Delhi, Mumbai, Kolkata among world's 10 most polluted cities

Mumbai and Kolkata joined New Delhi to become the world's top 10 most polluted cities after Diwali.

Published on: Nov 13, 2023 4:52 PM IST

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Published on Nov 13, 2023 4:52 PM

The severe air pollution in South Asia is significantly disrupting the daily lives of millions, leading to school closures, affecting sports events, and prompting governments to advise people to stay indoors to prevent health issues. This region has emerged as a major global hotspot for air pollution, with studies revealing that four of the world's most polluted countries and nine out of the top 10 most polluted cities are located here. Among these, three major Indian cities—Delhi, Kolkata, and Mumbai—ranked in the top 10 most polluted cities globally.  (HT Photo/Sanchit Khanna)

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On Monday, Delhi secured the top spot as the world's most polluted city, with Kolkata ranking fourth and Mumbai securing the ninth position. These rankings were determined by IQAir, a Swiss group that assesses air quality in 100 major cities based on the concentration of PM2.5, which are airborne particles harmful to the lungs.  (HT Photo/Sanchit Khanna)

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New Delhi claimed the highest position with an air quality index (AQI) of 407, categorizing it as "hazardous," as reported by the Swiss group IQAir.  (HT Photo/Sanchit Khanna)

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Lahore in Pakistan secured the second position on the list with an Air Quality Index (AQI) of 384.  (AFP)

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Kolkata, situated in the east, held the fourth position on the list with an Air Quality Index (AQI) of 196.  (REUTERS)

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Mumbai, the financial capital, claimed the ninth spot on the list with an Air Quality Index (AQI) of 156.  (REUTERS)

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Mexico City has been declared the cleanest city in the world, securing the top position in the live ranking after initially being placed 100th.  (Unsplash)