Three major Indian cities – Delhi, Kolkata and Mumbai – are in the top 10. Kolkata is fourth on the list with an AQI of 196, followed by Mumbai in ninth place with an AQI of 156.
A day after Diwali, Delhi ranked as the world’s most polluted city on Monday, according to IQAir, a Swiss group that measures the air quality levels of 100 major cities based on the concentration of suspended particles in air. air, which is harmful to lung health, is called PM2.5.
According to IQAir, the Indian national capital recorded an air quality index (AQI) of 433, in the ‘hazardous’ category, as of 10 am. Lahore, Pakistan ranks second on the list with an AQI of 384.
IQAir’s report said PM2.5 concentrations in Delhi are currently 79 times higher than the WHO’s annual air quality guideline value. Three major Indian cities – Delhi, Kolkata and Mumbai – are in the top 10. Kolkata is fourth on the list with an AQI of 196, followed by Mumbai in ninth place with an AQI of 156.
Mexico City has been declared the cleanest city in the world according to a live ranking after being ranked 100th.
The AQI displayed by IQAir is based on the American legend of air pollution criteria. The rankings are divided into 6 groups, with 0-50 being “good” and 301+ being “dangerous”. AQI at 51-100 is considered moderate, while at 101-150 and 151-200 it is considered “unhealthy for sensitive groups” and “unhealthy”. At the other extreme, an AQI of 201 to 300 is “very unhealthy.”
PM10 and PM2.5 levels spiked in some parts of Delhi on Sunday night as people burst off Diwali firecrackers despite the ban. According to the government’s Central Pollution Control Board (CPCB), the city’s AQI, a 24-hour average, remained in the ‘poor’ category. It was recorded at 283 at 8am on Monday, after falling from 218 at 3pm on Sunday. These are the best AQI Diwali figures seen in Delhi in the last eight years.
Last year, the AQI was 312 on Diwali, while it was 382 in 2021, 414 in 2020, 337 in 2019 and 281 in 2018. The AQI was 342 on Diwali in 2015, 431 in 2016 and 319 in year 2017.
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