Quiet hours in Alhambra, CA — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
Alhambra's noise code (Municipal Code Ch. 18.02) sets no single citywide curfew. Instead it caps received noise by interior dBA limit at all hours and restricts construction and property-maintenance activities to daytime windows, with nighttime hours protected mainly through the construction and maintenance exemption cutoffs.
Unlike many cities, the City of Alhambra does not codify a blanket 'quiet hours' clock in its noise standards. Section 18.02.050 instead makes it unlawful to produce noise received on another person's property within a designated noise zone above fixed interior limits measured at least four feet from the nearest wall, ceiling, or floor with windows and doors closed: 55 dBA in residential zones, 60 dBA in the Mixed Use zone (Main Street between Garfield and Atlantic), and 70 dBA in commercial/industrial zones. These limits apply around the clock, so nighttime sound that would be tolerable by day can still violate the code because the standard is absolute, not time-of-day adjusted (though the limit rises to match ambient if ambient is higher). The practical 'quiet hours' come from the exemption cutoffs in Section 18.02.060: construction and grading may not occur 7 p.m. to 7 a.m. on weekdays including Saturday, or at any time on Sunday or a federal holiday, and routine property maintenance is allowed only 7 a.m. to 6 p.m. (9 a.m. to 5 p.m. on Sunday). This city framework is independent of Los Angeles County Code Ch. 12.08, which governs only unincorporated areas, not incorporated Alhambra.
Noise exceeding the interior dBA limit for the zone, received on another person's property, is a public nuisance and an infraction under Section 18.02.120. First offense typically triggers a written notice to correct; continued or repeat violations are cited as infractions (per Cal. Gov. Code 36900: up to $100 first, $200 second, $500 third within a year) and may be abated by injunction.
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Side-by-side rule comparisons with other cities in Los Angeles County.
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