There's a recurrent rumor that bull sharks live in the Ohio River near Cincinnati. That's almost certainly not true.

Bull sharks have a higher tolerance for freshwater ... Are There Sharks in Lake Michigan? No, the state of Michigan borders several Great Lakes but there are no sharks living in Lake Michigan ...

and Lake Michigan, are exceptionally deep and too cold to support shark populations. Although there have been reports of bull sharks venturing as far as 1,000 miles upstream in the Mississippi ...