Pittsburgh sets residential noise at 65 dB(A) daytime and 55 dB(A) nighttime, commercial/industrial at 70/60 dB(A) at the nearest residential line. Measured per ANSI S1.4 A-weighting.
Pittsburgh establishes quantitative decibel limits under City Code Title 6, Chapter 601 (Public Order) and Zoning Code Title 9, Chapter 917 (Operational Performance Standards). Residential zones are capped at 65 dB(A) from 6 AM to 10 PM and 55 dB(A) from 10 PM to 6 AM. Commercial and industrial zones are permitted up to 70 dB(A) daytime and 60 dB(A) nighttime at the nearest residential property line. All measurements use the A-weighting network of a Type I or Type II sound level meter conforming to ANSI S1.4. Steady-state noise is measured on slow exponential time weighting; impact noise on fast weighting. The measurement point is the property line of the receiving (complaining) property. A visual average over a 30-second sampling period determines compliance. Emergency vehicles, public-works operations, and permitted construction during allowed hours are exempt. The three-rivers geography and hilly terrain can create sound channeling effects in river valleys, which enforcement officers take into account when assessing complaints.
First offense: warning or minimum $15 fine plus court costs. Subsequent violations: fines up to $500 plus court costs. Persistent violations may trigger PLI enforcement action including conditional occupancy requirements for commercial properties.
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