What is the legal limit for blood alcohol concentration (BAC) for drivers over 21 in most states?

The legal limit for blood alcohol concentration (BAC) for drivers over 21 in most states is 0.08%. This limit is established to ensure safe driving and reduce the risks associated with impaired driving, which can significantly increase the likelihood of accidents, injuries, and fatalities on the road.

When a driver's BAC reaches 0.08%, their ability to operate a vehicle safely is considered impaired, leading to difficulties in coordination, judgment, and reaction times. As a result, law enforcement agencies and state laws have set this standard to protect both the individual and the public.

Other BAC levels, such as 0.05%, 0.02%, and 0.10%, may reflect varying degrees of impairment, but they do not represent the legal limit established for drivers over 21. Some states may have stricter regulations or different limits for commercial drivers or underage drinkers, but 0.08% remains the widely recognized benchmark for adults.