SmogRank / Episodes / Thailand

Western Thailand, February 2024

For 8 days, from 13 to 20 February 2024, 51 cities in Thailand had PM2.5 at least twice their usual for the time of year. The worst reading was Kanchanaburi, Kanchanaburi, Thailand: 109.0 µg/m³ on 15 February, about 3.2× its usual 34.3.

No cause namedWe have no fire or smoke records for these days, so we only say what the measurements show.
Cities reached51in 1 country
Days813 to 20 February 2024
Worst day15 February30 cities counted
Furthest above usual3.4×Sukhothai

Day by day

15 February 30 cities at twice their usual or more
Nakhon RatchasimaKhlong Sam WaBang Bo DistrictBan Talat BuengBang Khun ThianSing BuriChaiyaphumSurinTratNakhon SawanKhon KaenPhichitKalasinUttaraditMae SotPhraePakxanNanLamphunChiang MaiChai NatPhetchabunNakhon NayokBan ChangLak SiRoi EtSakon NakhonSi Sa KetUdon ThaniSai MaiBang NaNong ChokRanongUbon RatchathaniKamphaeng PhetLampangSi Maha PhotPhetchaburiSaphan SungKhan Na YaoKhlong LuangMueang NonthaburiPhra Nakhon Si AyutthayaRayongSuphan BuriNong Bua LamphuBueng KumLaem ChabangBan Khlong PrawetChanthaburiBangkokNong KhaemRatchaburiLoeiYasothonLat KrabangAranyaprathetPhra PradaengBang KapiBan Samae DamNakhon PathomAmnat CharoenBuri RamLop BuriSaraburiMukdahanHua HinSamut PrakanSamut SakhonKanchanaburiSukhothai
10 Feb11121314151617181920212223
Every measured city in the area, coloured by its PM2.5 that day; a dark ring marks a city at twice its usual or more. Bars: cities counted each day, coloured by their median level. Choose a day or press play; without JavaScript, the days link to that day's world ranking.

