Air Data - Multiyear Tile Plot

Use of AirNow Data

This plot provides ozone, PM2.5, and PM10 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.

Plot daily AQI values for a specific location and time period. Each “tile” represents one day of the year and is color-coded based on the highest daily AQI value at the selected monitor - or among all monitors in the geographic area if "All Sites (Highest Daily AQI)" is selected.

  2. from to   (Maximum 25 years / Query time: 15 years ~ 30 sec, 25 years ~ 1 min)

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Last updated on November 24, 2023