The Current Air Quality Index reflects the predominant air pollutant (either PM2.5, PM10, or Ozone*) which is the pollutant with the highest reading in the monitoring network. It is updated hourly. The map below provides information for each monitoring site in the network. Clicking on a specific site will take you to a new window where you can access current day and five-day hourly AQI histories for the air pollutants measured at that site. Learn more here.
*Ozone is only measured during ozone season, May-September.
Fine Particulate Matter (PM2.5) is the predominant air pollutant in the current hour.
Updated 2021-04-23 06:35:00 am
Click a location on the map for more information.
Fine Particulate Matter (PM2.5) monitoring stations (AQI value)
Other Pollutant Monitoring Stations