Quiet hours in Delano, CA — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
Delano regulates noise through the Development Code's noise hazard provisions (DMC §20.10.180), which apply standards drawn from the General Plan Noise Element to any property within the 65 dB CNEL noise contour.
When a new use is proposed within or adjacent to the 65 dB CNEL contour, an acoustical report is required. Interior noise in residences and educational buildings must not exceed 45 dB(A) CNEL from outside sources, and exterior noise in residential areas is capped at 65 dB(A) CNEL. Stricter interior limits apply to specific occupancies — 45 dB(A) for churches/libraries, 50 dB(A) for offices, 55 dB(A) for retail/restaurants, and 65 dB(A) for warehouses.
Noise above the CNEL standards constitutes a nuisance enforceable by Delano Code Enforcement and the Delano Police Department. Mitigation measures (sound walls, building shell upgrades) may be required as a condition of any project approval.
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