Draft 2025 Air Quality Monitoring Network Plan

• Washington's air quality monitoring network, including air monitoring stations.
• Recent and planned changes to the network.
• How Ecology will operate its air monitoring stations in the next year.

We review the air quality monitoring network every year to make sure it collects adequate, representative, and useful air quality data. We use this data to make science-based policy decisions.

Documents for review:

• Draft 2025 Annual Air Quality Network Plan
• 2025 Verification of Continued Attainment in Select Maintenance Areas

Background

Ecology, EPA, Tribes, and local clean air agencies maintain a network of air monitoring stations to measure air pollution in Washington. Using continuous monitoring data, we can let you know when air pollution reaches unhealthy levels. Based on this information, people can adjust their daily activities to minimize unhealthy effects.