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

Lakes and Rivers With Invasives

Select Another Location:

Total Locations: 452
Total Lakes and Rivers: 217 *

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 Waterbody | By Species | By Year | Open In Excel
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WaterbodySpeciesStatusWaterbody ID Code (WBIC)Year First FoundDetails
Adams LakeBanded Mystery SnailVerified9671002005 Details
Alder LakeCurly-Leaf PondweedVerified and Vouchered23296002025 Details
Alder LakeRusty CrayfishVerified23296001975 Details
Alder LakeBanded Mystery SnailVerified and Vouchered23296002013 Details
Alder LakeChinese Mystery SnailVerified and Vouchered23296002007 Details
Aldridge LakeChinese Mystery SnailVerified9674002013 Details
Allequash CreekRusty CrayfishVerified23321002006 Details
Allequash LakeChinese Mystery SnailVerified and Vouchered23324002004 Details
Allequash LakeBanded Mystery SnailVerified23324002015 Details
Allequash LakePurple LoosestrifeVerified23324002014 Details
Alma LakeChinese Mystery SnailVerified and Vouchered9679002014 Details
Amik LakeChinese Mystery SnailVerified and Vouchered22686002019 Details
Amik Lake Rusty CrayfishVerified22686002019 Details
Anabelle LakePurple LoosestrifeVerified and Vouchered29538002019 Details
Anderson LakeRusty CrayfishVerified9685002010 Details
Anderson LakeRainbow SmeltVerified9685002000 Details
Anne LakeRusty CrayfishVerified27545001975 Details
Anvil LakeRusty CrayfishVerified9688001982 Details
Anvil LakeEurasian Water-MilfoilVerified and Vouchered9688002012 Details
Anvil LakeBanded Mystery SnailVerified9688002006 Details
Anvil LakeCurly-Leaf PondweedVerified and Vouchered9688002013 Details
Anvil LakeChinese Mystery SnailVerified9688002006 Details
Armour Lake Yellow IrisVerified and Vouchered29532002020 Details
Arrowhead LakeEurasian Water-MilfoilVerified and Vouchered15415002005 Details
Arrowhead LakeHybrid Eurasian / Northern Water-MilfoilVerified15415002010 Details
Arrowhead LakeRusty CrayfishVerified15415001998 Details
Arrowhead LakeChinese Mystery SnailVerified15415002006 Details
Averill Lake (Mud)Rusty CrayfishVerified2956700  Details
Baker LakeChinese Mystery SnailVerified and Vouchered16264002010 Details
Ballard LakeBanded Mystery SnailVerified23407002010 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].