SmogRank / Episodes / Thailand

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 MaiNakhon NayokBan ChangLak SiPhetchabunChai NatRanongSakon NakhonSi Sa KetRoi EtUdon ThaniNong ChokSai MaiBang NaRayongSuphan BuriUbon RatchathaniPhra Nakhon Si AyutthayaBangkokSaphan SungMueang NonthaburiPhetchaburiKamphaeng PhetKhlong LuangKhan Na YaoSi Maha PhotLampangChanthaburiLaem ChabangNong Bua LamphuBan Khlong PrawetBueng KumNong KhaemRatchaburiYasothonPhra PradaengNakhon PathomLoeiBang KapiBan Samae DamAranyaprathetLat KrabangAmnat CharoenBuri RamSaraburiLop BuriHua HinMukdahanSamut 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

Samut SakhonSamut Sakhon, 10 February: 22.9 µg/m³Samut Sakhon, 11 February: 35.9 µg/m³Samut Sakhon, 12 February: 59.8 µg/m³Samut Sakhon, 13 February: 80.8 µg/m³, 2.5× its usual 31.7Samut Sakhon, 14 February: 95.0 µg/m³, 3.1× its usual 31.1Samut Sakhon, 15 February: 75.0 µg/m³, 2.5× its usual 30.4Samut Sakhon, 16 February: 36.2 µg/m³Samut Sakhon, 17 February: 22.4 µg/m³Samut Sakhon, 18 February: 18.2 µg/m³Samut Sakhon, 19 February: 18.5 µg/m³Samut Sakhon, 20 February: 13.5 µg/m³Samut Sakhon, 21 February: 14.9 µg/m³Samut Sakhon, 22 February: 12.4 µg/m³Samut Sakhon, 23 February: 13.4 µg/m³Lak SiLak Si, 10 February: 30.3 µg/m³Lak Si, 11 February: 41.8 µg/m³Lak Si, 12 February: 50.3 µg/m³Lak Si, 13 February: 70.4 µg/m³, 2.0× its usual 35.1Lak Si, 14 February: no readingLak Si, 15 February: 67.2 µg/m³, 2.0× its usual 33.0Lak 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/m³Ban Samae Dam, 11 February: 46.7 µg/m³Ban Samae Dam, 12 February: 57.8 µg/m³Ban Samae Dam, 13 February: 70.1 µg/m³, 2.1× its usual 32.7Ban Samae Dam, 14 February: 79.2 µg/m³, 2.4× its usual 32.7Ban Samae Dam, 15 February: 73.8 µg/m³, 2.3× its usual 32.5Ban Samae Dam, 16 February: 42.3 µg/m³Ban Samae Dam, 17 February: 33.9 µg/m³Ban Samae Dam, 18 February: 31.1 µg/m³Ban Samae Dam, 19 February: 29.1 µg/m³Ban Samae Dam, 20 February: 19.3 µg/m³Ban Samae Dam, 21 February: 20.4 µg/m³Ban Samae Dam, 22 February: 19.6 µg/m³Ban Samae Dam, 23 February: 19.8 µg/m³Bang KapiBang Kapi, 10 February: 30.5 µg/m³Bang Kapi, 11 February: 43.7 µg/m³Bang Kapi, 12 February: 53.1 µg/m³Bang Kapi, 13 February: 69.1 µg/m³, 2.1× its usual 33.0Bang Kapi, 14 February: 77.0 µg/m³, 2.4× its usual 32.0Bang Kapi, 15 February: 74.6 µg/m³, 2.4× its usual 31.3Bang Kapi, 16 February: 50.7 µg/m³Bang Kapi, 17 February: 30.6 µg/m³Bang Kapi, 18 February: 22.7 µg/m³Bang Kapi, 19 February: 23.9 µg/m³Bang Kapi, 20 February: 19.2 µg/m³Bang Kapi, 21 February: 20.0 µg/m³Bang Kapi, 22 February: 18.6 µg/m³Bang Kapi, 23 February: 19.5 µg/m³Nong ChokNong Chok, 10 February: no readingNong Chok, 11 February: 36.9 µg/m³Nong Chok, 12 February: 51.4 µg/m³Nong Chok, 13 February: 65.7 µg/m³, 2.1× its usual 31.3Nong 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/m³Nong Chok, 21 February: 18.3 µg/m³Nong Chok, 22 February: 19.0 µg/m³Nong Chok, 23 February: 18.5 µg/m³Nakhon PathomNakhon Pathom, 10 February: 21.4 µg/m³Nakhon Pathom, 11 February: 35.2 µg/m³Nakhon Pathom, 12 February: 46.8 µg/m³Nakhon Pathom, 13 February: 63.7 µg/m³, 2.0× its usual 31.5Nakhon Pathom, 14 February: 76.1 µg/m³, 2.4× its usual 31.3Nakhon Pathom, 15 