As of this summer the number of lakes where zebra mussels have been reported in Michigan is 45, followed by Indiana and New York each with 15, Ohio has 8, and Wiscon sin has 7. Zebra mussel veliger or adult observations have been reported from a total of 90 lakes in the 8 states bordering the Great Lakes, up from 79 a year ago. In May of this year, a newspaper in Escanaba, Michigan reported a paper company having to remove 400 cubic yards of zebra mussels from its intake in Lake Michigan at a cost of 1.4 million dollars. Lake Superior still maintains low level populations. According to TVA biologists, zebra mussel densities are again up slightly from last year in the Tennessee River.
Reproduction is still evident at all the power plants on the river.
There also appears to be plenty of veligers at the upper end of the river. Settlement was not evident until July near Chickamauga Dam. Biologists believe that the population has yet to reach its peak in the Tennessee River. The California Department of Water Resources reported three more boats brought into the state since June of 1996 carried zebra mussels. Headed for saltwater destinations, all three boats came from the Great Lakes region and had been dry-docked long enough to kill the attached zebra mussels.