How it spread

LampangLampang, 10 February: 89.0 µg/m³, 2.0× usualLampang, 11 February: no readingLampang, 12 February: no readingLampang, 13 February: 59.5 µg/m³, 1.4× usualLampang, 14 February: 58.3 µg/m³, 1.3× usualLampang, 15 February: 69.7 µg/m³, 1.6× usualLampang, 16 February: 85.4 µg/m³, 1.9× usualLampang, 17 February: 98.0 µg/m³, 2.2× usualLampang, 18 February: 92.1 µg/m³, 2.1× usualLampang, 19 February: 80.5 µg/m³, 1.8× usualLampang, 20 February: 68.8 µg/m³, 1.6× usualLampang, 21 February: 49.8 µg/m³, 1.1× usualLampang, 22 February: 64.7 µg/m³, 1.5× usualLampang, 23 February: 95.9 µg/m³, 2.2× usualSukhothaiSukhothai, 10 February: 69.8 µg/m³, 2.2× usualSukhothai, 11 February: no readingSukhothai, 12 February: no readingSukhothai, 13 February: 77.4 µg/m³, 2.5× usualSukhothai, 14 February: no readingSukhothai, 15 February: 89.8 µg/m³, 2.9× usualSukhothai, 16 February: 88.5 µg/m³, 2.8× usualSukhothai, 17 February: 106.0 µg/m³, 3.4× usualSukhothai, 18 February: 68.2 µg/m³, 2.2× usualSukhothai, 19 February: 66.1 µg/m³, 2.1× usualSukhothai, 20 February: 53.7 µg/m³, 1.7× usualSukhothai, 21 February: 52.8 µg/m³, 1.7× usualSukhothai, 22 February: 51.1 µg/m³, 1.6× usualSukhothai, 23 February: 51.1 µg/m³, 1.6× usualSamut SakhonSamut Sakhon, 10 February: 22.9 µg/m³, 0.7× usualSamut Sakhon, 11 February: 35.9 µg/m³, 1.2× usualSamut Sakhon, 12 February: 59.8 µg/m³, 1.9× usualSamut Sakhon, 13 February: 80.8 µg/m³, 2.6× usualSamut Sakhon, 14 February: 95.0 µg/m³, 3.1× usualSamut Sakhon, 15 February: 75.0 µg/m³, 2.4× usualSamut Sakhon, 16 February: 36.2 µg/m³, 1.2× usualSamut Sakhon, 17 February: 22.4 µg/m³, 0.7× usualSamut Sakhon, 18 February: 18.2 µg/m³, 0.6× usualSamut Sakhon, 19 February: 18.5 µg/m³, 0.6× usualSamut Sakhon, 20 February: 13.5 µg/m³, 0.4× usualSamut Sakhon, 21 February: 14.9 µg/m³, 0.5× usualSamut Sakhon, 22 February: 12.4 µg/m³, 0.4× usualSamut Sakhon, 23 February: 13.4 µg/m³, 0.4× usualLak SiLak Si, 10 February: 30.3 µg/m³, 0.9× usualLak Si, 11 February: 41.8 µg/m³, 1.2× usualLak Si, 12 February: 50.3 µg/m³, 1.4× usualLak Si, 13 February: 70.4 µg/m³, 2.0× usualLak Si, 14 February: no readingLak Si, 15 February: 67.2 µg/m³, 1.9× usualLak Si, 16 February: no readingLak Si, 17 February: no readingLak Si, 18 February: no readingLak Si, 19 February: no readingLak Si, 20 February: no readingLak Si, 21 February: no readingLak Si, 22 February: no readingLak Si, 23 February: no readingBan Samae DamBan Samae Dam, 10 February: 32.2 µg/m³, 1.0× usualBan Samae Dam, 11 February: 46.7 µg/m³, 1.4× usualBan Samae Dam, 12 February: 57.8 µg/m³, 1.8× usualBan Samae Dam, 13 February: 70.1 µg/m³, 2.1× usualBan Samae Dam, 14 February: 79.2 µg/m³, 2.4× usualBan Samae Dam, 15 February: 73.8 µg/m³, 2.3× usualBan Samae Dam, 16 February: 42.3 µg/m³, 1.3× usualBan Samae Dam, 17 February: 33.9 µg/m³, 1.0× usualBan Samae Dam, 18 February: 31.1 µg/m³, 1.0× usualBan Samae Dam, 19 February: 29.1 µg/m³, 0.9× usualBan Samae Dam, 20 February: 19.3 µg/m³, 0.6× usualBan Samae Dam, 21 February: 20.4 µg/m³, 0.6× usualBan Samae Dam, 22 February: 19.6 µg/m³, 0.6× usualBan Samae Dam, 23 February: 19.8 µg/m³, 0.6× usualBang KapiBang Kapi, 10 February: 30.5 µg/m³, 1.0× usualBang Kapi, 11 February: 43.7 µg/m³, 1.4× usualBang Kapi, 12 February: 53.1 µg/m³, 1.7× usualBang Kapi, 13 February: 69.1 µg/m³, 2.2× usualBang Kapi, 14 February: 77.0 µg/m³, 2.4× usualBang Kapi, 15 February: 74.6 µg/m³, 2.3× usualBang Kapi, 16 February: 50.7 µg/m³, 1.6× usualBang Kapi, 17 February: 30.6 µg/m³, 1.0× usualBang Kapi, 18 February: 22.7 µg/m³, 0.7× usualBang Kapi, 19 February: 23.9 µg/m³, 0.7× usualBang Kapi, 20 February: 19.2 µg/m³, 0.6× usualBang Kapi, 21 February: 20.0 µg/m³, 0.6× usualBang Kapi, 22 February: 18.6 µg/m³, 0.6× usualBang Kapi, 23 February: 19.5 µg/m³, 0.6× usualNong ChokNong Chok, 10 February: no readingNong Chok, 11 February: 36.9 µg/m³, 1.2× usualNong Chok, 12 February: 51.4 µg/m³, 1.6× usualNong Chok, 13 February: 65.7 µg/m³, 2.1× usualNong Chok, 14 February: no readingNong Chok, 15 February: no readingNong Chok, 16 February: no readingNong Chok, 17 February: no readingNong Chok, 18 February: no readingNong Chok, 19 February: no readingNong Chok, 20 February: 19.1 µg/m³, 0.6× usualNong Chok, 21 February: 18.3 µg/m³, 0.6× usualNong Chok, 22 February: 19.0 µg/m³, 0.6× usualNong Chok, 23 February: 18.5 µg/m³, 0.6× usualNakhon PathomNakhon Pathom, 10 February: 21.4 µg/m³, 0.7× usualNakhon Pathom, 11 February: 35.2 µg/m³, 1.1× usualNakhon Pathom, 12 February: 46.8 µg/m³, 1.5× usualNakhon Pathom, 13 February: 63.7 µg/m³, 2.0× usualNakhon Pathom, 14 February: 76.1 µg/m³, 2.4× usualNakhon Pathom, 15 February: 71.2 µg/m³, 2.3× usualNakhon Pathom, 16 February: 42.6 µg/m³, 1.4× usualNakhon Pathom, 17 February: 26.5 µg/m³, 0.8× usualNakhon Pathom, 18 February: 18.1 µg/m³, 0.6× usualNakhon Pathom, 19 February: 20.6 µg/m³, 0.7× usualNakhon Pathom, 20 February: 15.2 µg/m³, 0.5× usualNakhon Pathom, 21 February: 13.7 µg/m³, 0.4× usualNakhon Pathom, 22 February: 13.3 µg/m³, 0.4× usualNakhon Pathom, 23 February: 13.0 µg/m³, 0.4× usualSamut PrakanSamut Prakan, 10 February: 23.3 µg/m³, 1.0× usualSamut Prakan, 11 February: 33.4 µg/m³, 1.4× usualSamut Prakan, 12 February: 47.0 µg/m³, 1.9× usualSamut Prakan, 13 February: 63.5 µg/m³, 2.6× usualSamut Prakan, 14 February: 72.8 µg/m³, 3.0× usualSamut Prakan, 15 February: 57.4 µg/m³, 2.4× usualSamut Prakan, 16 February: 29.7 µg/m³, 1.2× usualSamut Prakan, 17 February: 22.7 µg/m³, 0.9× usualSamut Prakan, 18 February: 17.7 µg/m³, 0.7× usualSamut