Air Quality Index Graph

This graph indicates the AQI for a specific monitor and pollutant. Select any site, date, parameter and time frame. The color of the bars indicates the AQI level. The AQI for each pollutant is calculated using a standard averaging interval: PM 24-hr; O3 8-hr; CO, SO2 and NO2 1-hr.

Ozone monitoring has concluded for 2018 and will resume on March 1, 2019. Only the Taft site will display a graphfor ozone.

Please wait while page loads. Data not Quality Assured. For National Ambient Air Quality Standards, click here. For more information or to obtain historical data, please contact us.

Please note: The Made SO2 site is offline, as it is currently being relocated.