Air Data - Daily Air Quality Tracker
Track the most recent daily AQI values relative to the 20-year high and low and the average of the last five years.
More information: The most recent AQI values are based on available ozone and PM2.5 data from AirNow (see "Use of AirNow Data" info box). The 20-year high/low backdrop is based on AQS data from 2000-2019. It shows the range of the highest and lowest daily max AQI values on each date. The 5-year average is based on AQS data from 2015-2019. It shows the average of daily max AQI values on each date.