North continues to be the most affected area, with really harmful dust levels.
On Monday night, a hazy amount of haze blanketed 37 of the 77 provinces, most of which were in the North, where residents of Chiang Rai experienced the worst levels of PM2.5 particles.
At 11 a.m. on Monday, the Geo-Informatics and Space Technology Development Agency ( Gistda ) announced that seven northern provinces had experienced red ( seriously harmful ) levels of particulate matter measuring 2.5 micrometers and less in diameter ( PM2.5 ) over the past 24 hours, with a range of 80 to 107.5 % per cubic meter of air. The authorities- set secure threshold is 37.5µg/m³.
The worst levels, 107.5, was measured in Chiang Rai, followed by 103.8 in Chiang Mai, 92.8 in Phayao, 87.8 in Mae Hong Son, 82.9 in Nan, 80.6 in Lamphun and 80.5 in Lampang.
Orange ( initially unsafe ) levels of PM2.5 were detected in 30 other provinces, mostly in the Northeast. They ranged from 37.9 to 72.4µg/m³.
The regions were, in descending purchase, Loei, Tak, Phrae, Uttaradit, Nong Khai, Nong Bua Lam Phu, Bueng Kan, Udon Thani, Sakon Nakhon, Nakhon Phanom, Sukhothai, Phitsanulok, Kalasin, Khon Kaen, Chaiyaphum, Mukdahan, Kamphaeng Phet, Phetchabun, Amnat Charoen, Maha Sarakham, Nakhon Ratchasima, Buri Ram, Roi Et, Ubon Ratchathani, Uthai Thani, Yasothon, Surin, Si Sa Ket, Kanchanaburi and Phichit.
The air quality was mild and good in the lower Central Plains, East, and South. Samut Songkhram had the best air quality with 15.0µg/m ³ of PM2.5, followed by Narathiwat with 15.4µg/m³.
Srettha Thavisin, the prime minister, stated on social media on Monday that the state was working to reduce dust and assist the afflicted, but burning continued to occur in the nation and outside.  ,
Nirat Pongsitthaworn, governor of Chiang Mai, stated to reporters on Monday that local authorities may have face masks and fresh air in waiting areas for residents.
According to the Chiang Mai University Faculty of Medicine, PM2.5 waste had a significant impact on heart and lung patients and was a big contributor to the rise in lung cancer. Over the past two days, the number of individuals with head bleeding, eye irritation, pneumonia and rashes had , increased.