At 17, Mumbai recorded its best Air Quality Index (AQI) for this year on Thursday afternoon. It rose to 19 by evening. The lowest AQI for the year was recorded a day after the severe cyclonic storm Nisarga hit Maharashtra coast, bringing high-speed winds and washed away particulate matter (PM).
The concentration of PM 2.5 – tiny particulate matter less than 2.5 microns in diameter that can enter deep into the lungs and even the bloodstream – was recorded recorded at 17 on Thursday evening.
The World Health Organisation safe limit of 25 µg/m3 for 24 hours and 60 µg/m3, the national safety standard for PM 2.5. The lockdown has also had helped in keeping the city’s PM2.5 concentration below 60 µg/m3 since the last week of March.
The overall AQI for Friday is likely to be 19, said System of Air Quality and Weather Forecasting and Research (SAFAR).
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