Mumbai's Overall Air Quality Index (AQI) Is Worse Than Delhi. As Per The Indian Institute Of Tropical Meteorology-Managed System Of Air Quality Forecast & Research (SAFAR), At 6 Pm On October 18, The PM10 Level In Mumbai's Air Was 143 As Against 122 In Delhi, Reported PTI. Poor AQI Is Present In Several Suburbs As Well. The City Has Experienced An Increase In Heat For A Week After The Monsoon Departed, With Average Daily Maximum Temperatures Between 32 And 34 Degrees.