PUBLISHED: 22 Jan 2025 at 10:18
Ultrafine dust levels were in the red ( hazardous-to-health ) in 46 out of the 76 provinces and in Greater Bangkok on Wednesday morning, with only 10 provinces reporting moderate to good air quality.
The Geo-Informatics and Space Technology Development Agency ( Gistda ) reported at 8am that particulate matter 2. 5 micrometres and less in size ( PM2. 5 ) was at red levels in 46 provinces and at orange ( starting to affect health ) levels in 21 provinces. Most were in the Central Plain, the Northeast and the East.
The highest levels of PM2. 5 recorded over the preceding 24 days was 151. 1 microgrammes per square metre of air in Samut Sakhon state, followed by 125. 1µg/m ³ in Samut Songkhram, 121. 1 in Saraburi, 115. 7 in Phetchaburi, 111. 7 in Lop Buri, 110. 1 in Ratchaburi, 108 in Pathum Thani, 106. 5 in Nakhon Pathom, 106. 4 in Ayutthaya, 106. 2 in Kalasin, 105. 5 in Rayong, 104. 9 in Maha Sarakham, 102. 4 in Sa Kaeo, 102. 3 in Ang Thong, 101. 6 in Samut Prakan, 100. 1 in Sing Buri and Chon Buri and 100 in Bangkok.
The government-set secure level is 37. 5µg/m³.
Twenty-eight different regions were at two-digit purple levels of PM2. 5, ranging from 76. 6 to 98. 3µg/m³.
In descending attempt, they were Nonthaburi Chai Nat, Si Sa Ket, Khon Kaen, Nakhon Ratchasima, Chachoengsao, Suphan Buri, Roi Et, Surin, Buri Ram, Kanchanaburi, Nong Khai, Uthai Thani, Nakhon Pathom, Phetchabun, Ubon Ratchathani, Nakhon Sawan, Sukhothai, Kamphaeng Phet, Phitsanulok, Prachin Buri, Chaiyaphum, Prachuap Khiri Khan, Loei, Chanthaburi, Udon Thani, Yasothon and Sakon Nakhon.
Safe levels of PM2. 5 were recorded in 10 northern and southern regions.
Eight of them had average weather quality with golden levels of PM2. 5 ranging from 26 to 36. 4µg/m³.
In descending attempt, they were Lamphun, Phangnga, Ranong, Surat Thani, Chumphon, Nakhon Si Thammarat, Krabi and Chiang Rai.
Two regions had fine weather quality ( natural levels of PM2. 5 ) namely Chiang Mai ( 20. 1µg/m³ ) and Mae Hong Son ( 16. 1 ).
Twenty-one other regions were shrouded with peach levels of PM2. 5 ranging from 38 to 74. 8µg/m³.
This Gistda image shows rates of PM2. 5 in various shades in Thailand at 8am on Wednesday.