Pennsylvania DUI & DWI laws are different than most states. Rather than having a cut off for “intoxication,” they have a tiered system based on the level of registered blood-alcohol concentration (or BAC). The BAC level affects penalties, fines, driver’s license suspension, and additional penalties. The legal limit is still .08% for non-commercial drivers that are above the legal drinking age. However, the amount at which the BAC is calculated carries a different weight in the eyes of the law. The three tiers are: General