On Thursday, January 7, according to the System of Air Quality Weather Forecasting And Research (SAFAR), the air quality in Mumbai' dropped to 'very poor' category, with overall air quality index (AQI) standing at 309.
Moreover, as per the weather forecasting and research body, the AQI of Mumbai today is poor because of low dispersion and low-temperature variation. In addition, local emissions will lead to poor AQI for Mumbai for the next two days.
On the first day of 2021, the city had clocked the highest pollution levels in four years. While lower than December 31, Mumbai's overall AQI of 307 was still in the very poor category. Besides, it was also observed that the air quality in and around Mumbai deteriorated from ‘poor’ to ‘very poor’ for the first time in 2020 on New Year's Eve, December 31. Experts attributed the very poor quality of air to the inflow of air from the land (continental air) instead of that from the sea.
In the past, the Mumbai air quality in and around the Mumbai Metropolitan Region (MMR) improved slightly from poor to moderate on December 28. An overall air quality index (AQI)—a pollutant measuring indicator of 180 (moderate) was recorded.
The AQI was calculated by SAFAR as the average of indices recorded at 10 locations in the city and suburbs. Moreover, SAFAR categorizes AQI levels for PM2.5 in the 0-50 range as good; 51-100 as satisfactory; 101-200 as moderate; 201-300 as poor; 301-400 as very poor and above 400 as severe.
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