What is the legal limit for blood alcohol concentration (BAC) in California for drivers over 21?

In California, the legal limit for blood alcohol concentration (BAC) for drivers over the age of 21 is set at 0.08%. This means that a driver can have a maximum BAC of 0.08% and still be considered legally fit to operate a vehicle. Above this limit, drivers are subject to penalties, including fines, license suspension, and potential criminal charges.

The 0.08% threshold is established based on extensive research indicating that impairment in driving ability begins to significantly increase above this percentage. This legal limit helps ensure that drivers remain safe on the roads, as alcohol can adversely affect coordination, reaction times, and decision-making skills.

Other BAC levels mentioned, such as 0.05%, 0.10%, and 0.15%, do not represent the legal standard for drivers over 21 and may relate to additional laws or penalties, such as for commercial drivers or heightened penalties for repeat offenders.