What is Blood Alcohol Concentration (BAC)? BAC refers to the percentage of alcohol in a person's bloodstream. A BAC of 0.10% means that an individual's bloodstream contains one part alcohol for every ...

If you choose to drink, we recommend gradually reaching a blood alcohol concentration (BAC) of no more than .06%. As the chart below indicates, a BAC between .01% and .06% is typically associated with ...

Research shows that impairment begins long before a person reaches the blood alcohol concentration necessary to be guilty of driving under the influence. In all 50 states, the legal limit for drunk ...