Prakan, 19 February: 16.4 µg/m³, 0.7× usualSamut Prakan, 20 February: 13.5 µg/m³, 0.6× usualSamut Prakan, 21 February: 14.1 µg/m³, 0.6× usualSamut Prakan, 22 February: 13.7 µg/m³, 0.6× usualSamut Prakan, 23 February: 11.4 µg/m³, 0.5× usualHua HinHua Hin, 10 February: 24.4 µg/m³, 1.0× usualHua Hin, 11 February: no readingHua Hin, 12 February: no readingHua Hin, 13 February: 53.0 µg/m³, 2.2× usualHua Hin, 14 February: 57.5 µg/m³, 2.3× usualHua Hin, 15 February: 64.6 µg/m³, 2.6× usualHua Hin, 16 February: 29.8 µg/m³, 1.2× usualHua Hin, 17 February: 20.8 µg/m³, 0.8× usualHua Hin, 18 February: 16.0 µg/m³, 0.7× usualHua Hin, 19 February: 14.7 µg/m³, 0.6× usualHua Hin, 20 February: 15.6 µg/m³, 0.6× usualHua Hin, 21 February: 19.3 µg/m³, 0.8× usualHua Hin, 22 February: 16.9 µg/m³, 0.7× usualHua Hin, 23 February: 17.5 µg/m³, 0.7× usualRanongRanong, 10 February: 22.6 µg/m³, 1.3× usualRanong, 11 February: no readingRanong, 12 February: no readingRanong, 13 February: 36.4 µg/m³, 2.1× usualRanong, 14 February: 35.2 µg/m³, 2.0× usualRanong, 15 February: 20.8 µg/m³, 1.2× usualRanong, 16 February: 16.1 µg/m³, 0.9× usualRanong, 17 February: no readingRanong, 18 February: no readingRanong, 19 February: 14.8 µg/m³, 0.8× usualRanong, 20 February: 12.9 µg/m³, 0.7× usualRanong, 21 February: 11.9 µg/m³, 0.7× usualRanong, 22 February: 10.3 µg/m³, 0.6× usualRanong, 23 February: 13.9 µg/m³, 0.8× usualLat KrabangLat Krabang, 10 February: 33.0 µg/m³, 0.9× usualLat Krabang, 11 February: 41.7 µg/m³, 1.2× usualLat Krabang, 12 February: 51.4 µg/m³, 1.4× usualLat Krabang, 13 February: 71.4 µg/m³, 2.0× usualLat Krabang, 14 February: 85.7 µg/m³, 2.4× usualLat Krabang, 15 February: 68.3 µg/m³, 1.9× usualLat Krabang, 16 February: 46.3 µg/m³, 1.3× usualLat Krabang, 17 February: 34.2 µg/m³, 1.0× usualLat Krabang, 18 February: 25.1 µg/m³, 0.7× usualLat Krabang, 19 February: 24.1 µg/m³, 0.7× usualLat Krabang, 20 February: 19.4 µg/m³, 0.5× usualLat Krabang, 21 February: 18.2 µg/m³, 0.5× usualLat Krabang, 22 February: 19.0 µg/m³, 0.5× usualLat Krabang, 23 February: 19.1 µg/m³, 0.5× usualRatchaburiRatchaburi, 10 February: 31.0 µg/m³, 0.8× usualRatchaburi, 11 February: no readingRatchaburi, 12 February: no readingRatchaburi, 13 February: 71.1 µg/m³, 1.8× usualRatchaburi, 14 February: 84.6 µg/m³, 2.1× usualRatchaburi, 15 February: 91.5 µg/m³, 2.3× usualRatchaburi, 16 February: 63.4 µg/m³, 1.6× usualRatchaburi, 17 February: 40.4 µg/m³, 1.0× usualRatchaburi, 18 February: 30.0 µg/m³, 0.7× usualRatchaburi, 19 February: 29.0 µg/m³, 0.7× usualRatchaburi, 20 February: 23.2 µg/m³, 0.6× usualRatchaburi, 21 February: 21.7 µg/m³, 0.5× usualRatchaburi, 22 February: 21.4 µg/m³, 0.5× usualRatchaburi, 23 February: 21.9 µg/m³, 0.5× usualNong KhaemNong Khaem, 10 February: 28.8 µg/m³, 0.8× usualNong Khaem, 11 February: 44.8 µg/m³, 1.3× usualNong Khaem, 12 February: 52.9 µg/m³, 1.5× usualNong Khaem, 13 February: 69.3 µg/m³, 2.0× usualNong Khaem, 14 February: 81.4 µg/m³, 2.3× usualNong Khaem, 15 February: 74.2 µg/m³, 2.1× usualNong Khaem, 16 February: 45.9 µg/m³, 1.3× usualNong Khaem, 17 February: 32.2 µg/m³, 0.9× usualNong Khaem, 18 February: 22.3 µg/m³, 0.6× usualNong Khaem, 19 February: 22.5 µg/m³, 0.6× usualNong Khaem, 20 February: 18.0 µg/m³, 0.5× usualNong Khaem, 21 February: 18.3 µg/m³, 0.5× usualNong Khaem, 22 February: 16.4 µg/m³, 0.5× usualNong Khaem, 23 February: 17.5 µg/m³, 0.5× usualBueng KumBueng Kum, 10 February: 33.4 µg/m³, 1.0× usualBueng Kum, 11 February: no readingBueng Kum, 12 February: no readingBueng Kum, 13 February: no readingBueng Kum, 14 February: 78.3 µg/m³, 2.3× usualBueng Kum, 15 February: 73.0 µg/m³, 2.2× usualBueng Kum, 16 February: 45.7 µg/m³, 1.4× usualBueng Kum, 17 February: 32.8 µg/m³, 1.0× usualBueng Kum, 18 February: 22.8 µg/m³, 0.7× usualBueng Kum, 19 February: 22.9 µg/m³, 0.7× usualBueng Kum, 20 February: 16.8 µg/m³, 0.5× usualBueng Kum, 21 February: 15.7 µg/m³, 0.5× usualBueng Kum, 22 February: 14.3 µg/m³, 0.4× usualBueng Kum, 23 February: 16.0 µg/m³, 0.5× usualKhan Na YaoKhan Na Yao, 10 February: 31.2 µg/m³, 0.9× usualKhan Na Yao, 11 February: 38.3 µg/m³, 1.1× usualKhan Na Yao, 12 February: 54.3 µg/m³, 1.5× usualKhan Na Yao, 13 February: 70.3 µg/m³, 2.0× usualKhan Na Yao, 14 February: 78.3 µg/m³, 2.2× usualKhan Na Yao, 15 February: 71.9 µg/m³, 2.0× usualKhan Na Yao, 16 February: 47.0 µg/m³, 1.3× usualKhan Na Yao, 17 February: 34.4 µg/m³, 1.0× usualKhan Na Yao, 18 February: 22.6 µg/m³, 0.6× usualKhan Na Yao, 19 February: 22.3 µg/m³, 0.6× usualKhan Na Yao, 20 February: 18.8 µg/m³, 0.5× usualKhan Na Yao, 21 February: 18.2 µg/m³, 0.5× usualKhan Na Yao, 22 February: 18.2 µg/m³, 0.5× usualKhan Na Yao, 23 February: 19.3 µg/m³, 0.5× usualBang NaBang Na, 10 February: 38.4 µg/m³, 1.1× usualBang Na, 11 February: 40.1 µg/m³, 1.1× usualBang Na, 12 February: 45.6 µg/m³, 1.3× usualBang Na, 13 February: 61.4 µg/m³, 1.7× usualBang Na, 14 February: 75.6 µg/m³, 2.1× usualBang Na, 15 February: 72.0 µg/m³, 2.0× usualBang Na, 16 February: 44.2 µg/m³, 1.2× usualBang Na, 17 February: 34.7 µg/m³, 1.0× usualBang Na, 18 February: 28.9 µg/m³, 0.8× usualBang Na, 19 February: 25.2 µg/m³, 0.7× usualBang Na, 20 February: 20.6 µg/m³, 0.6× usualBang Na, 21 February: 22.3 µg/m³, 0.6× usualBang Na, 22 February: 22.3 µg/m³, 0.6× usualBang Na, 23 February: 24.1 µg/m³, 0.7× usualKhlong LuangKhlong Luang, 10 February: 30.5 µg/m³, 0.9× usualKhlong Luang, 11 February: 40.9 µg/m³, 1.2× usualKhlong Luang, 12 February: 49.8 µg/m³, 1.4× usualKhlong Luang, 13 February: 61.5 µg/m³, 1.8× usualKhlong