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Noise Working Group Program Updates: February 10, 2025

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Port of Seattle
StART
Aviation 20250210

The Seattle-Tacoma International Airport Noise Working Group met on February 10, 2025, to review ongoing noise management initiatives, including quarterly updates to the Late Night Noise Limitation Program, which voluntarily monitors takeoff and landing noise levels between 12:00 a.m. and 5:00 a.m. The program tracks noise exceedances against established decibel thresholds at four runway monitor locations and contacts airlines when those thresholds are exceeded. The meeting also covered late-night runway usage trends for 2025, aircraft go-around activity for December and January, and a summary of public noise complaints received in December.

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Port of Seattle Seattle-Tacoma International Airport (Sea-Tac Airport) StART Noise Working Group presentation dated February 10, 2025. Covers Late Night Noise Limitation Program Q4 updates, Late Night Runway Usage update for 2025, Aircraft Go-around update for December/January, and Noise Comment Report Summary for December. The voluntary Late Night Noise Limitation Program monitors takeoff and landing noise levels from 12:00am to 5:00am, with thresholds at SEA12 (Departures 91 dB, Arrivals 88 dB), SEA13 (Arrivals 82 dB), SEA18 (Arrivals 89 dB), and SEA19 (Departures 91 dB, Arrivals 88 dB). Noise exceedances tracked quarterly; airlines contacted regarding exceedances.

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