Unlike many rural counties, Yuba County has adopted a noise ordinance, Chapter 8.20 of the County Code. It sets exterior limits of 55 dBA daytime and 45 dBA at night for residential areas, measured at the property line, and controls a data center's cooling and generator noise.
Yuba County Code Chapter 8.20 (Title VIII, Public Peace and Safety) is the county's noise ordinance and the primary tool for stationary sources like data-center chillers, cooling fans, and backup generators. It establishes an ambient base noise level (Section 8.20.140) and exterior noise standards that vary by zone and time: a single-family residential limit of about 55 dBA during the day and 45 dBA from 10 p.m. to 7 a.m., with higher levels allowed in industrial districts. Section 8.20.310 makes it unlawful to run construction equipment within 500 feet of a residential zone at night without a permit. A project may seek a temporary exemption permit from the Department of Planning and Building Services under Section 8.20.710.
Operating cooling equipment or generators above the Chapter 8.20 exterior limits, or running night construction within 500 feet of homes without a permit, violates the noise ordinance and can bring notices of violation, abatement orders, and enforceable permit conditions.
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See how Yuba County's data center noise limits rules stack up against other locations.
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