Luang, 14 February: 73.4 µg/m³, 2.1× usualKhlong Luang, 15 February: 77.8 µg/m³, 2.2× usualKhlong Luang, 16 February: 53.0 µg/m³, 1.5× usualKhlong Luang, 17 February: 34.9 µg/m³, 1.0× usualKhlong Luang, 18 February: 24.8 µg/m³, 0.7× usualKhlong Luang, 19 February: 24.3 µg/m³, 0.7× usualKhlong Luang, 20 February: 21.0 µg/m³, 0.6× usualKhlong Luang, 21 February: 20.3 µg/m³, 0.6× usualKhlong Luang, 22 February: 19.5 µg/m³, 0.6× usualKhlong Luang, 23 February: 20.8 µg/m³, 0.6× usualMueang NonthaburiMueang Nonthaburi, 10 February: 24.2 µg/m³, 0.7× usualMueang Nonthaburi, 11 February: 38.6 µg/m³, 1.2× usualMueang Nonthaburi, 12 February: 50.3 µg/m³, 1.5× usualMueang Nonthaburi, 13 February: 63.6 µg/m³, 1.9× usualMueang Nonthaburi, 14 February: 72.1 µg/m³, 2.2× usualMueang Nonthaburi, 15 February: 67.1 µg/m³, 2.0× usualMueang Nonthaburi, 16 February: 42.2 µg/m³, 1.3× usualMueang Nonthaburi, 17 February: 27.8 µg/m³, 0.8× usualMueang Nonthaburi, 18 February: 18.7 µg/m³, 0.6× usualMueang Nonthaburi, 19 February: 16.8 µg/m³, 0.5× usualMueang Nonthaburi, 20 February: 12.0 µg/m³, 0.4× usualMueang Nonthaburi, 21 February: 12.7 µg/m³, 0.4× usualMueang Nonthaburi, 22 February: 12.5 µg/m³, 0.4× usualMueang Nonthaburi, 23 February: 13.4 µg/m³, 0.4× usualSaphan SungSaphan Sung, 10 February: no readingSaphan Sung, 11 February: 40.7 µg/m³, 1.2× usualSaphan Sung, 12 February: 47.9 µg/m³, 1.5× usualSaphan Sung, 13 February: 60.2 µg/m³, 1.8× usualSaphan Sung, 14 February: 71.3 µg/m³, 2.2× usualSaphan Sung, 15 February: no readingSaphan Sung, 16 February: 43.0 µg/m³, 1.3× usualSaphan Sung, 17 February: 31.7 µg/m³, 1.0× usualSaphan Sung, 18 February: 24.3 µg/m³, 0.7× usualSaphan Sung, 19 February: 24.1 µg/m³, 0.7× usualSaphan Sung, 20 February: 18.2 µg/m³, 0.6× usualSaphan Sung, 21 February: 19.5 µg/m³, 0.6× usualSaphan Sung, 22 February: 18.4 µg/m³, 0.6× usualSaphan Sung, 23 February: 18.7 µg/m³, 0.6× usualBangkokBangkok, 10 February: 31.3 µg/m³, 1.0× usualBangkok, 11 February: 38.5 µg/m³, 1.2× usualBangkok, 12 February: 47.3 µg/m³, 1.5× usualBangkok, 13 February: 57.9 µg/m³, 1.8× usualBangkok, 14 February: 71.0 µg/m³, 2.3× usualBangkok, 15 February: 63.7 µg/m³, 2.0× usualBangkok, 16 February: 39.5 µg/m³, 1.3× usualBangkok, 17 February: 29.2 µg/m³, 0.9× usualBangkok, 18 February: 22.5 µg/m³, 0.7× usualBangkok, 19 February: 20.5 µg/m³, 0.7× usualBangkok, 20 February: 16.9 µg/m³, 0.5× usualBangkok, 21 February: 17.6 µg/m³, 0.6× usualBangkok, 22 February: 16.9 µg/m³, 0.5× usualBangkok, 23 February: 17.2 µg/m³, 0.5× usualAranyaprathetAranyaprathet, 10 February: 37.6 µg/m³, 1.1× usualAranyaprathet, 11 February: no readingAranyaprathet, 12 February: no readingAranyaprathet, 13 February: 45.7 µg/m³, 1.3× usualAranyaprathet, 14 February: 70.9 µg/m³, 2.0× usualAranyaprathet, 15 February: 83.5 µg/m³, 2.4× usualAranyaprathet, 16 February: 61.7 µg/m³, 1.8× usualAranyaprathet, 17 February: 48.3 µg/m³, 1.4× usualAranyaprathet, 18 February: 28.5 µg/m³, 0.8× usualAranyaprathet, 19 February: 26.7 µg/m³, 0.8× usualAranyaprathet, 20 February: 19.9 µg/m³, 0.6× usualAranyaprathet, 21 February: 19.5 µg/m³, 0.6× usualAranyaprathet, 22 February: 20.0 µg/m³, 0.6× usualAranyaprathet, 23 February: 23.8 µg/m³, 0.7× usualPhra PradaengPhra Pradaeng, 10 February: 26.8 µg/m³, 0.9× usualPhra Pradaeng, 11 February: 35.7 µg/m³, 1.2× usualPhra Pradaeng, 12 February: 48.2 µg/m³, 1.6× usualPhra Pradaeng, 13 February: 58.6 µg/m³, 2.0× usualPhra Pradaeng, 14 February: 69.3 µg/m³, 2.4× usualPhra Pradaeng, 15 February: 59.5 µg/m³, 2.0× usualPhra Pradaeng, 16 February: 33.5 µg/m³, 1.1× usualPhra Pradaeng, 17 February: 26.5 µg/m³, 0.9× usualPhra Pradaeng, 18 February: 21.9 µg/m³, 0.7× usualPhra Pradaeng, 19 February: 18.6 µg/m³, 0.6× usualPhra Pradaeng, 20 February: 17.1 µg/m³, 0.6× usualPhra Pradaeng, 21 February: 17.6 µg/m³, 0.6× usualPhra Pradaeng, 22 February: 16.7 µg/m³, 0.6× usualPhra Pradaeng, 23 February: 15.6 µg/m³, 0.5× usualPhra Nakhon Si Ayut…Phra Nakhon Si Ayutthaya, 10 February: no readingPhra Nakhon Si Ayutthaya, 11 February: no readingPhra Nakhon Si Ayutthaya, 12 February: no readingPhra Nakhon Si Ayutthaya, 13 February: 54.2 µg/m³, 1.8× usualPhra Nakhon Si Ayutthaya, 14 February: 69.1 µg/m³, 2.2× usualPhra Nakhon Si Ayutthaya, 15 February: 68.8 µg/m³, 2.2× usualPhra Nakhon Si Ayutthaya, 16 February: 55.6 µg/m³, 1.8× usualPhra Nakhon Si Ayutthaya, 17 February: 36.2 µg/m³, 1.2× usualPhra Nakhon Si Ayutthaya, 18 February: 23.5 µg/m³, 0.8× usualPhra Nakhon Si Ayutthaya, 19 February: 24.0 µg/m³, 0.8× usualPhra Nakhon Si Ayutthaya, 20 February: 17.1 µg/m³, 0.6× usualPhra Nakhon Si Ayutthaya, 21 February: 16.9 µg/m³, 0.5× usualPhra Nakhon Si Ayutthaya, 22 February: 19.3 µg/m³, 0.6× usualPhra Nakhon Si Ayutthaya, 23 February: 20.7 µg/m³, 0.7× usualSai MaiSai Mai, 10 February: 28.9 µg/m³, 0.9× usualSai Mai, 11 February: 37.9 µg/m³, 1.2× usualSai Mai, 12 February: 42.8 µg/m³, 1.3× usualSai Mai, 13 February: 57.3 µg/m³, 1.8× usualSai Mai, 14 February: 67.2 µg/m³, 2.1× usualSai Mai, 15 February: 61.9 µg/m³, 1.9× usualSai Mai, 16 February: 43.6 µg/m³, 1.4× usualSai Mai, 17 February: 34.1 µg/m³, 1.1× usualSai Mai, 18 February: 23.6 µg/m³, 0.7× usualSai Mai, 19 February: 23.4 µg/m³, 0.7× usualSai Mai, 20 February: 16.3 µg/m³, 0.5× usualSai Mai, 21 February: 16.5 µg/m³, 0.5× usualSai Mai, 22 February: 16.3 µg/m³, 0.5× usualSai Mai, 23 February: 18.2 µg/m³, 0.6× usualBan Khlong PrawetBan Khlong Prawet, 10 February: 35.0 µg/m³, 1.2× usualBan Khlong Prawet, 11 February: 33.7 µg/m³, 1.2× usualBan Khlong