BAC is measured in grams of alcohol per 100 milliliters of blood. A BAC of .01 indicates .01 grams of alcohol per 100 milliliters of blood. As of July 2004, all 50 states and the District of Columbia have passed legislation establishing a driver with a BAC of .08 to be legally intoxicated. Additionally, 48 states and the District of Columbia have laws and penalties for those who drive with elevated or “high” BAC levels.

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