Last updated on May 13th, 2021 at 05:44 am
Chiang Mai province was hit by unprecedented levels of air pollution on Wednesday as intensifying forest fires sent PM2.5 levels in some areas up to 592 microgrammes per cubic metre (ug/m3) of air, almost 12 times above safe levels.
The level of PM2.5 — fine dust that can get lodged in lungs and cause coronary disease — rose to 592 ug/m3 at Chiang Mai University’s Mae Hia Campus in Muang district, and at 321 ug/m3 at a school in Hang Dong district, according to data from Chiang Mai University’s Climate Change Data Centres (CMU-CCDC), the most popular air-monitoring network used by locals. The CMC-CCDC network gathers air-quality data from air-monitoring kits set up at community level across the North. This system provides real-time air-pollution measures as it is close to the pollution source, while the air-monitoring system run by the Pollution Control Department (PCD) provides a general average over 24 hours. Thailand’s safe threshold for PM2.5 stands at 50 ug/m3, while the World Health Organisation’s is set it at 25 ug/m3.
A fire erupted yesterday in Doi Suthep-Pui National Park in Hang Dong district, which had to be doused by helicopters, Mr Komsan said. Meanwhile, the fire-control centre reported that 218 hotspots in 18 districts in Chiang Mai have been detected by the Geo-Informatics and Space Technology Development Agency (GISTDA). Pralong Dumrongthai, director-general of the PCD, said that as forest fire hotspots in the North continue rising due to arson, open burning and pollution from bush fires set in neighbour countries, PM2.5 and PM10 particles will continue polluting the air. He added that six pollution control stations detected severely hazardous levels in their areas. Known for providing conservative readings, even the PCD air-monitoring system showed alarming pollution levels yesterday. For instance, the PM2.5 level in Doi Suthep area was measured at 234 ug/m3 and was 212 ug/m3 in Chiang Dao district.
The authorities are offering a 5,000 baht bounty and imposing such as 1 to 30 years in prison and fines of 10,000 to 3 million baht for the crimes.
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