Air quality in North 'critical'Air pollution across the upper North remains at critical levels with authorities monitoring almost 400 active hotspots in Chiang Mai alone yesterday. Government spokeswoman Narumon Pinyosinwat said fires have undoubtedly affected air quality, with 17 provinces in the North reporting an increase in levels of hazardous, ultra-fine PM2.5 pollutants yesterday. Only Nakhon Sawan and Uthai Thani reported PM2.5 readings below the Pollution Control Department's "safe" threshold, set at 50 microgrammes per cubic metre (μg/m³). Chiang Dao district in Chiang Mai reported the highest PM2.5 reading in the North yesterday at 360μg/m³. As of yesterday, 398 hotspots -- or almost 10% of the country's hotspots -- were found in Chiang Mai.
Source: Bangkok Post March 29, 2020 20:26 UTC