PM2.5 pollution decreases slightly for most of Bangkok

Air Quality Information Centre reports lower levels of smog for most of Thai capital but Bang Na and Lat Krabang still high

The air quality in 44 districts of the Bangkok metropolitan area slightly exceeded the safety standard on Wednesday morning, the Air Quality Information Centre of the Bangkok Metropolitan Administration (BMA) said.

The centre reported the average PM2.5 levels throughout the city on Wednesday at 40.7 micrograms per cubic metre (µg/m³), slightly above the country’s standard of 37.5 µg/m³ over a three-hour average (5am to 7am).

Yesterday’s reading at the same time was at 44.9 µg/m³.



PM2.5 refers to fine particulate matter with a diameter of 2.5 micrometres or less, which can penetrate deep into the lungs and bloodstream, posing health risks such as respiratory and cardiovascular diseases.

Major sources of PM2.5 include traffic emissions, factories, forest fires, and burning of harvest leftovers.

The five districts that reported the highest levels of PM2.5 are Lat Krabang (52.7 µg/m³), Bang Na (52.3 µg/m³), Thawi Watthana (49.7 µg/m³), Khlong Sam Wa (48.7 µg/m³), and Bang Khun Thian (47.3 µg/m³).

The centre advised Bangkokians to wear facemasks, avoid spending time outdoors and work from home if possible.

Those who experience symptoms such as coughing, eye irritation or having trouble breathing should see a physician, the centre added.

Air quality can be checked daily on the AirBKK application, www.airbkk.com, Line Alert, as well as the Facebook page of the BMA’s Environment Department.

(2025/02/05-00:00)