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Outdoor Air Quality Data

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Air Data - AQI 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.

Compare AQI values for multiple pollutants for a specific location and time period. This tool displays an entire year of AQI values - two pollutants at a time - and is useful for seeing how the number of unhealthy days can vary throughout the year for each pollutant.


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Air Data