In Pennsylvania, a driver who is at least 21 years old may be charged with driving under the influence (DUI) if his or her blood alcohol concentration is ______ or higher.

Explanation

In Pennsylvania, a driver whose blood alcohol concentration is 0.08% or higher can be charged with driving under the influence (DUI). A driver under 21 years of age can be charged with DUI if his or her blood alcohol concentration is 0.02% or higher. Most people will reach a level of 0.02% or higher by consuming just one alcoholic drink.