Alameda, CA Noise Ordinances: Industrial Noise (2026)

Industrial, mechanical, and other fixed sources are regulated through the measured standards of AMC Section 4-10.4 (Tables I and II), enforced at the receiving residential, school, hospital, church, library, or commercial property. The Municipal Code provides a specialized abatement track: under 4-10.8, when measurements show a source exceeds the standards, the Planning or Public Works Department develops noise-reduction methods and can require the source to comply within six months or cease and desist. Under 4-10.9, contested cases go to the Planning Board, which can require the operator to implement cost-effective noise-reduction measures, with a 90-day cease-and-desist backstop. Section 4-10.5 also limits vibration (above the perception threshold at the property line, or 150 feet in public space) and electronically amplified non-emergency signals. Specific numeric notes include a 60 dB(A) limit for electrical substation transformers (4-10.4f) and a 55/50 dB(A) limit for residential air-conditioning/refrigeration equipment installed before/after the ordinance (4-10.5). Operators of new or altered machinery may apply to the Planning Board for a Certificate of Compliance under 4-10.11. These are City of Alameda standards, separate from county or state OSHA noise rules.