verified Bayfield Details
Bass Lake -- Picnic Ground Boat RampRusty CrayfishVerified417900Oconto Details
Basset CreekCurly-Leaf PondweedVerified Kenosha Details
Bay N end of Old Hwy 70Purple LoosestrifeVerified1542400Oneida Details
Bay RoadEuropean FrogbitVerified Oconto 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].