Napa, CA Public Conduct: Loud Party Ordinance (2026)

Chapter 9.50 was adopted to reduce repeat Police calls to loud parties without creating new criminal liability. NMC 9.50.030 defines a loud and unruly gathering as a gathering of two or more persons on public or private property in a manner that constitutes a substantial disturbance of the quiet enjoyment of public or private property. NMC 9.50.040-050 establish the two-step enforcement model: on a first response the officer in charge gives the responsible person written notice that any subsequent response within 12 months will be subject to citation. On a second or subsequent response, the responsible person is liable for civil penalties (set by Council resolution) and for full Police-service cost recovery under NMC 1.16.050, including officer time, vehicle and equipment costs, and any damage. Underage drinking is reached separately under the City's Minor Alcohol Offense / Loud Parties chapter (the City's social-host track), with a fine of up to $1,000 and possible jail time, plus half-hour billed Police cost recovery at $100 per officer responding. Generic noise disturbances also remain reachable under NMC 8.08.020 and California Penal Code 415(2).