Santa Clarita Municipal Code Section 11.44.040 caps noise received on another's property: 65 dB(A) day and 55 dB(A) night in residential zones, and 80 dB(A) day and 70 dB(A) night in commercial and manufacturing zones. Data-center cooling and generators must comply.
Santa Clarita's noise ordinance, Municipal Code Chapter 11.44, makes it unlawful to produce noise received on another person's property above the Section 11.44.040 limits. Residential zones are capped at 65 dB(A) day (7 a.m.-9 p.m.) and 55 dB(A) night (9 p.m.-7 a.m.); commercial and manufacturing zones at 80 dB(A) day and 70 dB(A) night. At a boundary between residential and commercial or manufacturing property, the quieter zone's limit applies. A steady whine, screech, or hum - typical of chillers and cooling fans - carries a 5 dB(A) penalty. Section 11.44.070 applies these limits to machinery, fans, and air-conditioning equipment at any property line.
Noise over the Section 11.44.040 limits is a misdemeanor or infraction enforced by the City, and can be abated as a public nuisance by injunction; each day is a separate offense.
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