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Outdoor Air Quality Data

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Air Quality Index Daily Values Report

Use of AirNow Data

This report provides ozone and PM2.5 data from AirNow for recent days that are not available from AQS. AQS data, as it becomes available, replaces any AirNow data. The AirNow data are not fully verified and validated through the quality assurance procedures monitoring organizations use to officially submit and certify data on the EPA AQS (Air Quality System) and, therefore, cannot be used to formulate or support regulation, guidance or any other Agency decision or position.

This report provides daily Air Quality Index values for the specified year and location. Read more about what's in this report.

Use the query tool below to get AQI data for one county or CBSA at a time. Click this link if you want a national file that lists all counties or CBSAs.


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Air Data