High bacteria levels close 17 beaches across Michigan High bacteria levels, some of which are being attributed to storm runoff, have closed 17 beaches across the State of Michigan. Posted at 10:58 PM, Jul 09, 2021 and last updated 2021-07-09 23:20:35-04 (WXYZ) â High bacteria levels, some of which are being attributed to storm runoff, have closed 17 beaches across the State of Michigan. They closed beaches, according to the state, include: Park Lake - Bath Township Park Lake Beach in Clinton County Crooked Lake - Independence Oaks County Park in Oakland County Ross Lake - Beaverton City Park in Gladwin County Saginaw Bay-Lake Huron - South Linwood Beach Township Park in Bay County