Sixty-six of the 76 provinces in Thailand were shrouded with unsafe levels of ultrafine dust pollution on Wednesday morning, with the worst smog blanketing Greater Bangkok, according to the Geo-Informatics and Space Technology Development Agency (Gistda).

Thailand imposes burning ban to curb PM2.5 pollution

According to Gistda’s report at 7am, 26 provinces suffered red levels (hazardous to health) of particulate matter 2.5 micrometres and less in diameter (PM2.5) ranging from 77 to 135.1 microgrammes per cubic metre of air over the past 24 hours. The government-set safe level is 37.5µg/m³.

Full story: Bangkok Post

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