Air Data - Ozone Exceedances

Data from AirNow

The data for the current year is from AirNow and is presented with baseline data from AQS for comparison only. 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.

How does this year compare with previous years? Compare 8-hour ozone exceedances between two years or multi-year periods for a city or county. The first plot shows the comparisons by MONTH. The second plot shows the comparisons by DAY based on cumulative counts. The third plot shows the comparisons by YEAR.


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Outdoor Air Quality Data

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Last updated on March 28, 2025