On Monday morning, the majority of the North’s regions were covered in risky red-coded PM2.5 amounts, with Chiang Mai receiving the worst air pollution in the world.
At 8 a.m. on Monday, the Geo-Informatics and Space Technology Development Agency ( Gistda ) announced that 11 provinces had experienced red ( seriously harmful ) PM2.5 levels, ranging from 82.1 microgrammes per cubic meter of air over the past 24 hours. The healthy level is at 37.5µg/m³.
The worst levels, 158.8, was measured in Chiang Rai, followed by 141.9 in Chiang Mai, 136.4 in Lamphun, 131.6 in Phayao, 128.2 in Mae Hong Son, 118.6 in Lampang, 102.3 in Phrae, 94.9 in Nan, 87.8 in Sukhothai, 85.5 in Uttaradit and 82.1 in Tak. All of them are northern regions.
Orange ( initially unsafe ) levels of PM2.5 were detected in 46 other provinces, mostly in the Northeast and the Central Plains. They ranged from 38.2 to 67.6µg/m³.
The counties were, in descending purchase, Loei, Kamphaeng Phet, Phitsanulok, Phetchabun, Chaiyaphum, Phichit, Nakhon Sawan, Khon Kaen, Uthai Thani, Bangkok, Maha Sarakham, Kanchanaburi, Mukdahan, Kalasin, Roi Et, Pathum Thani, Nonthaburi, Nong Bua Lam Phu, Chai Nat, Nakhon Ratchasima, Ubon Ratchathani, Ratchaburi, Si Sa Ket, Amnat Charoen, Yasothon, Samut Prakan, Lop Buri, Udon Thani, Nong Khai, Phetchaburi, Prachuap Khiri Khan, Nakhon Pathom, Suphan Buri, Samut Sakhon, Ayutthaya, Nakhon Nayok, Sing Buri, Surin, Bueng Kan, Buri Ram, Samut Songkhram, Ang Thong, Saraburi, Prachin Buri, Sakon Nakhon and Nakhon Phanom.
The air quality in the East and the South was mild and fine. Phuket had the best air quality with 15.3µg/m ³ of PM2.5, followed by Phangnga with 15.7µg/m³. Both are in the South.
Chiang Mai, the fourth-highest city in the world in terms of air pollutants, was ranked on Monday night by European atmosphere quality technology company IQAir, after Delhi, Lahore, and Kathmandu.
On Monday night, the Gistda map displays dark PM2.5 levels in the north.