The Minnesota Department of Natural Resources has confirmed the presence of zebra mussels in Grove Lake, near the town of Grove Lake in Pope County, and Charlotte Lake, near Long Prairie in Todd County.

A lake property owner contacted the DNR after finding a zebra mussel attached to a native mussel in Grove Lake. A DNR invasive species specialist later found another zebra mussel at the city park access, about one-half mile from the location of the initial discovery.