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

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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

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

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.

Summary Reports

Report Icon for AQI
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

Data Viz

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

Technical Reports

Report Icon for FRM FEM
PM2.5 Continuous Monitor Comparability Assessments
Report Icon for FRM FEM
PM10 Continuous Monitor Comparability Assessments
Report Icon for QC check
Single Point Precision and Bias Report

Contact Us to ask a question, provide feedback, or report a problem.