What is the legal blood alcohol concentration (BAC) limit for drivers aged 21 and over?

The legal blood alcohol concentration (BAC) limit for drivers aged 21 and over is established at 0.08%. This standard is recognized across many states in the U.S. as a threshold that indicates an impaired ability to operate a vehicle safely. At this level, individuals may experience decreased coordination, impaired judgment, and reduced reaction times, which can significantly increase the likelihood of accidents.

Maintaining a BAC below this limit is crucial for safe driving, and law enforcement agencies use this standard to enforce DUI (Driving Under the Influence) laws. Drivers should be aware that even at lower BAC levels, they can still be charged with impaired driving if their ability to operate a vehicle is compromised.