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

Delavan Lake -- Access Off State Hwy 50

Location:

Delavan Lake has the following aquatic invasive species:
Banded Mystery Snail, Curly-Leaf Pondweed, Eurasian Water-Milfoil, Hybrid Eurasian / Northern Water-Milfoil, Ornamental water lilies (non-native Nymphaea sp.), Pennywort, Phragmites (non-native), Purple Loosestrife, Sacred Lotus, Zebra Mussel To Excel
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DatePrior WaterbodyCountyWBICKnown Aquatic Invasive Species
07/17/2021Geneva LakeWalworth County0Information Not Available
07/17/2021Fox Chain of Lakesx-Illinois0Information Not Available
07/17/2021Lauderdale LakeWalworth County0Information Not Available
07/17/2021Lake MichiganMilwaukee County0Information Not Available
10/03/2020Geneva LakeWalworth County758300Banded Mystery Snail, Curly-Leaf Pondweed, Eurasian Water-Milfoil, Rusty Crayfish, Starry Stonewort, Yellow Iris, Zebra Mussel
10/03/2020Lauderale LakeWalworth County0Information Not Available
10/03/2020Geneva LakeWalworth County758300Banded Mystery Snail, Curly-Leaf Pondweed, Eurasian Water-Milfoil, Rusty Crayfish, Starry Stonewort, Yellow Iris, Zebra Mussel
10/03/2020Geneva LakeWalworth County758300Banded Mystery Snail, Curly-Leaf Pondweed, Eurasian Water-Milfoil, Rusty Crayfish, Starry Stonewort, Yellow Iris, Zebra Mussel
10/03/2020Pewaukee LakeWaushara County0Information Not Available
10/03/2020Fox Chain of Lakesx-Illinois0Information Not Available
10/03/2020Kishion LakeWaukesha County0Information Not Available
10/03/2020Lake MichiganRacine County0Information Not Available
10/03/2020Geneva LakeWalworth County758300Banded Mystery Snail, Curly-Leaf Pondweed, Eurasian Water-Milfoil, Rusty Crayfish, Starry Stonewort, Yellow Iris, Zebra Mussel
09/30/2020Lauderdale LakeWalworth County0Information Not Available
09/30/2020Fox Lake Chainx-Illinois0Information Not Available
09/30/2020Geneva LakeWalworth County758300Banded Mystery Snail, Curly-Leaf Pondweed, Eurasian Water-Milfoil, Rusty Crayfish, Starry Stonewort, Yellow Iris, Zebra Mussel
09/30/2020Geneva LakeWalworth County758300Banded Mystery Snail, Curly-Leaf Pondweed, Eurasian Water-Milfoil, Rusty Crayfish, Starry Stonewort, Yellow Iris, Zebra Mussel
09/30/2020Mona LakeDane County0Information Not Available
09/30/2020Kiskinan LakeWalworth County0Information Not Available
09/30/2020Rock RiverRock County0Information Not Available
09/30/2020Browns LakeRacine County750300Asiatic Clam (Corbicula), Curly-Leaf Pondweed, Eurasian Water-Milfoil, Hybrid Eurasian / Northern Water-Milfoil, Spiny Naiad, Zebra Mussel
09/30/2018Big Cedar LakeWashington County256600 
09/29/2018Mississippi RiverLa Crosse County0Information Not Available
09/02/2018Elizabeth LakeKenosha County742800Banded Mystery Snail, Chinese Mystery Snail, Curly-Leaf Pondweed, Eurasian Water-Milfoil, Purple Loosestrife, Zebra Mussel
09/02/2018Whitewater LakeWalworth County816800Curly-Leaf Pondweed, Eurasian Water-Milfoil, Hybrid Eurasian / Northern Water-Milfoil, Yellow Iris, Zebra Mussel
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