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Delhi topped the list of the world’s most polluted cities on Friday with an Air Quality Index (AQI) score of 342, while Dhaka ranked fourth with a score of 173.
According to Switzerland-based air quality monitoring organisation IQAir, Dhaka’s air quality was classified as ‘unhealthy’ at 8:30am on Friday.
Pakistan’s Lahore ranked second with an AQI score of 197, followed by India’s Kolkata with 192. Manila in the Philippines ranked fifth with a score of 171.
IQAir provides real-time air quality data for cities worldwide. According to its classification, an AQI score of 0-50 indicates good air quality, while 51-100 is moderate.
Scores between 101 and 150 are considered unhealthy for sensitive groups, while 151-200 indicate unhealthy air quality. Scores of 201-300 are classified as very unhealthy, and readings above 300 are considered hazardous.