Elk Grove caps exterior noise at 55 dBA daytime (7 a.m.-10 p.m.) and 45 dBA overnight (10 p.m.-7 a.m.) at a residential property line. Municipal Code Section 6.32.110 holds cooling towers, compressors, and fans to a 55 dBA maximum.
Elk Grove's Noise Control ordinance, Municipal Code Chapter 6.32, sets one exterior standard measured one foot inside the affected residential property line: 55 dBA from 7 a.m. to 10 p.m. and 45 dBA from 10 p.m. to 7 a.m. Section 6.32.110 makes it unlawful to operate any stationary cooling tower, compressor, pump, fan, or air conditioning apparatus that pushes noise past 55 dBA at that line. Limits drop 5 dBA for pure-tone or impulsive noise. A data center's continuous chillers and backup generators are measured against the 45 dBA overnight floor where the site reaches homes.
Operating mechanical equipment over the 55 dBA limit at a residential property line is a public nuisance under Chapter 6.32, enforced by Code Enforcement through abatement, citations, and permit conditions.
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