February: 71.2 µg/m³, 2.3× its usual 30.8Nakhon Pathom, 16 February: 42.6 µg/m³Nakhon Pathom, 17 February: 26.5 µg/m³Nakhon Pathom, 18 February: 18.1 µg/m³Nakhon Pathom, 19 February: 20.6 µg/m³Nakhon Pathom, 20 February: 15.2 µg/m³Nakhon Pathom, 21 February: 13.7 µg/m³Nakhon Pathom, 22 February: 13.3 µg/m³Nakhon Pathom, 23 February: 13.0 µg/m³Samut PrakanSamut Prakan, 10 February: 23.3 µg/m³Samut Prakan, 11 February: 33.4 µg/m³Samut Prakan, 12 February: 47.0 µg/m³Samut Prakan, 13 February: 63.5 µg/m³, 2.5× its usual 25.0Samut Prakan, 14 February: 72.8 µg/m³, 3.0× its usual 24.3Samut Prakan, 15 February: 57.4 µg/m³, 2.4× its usual 23.8Samut Prakan, 16 February: 29.7 µg/m³Samut Prakan, 17 February: 22.7 µg/m³Samut Prakan, 18 February: 17.7 µg/m³Samut Prakan, 19 February: 16.4 µg/m³Samut Prakan, 20 February: 13.5 µg/m³Samut Prakan, 21 February: 14.1 µg/m³Samut Prakan, 22 February: 13.7 µg/m³Samut Prakan, 23 February: 11.4 µg/m³Hua HinHua Hin, 10 February: 24.4 µg/m³Hua Hin, 11 February: no readingHua Hin, 12 February: no readingHua Hin, 13 February: 53.0 µg/m³, 2.2× its usual 24.6Hua Hin, 14 February: 57.5 µg/m³, 2.3× its usual 24.6Hua Hin, 15 February: 64.6 µg/m³, 2.6× its usual 24.6Hua Hin, 16 February: 29.8 µg/m³Hua Hin, 17 February: 20.8 µg/m³Hua Hin, 18 February: 16.0 µg/m³Hua Hin, 19 February: 14.7 µg/m³Hua Hin, 20 February: 15.6 µg/m³Hua Hin, 21 February: 19.3 µg/m³Hua Hin, 22 February: 16.9 µg/m³Hua Hin, 23 February: 17.5 µg/m³RanongRanong, 10 February: 22.6 µg/m³Ranong, 11 February: no readingRanong, 12 February: no readingRanong, 13 February: 36.4 µg/m³, 2.1× its usual 17.7Ranong, 14 February: 35.2 µg/m³Ranong, 15 February: 20.8 µg/m³Ranong, 16 February: 16.1 µg/m³Ranong, 17 February: no readingRanong, 18 February: no readingRanong, 19 February: 14.8 µg/m³Ranong, 20 February: 12.9 µg/m³Ranong, 21 February: 11.9 µg/m³Ranong, 22 February: 10.3 µg/m³Ranong, 23 February: 13.9 µg/m³Lat KrabangLat Krabang, 10 February: 33.0 µg/m³Lat Krabang, 11 February: 41.7 µg/m³Lat Krabang, 12 February: 51.4 µg/m³Lat Krabang, 13 February: 71.4 µg/m³Lat Krabang, 14 February: 85.7 µg/m³, 2.4× its usual 35.8Lat Krabang, 15 February: 68.3 µg/m³Lat Krabang, 16 February: 46.3 µg/m³Lat Krabang, 17 February: 34.2 µg/m³Lat Krabang, 18 February: 25.1 µg/m³Lat Krabang, 19 February: 24.1 µg/m³Lat Krabang, 20 February: 19.4 µg/m³Lat Krabang, 21 February: 18.2 µg/m³Lat Krabang, 22 February: 19.0 µg/m³Lat Krabang, 23 February: 19.1 µg/m³RatchaburiRatchaburi, 10 February: 31.0 µg/m³Ratchaburi, 11 February: no readingRatchaburi, 12 February: no readingRatchaburi, 13 February: 71.1 µg/m³Ratchaburi, 14 February: 84.6 µg/m³, 2.0× its usual 41.3Ratchaburi, 15 February: 91.5 µg/m³, 2.3× its usual 40.6Ratchaburi, 16 February: 63.4 µg/m³Ratchaburi, 17 February: 40.4 µg/m³Ratchaburi, 18 February: 30.0 µg/m³Ratchaburi, 19 February: 29.0 µg/m³Ratchaburi, 20 February: 23.2 µg/m³Ratchaburi, 21 February: 21.7 µg/m³Ratchaburi, 22 February: 21.4 µg/m³Ratchaburi, 23 February: 21.9 µg/m³Nong KhaemNong Khaem, 10 February: 28.8 µg/m³Nong Khaem, 11 February: 44.8 µg/m³Nong Khaem, 12 February: 52.9 µg/m³Nong Khaem, 13 February: 69.3 µg/m³Nong Khaem, 14 February: 81.4 µg/m³, 2.3× its usual 34.9Nong Khaem, 15 February: 74.2 