TagNoise(310)

Washington State's Substitute House Bill 1847, signed into law in March 2020, expands the aircraft noise abatement programs available to port districts by lowering the qualifying threshold from 900 to 20 scheduled jet flights per day and extending the geographic boundaries of 'impacted areas' around airport runways. The law allows port districts to pursue noise relief measures—including property acquisition, soundproofing, transaction assistance, and mortgage insurance—for communities affected by aircraft noise. It amends three existing state statutes (RCW 53.54.010, 53.54.020, and 53.54.030) and took effect on June 11, 2020.

A 2020 study gathered input from 48 community stakeholders near Seattle-Tacoma International Airport, finding that while residents valued the economic benefits, jobs, and convenient access the airport provides, noise and air quality were the top concerns—especially for those living to the south and west under flight paths. Stakeholders raised issues including late-night flights, NextGen procedures concentrating aircraft noise, ultrafine particle pollution, and the limitations of existing noise mitigation programs. Traffic congestion and potential public health impacts from aircraft emissions were also frequently cited challenges.

A 2020 study evaluated the positive, negative, and neutral effects of Seattle-Tacoma International Airport on six nearby cities — Burien, Des Moines, Federal Way, Normandy Park, SeaTac, and Tukwila — using data spanning 1997 to 2019. The study found that noise was the top public concern, followed closely by air quality issues from aircraft operations, along with traffic congestion and distrust of the FAA and Port of Seattle. Researchers attempted to distinguish between impacts directly caused by airport operations and those resulting from the broader regional population growth that roughly doubled over the same period.

This 2020 report examines how noise from Seattle-Tacoma International Airport has changed between 1997 and 2019, focusing on the impact of aircraft takeoffs, landings, and overflights on nearby communities. It explains key noise measurement concepts—including decibels, Sound Exposure Level (SEL), and the Day-Night Average Sound Level (DNL)—and notes that while DNL is the federal regulatory standard used by the FAA, individual SEL events are often what residents find most disruptive. The report highlights a growing tension between how federal agencies measure and regulate aircraft noise and the real-world experience of people living under flight paths.

This April 2020 FAA Report to Congress evaluates alternative noise metrics to the current Day-Night Level (DNL) 65 decibel standard used to measure community aircraft noise exposure, as required by the FAA Reauthorization Act of 2018. The report reviews the history and definitions of various noise measurement tools, explains why no single metric can address all aviation noise situations, and examines the roles of both noise modeling and actual noise sampling. It was produced in response to congressional direction to assess whether better methods exist for capturing and addressing community concerns about airplane noise.

Arlington County, Virginia awarded a consulting contract (No. 20-042-RFP) to ABCx2, LLC in March 2020 to study aircraft noise generated by Reagan National Airport air traffic affecting Arlington County, Virginia, and Montgomery County, Maryland, and to recommend mitigation strategies. The fixed-price contract is valued at up to $250,000 and covers an initial 12-month term with the option for two additional one-year renewals through March 2023. Note: This contract pertains to Reagan National Airport and Arlington/Montgomery County communities, not Sea-Tac Airport.