A day after Diwali, the air quality in Mumbai remained in the 'poor' category with the overall air quality index (AQI) at 290.According to the System of Air Quality and Weather Forecasting And Research (SAFAR), the AQI in the overall Mumbai region was in the 'very poor' category at.

In Andheri, AQI was in 'very poor' category at 358. In BKC and Borivali, the AQI remained 'poor' at 293 and 232 respectively. In Chembur and Malad, AQI was 'very poor' at 319 and 375 respectively.