Most Polluted Cities — December 2021

157 cities tracked · Average AQI: 180 (Moderate)

Historical air quality for December 2021: India's most polluted cities, ranked from 0 days of CPCB readings across 157 cities. The national average AQI for the month was 180 (Moderate). Delhi, Delhi was the most polluted city in December 2021 with a monthly average AQI of 336.