TagPSCAA(91)

A 2023 Washington State legislative funding request of $412,000 seeks to establish two ultrafine particle air quality monitors near Sea-Tac Airport and the I-5/I-90 interchange in Seattle, operated by the Puget Sound Clean Air Agency. The project aims to measure tiny airborne particles — particularly those produced by aircraft and vehicle traffic — that are not currently tracked routinely in Washington State. The University of Washington would analyze the collected data to identify pollution sources and establish health-impact baselines, with monitoring expected to begin in spring 2024.

A University of Washington research team presented findings to a community advisory group showing that HEPA air purifiers in classrooms near Sea-Tac Airport reduced ultrafine particle (UFP) levels from 50% down to just 10% of outdoor concentrations. The meeting, held August 8, 2022, also covered a small pilot health study suggesting short-term cardiovascular and respiratory differences in people exposed to aircraft UFPs while walking under flight paths. Participants from government agencies, community organizations, and public health departments discussed next steps including expanded outdoor monitoring, wildfire response planning, and potential new funding through the HEAL Act.

The Puget Sound Clean Air Agency's 'State of the Airshed' report reviews progress on the agency's 2014 Strategic Plan, which aimed to protect public health, improve neighborhood air quality, and reduce the region's contribution to climate change across King, Kitsap, Pierce, and Snohomish counties. The report examines how the agency met or fell short of its goals amid regional growth and challenges such as wildfire smoke and the COVID-19 pandemic. Note: This document focuses on air quality and does not contain information related to Sea-Tac Airport noise policy.