5 county-level rules, plus city-specific rules for 1 city in Napa County, California.
Verified from official government sources
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 Code §8.16.080 prohibits the operation of construction or demolition tools or equipment between 7:00 p.m. and 7:00 a.m. when the sound creates a noise disturbance across a residential or commercial real property line. The restriction applies in unincorporated Napa County. Activities outside those hours generally require findings of necessity or an emergency.
Napa County Code §8.16.080 prohibits keeping or maintaining any animal that causes annoyance or discomfort to two or more reasonable persons of normal sensitiveness residing in separate residences by frequent or long-continued noise. Noise that is audible continuously for ten minutes, or intermittently for thirty minutes, is prima facie evidence of a violation.
Unincorporated Napa County does not have a stand-alone leaf-blower ban. Powered garden tools (leaf blowers, mowers, chainsaws) are regulated under the general property-line noise standards in Napa County Code §8.16.070 and the prohibited-noise list in §8.16.080. They cannot be operated in a way that creates a noise disturbance across a residential property line and cannot exceed the §8.16.070 exterior limits, which are lower between 10 p.m. and 7 a.m.
Cal. Health & Safety Code § 41015 (AB 1346, 2021)
small off-road engines, as defined by the state board. The bill would require the state board to identify and, to the extent feasible, make available funding for commercial rebates or similar incentive funding as part of any updates to existing applicable funding program guidelines to local air pollution control districts and air quality management districts to implement to support the transiti...
Napa County Code §8.16.080 prohibits operating any loudspeaker or amplified-sound device when the sound creates a noise disturbance or violates the exterior limits in §8.16.070, except where a variance has been issued by the Noise Control Officer. Wineries are subject to Chapter 8.16 and additionally controlled by Use Permit Conditions of Approval - amplified outdoor music is not typically approved at Napa Valley wineries and requires explicit County permission.
1 cities in Napa County have their own noise ordinances rules. Each link goes to that city's dedicated page with code citations.
See every category we cover for Napa County — parking, noise, fences, fires, animals, pools, and more.
Napa County Ordinance Hub →