<P> An operator of a motor vehicle is considered under the influence of alcohol if a chemical screening test shows a blood - alcohol content of 0.08 percent or higher . No other evidence ( such as Field Sobriety tests ) need be presented to the court to obtain a DUI ( driving under the influence ) conviction . A driver testing 0.15 percent or more over the legal limit of 0.08 percent faces more severe penalties for enhanced BAC . When under the age of 21 , a driver in Texas must not test positive for any blood - alcohol content ( BAC ) and may be charged with DUI even if the amount tested is under 0.08 percent . </P>
in texas what is the minimum blood alcohol concentration level in order to be considered intoxicated
0.08 percent or higher