What is the legal blood alcohol concentration (BAC) limit for drivers under 21 in California?
0.08%
0.08% is the standard adult (21+) BAC limit — not the under-21 limit.
0.05%
0.05% is Utah's adult limit, not California's under-21 limit.
0.04%
0.04% is the federal commercial driver limit.
0.01%
California enforces a zero-tolerance policy for drivers under 21: any BAC of 0.01% or higher results in a one-year license suspension. For drivers 21 and older, the standard limit is 0.08%. For commercial drivers, it drops to 0.04%.
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