Thailand’s standard for safe levels of PM2.5 (particles less than 2.5 micrometres in diameter) is 50 micrograms per cubic metre (μg/m3), while the World Health Organisation sets it at 25 μg/m3.
PM2.5 readings as of Tuesday morning:
North: 16 to 127 μg/m3.
Northeast: 9 to 21 μg/m3.
Central region and West: 13 to 33 μg/m3.
East: 19 to 37 μg/m3.
South: 11 to 22 μg/m3.
Bangkok and its vicinity: 31 to 63 μg/m3.
The Bangkok Air Quality and Noise Management Division said air quality was unsafe in 36 Bangkok districts, with Khlong San district having the worst PM2.5 reading at 63 μg/m3.
Published : March 23, 2021
By : The Nation