In Michigan a person can be convicted of operating while intoxicated (OWI) if their blood alcohol concentration (BAC) is above the legal alcohol limit of .08%. In addition, Michigan has a operating while visually impaired (OWVI) law meaning you are under the influence of both drugs and alcohol while driving. Legal limit in Michigan: Standard, non-commercial drivers: .08% BAC Commercial drivers: .04% BAC Drivers under 21: Zero tolerance Penalties, Fines, & Suspension Michigan OWI & DUI Penalties, Fines, & Suspension Penalty 1st offense 2nd offense