In Austin, Travis County, and the rest of Texas, any driver caught with a blood alcohol content (BAC) of 0.08% or higher can be charged with driving while intoxicated. BAC is a measure of what percent of your blood is made up of alcohol. The number of drinks that will put you at a BAC of 0.08% depends on a number of factors, including the strength of the drinks, the time passed since consuming, your gender, your weight, and your tolerance.