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Air Data: Air Quality Data Collected at Outdoor Monitors Across the US

The tools below are connected directly to EPA's Air Quality System Data Mart.

Basic Information

Frequent Questions

Air Data: Air Quality Data Collected at Outdoor Monitors Across the US

This website provides access to outdoor air quality data collected from state, local and tribal monitoring agencies across the United States.

Monitor Locations

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Air Data Updates

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Subscribe to our RSS feed to keep up with the latest news, including scheduled system downtime, major data updates, etc.