Oxnard's Sound Regulation ordinance caps exterior noise at the property line by sound zone: 55 dBA day and 50 dBA night at homes, 70 dBA day and night on industrial (M-L, M-1, M-2) land. Section 7-185 governs; a data center's cooling and generators must comply.
Oxnard's Sound Regulation ordinance (Chapter 7, Article XI) assigns every property to a sound zone and sets exterior limits measured at the source property line. Sound Zone I (residential) allows 55 dBA from 7 a.m. to 10 p.m. and 50 dBA overnight; Sound Zone II (commercial) allows 65/60 dBA; Sound Zone III (industrial - M-L, M-1, M-2) allows 70 dBA day and night. At a boundary between two zones, the lower limit applies, so a data center on industrial land abutting homes is held to the 55/50 dBA residential cap. Because cooling towers and chillers run continuously, the measured level is compared directly to the limit under Section 7-185(F).
Noise exceeding the Section 7-185 limits is a public nuisance and a misdemeanor punishable by a fine up to $1,000 or six months in jail, with each day a separate offense.
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