Prawet, 12 February: 43.2 µg/m³, 1.5× usualBan Khlong Prawet, 13 February: 56.7 µg/m³, 2.0× usualBan Khlong Prawet, 14 February: 66.3 µg/m³, 2.3× usualBan Khlong Prawet, 15 February: 58.2 µg/m³, 2.0× usualBan Khlong Prawet, 16 February: 33.0 µg/m³, 1.1× usualBan Khlong Prawet, 17 February: 26.2 µg/m³, 0.9× usualBan Khlong Prawet, 18 February: 19.9 µg/m³, 0.7× usualBan Khlong Prawet, 19 February: 17.9 µg/m³, 0.6× usualBan Khlong Prawet, 20 February: 13.5 µg/m³, 0.5× usualBan Khlong Prawet, 21 February: 14.2 µg/m³, 0.5× usualBan Khlong Prawet, 22 February: 14.2 µg/m³, 0.5× usualBan Khlong Prawet, 23 February: 14.5 µg/m³, 0.5× usualSaraburiSaraburi, 10 February: 29.7 µg/m³, 1.0× usualSaraburi, 11 February: no readingSaraburi, 12 February: no readingSaraburi, 13 February: 48.2 µg/m³, 1.6× usualSaraburi, 14 February: 64.9 µg/m³, 2.1× usualSaraburi, 15 February: 77.3 µg/m³, 2.5× usualSaraburi, 16 February: 68.5 µg/m³, 2.3× usualSaraburi, 17 February: 44.1 µg/m³, 1.5× usualSaraburi, 18 February: 25.6 µg/m³, 0.8× usualSaraburi, 19 February: 24.3 µg/m³, 0.8× usualSaraburi, 20 February: 18.8 µg/m³, 0.6× usualSaraburi, 21 February: 19.3 µg/m³, 0.6× usualSaraburi, 22 February: 19.1 µg/m³, 0.6× usualSaraburi, 23 February: 21.5 µg/m³, 0.7× usualSuphan BuriSuphan Buri, 10 February: 25.4 µg/m³, 0.9× usualSuphan Buri, 11 February: no readingSuphan Buri, 12 February: no readingSuphan Buri, 13 February: 46.3 µg/m³, 1.6× usualSuphan Buri, 14 February: 60.6 µg/m³, 2.0× usualSuphan Buri, 15 February: 66.8 µg/m³, 2.2× usualSuphan Buri, 16 February: 62.8 µg/m³, 2.1× usualSuphan Buri, 17 February: 38.6 µg/m³, 1.3× usualSuphan Buri, 18 February: 24.6 µg/m³, 0.8× usualSuphan Buri, 19 February: 21.9 µg/m³, 0.7× usualSuphan Buri, 20 February: 20.0 µg/m³, 0.7× usualSuphan Buri, 21 February: 17.1 µg/m³, 0.6× usualSuphan Buri, 22 February: 17.1 µg/m³, 0.6× usualSuphan Buri, 23 February: 17.6 µg/m³, 0.6× usualLaem ChabangLaem Chabang, 10 February: 24.7 µg/m³, 1.0× usualLaem Chabang, 11 February: no readingLaem Chabang, 12 February: no readingLaem Chabang, 13 February: 40.6 µg/m³, 1.6× usualLaem Chabang, 14 February: 57.1 µg/m³, 2.3× usualLaem Chabang, 15 February: 51.6 µg/m³, 2.1× usualLaem Chabang, 16 February: 25.9 µg/m³, 1.0× usualLaem Chabang, 17 February: no readingLaem Chabang, 18 February: no readingLaem Chabang, 19 February: no readingLaem Chabang, 20 February: 13.0 µg/m³, 0.5× usualLaem Chabang, 21 February: 14.9 µg/m³, 0.6× usualLaem Chabang, 22 February: 13.4 µg/m³, 0.5× usualLaem Chabang, 23 February: 12.7 µg/m³, 0.5× usualBan ChangBan Chang, 10 February: 24.7 µg/m³, 0.9× usualBan Chang, 11 February: no readingBan Chang, 12 February: no readingBan Chang, 13 February: 51.3 µg/m³, 1.9× usualBan Chang, 14 February: 55.0 µg/m³, 2.0× usualBan Chang, 15 February: 50.7 µg/m³, 1.9× usualBan Chang, 16 February: 28.6 µg/m³, 1.1× usualBan Chang, 17 February: 18.3 µg/m³, 0.7× usualBan Chang, 18 February: 18.0 µg/m³, 0.7× usualBan Chang, 19 February: 19.9 µg/m³, 0.7× usualBan Chang, 20 February: 16.3 µg/m³, 0.6× usualBan Chang, 21 February: 16.5 µg/m³, 0.6× usualBan Chang, 22 February: 17.0 µg/m³, 0.6× usualBan Chang, 23 February: 14.1 µg/m³, 0.5× usualRayongRayong, 10 February: 21.2 µg/m³, 0.9× usualRayong, 11 February: no readingRayong, 12 February: no readingRayong, 13 February: 47.3 µg/m³, 1.9× usualRayong, 14 February: 53.9 µg/m³, 2.2× usualRayong, 15 February: 47.0 µg/m³, 1.9× usualRayong, 16 February: 26.0 µg/m³, 1.0× usualRayong, 17 February: 15.4 µg/m³, 0.6× usualRayong, 18 February: 14.7 µg/m³, 0.6× usualRayong, 19 February: 17.2 µg/m³, 0.7× usualRayong, 20 February: 12.5 µg/m³, 0.5× usualRayong, 21 February: 15.4 µg/m³, 0.6× usualRayong, 22 February: 12.9 µg/m³, 0.5× usualRayong, 23 February: 10.6 µg/m³, 0.4× usualChanthaburiChanthaburi, 10 February: 28.4 µg/m³, 1.2× usualChanthaburi, 11 February: no readingChanthaburi, 12 February: no readingChanthaburi, 13 February: 42.9 µg/m³, 1.9× usualChanthaburi, 14 February: 47.1 µg/m³, 2.1× usualChanthaburi, 15 February: 51.4 µg/m³, 2.3× usualChanthaburi, 16 February: 27.2 µg/m³, 1.2× usualChanthaburi, 17 February: 13.7 µg/m³, 0.6× usualChanthaburi, 18 February: 12.5 µg/m³, 0.5× usualChanthaburi, 19 February: 16.9 µg/m³, 0.7× usualChanthaburi, 20 February: 17.2 µg/m³, 0.8× usualChanthaburi, 21 February: 17.8 µg/m³, 0.8× usualChanthaburi, 22 February: 15.6 µg/m³, 0.7× usualChanthaburi, 23 February: 12.5 µg/m³, 0.5× usualKanchanaburiKanchanaburi, 10 February: 41.7 µg/m³, 1.2× usualKanchanaburi, 11 February: no readingKanchanaburi, 12 February: no readingKanchanaburi, 13 February: 61.6 µg/m³, 1.8× usualKanchanaburi, 14 February: no readingKanchanaburi, 15 February: 109.0 µg/m³, 3.2× usualKanchanaburi, 16 February: no readingKanchanaburi, 17 February: 60.1 µg/m³, 1.8× usualKanchanaburi, 18 February: 32.7 µg/m³, 1.0× usualKanchanaburi, 19 February: 28.0 µg/m³, 0.8× usualKanchanaburi, 20 February: 22.3 µg/m³, 0.7× usualKanchanaburi, 21 February: 21.5 µg/m³, 0.6× usualKanchanaburi, 22 February: 21.6 µg/m³, 0.6× usualKanchanaburi, 23 February: 25.4 µg/m³, 0.7× usualSi Maha PhotSi Maha Phot, 10 February: 36.5 µg/m³, 1.0× usualSi Maha Phot, 11 February: no readingSi Maha Phot, 12 February: no readingSi Maha Phot, 13 February: no readingSi Maha Phot, 14 February: 64.0 µg/m³, 1.7× usualSi Maha Phot, 15 February: 83.2 µg/m³, 2.2× usualSi Maha Phot, 16 February: no readingSi Maha Phot, 17 February: no readingSi Maha Phot, 18 February: 36.8 µg/m³, 1.0× usualSi Maha Phot, 19 February: 37.6 µg/m³, 1.0× usualSi Maha Phot, 20 