Sonora Decibel Limits Rules (2026): What You Need to Know

Sonora, as a small historic Gold Rush city with a population of approximately 4,855, relies on general nuisance standards rather than codified decibel thresholds to regulate noise. The California Noise Control Act (California Health & Safety Code §46000 et seq.) provides the regulatory backdrop and establishes guidelines such as a 60 dB Ldn (day-night weighted average) for residential land use compatibility. Tuolumne County General Plan noise policies also apply to unincorporated areas adjacent to the city. Within city limits, any noise that disturbs the peace, quiet, and comfort of neighboring residents may constitute a nuisance under Sonora Municipal Code general provisions.

The Sonora Police Department investigates noise complaints and may issue citations under the general penalty provisions of Chapter 1.08 of the Municipal Code. In practice, officers assess whether noise is unreasonably loud, excessive, or disturbing given the time of day and surrounding land uses. Residents are advised to resolve minor disputes neighborly first; persistent issues should be reported to the Police Department.

For context, CalTrans and the California Department of Public Health use 65 dB as a threshold of concern for exterior residential areas. Sonora's historic downtown setting — with tourism, traffic, and outdoor events — means ambient noise levels vary significantly by location within the city.