The penalties for a DUI conviction in Pennsylvania vary, depending on the severity of the infraction. Generally speaking, first-time DUIs are misdemeanors, and it depends on whether there is an aggravating circumstance. These may include having a blood alcohol content of 0.10% or higher; driving with children under 18 years old in your car, notably younger than 14 years old; crashing into property other than another car, or committing another violation at the same time, such as speeding over 30 miles per hour over the speed limit. If you commit any combination of these offenses, you can be charged with an aggravated DUI and will have to face more severe charges, including mandatory jail time.