Modesto's noise ordinance (MMC Title 4, Ch. 9) bans 'loud and raucous noise' citywide, including from industrial operations. Certain continuous industrial activities may qualify for exemptions under § 4-9.104, but nighttime violations are strictly enforced by the Code Enforcement Unit.
MMC §§ 4-9.101 through 4-9.105 define 'loud and raucous noise' as any sound that, by volume, duration, or character, annoys or endangers a reasonable person. Section 4-9.103 enumerates specific prohibited acts; § 4-9.104 provides exemptions for certain activities including some established industrial operations. The ordinance is complaint-driven and enforced by the Code Enforcement Unit (209-577-5250). No specific decibel table is published in the general noise chapter, so the 'loud and raucous' nuisance standard governs. Industrial uses near residential zones may also face additional conditions through zoning permits under MMC Title 10.
Violations are a misdemeanor or infraction. Fines range from $100 to $1,000 per violation; repeat violations may trigger abatement proceedings and escalating civil penalties.
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See how Modesto's industrial noise rules stack up against other locations.
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