Printed on Sat Aug 13 2022 3:37:16 PM

Dhaka's air quality back to “unhealthy”

Staff Correspondent

After a marked improvement in the past few days, Dhaka's air quality slipped back to the 'unhealthy for sensitive groups' zone on Tuesday.

With an air quality index (AQI) of 121, recorded at 9am, the metropolis ranked eighth in the list of world cities with the worst air quality.

The UAE's Dubai, Indonesia's Jakarta, and Chile's Santiago occupied the first three spots in the list, with AQI scores of 186, 158, and 156, respectively.

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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