Most Polluted Cities — September 2017

21 cities tracked · Average AQI: 126 (Moderate)

Historical air quality for September 2017: India's most polluted cities, ranked from 0 days of CPCB readings across 21 cities. The national average AQI for the month was 126 (Moderate). Ludhiana, Punjab was the most polluted city in September 2017 with a monthly average AQI of 386.