Blood Alcohol Concentration

Blood Alcohol Concentration (BAC) Limits in California

Blood Alcohol Concentration (BAC) is a measure of the amount of alcohol in the bloodstream. Having a BAC of 0.10%, for example, means that there is one gram of alcohol per 1,000 milliliters (or one liter) of blood.  


Because of the various ways alcohol can impair driving abilities, states have established strict legal limits on drivers’ blood alcohol concentration levels.


In California, the BAC limits are as follows:

Driver Type

BAC Legal Limit

Drivers age 21 or older


Truck drivers or anyone else driving a vehicle that requires a commercial driver’s license


Drivers with passengers for hire in the vehicle, as with taxis or ride share services


Drivers under age 21 or anyone who is on probation for driving under the influence (DUI)


Similar Posts