Dhaka’s air quality showed a slight improvement on Sunday afternoon with the capital city ranking sixth worst in the Air Quality Index (AQI) due to rain triggered by depression in the Bay of Bengal.
Dhaka had an AQI score of 159 at 15:22 pm and its air quality was still classified as ‘unhealthy’.
Dhaka’s air quality usually turns unhealthy during winter and improves during monsoon.
India’s Delhi, Pakistan’s Lahore and China’s Chengdu occupied the top three spots respectively with scores of 187, 179 and 175.
Read:Bay depression triggers drizzle in parts of Bangladesh
An AQI between 101 and 200 is considered 'unhealthy', particularly for sensitive groups.
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.
Depression & drizzles
Daylong drizzles disrupted normal life in the capital and some other parts of the country as cyclonic storm ‘Jawad’ weakened into a deep depression over the Bay of Bengal on Sunday.
“The Met office has recorded 1 mm rain in the city till 9 am on Sunday and light showers are likely to continue till Monday due to the deep depression,” metrologist Hafizur Rahman told UNB.
The day started with a cloudy sky in the capital and people who stepped out of home in the morning without preparations to tackle rains suffered a lot.
Commuters had to wait for a long time to manage any transport to go to their respective destinations.
Traffic constables were seen too busy controlling traffic as drizzles caused traffic chaos in some areas in the morning.
According to a Met office bulletin, “Light to moderate rains or thunder showers accompanied by temporary gusty wind are likely to occur at most places over Khulna, Barishal, Chattogram and Dhaka divisions; and at many places over Rajshahi, Mymensingh and Sylhet divisions and at one or two places over Rangpur division with moderately heavy falls at isolated places over the country.”
Night temperature may remain nearly unchanged and day temperature may fall slightly over the country.