Rialto Municipal Code Title 9, Chapter 9.50 (Noise Control) establishes exterior noise limits measured at the property line of the impacted receiving land use. Limits vary by zoning of the receptor (residential strictest) and time of day (7am-10pm daytime vs 10pm-7am nighttime). Construction activity is separately regulated under the same chapter.
Rialto MC Ch. 9.50 follows the CA model noise ordinance framework: noise is measured at the receiving property's exterior, not at the source. Typical California municipal limits applied in Rialto: Residential receptor 55 dBA night / 65 dBA day; Commercial receptor 60/65 dBA; Industrial receptor 70 dBA. Anyone-can-hear plainly-audible standards may apply to amplified music after 10pm. State CCR Title 24 Part 2 §1207 sets interior noise insulation standards for new residential construction (45 dB CNEL interior). The State's noise element of the General Plan (Gov. Code §65302(f)) requires Rialto to map noise contours.
Infraction or misdemeanor at city discretion. Cal. Gov. Code §36900 caps: $100 / $200 / $500 escalating fines. Continuing violations are each day a separate offense. Court may order abatement.
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