Dhaka, the overcrowded capital city of Bangladesh, has ranked 4th on the list of cities with the worst air quality with an Air Quality Index score of 207 at about 9:04am on Tuesday.
Dhaka鈥檚 air was classified as 鈥榲ery unhealthy鈥�, according to the air quality and pollution city ranking.
India鈥檚 Delhi, Pakistan鈥檚 Lahore and India鈥檚 Kolkata occupied the first, second and third spots in the list, with AQI scores of 389, 239 and 225, respectively.
When the AQI value for particle pollution is between 101 and 150, air quality is considered 鈥榰nhealthy for sensitive groups鈥�, between 150 and 200 is 鈥榰nhealthy鈥�, between 201 and 300 is said to be 鈥榲ery unhealthy鈥�, while a reading of 301 and above is considered 鈥榟azardous鈥�, posing serious health risks to residents.
The AQI, an index for reporting daily air quality, informs people how clean or polluted the air of a certain city is and what associated health effects might be a concern for them.
The AQI in Bangladesh is based on five pollutants: particulate matter (PM10 and PM2.5), NO2, CO, SO2, and ozone.
Dhaka has long been grappling with air pollution issues. Its air quality usually turns unhealthy in winter and improves during the monsoon.
