Unincorporated Pinal County caps vehicle noise measured at 50 feet: 82-90 dBA for heavy trucks, 76-82 dBA for cars, and 82-86 dBA for motorcycles depending on the street. All vehicles must have a working muffler; loud vehicle repairs are banned 10pm-7am in residential areas.
Section 6.0(B), Table 2 sets sound limits measured 50 feet (15 m) from the street center or the vehicle. Vehicles 10,000+ lbs GVWR: 86 dBA on a local street, 90 dBA on a major/paved surface. Other motor vehicles: 76 dBA local, 82 dBA major. Motorcycles: 82 dBA local, 86 dBA major. Every vehicle must run a muffler free of defects and not modified to amplify sound. It is also unlawful to repair, rebuild or test a motor vehicle in a residential area between 10:00 p.m. and 7:00 a.m. in a manner creating excessive noise.
Class 1 misdemeanor (disorderly conduct) and/or civil fine up to $750/day; each day is a separate offense.
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See how Pinal County's vehicle noise rules stack up against other locations.
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