February: 31.9 µg/m³, 0.9× usualSi Maha Phot, 21 February: 26.6 µg/m³, 0.7× usualSi Maha Phot, 22 February: 28.6 µg/m³, 0.8× usualSi Maha Phot, 23 February: 29.9 µg/m³, 0.8× usualLop BuriLop Buri, 10 February: 36.9 µg/m³, 1.1× usualLop Buri, 11 February: no readingLop Buri, 12 February: no readingLop Buri, 13 February: 43.4 µg/m³, 1.3× usualLop Buri, 14 February: 64.6 µg/m³, 1.9× usualLop Buri, 15 February: 77.6 µg/m³, 2.3× usualLop Buri, 16 February: 82.4 µg/m³, 2.5× usualLop Buri, 17 February: 53.6 µg/m³, 1.6× usualLop Buri, 18 February: 36.0 µg/m³, 1.1× usualLop Buri, 19 February: 32.0 µg/m³, 1.0× usualLop Buri, 20 February: 28.4 µg/m³, 0.9× usualLop Buri, 21 February: 28.0 µg/m³, 0.8× usualLop Buri, 22 February: 29.4 µg/m³, 0.9× usualLop Buri, 23 February: 30.7 µg/m³, 0.9× usualPhetchaburiPhetchaburi, 10 February: 22.9 µg/m³, 0.7× usualPhetchaburi, 11 February: no readingPhetchaburi, 12 February: no readingPhetchaburi, 13 February: 62.0 µg/m³, 1.9× usualPhetchaburi, 14 February: no readingPhetchaburi, 15 February: 73.8 µg/m³, 2.2× usualPhetchaburi, 16 February: 39.5 µg/m³, 1.2× usualPhetchaburi, 17 February: 25.8 µg/m³, 0.8× usualPhetchaburi, 18 February: no readingPhetchaburi, 19 February: 21.5 µg/m³, 0.6× usualPhetchaburi, 20 February: 14.8 µg/m³, 0.4× usualPhetchaburi, 21 February: 14.1 µg/m³, 0.4× usualPhetchaburi, 22 February: 12.5 µg/m³, 0.4× usualPhetchaburi, 23 February: 13.1 µg/m³, 0.4× usualBuri RamBuri Ram, 10 February: 24.6 µg/m³, 1.0× usualBuri Ram, 11 February: no readingBuri Ram, 12 February: no readingBuri Ram, 13 February: 34.1 µg/m³, 1.3× usualBuri Ram, 14 February: no readingBuri Ram, 15 February: 65.0 µg/m³, 2.5× usualBuri Ram, 16 February: 50.0 µg/m³, 2.0× usualBuri Ram, 17 February: 44.3 µg/m³, 1.7× usualBuri Ram, 18 February: 47.0 µg/m³, 1.8× usualBuri Ram, 19 February: 36.6 µg/m³, 1.4× usualBuri Ram, 20 February: 30.1 µg/m³, 1.2× usualBuri Ram, 21 February: 23.7 µg/m³, 0.9× usualBuri Ram, 22 February: 23.5 µg/m³, 0.9× usualBuri Ram, 23 February: 29.0 µg/m³, 1.1× usualUdon ThaniUdon Thani, 10 February: 18.6 µg/m³, 0.7× usualUdon Thani, 11 February: no readingUdon Thani, 12 February: no readingUdon Thani, 13 February: 38.6 µg/m³, 1.5× usualUdon Thani, 14 February: 41.8 µg/m³, 1.6× usualUdon Thani, 15 February: 54.8 µg/m³, 2.1× usualUdon Thani, 16 February: no readingUdon Thani, 17 February: 37.8 µg/m³, 1.5× usualUdon Thani, 18 February: 49.0 µg/m³, 1.9× usualUdon Thani, 19 February: 54.1 µg/m³, 2.1× usualUdon Thani, 20 February: 38.6 µg/m³, 1.5× usualUdon Thani, 21 February: 35.7 µg/m³, 1.4× usualUdon Thani, 22 February: 37.8 µg/m³, 1.5× usualUdon Thani, 23 February: 38.0 µg/m³, 1.5× usualNakhon NayokNakhon Nayok, 10 February: 25.7 µg/m³, 1.0× usualNakhon Nayok, 11 February: no readingNakhon Nayok, 12 February: no readingNakhon Nayok, 13 February: 33.0 µg/m³, 1.3× usualNakhon Nayok, 14 February: 37.4 µg/m³, 1.5× usualNakhon Nayok, 15 February: 49.2 µg/m³, 2.0× usualNakhon Nayok, 16 February: 48.7 µg/m³, 2.0× usualNakhon Nayok, 17 February: 38.3 µg/m³, 1.6× usualNakhon Nayok, 18 February: 25.6 µg/m³, 1.0× usualNakhon Nayok, 19 February: 24.0 µg/m³, 1.0× usualNakhon Nayok, 20 February: 18.2 µg/m³, 0.7× usualNakhon Nayok, 21 February: 16.5 µg/m³, 0.7× usualNakhon Nayok, 22 February: 23.6 µg/m³, 1.0× usualNakhon Nayok, 23 February: 22.6 µg/m³, 0.9× usualChai NatChai Nat, 10 February: 38.8 µg/m³, 1.1× usualChai Nat, 11 February: no readingChai Nat, 12 February: no readingChai Nat, 13 February: 41.9 µg/m³, 1.2× usualChai Nat, 14 February: no readingChai Nat, 15 February: 55.6 µg/m³, 1.5× usualChai Nat, 16 February: 73.4 µg/m³, 2.0× usualChai Nat, 17 February: 58.7 µg/m³, 1.6× usualChai Nat, 18 February: 40.5 µg/m³, 1.1× usualChai Nat, 19 February: 31.0 µg/m³, 0.9× usualChai Nat, 20 February: 27.2 µg/m³, 0.8× usualChai Nat, 21 February: 24.6 µg/m³, 0.7× usualChai Nat, 22 February: 23.8 µg/m³, 0.7× usualChai Nat, 23 February: 28.7 µg/m³, 0.8× usualPhetchabunPhetchabun, 10 February: 53.9 µg/m³, 1.6× usualPhetchabun, 11 February: no readingPhetchabun, 12 February: no readingPhetchabun, 13 February: 48.1 µg/m³, 1.4× usualPhetchabun, 14 February: no readingPhetchabun, 15 February: 59.4 µg/m³, 1.7× usualPhetchabun, 16 February: 69.9 µg/m³, 2.0× usualPhetchabun, 17 February: 70.5 µg/m³, 2.0× usualPhetchabun, 18 February: 50.5 µg/m³, 1.5× usualPhetchabun, 19 February: 35.6 µg/m³, 1.0× usualPhetchabun, 20 February: 32.4 µg/m³, 0.9× usualPhetchabun, 21 February: 32.6 µg/m³, 0.9× usualPhetchabun, 22 February: 31.5 µg/m³, 0.9× usualPhetchabun, 23 February: 35.7 µg/m³, 1.0× usualNong Bua LamphuNong Bua Lamphu, 10 February: 35.1 µg/m³, 1.4× usualNong Bua Lamphu, 11 February: no readingNong Bua Lamphu, 12 February: no readingNong Bua Lamphu, 13 February: 44.3 µg/m³, 1.7× usualNong Bua Lamphu, 14 February: no readingNong Bua Lamphu, 15 February: 50.8 µg/m³, 2.0× usualNong Bua Lamphu, 16 February: 57.1 µg/m³, 2.2× usualNong Bua Lamphu, 17 February: 45.6 µg/m³, 1.8× usualNong Bua Lamphu, 18 February: 58.5 µg/m³, 2.3× usualNong Bua Lamphu, 19 February: 46.7 µg/m³, 1.8× usualNong Bua Lamphu, 20 February: 40.9 µg/m³, 1.6× usualNong Bua Lamphu, 21 February: 35.4 µg/m³, 1.4× usualNong Bua Lamphu, 22 February: 31.6 µg/m³, 1.2× usualNong Bua Lamphu, 23 February: 36.1 µg/m³, 1.4× usualKamphaeng PhetKamphaeng Phet, 10 February: no readingKamphaeng Phet, 11 February: no readingKamphaeng Phet, 12 February: no readingKamphaeng Phet, 13 February: 54.1 µg/m³, 1.5× usualKamphaeng Phet, 14 February: no readingKamphaeng Phet, 15 February: no readingKamphaeng