Rocklin does not publish a single numerical decibel ordinance in its Municipal Code. Instead, noise standards are set by the General Plan Noise Element (Chapter IV.E) using California's land-use compatibility matrix: residential exterior 60 dBA Ldn/CNEL 'normally acceptable,' 60–65 dBA 'conditionally acceptable' (mitigation required), 65–70 dBA 'normally unacceptable,' >70 dBA 'clearly unacceptable.' Interior residential standard is 45 dBA Ldn (California Building Code Title 24 Part 11 §1207). Construction noise is regulated by hours (weekdays 7 a.m.–7 p.m., weekends 8 a.m.–7 p.m.) rather than dB caps. Persistent unreasonable noise is cited under Cal. Penal Code §415 and the General Plan compatibility framework.
California cities can choose between (a) a numerical-decibel noise ordinance (e.g., 50 dBA day / 45 dBA night) or (b) a General Plan Noise Element with land-use compatibility standards plus a 'disturbing-the-peace'-style nuisance framework. Rocklin uses option (b). The Noise Element residential standard is 60 dBA Ldn/CNEL exterior 'normally acceptable'; new development between 60 and 65 dBA Ldn requires an acoustical analysis demonstrating mitigation to interior 45 dBA Ldn (California Building Code §1207 / Title 24 Part 11 interior-noise requirement). For ongoing operations, complaints are evaluated against these thresholds at the receiver. Construction is regulated by allowed hours rather than dB caps (Rocklin Construction Noise Guidelines: weekdays 7 a.m.–7 p.m., weekends 8 a.m.–7 p.m.; violation can trigger a Stop Work Order). Disturbing-the-peace (loud party, sustained shouting, prolonged amplified sound) is enforceable under Rocklin Municipal Code Chapter 9.40 (Disturbance Call Back Cost Recovery) — which charges responsible parties for repeat police responses — and California Penal Code §415.
Disturbing-the-peace infraction or misdemeanor under Cal. Penal Code §415 (fine up to $400 or 90 days). Chapter 9.40 disturbance call-back cost recovery imposes the cost of repeat police responses on the responsible party/owner after a written warning. Construction-noise hour violations may receive a Stop Work Order. Administrative citations under Title 1 may run $100/$200/$500 for first/second/third offenses in 12 months.
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