µg/m³, 2.2× its usual 34.0Nong Khaem, 16 February: 45.9 µg/m³Nong Khaem, 17 February: 32.2 µg/m³Nong Khaem, 18 February: 22.3 µg/m³Nong Khaem, 19 February: 22.5 µg/m³Nong Khaem, 20 February: 18.0 µg/m³Nong Khaem, 21 February: 18.3 µg/m³Nong Khaem, 22 February: 16.4 µg/m³Nong Khaem, 23 February: 17.5 µg/m³Bueng KumBueng Kum, 10 February: 33.4 µg/m³Bueng Kum, 11 February: no readingBueng Kum, 12 February: no readingBueng Kum, 13 February: no readingBueng Kum, 14 February: 78.3 µg/m³, 2.3× its usual 33.5Bueng Kum, 15 February: 73.0 µg/m³, 2.3× its usual 31.8Bueng Kum, 16 February: 45.7 µg/m³Bueng Kum, 17 February: 32.8 µg/m³Bueng Kum, 18 February: 22.8 µg/m³Bueng Kum, 19 February: 22.9 µg/m³Bueng Kum, 20 February: 16.8 µg/m³Bueng Kum, 21 February: 15.7 µg/m³Bueng Kum, 22 February: 14.3 µg/m³Bueng Kum, 23 February: 16.0 µg/m³Khan Na YaoKhan Na Yao, 10 February: 31.2 µg/m³Khan Na Yao, 11 February: 38.3 µg/m³Khan Na Yao, 12 February: 54.3 µg/m³Khan Na Yao, 13 February: 70.3 µg/m³Khan Na Yao, 14 February: 78.3 µg/m³, 2.2× its usual 36.0Khan Na Yao, 15 February: 71.9 µg/m³, 2.1× its usual 34.3Khan Na Yao, 16 February: 47.0 µg/m³Khan Na Yao, 17 February: 34.4 µg/m³Khan Na Yao, 18 February: 22.6 µg/m³Khan Na Yao, 19 February: 22.3 µg/m³Khan Na Yao, 20 February: 18.8 µg/m³Khan Na Yao, 21 February: 18.2 µg/m³Khan Na Yao, 22 February: 18.2 µg/m³Khan Na Yao, 23 February: 19.3 µg/m³Bang NaBang Na, 10 February: 38.4 µg/m³Bang Na, 11 February: 40.1 µg/m³Bang Na, 12 February: 45.6 µg/m³Bang Na, 13 February: 61.4 µg/m³Bang Na, 14 February: 75.6 µg/m³, 2.1× its usual 36.3Bang Na, 15 February: 72.0 µg/m³Bang Na, 16 February: 44.2 µg/m³Bang Na, 17 February: 34.7 µg/m³Bang Na, 18 February: 28.9 µg/m³Bang Na, 19 February: 25.2 µg/m³Bang Na, 20 February: 20.6 µg/m³Bang Na, 21 February: 22.3 µg/m³Bang Na, 22 February: 22.3 µg/m³Bang Na, 23 February: 24.1 µg/m³Khlong LuangKhlong Luang, 10 February: 30.5 µg/m³Khlong Luang, 11 February: 40.9 µg/m³Khlong Luang, 12 February: 49.8 µg/m³Khlong Luang, 13 February: 61.5 µg/m³Khlong Luang, 14 February: 73.4 µg/m³, 2.1× its usual 34.9Khlong Luang, 15 February: 77.8 µg/m³, 2.2× its usual 34.8Khlong Luang, 16 February: 53.0 µg/m³Khlong Luang, 17 February: 34.9 µg/m³Khlong Luang, 18 February: 24.8 µg/m³Khlong Luang, 19 February: 24.3 µg/m³Khlong Luang, 20 February: 21.0 µg/m³Khlong Luang, 21 February: 20.3 µg/m³Khlong Luang, 22 February: 19.5 µg/m³Khlong Luang, 23 February: 20.8 µg/m³Mueang NonthaburiMueang Nonthaburi, 10 February: 24.2 µg/m³Mueang Nonthaburi, 11 February: 38.6 µg/m³Mueang Nonthaburi, 12 February: 50.3 µg/m³Mueang Nonthaburi, 13 February: 63.6 µg/m³Mueang Nonthaburi, 14 February: 72.1 µg/m³, 2.2× its usual 33.2Mueang Nonthaburi, 15 February: 67.1 µg/m³, 2.1× its usual 32.2Mueang Nonthaburi, 16 February: 42.2 µg/m³Mueang Nonthaburi, 17 February: 27.8 µg/m³Mueang Nonthaburi, 18 February: 18.7 µg/m³Mueang Nonthaburi, 19 February: 16.8 µg/m³Mueang Nonthaburi, 20 February: 12.0 µg/m³Mueang Nonthaburi, 21 February: 12.7 µg/m³Mueang Nonthaburi, 22 February: 12.5 µg/m³Mueang Nonthaburi, 23 February: 13.4 µg/m³Saphan SungSaphan Sung, 10 February: no readingSaphan Sung, 11 February: 40.7 µg/m³Saphan Sung, 12 February: 47.9 µg/m³Saphan Sung, 13 February: 