Phet, 16 February: no readingKamphaeng Phet, 17 February: 76.7 µg/m³, 2.2× usualKamphaeng Phet, 18 February: no readingKamphaeng Phet, 19 February: 48.2 µg/m³, 1.4× usualKamphaeng Phet, 20 February: no readingKamphaeng Phet, 21 February: no readingKamphaeng Phet, 22 February: 45.6 µg/m³, 1.3× usualKamphaeng Phet, 23 February: 51.6 µg/m³, 1.5× usualLoeiLoei, 10 February: 35.9 µg/m³, 1.1× usualLoei, 11 February: no readingLoei, 12 February: no readingLoei, 13 February: 53.6 µg/m³, 1.7× usualLoei, 14 February: 54.7 µg/m³, 1.7× usualLoei, 15 February: 59.5 µg/m³, 1.8× usualLoei, 16 February: 59.6 µg/m³, 1.8× usualLoei, 17 February: 62.9 µg/m³, 1.9× usualLoei, 18 February: 76.4 µg/m³, 2.4× usualLoei, 19 February: 56.0 µg/m³, 1.7× usualLoei, 20 February: 41.3 µg/m³, 1.3× usualLoei, 21 February: no readingLoei, 22 February: 29.4 µg/m³, 0.9× usualLoei, 23 February: 35.7 µg/m³, 1.1× usualMukdahanMukdahan, 10 February: 24.2 µg/m³, 0.9× usualMukdahan, 11 February: no readingMukdahan, 12 February: no readingMukdahan, 13 February: 36.9 µg/m³, 1.3× usualMukdahan, 14 February: 39.2 µg/m³, 1.4× usualMukdahan, 15 February: 48.0 µg/m³, 1.7× usualMukdahan, 16 February: 39.9 µg/m³, 1.4× usualMukdahan, 17 February: 38.7 µg/m³, 1.4× usualMukdahan, 18 February: 63.4 µg/m³, 2.3× usualMukdahan, 19 February: 72.3 µg/m³, 2.6× usualMukdahan, 20 February: 62.1 µg/m³, 2.2× usualMukdahan, 21 February: 54.6 µg/m³, 2.0× usualMukdahan, 22 February: 54.5 µg/m³, 2.0× usualMukdahan, 23 February: 60.6 µg/m³, 2.2× usualYasothonYasothon, 10 February: 21.8 µg/m³, 0.8× usualYasothon, 11 February: no readingYasothon, 12 February: no readingYasothon, 13 February: 33.4 µg/m³, 1.2× usualYasothon, 14 February: 44.8 µg/m³, 1.6× usualYasothon, 15 February: 49.6 µg/m³, 1.8× usualYasothon, 16 February: 37.8 µg/m³, 1.3× usualYasothon, 17 February: 35.1 µg/m³, 1.2× usualYasothon, 18 February: 59.7 µg/m³, 2.1× usualYasothon, 19 February: 67.0 µg/m³, 2.4× usualYasothon, 20 February: 58.1 µg/m³, 2.1× usualYasothon, 21 February: 48.8 µg/m³, 1.7× usualYasothon, 22 February: 49.3 µg/m³, 1.7× usualYasothon, 23 February: 55.0 µg/m³, 2.0× usualRoi EtRoi Et, 10 February: no readingRoi Et, 11 February: no readingRoi Et, 12 February: no readingRoi Et, 13 February: no readingRoi Et, 14 February: no readingRoi Et, 15 February: no readingRoi Et, 16 February: no readingRoi Et, 17 February: 31.5 µg/m³, 1.3× usualRoi Et, 18 February: 53.0 µg/m³, 2.1× usualRoi Et, 19 February: 47.0 µg/m³, 1.9× usualRoi Et, 20 February: 42.4 µg/m³, 1.7× usualRoi Et, 21 February: 35.8 µg/m³, 1.4× usualRoi Et, 22 February: 35.7 µg/m³, 1.4× usualRoi Et, 23 February: 44.9 µg/m³, 1.8× usualSi Sa KetSi Sa Ket, 10 February: no readingSi Sa Ket, 11 February: no readingSi Sa Ket, 12 February: no readingSi Sa Ket, 13 February: 29.2 µg/m³, 1.3× usualSi Sa Ket, 14 February: 40.4 µg/m³, 1.8× usualSi Sa Ket, 15 February: 46.4 µg/m³, 2.1× usualSi Sa Ket, 16 February: no readingSi Sa Ket, 17 February: no readingSi Sa Ket, 18 February: 46.7 µg/m³, 2.1× usualSi Sa Ket, 19 February: no readingSi Sa Ket, 20 February: 43.9 µg/m³, 1.9× usualSi Sa Ket, 21 February: 39.1 µg/m³, 1.7× usualSi Sa Ket, 22 February: 38.6 µg/m³, 1.7× usualSi Sa Ket, 23 February: 49.2 µg/m³, 2.2× usualSakon NakhonSakon Nakhon, 10 February: 9.8 µg/m³, 0.6× usualSakon Nakhon, 11 February: no readingSakon Nakhon, 12 February: no readingSakon Nakhon, 13 February: 19.3 µg/m³, 1.1× usualSakon Nakhon, 14 February: 22.6 µg/m³, 1.3× usualSakon Nakhon, 15 February: 30.2 µg/m³, 1.7× usualSakon Nakhon, 16 February: 26.3 µg/m³, 1.5× usualSakon Nakhon, 17 February: 20.5 µg/m³, 1.2× usualSakon Nakhon, 18 February: 37.1 µg/m³, 2.1× usualSakon Nakhon, 19 February: 31.2 µg/m³, 1.8× usualSakon Nakhon, 20 February: no readingSakon Nakhon, 21 February: no readingSakon Nakhon, 22 February: 44.5 µg/m³, 2.5× usualSakon Nakhon, 23 February: 50.0 µg/m³, 2.8× usualUbon RatchathaniUbon Ratchathani, 10 February: 25.3 µg/m³, 0.8× usualUbon Ratchathani, 11 February: no readingUbon Ratchathani, 12 February: no readingUbon Ratchathani, 13 February: 39.7 µg/m³, 1.3× usualUbon Ratchathani, 14 February: 44.4 µg/m³, 1.5× usualUbon Ratchathani, 15 February: 44.4 µg/m³, 1.5× usualUbon Ratchathani, 16 February: no readingUbon Ratchathani, 17 February: no readingUbon Ratchathani, 18 February: 49.7 µg/m³, 1.6× usualUbon Ratchathani, 19 February: 68.6 µg/m³, 2.2× usualUbon Ratchathani, 20 February: 64.0 µg/m³, 2.1× usualUbon Ratchathani, 21 February: 63.1 µg/m³, 2.1× usualUbon Ratchathani, 22 February: 58.0 µg/m³, 1.9× usualUbon Ratchathani, 23 February: 56.0 µg/m³, 1.8× usualAmnat CharoenAmnat Charoen, 10 February: 13.8 µg/m³, 0.6× usualAmnat Charoen, 11 February: no readingAmnat Charoen, 12 February: no readingAmnat Charoen, 13 February: 25.1 µg/m³, 1.0× usualAmnat Charoen, 14 February: 31.7 µg/m³, 1.3× usualAmnat Charoen, 15 February: 35.8 µg/m³, 1.4× usualAmnat Charoen, 16 February: 25.4 µg/m³, 1.0× usualAmnat Charoen, 17 February: 26.1 µg/m³, 1.0× usualAmnat Charoen, 18 February: 45.9 µg/m³, 1.8× usualAmnat Charoen, 19 February: 61.1 µg/m³, 2.5× usualAmnat Charoen, 20 February: 55.6 µg/m³, 2.2× usualAmnat Charoen, 21 February: 48.6 µg/m³, 2.0× usualAmnat Charoen, 22 February: 48.4 µg/m³, 1.9× usualAmnat Charoen, 23 February: 52.8 µg/m³, 2.1× usual10 Feb121416182022
Every counted city, in the order the episode reached them, 3 days before to 3 after. Each square is a day, coloured by that day's PM2.5; outlined: at twice the city's usual or more.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

