Vehicle noise in Brentwood is regulated primarily through California Vehicle Code §27150 (adequate muffler) and §23130 (decibel limits), enforced by Brentwood Police. Modified exhaust, engine revving, and audio systems audible at 50 feet can result in citations and fix-it tickets.
Vehicle noise enforcement in Brentwood relies on California Vehicle Code provisions enforced by the Brentwood Police Department traffic unit. CVC §27150 requires all motor vehicles to maintain an adequate muffler and prohibits amplification devices that increase exhaust noise. CVC §27151 prohibits modified exhaust that exceeds noise limits set by CVC §23130 (95 dBA for motorcycles, 80-86 dBA for cars depending on weight). CVC §27007 prohibits vehicle sound systems audible at 50 feet or more. Brentwood PD frequently enforces these statutes on arterials like Balfour Road, Brentwood Boulevard, and Lone Tree Way. Violations typically result in a "fix-it" ticket requiring the driver to bring the vehicle into compliance and have the correction signed off at a CHP inspection station, plus a $25 administrative fee. Engine revving, burnouts, and street racing can trigger exhibition-of-speed charges under CVC §23109. BART Antioch Station area and downtown Brentwood see particular enforcement focus.
Contact your local code enforcement office for specific penalty information.
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Side-by-side rule comparisons with other cities in Contra Costa County.
See how other cities in Contra Costa County handle vehicle noise.
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