60.2 µg/m³Saphan Sung, 14 February: 71.3 µg/m³, 2.2× its usual 32.8Saphan Sung, 15 February: no readingSaphan Sung, 16 February: 43.0 µg/m³Saphan Sung, 17 February: 31.7 µg/m³Saphan Sung, 18 February: 24.3 µg/m³Saphan Sung, 19 February: 24.1 µg/m³Saphan Sung, 20 February: 18.2 µg/m³Saphan Sung, 21 February: 19.5 µg/m³Saphan Sung, 22 February: 18.4 µg/m³Saphan Sung, 23 February: 18.7 µg/m³AranyaprathetAranyaprathet, 10 February: 37.6 µg/m³Aranyaprathet, 11 February: no readingAranyaprathet, 12 February: no readingAranyaprathet, 13 February: 45.7 µg/m³Aranyaprathet, 14 February: 70.9 µg/m³, 2.0× its usual 34.8Aranyaprathet, 15 February: 83.5 µg/m³, 2.4× its usual 34.6Aranyaprathet, 16 February: 61.7 µg/m³Aranyaprathet, 17 February: 48.3 µg/m³Aranyaprathet, 18 February: 28.5 µg/m³Aranyaprathet, 19 February: 26.7 µg/m³Aranyaprathet, 20 February: 19.9 µg/m³Aranyaprathet, 21 February: 19.5 µg/m³Aranyaprathet, 22 February: 20.0 µg/m³Aranyaprathet, 23 February: 23.8 µg/m³BangkokBangkok, 10 February: 31.2 µg/m³Bangkok, 11 February: 38.5 µg/m³Bangkok, 12 February: 47.3 µg/m³Bangkok, 13 February: 57.9 µg/m³Bangkok, 14 February: 70.5 µg/m³, 2.2× its usual 31.4Bangkok, 15 February: 63.7 µg/m³, 2.1× its usual 30.3Bangkok, 16 February: 39.5 µg/m³Bangkok, 17 February: 29.2 µg/m³Bangkok, 18 February: 22.5 µg/m³Bangkok, 19 February: 20.5 µg/m³Bangkok, 20 February: 17.1 µg/m³Bangkok, 21 February: 17.5 µg/m³Bangkok, 22 February: 16.8 µg/m³Bangkok, 23 February: 17.2 µg/m³Phra PradaengPhra Pradaeng, 10 February: 26.8 µg/m³Phra Pradaeng, 11 February: 35.7 µg/m³Phra Pradaeng, 12 February: 48.2 µg/m³Phra Pradaeng, 13 February: 58.6 µg/m³Phra Pradaeng, 14 February: 69.3 µg/m³, 2.4× its usual 29.4Phra Pradaeng, 15 February: 59.5 µg/m³, 2.1× its usual 28.1Phra Pradaeng, 16 February: 33.5 µg/m³Phra Pradaeng, 17 February: 26.5 µg/m³Phra Pradaeng, 18 February: 21.9 µg/m³Phra Pradaeng, 19 February: 18.6 µg/m³Phra Pradaeng, 20 February: 17.1 µg/m³Phra Pradaeng, 21 February: 17.6 µg/m³Phra Pradaeng, 22 February: 16.7 µg/m³Phra Pradaeng, 23 February: 15.6 µg/m³Phra 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/m³Phra Nakhon Si Ayutthaya, 14 February: 69.1 µg/m³, 2.2× its usual 30.9Phra Nakhon Si Ayutthaya, 15 February: 68.8 µg/m³, 2.3× its usual 30.5Phra Nakhon Si Ayutthaya, 16 February: 55.6 µg/m³Phra Nakhon Si Ayutthaya, 17 February: 36.2 µg/m³Phra Nakhon Si Ayutthaya, 18 February: 23.5 µg/m³Phra Nakhon Si Ayutthaya, 19 February: 24.0 µg/m³Phra Nakhon Si Ayutthaya, 20 February: 17.1 µg/m³Phra Nakhon Si Ayutthaya, 21 February: 16.9 µg/m³Phra Nakhon Si Ayutthaya, 22 February: 19.3 µg/m³Phra Nakhon Si Ayutthaya, 23 February: 20.7 µg/m³Sai MaiSai Mai, 10 February: 28.9 µg/m³Sai Mai, 11 February: 37.9 µg/m³Sai Mai, 12 February: 42.8 µg/m³Sai Mai, 13 February: 57.3 µg/m³Sai Mai, 14 February: 67.2 µg/m³, 2.1× its usual 32.0Sai Mai, 15 February: 61.9 µg/m³Sai Mai, 16 February: 43.6 µg/m³Sai Mai, 17 February: 34.1 µg/m³Sai Mai, 18 February: 23.6 µg/m³Sai Mai, 19 February: 23.4 µg/m³Sai Mai, 20 February: 16.3 µg/m³Sai Mai, 21 February: 16.5 µg/m³Sai Mai, 22 February: 16.3 µg/m³Sai Mai, 23 February: 18.2 µg/m³Ban Khlong PrawetBan Khlong Prawet, 10 February: 35.0 µg/m³Ban Khlong Prawet, 11 February: 33.7 