California BAC Limits & DUI Consequences
Blood-alcohol legal limits for adults, minors, and commercial drivers; refusal-to-test penalties; first-offense consequences.
- BAC limit: adult
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0.08%
- BAC limit: minor (under 21)
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0.01%
- BAC limit: commercial
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0.04%
- Implied consent / refusal consequences
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By driving in California, you consent to a breath, blood, or urine test whenever a law-enforcement officer suspects you of driving under the influence. If you first agree to a preliminary alcohol-screening (PAS) or breath test, you can still be required to submit to a blood or urine test to detect drugs. Refusing any of these tests triggers a DMV suspension or revocation of your driving privilege for one year, on top of any criminal DUI penalties, and refusal is separately admissible against you.
- DUI first-offense consequences
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A first DUI conviction in California triggers a one-year suspension or revocation of the driving privilege by DMV, completion of a licensed DUI program, filing of a California Insurance Proof Certificate (SR 22/SR 1P), payment of any license reissue or restriction fees, and potentially installation of an ignition interlock device (IID). On the criminal side, a first DUI can carry up to six months in jail and a court-imposed fine, and law enforcement may impound the vehicle with a storage fee owed by the driver. If the DUI causes serious injury or death, civil lawsuits are also on the table. Every DUI conviction remains on the driver's record for 10 years, and additional DUIs during that window carry additional court or DMV penalties.
Source: California Driver's Handbook (2025), Section 9: Alcohol and Drugs (DUI Convictions), p. 74.
- Ignition interlock required
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conditional
Source: California Driver's Handbook (2025), Section 9: Alcohol and Drugs (DUI Convictions), p. 74.
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