The criminal offense generally includes either driving under the influence of alcohol to the extent it impairs your physical and mental faculties, or driving while you have a blood alcohol content of .08 or greater regardless of whether the alcohol has had any effect on you.

The state of California has strict drunk driving laws for drivers under the age of 21 and repeat offenders( 0.01%) and a "no tolerance" law for drivers under the age of 18. The driver of a commercial vehicle is prohibited from driving with a 0.04% BAC or higher.