Delhi most polluted city in the world on Friday; Kolkata, Mumbai in top 10 list
India | November 15, 2019 13:34 ISTDelhi has earned the dubious distinction of becoming the most polluted major city in the world with an air quality index (AQI) of 527 on Friday, as per data by Air Visual on the World AQI rankings. The Air Visual data is updated frequently, so the caveat is that rankings and AQI counts change accordingly during the day itself.