µg/m³Ban Khlong Prawet, 12 February: 43.2 µg/m³Ban Khlong Prawet, 13 February: 56.7 µg/m³Ban Khlong Prawet, 14 February: 66.3 µg/m³, 2.3× its usual 28.7Ban Khlong Prawet, 15 February: 58.2 µg/m³, 2.1× its usual 27.8Ban Khlong Prawet, 16 February: 33.0 µg/m³Ban Khlong Prawet, 17 February: 26.2 µg/m³Ban Khlong Prawet, 18 February: 19.9 µg/m³Ban Khlong Prawet, 19 February: 17.9 µg/m³Ban Khlong Prawet, 20 February: 13.5 µg/m³Ban Khlong Prawet, 21 February: 14.2 µg/m³Ban Khlong Prawet, 22 February: 14.2 µg/m³Ban Khlong Prawet, 23 February: 14.5 µg/m³SaraburiSaraburi, 10 February: 29.7 µg/m³Saraburi, 11 February: no readingSaraburi, 12 February: no readingSaraburi, 13 February: 48.2 µg/m³Saraburi, 14 February: 64.9 µg/m³, 2.1× its usual 31.0Saraburi, 15 February: 77.3 µg/m³, 2.5× its usual 30.4Saraburi, 16 February: 68.5 µg/m³, 2.3× its usual 30.4Saraburi, 17 February: 44.1 µg/m³Saraburi, 18 February: 25.6 µg/m³Saraburi, 19 February: 24.3 µg/m³Saraburi, 20 February: 18.8 µg/m³Saraburi, 21 February: 19.3 µg/m³Saraburi, 22 February: 19.1 µg/m³Saraburi, 23 February: 21.5 µg/m³Suphan BuriSuphan Buri, 10 February: 25.4 µg/m³Suphan Buri, 11 February: no readingSuphan Buri, 12 February: no readingSuphan Buri, 13 February: 46.3 µg/m³Suphan Buri, 14 February: 60.6 µg/m³, 2.0× its usual 29.9Suphan Buri, 15 February: 66.8 µg/m³, 2.2× its usual 29.8Suphan Buri, 16 February: 62.8 µg/m³, 2.1× its usual 30.0Suphan Buri, 17 February: 38.6 µg/m³Suphan Buri, 18 February: 24.6 µg/m³Suphan Buri, 19 February: 21.9 µg/m³Suphan Buri, 20 February: 20.0 µg/m³Suphan Buri, 21 February: 17.1 µg/m³Suphan Buri, 22 February: 17.1 µg/m³Suphan Buri, 23 February: 17.6 µg/m³Laem ChabangLaem Chabang, 10 February: 24.7 µg/m³Laem Chabang, 11 February: no readingLaem Chabang, 12 February: no readingLaem Chabang, 13 February: 40.6 µg/m³Laem Chabang, 14 February: 57.1 µg/m³, 2.3× its usual 24.9Laem Chabang, 15 February: 51.6 µg/m³, 2.2× its usual 24.0Laem Chabang, 16 February: 25.9 µg/m³Laem Chabang, 17 February: no readingLaem Chabang, 18 February: no readingLaem Chabang, 19 February: no readingLaem Chabang, 20 February: 13.0 µg/m³Laem Chabang, 21 February: 14.9 µg/m³Laem Chabang, 22 February: 13.4 µg/m³Laem Chabang, 23 February: 12.7 µg/m³Ban ChangBan Chang, 10 February: 24.7 µg/m³Ban Chang, 11 February: no readingBan Chang, 12 February: no readingBan Chang, 13 February: 51.3 µg/m³Ban Chang, 14 February: 55.0 µg/m³, 2.0× its usual 26.9Ban Chang, 15 February: 50.7 µg/m³Ban Chang, 16 February: 28.6 µg/m³Ban Chang, 17 February: 18.3 µg/m³Ban Chang, 18 February: 18.0 µg/m³Ban Chang, 19 February: 19.9 µg/m³Ban Chang, 20 February: 16.3 µg/m³Ban Chang, 21 February: 16.5 µg/m³Ban Chang, 22 February: 17.0 µg/m³Ban Chang, 23 February: 14.1 µg/m³RayongRayong, 10 February: 21.2 µg/m³Rayong, 11 February: no readingRayong, 12 February: no readingRayong, 13 February: 47.3 µg/m³Rayong, 14 February: 53.9 µg/m³, 2.2× its usual 24.9Rayong, 15 February: 47.0 µg/m³Rayong, 16 February: 26.0 µg/m³Rayong, 17 February: 15.4 µg/m³Rayong, 18 February: 14.7 µg/m³Rayong, 19 February: 17.2 µg/m³Rayong, 20 February: 12.5 µg/m³Rayong, 21 February: 15.4 µg/m³Rayong, 22 February: 12.9 µg/m³Rayong, 23 February: 10.6 µg/m³ChanthaburiChanthaburi, 