Dhaka's Air Quality Improves

File Photo: Collected

File Photo: Collected

Dhaka's air quality has seen a marked improvement in the past 24 hours, all thanks to intermittent monsoon showers.

With an air quality index (AQI) score of 98 or 'moderate' at 9am on Saturday, the metropolis ranked 10th in the list of world cities with the worst air quality, reports UNB.  

Saudi Arabia’s Riyadh, the United Arab Emirates' Dubai and Pakistan’s Lahore occupied the first three spots in the list, with AQI scores of 170, 160 and 156, respectively.

An AQI between 50 and 100 is considered ‘moderate’ with an acceptable air quality. However, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

On the other hand, an AQI between 101 and 200 is considered 'unhealthy', particularly for sensitive groups.

Similarly, an AQI between 201 and 300 is said to be 'poor', while a reading of 301 to 400 is considered 'hazardous', posing serious health risks to residents.

AQI, an index for reporting daily air quality, is used by government agencies to inform people how clean or polluted the air of a certain city is, and what associated health effects might be a concern for them.

In Bangladesh, the AQI is based on five criteria pollutants -- Particulate Matter (PM10 and PM2.5), NO2, CO, SO2 and Ozone.

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