Lakes & Rivers with AIS

Douglas County Lakes & Rivers with AIS (Aquatic Invasive Species)

Waterbody Name

Invasive Species

Amnicon Lake

Curly-Leaf Pondweed, Purple Loosestrife

Amnicon River

Round Goby, Ruffe, Sea Lamprey

Bois Brule River

Alewife, Ruffe, Threespine Stickleback, Watercress

Cranberry Lake

Eurasian Watermilfoil

Crystal Lake

Freshwater Jellyfish, Chinese Mystery Snails (not confirmed)

Dowling Lake

Curly-Leaf Pondweed

Eau Claire River

Purple Loosestrife, Rusty Crayfish

Lake Minnesuing

Rusty Crayfish

Lake Nebagamon

Chinese Mystery Snail, Japanese Knotweed, Purple Loosestrife, Rusty Crayfish

Lake Superior

Alewife, Purple Loosestrife, Rainbow Smelt, Spiny Waterflea, Zebra Mussel, Quagga Mussel, Ruffe, Round Goby, Threespine Stickleback, New Zealand Mudsnail, Spiny Waterflea, Eurasian Watermilfoil, Curly-Leaf Pondweed, VHS, Yellow Iris, Watercress

Lower Eau Claire Lake

Purple Loosestrife, Rusty Crayfish

Middle River


Minong Flowage

Curly-Leaf Pondweed, Eurasian Watermilfoil, Rusty Crayfish

Mud Lake

Zebra Mussel (Mud Lake WBID: 3000116)

Red Lake

Freshwater Jellyfish

Saint Croix Flowage

Chinese and Japanese Mystery Snails, Curly-Leaf Pondweed, Eurasian Watermilfoil, Purple Loosestrife

Saint Croix River

Chinese and Japanese Mystery Snails, Rusty Crayfish, Curly-Leaf Pondweed, Eurasian Watermilfoil

Saint Louis River

Curly-Leaf Pondweed (not confirmed), Zebra Mussel, Alewife, Round Goby, Threespine Stickleback, New Zealand Mudsnail

Sauntrys Pocket

Chinese Mystery Snail

Superior Bay

Curly-Leaf Pondweed, Eurasian Watermilfoil

Upper Saint Croix Lake

Banded Mystery Snail, Chinese Mystery Snail, Curly-Leaf Pondweed, Purple Loosestrife, Rusty Crayfish, Yellow Iris, Japanese Knotweed