10 February: 28.4 µg/m³Chanthaburi, 11 February: no readingChanthaburi, 12 February: no readingChanthaburi, 13 February: 42.9 µg/m³Chanthaburi, 14 February: 47.1 µg/m³, 2.1× its usual 22.8Chanthaburi, 15 February: 51.4 µg/m³, 2.3× its usual 22.8Chanthaburi, 16 February: 27.2 µg/m³Chanthaburi, 17 February: 13.7 µg/m³Chanthaburi, 18 February: 12.5 µg/m³Chanthaburi, 19 February: 16.9 µg/m³Chanthaburi, 20 February: 17.2 µg/m³Chanthaburi, 21 February: 17.8 µg/m³Chanthaburi, 22 February: 15.6 µg/m³Chanthaburi, 23 February: 12.5 µg/m³KanchanaburiKanchanaburi, 10 February: 41.7 µg/m³Kanchanaburi, 11 February: no readingKanchanaburi, 12 February: no readingKanchanaburi, 13 February: 61.6 µg/m³Kanchanaburi, 14 February: no readingKanchanaburi, 15 February: 109.0 µg/m³, 3.2× its usual 34.3Kanchanaburi, 16 February: no readingKanchanaburi, 17 February: 60.1 µg/m³Kanchanaburi, 18 February: 32.7 µg/m³Kanchanaburi, 19 February: 28.0 µg/m³Kanchanaburi, 20 February: 22.3 µg/m³Kanchanaburi, 21 February: 21.5 µg/m³Kanchanaburi, 22 February: 21.6 µg/m³Kanchanaburi, 23 February: 25.4 µg/m³SukhothaiSukhothai, 10 February: 69.8 µg/m³Sukhothai, 11 February: no readingSukhothai, 12 February: no readingSukhothai, 13 February: 77.4 µg/m³Sukhothai, 14 February: no readingSukhothai, 15 February: 89.8 µg/m³, 2.7× its usual 33.2Sukhothai, 16 February: 88.5 µg/m³, 2.7× its usual 32.3Sukhothai, 17 February: 106.0 µg/m³, 3.4× its usual 31.1Sukhothai, 18 February: 68.2 µg/m³, 2.2× its usual 30.9Sukhothai, 19 February: 66.1 µg/m³, 2.3× its usual 29.2Sukhothai, 20 February: 53.7 µg/m³Sukhothai, 21 February: 52.8 µg/m³Sukhothai, 22 February: 51.1 µg/m³Sukhothai, 23 February: 51.1 µg/m³Si Maha PhotSi Maha Phot, 10 February: 36.5 µg/m³Si 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/m³Si Maha Phot, 15 February: 83.2 µg/m³, 2.2× its usual 37.0Si Maha Phot, 16 February: no readingSi Maha Phot, 17 February: no readingSi Maha Phot, 18 February: 36.8 µg/m³Si Maha Phot, 19 February: 37.6 µg/m³Si Maha Phot, 20 February: 31.9 µg/m³Si Maha Phot, 21 February: 26.6 µg/m³Si Maha Phot, 22 February: 28.6 µg/m³Si Maha Phot, 23 February: 29.9 µg/m³Lop BuriLop Buri, 10 February: 36.9 µg/m³Lop Buri, 11 February: no readingLop Buri, 12 February: no readingLop Buri, 13 February: 43.4 µg/m³Lop Buri, 14 February: 64.6 µg/m³Lop Buri, 15 February: 77.6 µg/m³, 2.4× its usual 33.0Lop Buri, 16 February: 82.4 µg/m³, 2.5× its usual 33.3Lop Buri, 17 February: 53.6 µg/m³Lop Buri, 18 February: 36.0 µg/m³Lop Buri, 19 February: 32.0 µg/m³Lop Buri, 20 February: 28.4 µg/m³Lop Buri, 21 February: 28.0 µg/m³Lop Buri, 22 February: 29.4 µg/m³Lop Buri, 23 February: 30.7 µg/m³PhetchaburiPhetchaburi, 10 February: 22.9 µg/m³Phetchaburi, 11 February: no readingPhetchaburi, 12 February: no readingPhetchaburi, 13 February: 62.0 µg/m³Phetchaburi, 14 February: no readingPhetchaburi, 15 February: 73.8 µg/m³, 2.2× its usual 33.5Phetchaburi, 16 February: 39.5 µg/m³Phetchaburi, 17 February: 25.8 µg/m³Phetchaburi, 18 February: no readingPhetchaburi, 19 February: 21.5 µg/m³Phetchaburi, 20 February: 14.8 µg/m³Phetchaburi, 21 February: 14.1 µg/m³Phetchaburi, 22 February: 12.5 µg/m³Phetchaburi, 23 February: 13.1 µg/m³Buri RamBuri Ram, 10 February: 24.6 µg/m³Buri