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Outdoor Air Quality Data

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Air Data - Concentration Plot

Use of AirNow Data

This plot 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 tool displays daily air quality summary statistics for the criteria pollutants by monitor. You can plot all monitors in a city or county, or you can select a specific monitor.

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Air Data