Every city it reached

CityDaysHighestUsualAbove usual
SukhothaiSukhothai, Thailand5 106.017 February31.13.4×
KanchanaburiKanchanaburi, Thailand1 109.015 February34.33.2×
Samut SakhonSamut Sakhon, Thailand3 95.014 February31.13.1×
Samut PrakanSamut Prakan, Thailand3 72.814 February24.33.0×
Sakon NakhonSakon Nakhon, Thailand1 50.023 February17.62.8×
Hua HinPrachuap Khiri Khan, Thailand3 64.615 February24.62.6×
MukdahanMukdahan, Thailand3 72.319 February27.82.6×
Buri RamBuriram, Thailand1 65.015 February25.52.5×
SaraburiSaraburi, Thailand3 77.315 February30.42.5×
Lop BuriLopburi, Thailand2 82.416 February33.32.5×
Amnat CharoenAmnat Charoen, Thailand2 61.119 February24.92.5×
Nakhon PathomNakhon Pathom, Thailand3 76.114 February31.32.4×
Ban Samae DamBangkok, Thailand3 79.214 February32.72.4×
AranyaprathetSa Kaeo, Thailand2 83.515 February34.62.4×
Bang KapiBangkok, Thailand3 77.014 February32.02.4×
Lat KrabangBangkok, Thailand1 85.714 February35.82.4×
YasothonYasothon, Thailand3 67.019 February28.22.4×
LoeiLoei, Thailand1 76.418 February32.42.4×
Phra PradaengSamut Prakan, Thailand2 69.314 February29.42.4×
Bueng KumBangkok, Thailand2 78.314 February33.52.3×
Nong KhaemBangkok, Thailand2 81.414 February34.92.3×
Ban Khlong PrawetBangkok, Thailand2 66.314 February28.72.3×
Laem ChabangChon Buri, Thailand2 57.114 February24.92.3×
Nong Bua LamphuNong Bua Lamphu, Thailand2 58.518 February25.72.3×
BangkokBangkok, Thailand2 71.014 February31.42.3×
ChanthaburiChanthaburi, Thailand2 51.415 February22.82.3×
RatchaburiRatchaburi, Thailand2 91.515 February40.62.3×
Ubon RatchathaniUbon Ratchathani, Thailand2 68.619 February30.52.2×
Si Maha PhotPrachin Buri, Thailand1 83.215 February37.02.2×
Suphan BuriSuphan Buri, Thailand3 66.815 February29.82.2×
Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand2 69.114 February30.92.2×
Khlong LuangPathum Thani, Thailand2 77.815 February34.82.2×
LampangLampang, Thailand3 98.017 February43.92.2×
PhetchaburiPhetchaburi, Thailand1 73.815 February33.52.2×
Si Sa KetSi Sa Ket, Thailand1 49.223 February22.62.2×
Khan Na YaoBangkok, Thailand2 78.314 February36.02.2×
Saphan SungBangkok, Thailand1 71.314 February32.82.2×
Mueang NonthaburiNonthaburi, Thailand2 72.114 February33.22.2×
Kamphaeng PhetKamphaeng Phet, Thailand1 76.717 February35.42.2×
RayongRayong, Thailand1 53.914 February24.92.2×
Roi EtRoi Et, Thailand1 53.018 February24.72.1×
Udon ThaniUdon Thani, Thailand3 54.815 February25.72.1×
Sai MaiBangkok, Thailand1 67.214 February32.02.1×
Nong ChokBangkok, Thailand1 65.713 February31.32.1×
Bang NaBangkok, Thailand1 75.614 February36.32.1×
RanongRanong province, Thailand1 36.413 February17.72.1×
Ban ChangRayong, Thailand1 55.014 February26.92.0×
PhetchabunPhetchabun, Thailand2 70.517 February34.62.0×
Chai NatChai Nat, Thailand1 73.416 February36.12.0×
Nakhon NayokNakhon Nayok, Thailand1 49.215 February24.52.0×
Lak SiBangkok, Thailand2 70.413 February35.12.0×

Daily means in µg/m³. Usual: the city's median for this time of year (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that.

Against other episodes in Thailand

Number 2 of 24 episodes in Thailand since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 24.

Use this page

SmogRank, Western Thailand, February 2024: 51 cities with PM2.5 at twice their usual or more, 13 to 20 February 2024, smogrank.com/episodes/2024-02-western-thailand (accessed 3 October 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

An episode is a run of days when many cities close to each other (four or more within 350 km on a day, 8 or more in all) each had a daily PM2.5 mean of at least 25 µg/m³ and at least 2 times their usual for that time of year. Found in our own measurements, not picked by hand. How we find episodes. Values are each city's daily mean of its own monitors; causes are the usual kinds for a pattern like this, not a confirmed source.