Santa Ana regulates industrial noise under SAMC Chapter 18, Article VI. Industrial and commercial noise sources must not exceed the exterior noise standards at the boundary of the nearest residential zone — 55 dBA daytime and 50 dBA nighttime.
Under SAMC Section 18-312, industrial and commercial noise is measured at the property line of the receiving property. When industrial noise affects residential areas (Noise Zone I), the residential standards of 55 dBA daytime and 50 dBA nighttime apply. Industrial zones themselves have higher limits. Industrial operations producing continuous noise must implement sound attenuation measures to meet these standards. HVAC equipment, generators, compressors, and other mechanical equipment must be designed or shielded to comply with applicable noise limits at the nearest residential property line. Environmental review under CEQA may impose additional project-specific noise mitigation for new industrial development.
Industrial noise violations are subject to code enforcement action, administrative fines, and potential misdemeanor charges for persistent violations. Operating permits may be conditioned on noise compliance.
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Side-by-side rule comparisons with other cities in Orange County.
See how other cities in Orange County handle industrial noise.
See how Santa Ana's industrial noise rules stack up against other locations.
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