Understanding DUI Laws in Utah Driving under the influence is treated with utmost seriousness in Utah, where some of the nation’s strictest laws aim to deter impaired driving. The Utah DUI Penalties are designed to reflect the severity of the offense, with consequences escalating based on the number of prior convictions and specific circumstances. A first-time offense is typically classified as a Class B misdemeanor, carrying a minimum of 48 hours in jail or 48 hours of community service, a fine of at least $1,310, and a 120-day driver’s license suspension. For drivers with a blood alcohol concentration of 0.16% or higher, an ignition interlock device is mandatory for 18 months. Utah’s legal blood alcohol limit is 0.05%, lower than the 0.08% standard in most states, reflecting the state’s zero-tolerance approach. For drivers under 21, a “not-a-drop” policy means any detectable alcohol can result in a DUI charge, with license suspension lasting up to six months or until age 21....