Anand Vihar recorded an Air Quality Index (AQI) of 387 at 10 am on Saturday, which was the worst in Delhi. Several other areas also recorded an AQI of above 300, including RK Puram (352), Terminal 3 of Indira Gandhi International Airport (338), Punjabi Bagh (328), Ashok Vihar (315) and Burari Crossing (311).