Timothy Shannon, 34, faces an open count of murder in the Dec. 29 death of 34-year-old Lee-Ann Shannon.
A trial has been scheduled for June 19-21 in Oceana County Circuit Court.
The county prosecutor's office said autopsy results released Thursday confirm she drowned.
Timothy Shannon told police his wife accidentally drowned and he tried to revive her.
The Shannons were married in 2006 and have two young children. He was a member of Hart City Council at the time of her death.