Municipal Code Section 4-10.4 caps exterior noise at a receiving home at 55 dB(A) daytime and 50 dB(A) at night for more than thirty minutes an hour, with absolute ceilings of 75 and 70 dB(A).
Alameda's noise ordinance, Municipal Code Section 4-10.4, sets a sliding table measured at the receiving property. At single or multiple family residential, school, hospital, church, or public library property the limit is 55 dB(A) day and 50 dB(A) night for thirty minutes in any hour, 65/60 for five minutes, and 75/70 for any duration at all. Commercial receivers get 65 dB(A) day and 60 dB(A) night, rising to 85/80. Daytime runs 7:00 a.m. to 10:00 p.m. Every standard drops 5 dB(A) for simple tone noise, which captures chiller and fan whine. Transformer and electrical substation equipment is capped at 60 dB(A).
Noise above the Section 4-10.4 standards is unlawful. The Planning Department investigates complaints, measures the source, and can order it to comply within six months or cease producing the noise.
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