New Jersey DUI or DWI laws are very strict and complex to punish those who break the law. A person can be convicted of a DUI (driving under the influence) if their blood alcohol concentration (BAC) is greater than or equal to .08%.  A DUI, or driving while under the influence, is a drunk driving conviction is above the state legal alcohol limit, rendering the driver legally impaired. Legal limit in New Jersey: Standard, non-commercial drivers: .08% BAC Commercial drivers: .04% BAC Drivers under 21: .02% BAC