An air force plane drops water above Muang district of Chiang Rai to help clean the dust from the air and lighten the choking smog, on Tuesday. (Photo: Public Relations Department)
Parts of the upper North and Northeast remained cloaked in hazardous levels of smoke haze on Tuesday, with with the worst pollution still in Chiang Rai’s Mae Sai district.
The Pollution Control Department reported unsafe and red-coded levels of particulate matter 2.5 micrometres and less in diameter (PM2.5) in the northern provinces of Chiang Mai, Chiang Rai, Lamphun, Lampang, Mae Hong Son, Nan, Phayao and Phrae.
Their PM2.5 levels ranged from 99 to 517 microgrammes per cubic metre (μg/m³) of air over 24 hours as of 10am on Tuesday. The…
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