What is the legal blood alcohol content (BAC) limit for drivers over the age of 21?

The legal blood alcohol content (BAC) limit for drivers over the age of 21 is set at 0.08%. This threshold is recognized across many states and is established to promote road safety by reducing the risk of alcohol-related accidents. When an individual's BAC reaches this level, they are considered impaired and may face legal penalties if operating a vehicle.

This standard reflects a consensus on the point at which alcohol consumption impacts judgment, coordination, and reaction times, significantly increasing the likelihood of an accident. The BAC limit aims to deter individuals from driving under the influence and to encourage responsible drinking behaviors.

Other provided options, while representing levels of BAC, do not align with the established legal limit for drivers over 21 years old, highlighting the importance of understanding both legal standards and public safety.