• Tuesday, Apr 07, 2020
  • Last Update : 06:47 pm

Air quality: Pollution at Gulshan, Baridhara worsens by evening

  • Published at 02:22 pm February 26th, 2020
Air_Pollution-Mehedi-Hasan
Air polution in Dhaka Mehedi Hasan/Dhaka Tribune

It has an average score of 156 which was classified as unhealthy

Upscale residential areas of Dhaka continue to show a rise in air pollution as the day progresses into the night. 

According to Air Visuals at 8pm on Wednesday, Gulshan and Baridhara showed a worsening air quality with an AQI (Air Quality Index) score of 171 and 180 respectively, classified as “unhealthy.”

Earlier in the morning at 8am, the two areas showed an AQI score of 156 and 167 respectively.

Dhaka topped the chart on Tuesday with an AQI score of 215 at 8:40pm. The air was classified as "very unhealthy."

When the AQI value is between 201 and 300, a city dweller is more likely to be affected and people with respiratory diseases are advised to limit outdoor activities.

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.

In Bangladesh, the AQI is based on five criteria pollutants – Particulate Matter (PM10 and PM2.5), NO2, CO, SO2, and Ozone (O3).

The Department of Environment has also set national ambient air quality standards for these pollutants. These standards aim to protect against adverse human health impacts.

Dhaka has long been grappling with air pollution. Its air quality usually improves during monsoon.