Pittsburgh caps industrial noise at 70 dB(A) daytime and 60 dB(A) nighttime at the nearest residential property line. Zoning Code Ch. 917 governs all land-use noise including manufacturing.
Industrial and commercial operations in Pittsburgh must comply with Zoning Code Title 9, Chapter 917 (Operational Performance Standards), which sets quantitative noise limits measured at the lot line of the receiving property. Industrial zones (UI, LI) are held to 70 dB(A) during daytime (6 AM to 10 PM) and 60 dB(A) during nighttime (10 PM to 6 AM) when the receiving property is residentially zoned. Sound is measured using the A-weighting network per ANSI S1.4 with slow exponential time weighting for steady sources and fast weighting for impact noise. Pittsburgh retains its industrial heritage in neighborhoods like the Strip District, Lawrenceville, and along the three rivers, so the city actively enforces these limits in mixed-use transition areas. The Department of Permits, Licenses, and Inspections (PLI) handles enforcement, and the Zoning Board of Adjustment may condition variances on noise-mitigation measures such as sound barriers or restricted operating hours.
Violations are enforced through PLI. Fines range from $100 to $500 per day of violation. Zoning Board conditions may require sound barriers or equipment modifications. Continued noncompliance can lead to revocation of occupancy permits.
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