Rialto Municipal Code Ch. 9.50 (Noise Control) sets exterior noise standards measured at the property line of the receiving land use. Industrial sources adjacent to residential receptors are limited by the residential receiving-zone standard (typically 65 dBA daytime / 55 dBA nighttime). SCAQMD Rule 2305 (Warehouse ISR) layers regional NOx/PM mitigation obligations on warehouses ≥100,000 sq ft.
Rialto's noise ordinance (Title 9, Ch. 9.50) is a receiving-property standard: the limit is measured at the property line of the noise-impacted receptor, not the noise source. Industrial uses in M-1/M-2 zones must not cause exterior noise at an abutting residential parcel to exceed the residential standard (commonly 65 dBA 7am-10pm; 55 dBA 10pm-7am for CA model ordinances). Truck idling at warehouses is also limited by CARB's statewide 5-minute idling rule (13 CCR §2485) and South Coast AQMD Rule 2305 Warehouse Indirect Source Rule applies to facilities ≥100,000 sq ft (Rialto has many qualifying logistics sites along I-10/I-210).
Noise violations are infractions/misdemeanors under Rialto Municipal Code Ch. 1.12 general penalty: first infraction up to $100, second within one year up to $200, third up to $500 (Cal. Gov. Code §36900). CARB idling violations: minimum $300 per occurrence (13 CCR §2485).
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