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.

Download Data

Data Icon for Files
Pre-generated Data Files
Data Icon for Daily
Download Daily Data
Data Icon for Raw
Download Raw Data

Explore Monitor Locations

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Get 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.

Generate Summary Reports

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Air Quality Index Report
Report Icon for Stats
Air Quality Statistics Report
Report Icon for Monitor
Monitor Values Report
Report Icon for HAPS
Monitor Values Report - Hazardous Air Pollutants
Report Icon for AQI Daily
Air Quality Index Daily Values Report

Visualize Data

Tile Plot - Multiyear
Tile Plot - Multiyear
Tile Plot
Tile Plot - Single Year
AQI plot
AQI Plot
Concentration Plot
Concentration Plot
Ozone Exceedances Plot
Ozone Exceedances Plot
Concentration Map Icon
Concentration Map

Generate Technical Reports

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PM2.5 Continuous Monitor Comparability Assessments
Report Icon for FRM FEM
Single Point Precision and Bias Report

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