Ram, 11 February: no readingBuri Ram, 12 February: no readingBuri Ram, 13 February: 34.1 µg/m³Buri Ram, 14 February: no readingBuri Ram, 15 February: 65.0 µg/m³, 2.5× its usual 25.5Buri Ram, 16 February: 50.0 µg/m³Buri Ram, 17 February: 44.3 µg/m³Buri Ram, 18 February: 47.0 µg/m³Buri Ram, 19 February: 36.6 µg/m³Buri Ram, 20 February: 30.1 µg/m³Buri Ram, 21 February: 23.7 µg/m³Buri Ram, 22 February: 23.5 µg/m³Buri Ram, 23 February: 29.0 µg/m³Udon ThaniUdon Thani, 10 February: 18.6 µg/m³Udon Thani, 11 February: no readingUdon Thani, 12 February: no readingUdon Thani, 13 February: 38.6 µg/m³Udon Thani, 14 February: 41.8 µg/m³Udon Thani, 15 February: 54.8 µg/m³, 2.1× its usual 25.7Udon Thani, 16 February: no readingUdon Thani, 17 February: 37.8 µg/m³Udon Thani, 18 February: 49.0 µg/m³, 2.1× its usual 23.5Udon Thani, 19 February: 54.1 µg/m³, 2.2× its usual 25.1Udon Thani, 20 February: 38.6 µg/m³Udon Thani, 21 February: 35.7 µg/m³Udon Thani, 22 February: 37.8 µg/m³Udon Thani, 23 February: 38.0 µg/m³Nakhon NayokNakhon Nayok, 10 February: 25.7 µg/m³Nakhon Nayok, 11 February: no readingNakhon Nayok, 12 February: no readingNakhon Nayok, 13 February: 33.0 µg/m³Nakhon Nayok, 14 February: 37.4 µg/m³Nakhon Nayok, 15 February: 49.2 µg/m³, 2.0× its usual 24.5Nakhon Nayok, 16 February: 48.7 µg/m³Nakhon Nayok, 17 February: 38.3 µg/m³Nakhon Nayok, 18 February: 25.6 µg/m³Nakhon Nayok, 19 February: 24.0 µg/m³Nakhon Nayok, 20 February: 18.2 µg/m³Nakhon Nayok, 21 February: 16.5 µg/m³Nakhon Nayok, 22 February: 23.6 µg/m³Nakhon Nayok, 23 February: 22.6 µg/m³Chai NatChai Nat, 10 February: 38.8 µg/m³Chai Nat, 11 February: no readingChai Nat, 12 February: no readingChai Nat, 13 February: 41.9 µg/m³Chai Nat, 14 February: no readingChai Nat, 15 February: 55.6 µg/m³Chai Nat, 16 February: 73.4 µg/m³, 2.0× its usual 36.1Chai Nat, 17 February: 58.7 µg/m³Chai Nat, 18 February: 40.5 µg/m³Chai Nat, 19 February: 31.0 µg/m³Chai Nat, 20 February: 27.2 µg/m³Chai Nat, 21 February: 24.6 µg/m³Chai Nat, 22 February: 23.8 µg/m³Chai Nat, 23 February: 28.7 µg/m³PhetchabunPhetchabun, 10 February: 53.9 µg/m³Phetchabun, 11 February: no readingPhetchabun, 12 February: no readingPhetchabun, 13 February: 48.1 µg/m³Phetchabun, 14 February: no readingPhetchabun, 15 February: 59.4 µg/m³Phetchabun, 16 February: 69.9 µg/m³, 2.0× its usual 34.7Phetchabun, 17 February: 70.5 µg/m³, 2.0× its usual 34.6Phetchabun, 18 February: 50.5 µg/m³Phetchabun, 19 February: 35.6 µg/m³Phetchabun, 20 February: 32.4 µg/m³Phetchabun, 21 February: 32.6 µg/m³Phetchabun, 22 February: 31.5 µg/m³Phetchabun, 23 February: 35.7 µg/m³Nong Bua LamphuNong Bua Lamphu, 10 February: 35.1 µg/m³Nong Bua Lamphu, 11 February: no readingNong Bua Lamphu, 12 February: no readingNong Bua Lamphu, 13 February: 44.3 µg/m³Nong Bua Lamphu, 14 February: no readingNong Bua Lamphu, 15 February: 50.8 µg/m³Nong Bua Lamphu, 16 February: 57.1 µg/m³, 2.2× its usual 26.4Nong Bua Lamphu, 17 February: 45.6 µg/m³Nong Bua Lamphu, 18 February: 58.5 µg/m³, 2.3× its usual 25.7Nong Bua Lamphu, 19 February: 46.7 µg/m³Nong Bua Lamphu, 20 February: 40.9 µg/m³Nong Bua Lamphu, 21 February: 35.4 µg/m³Nong Bua Lamphu, 22 February: 31.6 µg/m³Nong Bua Lamphu, 23 February: 36.1 µg/m³LampangLampang, 