Variable Milfoil is the only confirmed exotic or nuisance plant found in Lake Winnipesaukee at this time, first discovered in the lake in 1965.

The plant is native to the United States, but not native to New Hampshire. Infestations of the plant can be found in many embayed areas of the lake and small coves such as Green’s Basin, Moultonborough, Smith Cove in Gilford, Back Bay in Wolfeboro, Smalls Cove and Minge Cove in West Alton, and Paugus Bay.