In California, the legal alcohol limit for most adult drivers is a blood alcohol concentration (BAC) of 0.08% . However, there are lower BAC limits for certain drivers, including:

• Commercial drivers: 0.04%
• Taxi, limo, and ride-sharing drivers: 0.04% if they have passengers, 0.08% if they are alone in the vehicle
• Underage drivers: 0.01% or higher

It is important to note that someone can still be found guilty of driving under the influence even if their BAC is below the legal limit. A person is considered to be under the influence anytime that their ability to drive is impaired by drugs or alcohol, regardless of their BAC.

If a person is convicted of DUI in California, the penalties can include fines, jail time, license suspension, and mandatory attendance at an alcohol treatment program.