Portland, OR Noise Ordinance
Quiet Hours: 10 PM - 7 AM (general night hours), 7 AM - 10 PM (general day hours)
Residential Decibel Limit: 55 dBA (source residential/open space), 60 dBA (source commercial/mixed use), 65 dBA (source industrial) (Day) / 50 dBA (source residential/open space), 55 dBA (source commercial/mixed use), 60 dBA (source industrial) (Night)
Summary: Portland, OR's Noise Control Ordinance (Title 18) aims to minimize excessive sound to protect public health, safety, and welfare. It establishes specific permissible sound levels based on land use zones and time of day, with stricter limits during night hours (10 PM to 7 AM). The ordinance covers various sources, including construction, amplified sound, and vehicle noise, and outlines penalties for violations.