Ventura County establishes specific decibel limits for unincorporated areas under VCC Section 4604-8. Residential zones are limited to 55 dBA daytime and 45 dBA nighttime, measured at the receiving property line.
The Ventura County noise ordinance sets maximum permissible noise levels based on zoning classification. Residential zones: 55 dBA daytime (7 AM-10 PM) and 45 dBA nighttime (10 PM-7 AM). Commercial zones: 65 dBA daytime and 55 dBA nighttime. Industrial zones: 70 dBA daytime and 60 dBA nighttime. Measurements are taken at the receiving property line using the A-weighted decibel scale. Impulsive sounds such as hammering or equipment startup may exceed the steady-state limit by up to 5 dBA. Agricultural operations in appropriately zoned areas receive consideration under the Right to Farm Act. The county may use sound level meters during enforcement but complaints can also be processed based on the subjective standard of unreasonable disturbance.
Exceeding established decibel limits is an infraction under the county code. First offense: $250, second: $500, third within 12 months: $1,000. Ongoing violations may be declared a public nuisance with abatement costs assessed to the property owner. Commercial or industrial operations repeatedly exceeding limits may face conditional use permit modifications.
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