Air Quality Index Report
Ozone AQI Breakpoints
The AQI breakpoints for ozone were updated on June 21, 2016 to be consistent with the 2015 ozone standards. This update applies to all historical data as well. For more information, see the table on page 2 of the Updates to the Air Quality Index (AQI) for Ozone and Ozone Monitoring Requirements (PDF).
This report provides Air Quality Index annual summary information, including maximum AQI values and the count of days in each AQI category. Read more about what's in this report.