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Washington State Air Quality

Published by data.wa.gov | State of Washington | Catalog Last Checked: April 27, 2026 at 02:18 PM | Dataset Last Updated: April 24, 2026
The links on this page provide access to the Washington State Department of Ecology's Air Monitoring Network, which tracks various air pollutants at more than six dozen sites statewide. Visitors can filter and export historic data using the Site Report tool, and gather traffic-specific air pollutant data from the Seattle and Tacoma monitoring sites linked below.

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  • Washington State Air Monitoring Network

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