What is the implication of a BAC reading below 0.08% for a driver aged 21 and over?

A Blood Alcohol Concentration (BAC) reading below 0.08% for a driver aged 21 and over is generally considered to indicate that the driver is not legally impaired under most state laws. In many jurisdictions, including Georgia, this BAC threshold is the level at which a driver is presumed to be impaired. When a driver's BAC is under this limit, it suggests that they are operating the vehicle within the legal limits set by law regarding alcohol consumption.

This means that, legally, a BAC reading below 0.08% serves as a defense against being charged with driving under the influence (DUI) or impaired driving. However, it's essential to note that even at lower BAC levels, a driver could still be charged with DUI if other evidence suggests impairment, such as erratic driving behavior or failure to perform field sobriety tests. While the reading below 0.08% is often seen as a sign of being "sober," it does not completely eliminate the possibility of a DUI charge based on other contributing factors.