In Arizona, a driver can be convicted of driving under the influence (DUI) if their blood alcohol concentration is .08% or greater. A driving under the influence (DUI) charge is a crime committed by operating a motor vehicle while impaired by drugs or alcohol. Legal limit in Arizona: Standard, non-commercial drivers: .08% BAC Commercial drivers: .04%  BAC Drivers under 21: Zero tolerance  BAC Penalties, Fines, & Suspension Arizona DUI & DWI Penalties, Fines, & Suspension Penalty 1st offense 2nd offense 3rd offense Sentence 24 hours