Quiet hours in Napa County, CA — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
Unincorporated Napa County regulates noise under County Code Chapter 8.16 (Noise Control Regulations). Sections 8.16.060 and 8.16.070 set interior and exterior noise limits using a tabular dBA standard tied to land-use category. Section 8.16.080 enumerates specific prohibited noises that apply at all hours when they create a disturbance across a property line. The General Plan Noise Element supplements the code, and the Sheriff and Code Compliance enforce alongside California Penal Code Section 415.
Napa County's noise authority is Chapter 8.16 of the County Code (Title 8, Health and Safety). Section 8.16.040 sets the general restriction that no person shall make, continue, or cause to be made any loud, unnecessary, or unusual noise that disturbs the peace and quiet of a neighborhood or a reasonable person of normal sensitiveness. Section 8.16.060 establishes interior noise standards inside residential dwelling units from outside sources (per Table 8.16.060) for cumulative periods exceeding five minutes in any hour. Section 8.16.070 establishes exterior noise limits (per Table 8.16.070) for cumulative periods exceeding thirty minutes in any hour, with lower thresholds during the nighttime period (10 p.m. to 7 a.m.). Section 8.16.080 enumerates specific types of noise that are prohibited when they create a noise disturbance. The five incorporated cities in the County (Napa, American Canyon, Yountville, St. Helena, Calistoga) operate under their own municipal codes; Chapter 8.16 applies only in unincorporated Napa County. Active complaints (loud parties, amplified music) are responded to by the Napa County Sheriff under Penal Code Section 415.
Violations of Chapter 8.16 are enforced through the County's general enforcement provisions and may be charged as infractions or misdemeanors. Continuing violations may be cited each day they occur. Active disturbances responded to by the Sheriff may be charged under California Penal Code Section 415 (disturbing the peace by loud and unreasonable noise).
Napa County, CA
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See how Napa County's quiet hours rules stack up against other locations.
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