Napa County, CA Noise Ordinances: Quiet Hours (2026)
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.
Key Facts
- Nighttime period
- 10:00 p.m. - 7:00 a.m.
- Interior residential limit (night)
- 55 dBA
- Interior residential limit (day)
- 60 dBA
- Tonal/music penalty
- -5 dB further reduction
- Code chapter
- Napa County Code Ch. 8.16
Summary
Napa County's Noise Control Regulations (Chapter 8.16) set lower nighttime exterior and interior noise standards from 10:00 p.m. to 7:00 a.m., effectively functioning as nighttime quiet hours in unincorporated areas.
Daytime (7 a.m. - 10 p.m.) maximum interior noise levels for residential uses are limited to 60 A-weighted decibels (dBA); nighttime (10 p.m. - 7 a.m.) maximum interior noise levels are limited to 55 dBA.
Full Breakdown
Chapter 8.16 of the Napa County Code establishes both interior and exterior noise standards keyed to land use, with reduced limits during the nighttime period of 10:00 p.m. to 7:00 a.m. Per Table 8.16.060, the interior noise standard for residential dwelling units is 60 dBA during the daytime period (7 a.m. to 10 p.m.) and 55 dBA at night (10 p.m. to 7 a.m.). Section 8.16.070 prohibits operating any source of sound that causes the exterior noise level to exceed the standard for the affected land use for a cumulative period of more than 30 minutes in any hour, plus 5 dB for more than 15 minutes, or plus 20 dB at any time. If the noise contains a steady tone, repetitive sound, music or speech, the standard limit is reduced by an additional 5 dB. These regulations apply throughout the unincorporated county.
Violations & Fines
Violation of Chapter 8.16 can be cited as a noise disturbance by the Napa County Noise Control Officer or Sheriff. Continuing violations are handled under Title 1 of the Napa County Code as infractions or misdemeanors with escalating fines.
Frequently Asked Questions
Are there fixed 'quiet hours' for the unincorporated county?
Do these rules apply inside the City of Napa or Yountville?
Sources & Official References
Other rules in Napa County
How Napa County compares: Cities with the Strictest Noise Ordinances·California rules heatmap·Compare Napa County to another location·View the California noise ordinances overview
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