The dense fog reached a serious level of danger (red) in Bangkok and 12 provinces in the Central and Eastern Delta on the morning of December 2 (local time), when most of Thailand was covered by air pollution exceeding the safe threshold.
The Geophysical and Space Technology Development Agency (Gistda) said that at 8:00 a.m. on December 2 (local time), the concentration of PM2.5 fine dust (with a diameter of 2.5 micrometers or less) was at red, ranging from 75.2 to 92.3 micrometers/m3. The safety level set by the government is 37.5 micrograms/m3.
The highest level, 92.3, was recorded in Samut Prakan province, followed by Bangkok (89.6), Chachoengsao (88.4), Rayong (88.1), Samut Sakhon (87.7), Chon buri (87.6), Nonthaburi (87.3), Pathum Thani (85.2), Prachin buri (83.2), Nakhon pathom (82.2), Chanthaburi (78.6), Trat (76.2) and Phetchaburi (75.2).
All 50 districts of Bangkok were submerged in red PM2.5 levels, ranging from 87.7 to 91.7 micrograms/m3 - the highest in Thung Khru district.
Orange PM2.5 levels ( begun to affect health), ranging from 39.6 to 72.3 micrograms/m3, were recorded in 30 provinces in Central, Eastern and Northeastern Thailand.
Meanwhile, 24 provinces have good or very good air quality, mainly in the South and some in the North and east of the Northeast, with PM2.5 levels ranging from 9.2 to 25 micrograms/m3.
The air quality was average, with PM2.5 ranging from 25.2 to 36.8 micrgrams per cubic meter, recorded at Loei, Uttaradit, Surin, Chiang Rai, Nan, Lampang, Surat Thani, Sakon Nakhon, Ranong and Nakhon Si Thammarat.
The Thai Meteorological Department forecasts that the prison air will appear from December 9 to December 10. From December 11 to 13, PM2.5 fine dust levels may decrease due to forecasts of rain.
