Quiet hours in Chino, CA — also called the noise ordinance, nighttime noise rules, or residential quiet time — define the hours during which excessive noise is prohibited.
Chino does not impose a strict bedtime curfew on residents, but Chino Municipal Code Chapter 9.40 (Noise) sets enforceable A-weighted decibel limits at the receiving residential property line that drop 5 dB between 10:00 p.m. and 7:00 a.m. Section 9.40.040 (Exterior Noise Standards) caps continuous noise (L50) at 55 dBA daytime / 50 dBA nighttime, with maximum (Lmax) of 75 dBA daytime / 70 dBA nighttime.
CMC § 9.40.040 establishes a tiered exterior noise standard measured at residential property lines: 30 min/hr (L50) 55 dBA day / 50 dBA night; 15 min/hr (L25) 60/55; 5 min/hr (L08) 65/60; 1 min/hr (L02) 70/65; any period (Lmax) 75/70. Daytime is 7:00 a.m. to 10:00 p.m.; nighttime is 10:00 p.m. to 7:00 a.m. (per City of Chino General Plan EIR Section 4.10, Table 4.10-5, summarizing CMC § 9.40.040). The ordinance is enforced as a public nuisance and complaint-driven via Chino Police non-emergency dispatch. Loud or unruly gatherings on private property are separately regulated under CMC Chapter 9.36 (as amended by Ordinance No. 2019-005), which imposes escalating administrative fines on the responsible party without a numeric decibel test.
Noise above the table limits is an infraction under Title 9 and a public nuisance. Loud-gathering violations under CMC Chapter 9.36 (amended by Ord. 2019-005, eff. 2019): written warning first response; $250 second response; $500 third response; $750 fourth response, cumulative within a 72-hour period (up to $1,500 for four calls). Parents responsible if the host is a minor.
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Side-by-side rule comparisons with other cities in San Bernardino County.
See how other cities in San Bernardino County handle quiet hours.
See how Chino's quiet hours rules stack up against other locations.
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