TagPSCAA(91)

This 2020 study examines how Seattle-Tacoma International Airport affects regional air quality, reviewing data from 1997 to 2018 collected across 13 monitoring stations within a 15-mile radius of the airport. It finds that King County consistently meets federal, state, and regional air quality standards for pollutants such as ozone, carbon monoxide, nitrogen dioxide, and particulate matter. In fact, pollution levels have generally decreased over time, leading authorities to shut down some monitoring stations near SeaTac due to consistently low readings.

The Puget Sound Clean Air Agency proposed a Clean Fuel Standard draft rule in October 2019 aimed at reducing greenhouse gas emissions from transportation fuels sold across King, Kitsap, Pierce, and Snohomish counties. The rule targets a 25% reduction in carbon intensity for the region's transportation fuel pool by 2030, using a system of deficit and credit trading. A public comment period ran through January 6, 2020, with the Agency's Board of Directors set to consider a final rule no sooner than February 27, 2020.

This 2018 report by Cascadia Consulting Group inventories greenhouse gas emissions across the Puget Sound region, covering sources such as transportation, buildings, industry, solid waste, water, and agriculture for the year 2015. It outlines the methodology, data sources, and findings used to measure the region's carbon footprint. While focused on regional air quality and climate impact, it provides context for understanding emissions contributors in the greater Seattle–Tacoma area.

The Highline Forum held its September 27, 2017 meeting at the Des Moines Beach Park Dining Hall, focusing on the theme of air quality in communities surrounding Seattle-Tacoma International Airport. The agenda featured presentations from Port of Seattle Aviation Managing Director Lance Lyttle on airport community engagement, and a regional air quality briefing from the Puget Sound Clean Air Agency. The forum also included an update from the City of Des Moines, finalization of operating procedures, and discussion of topics for the next scheduled meeting.

A September 2017 regional air quality briefing presented by the Puget Sound Clean Air Agency to the Highline Forum covers air pollution sources, trends in south King County, and efforts to improve air quality in the region. The presentation also introduces an upcoming University of Washington study on ultrafine particle pollution, which is particularly relevant to communities near high-traffic corridors. The agency's vision emphasizes clean and healthy air for all residents regardless of socioeconomic status or location, covering four counties: King, Pierce, Snohomish, and Kitsap.