Nelson Noise from Specific Sources: Generator Noise Rules (2026)

Pima County does not have a specific ordinance regulating generator noise in unincorporated areas. Generators are common in Pima County for several reasons: monsoon storms (July through September) frequently cause power outages, rural properties outside Tucson Electric Power grid rely on generators for backup or primary power, construction sites use generators for temporary power, and off-grid desert properties use generator-solar hybrid systems. During monsoon power outages, the Pima County Sheriff generally exercises wide discretion on generator noise complaints given the emergency nature of the situation. Permanent standby generators for homes and businesses must comply with Pima County building code electrical permits and setback requirements. HOA CC&Rs in planned communities often regulate permanent generator installations, requiring screening enclosures, setbacks from property lines, and sometimes decibel limits at the property boundary. The Pima County Air Quality division regulates emissions from large commercial or industrial generators but does not set noise limits. Construction site generators in unincorporated areas have no county-imposed time restrictions. Desert terrain and sparse development in much of unincorporated Pima County means generator noise impacts fewer neighbors than in urban settings.