AQI (Air Quality Index) is a composite index of 5 major pollutants- particulate matter (PM2.5, PM10) sulfur dioxide, carbon monoxide, NO2 and Ozone. The following city profiles display the average of all 24-hour averages over a span of 10 days in 6 major cities in India. 

Given below is the color-coded scale depicting the varying levels of air quality and associated risks to human health.