Updated On: 08 January, 2021 08:57 AM IST | Mumbai | mid-day online correspondent
The first day of 2021 saw the highest January 1 pollution levels in 4 years.

A hazy Thursday evening at Poisar river in Malad, Mumbai | Pic: Satej Shinde
The System of Air Quality and Weather Forecasting (SAFAR) announced that Mumbai’s Air Quality Index (AQI) has clocked to 309 which means the city’s air quality is ‘very poor.’
The national capital has been suffering from very poor air quality for quite some time now, however, on Thursday, Delhi’s air quality stood at 200 which is moderate category.