TagCommerce Impacts Study 2018(17)

The Washington State Department of Commerce's Technical Advisory Committee (TAC) reviewed 72 recommendations from a study on Sea-Tac Airport's impacts on neighboring cities, ultimately prioritizing 13 key next steps. These priorities span public health, air quality, noise and vibration, mobility, and environmental concerns, including expanding late-night noise limits, improving air quality monitoring, and developing alternative noise metrics beyond standard day-night average (DNL) contours. The TAC also recommended revising the report's language around the Port of Seattle's airport expansion plans to reflect that the proposal was still under FAA review at the time of publication.

A 2020 Washington State study, funded by the legislature and six nearby cities with a combined $600,000 budget, examines how Seattle-Tacoma International Airport's operations have historically affected surrounding communities including Burien, Des Moines, Federal Way, Normandy Park, SeaTac, and Tukwila. Unlike a similar 1997 study that projected future impacts from a proposed third runway, this study reviews historical data from 1997 to 2019 to establish a baseline of airport-related impacts across a range of metrics. The study area covers about 61 square miles and is home to over 237,000 residents, a population density roughly 3.3 times greater than the King County average.

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 public health study examines the effects of Seattle-Tacoma International Airport operations on nearby communities, analyzing health indicators such as cancer, heart disease, and Alzheimer's disease death rates between 2012 and 2016. Study area cities like Burien, Des Moines, Federal Way, SeaTac, and Tukwila generally showed higher cancer and heart disease death rates than King County as a whole, though rates declined somewhat over the period. The report aims to identify whether airport operations contributed to adverse health outcomes and recommends strategies for ongoing investigation and mitigation.

A 2020 study examined how Seattle-Tacoma International Airport has affected quality of life in nearby communities over the past two decades, looking at public safety, health, and socioeconomic conditions across three time periods: 1997, 2009, and 2019. The study built on a 1997 report that found airport neighbors bore disproportionate burdens—including lower property values, higher social service demand, and increased noise and pollution—while regional benefits largely bypassed them. Key findings confirm that many of those predicted adverse effects, such as shifts from owner-occupied to rental housing and rising service costs, have continued to materialize in communities closest to the airport.

This section of a 2020 study examines how the operation of Seattle-Tacoma International Airport affects nighttime light conditions in surrounding communities, using satellite imagery data collected between 1998 and 2018. Researchers analyzed 'skyglow' — light pollution caused by electric fixtures and light reflected off surfaces like roads and parking lots — across the broader Central Puget Sound region. The study notes that nighttime light emission readings can vary by 15–20% due to factors such as weather, seasonal vegetation, and imaging conditions, and it identifies specific light fixture types that contribute most to sky glow.

This May 2020 report, prepared by Stantec for the Washington State Department of Commerce under legislative authorization ESSB 6032, examines the current and ongoing effects of operating Seattle-Tacoma International Airport (Sea-Tac). It assesses a range of impacts on surrounding communities resulting from airport operations. The study serves as a key resource for policymakers evaluating noise and other environmental effects associated with Sea-Tac's continued operation.