Chiang Mai and Bangkok were ranked sixth and ninth most polluted cities in the world for air quality respectively on Tuesday morning, according to Iqair.com
Chiang Mai was reported with a US AQI of 184 and Bangkok with 176 as of 10 am.
Chiang Mai was shrouded by smog from forest fires with low visibility. A total of 87 hotspots were detected in the province on Monday.
Four Northern provinces – Chiang Mai, Chiang Rai, Mae Hong Son and Lamphun reported 312 hotspots today.
PM 2.5 levels in Chiang Mai’s Muang district were measured between 74-85 micrograms per cubic metre and as high as 113 micrograms per cubic metre in Hod district.
Levels of ultra-fine dust particles (PM2.5) exceeded the safety threshold in the capital, measured between 61-93 micrograms per cubic meters, reported the Bangkok Metropolitan Administration. People are advised to refrain from outdoor activities and to wear a mask when going out. (TNA)