10 February: 89.0 µg/m³Lampang, 11 February: no readingLampang, 12 February: no readingLampang, 13 February: 59.5 µg/m³Lampang, 14 February: 58.3 µg/m³Lampang, 15 February: 69.7 µg/m³Lampang, 16 February: 85.4 µg/m³Lampang, 17 February: 98.0 µg/m³, 2.2× its usual 43.9Lampang, 18 February: 92.1 µg/m³, 2.2× its usual 41.5Lampang, 19 February: 80.5 µg/m³, 2.0× its usual 39.8Lampang, 20 February: 68.8 µg/m³Lampang, 21 February: 49.8 µg/m³Lampang, 22 February: 64.7 µg/m³Lampang, 23 February: 95.9 µg/m³Kamphaeng PhetKamphaeng Phet, 10 February: no readingKamphaeng Phet, 11 February: no readingKamphaeng Phet, 12 February: no readingKamphaeng Phet, 13 February: 54.1 µg/m³Kamphaeng Phet, 14 February: no readingKamphaeng Phet, 15 February: no readingKamphaeng Phet, 16 February: no readingKamphaeng Phet, 17 February: 76.7 µg/m³, 2.2× its usual 35.4Kamphaeng Phet, 18 February: no readingKamphaeng Phet, 19 February: 48.2 µg/m³Kamphaeng Phet, 20 February: no readingKamphaeng Phet, 21 February: no readingKamphaeng Phet, 22 February: 45.6 µg/m³Kamphaeng Phet, 23 February: 51.6 µg/m³LoeiLoei, 10 February: 35.9 µg/m³Loei, 11 February: no readingLoei, 12 February: no readingLoei, 13 February: 53.6 µg/m³Loei, 14 February: 54.7 µg/m³Loei, 15 February: 59.5 µg/m³Loei, 16 February: 59.6 µg/m³Loei, 17 February: 62.9 µg/m³Loei, 18 February: 76.4 µg/m³, 2.4× its usual 32.4Loei, 19 February: 56.0 µg/m³Loei, 20 February: 41.3 µg/m³Loei, 21 February: no readingLoei, 22 February: 29.4 µg/m³Loei, 23 February: 35.7 µg/m³MukdahanMukdahan, 10 February: 24.2 µg/m³Mukdahan, 11 February: no readingMukdahan, 12 February: no readingMukdahan, 13 February: 36.9 µg/m³Mukdahan, 14 February: 39.2 µg/m³Mukdahan, 15 February: 48.0 µg/m³Mukdahan, 16 February: 39.9 µg/m³Mukdahan, 17 February: 38.7 µg/m³Mukdahan, 18 February: 63.4 µg/m³, 2.3× its usual 27.8Mukdahan, 19 February: 72.3 µg/m³, 2.6× its usual 27.8Mukdahan, 20 February: 62.1 µg/m³, 2.2× its usual 27.9Mukdahan, 21 February: 54.6 µg/m³Mukdahan, 22 February: 54.5 µg/m³Mukdahan, 23 February: 60.6 µg/m³YasothonYasothon, 10 February: 21.8 µg/m³Yasothon, 11 February: no readingYasothon, 12 February: no readingYasothon, 13 February: 33.4 µg/m³Yasothon, 14 February: 44.8 µg/m³Yasothon, 15 February: 49.6 µg/m³Yasothon, 16 February: 37.8 µg/m³Yasothon, 17 February: 35.1 µg/m³Yasothon, 18 February: 59.7 µg/m³, 2.1× its usual 28.1Yasothon, 19 February: 67.0 µg/m³, 2.4× its usual 28.2Yasothon, 20 February: 58.1 µg/m³, 2.1× its usual 28.2Yasothon, 21 February: 48.8 µg/m³Yasothon, 22 February: 49.3 µg/m³Yasothon, 23 February: 55.0 µg/m³Roi 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/m³Roi Et, 18 February: 53.0 µg/m³, 2.1× its usual 24.7Roi Et, 19 February: 47.0 µg/m³Roi Et, 20 February: 42.4 µg/m³Roi Et, 21 February: 35.8 µg/m³Roi Et, 22 February: 35.7 µg/m³Roi Et, 23 February: 44.9 µg/m³Si 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/m³Si Sa Ket, 14 February: 40.4 µg/m³Si Sa Ket, 15 February: 46.4 µg/m³Si Sa Ket, 16 February: no readingSi Sa Ket, 17 February: no readingSi Sa Ket, 18 February: 46.7 µg/m³, 2.1× its usual 22.6Si Sa Ket, 19 February: no readingSi Sa Ket, 20 February: 43.9 µg/m³Si Sa Ket, 21 February: 39.1 µg/m³Si Sa Ket, 22 February: 38.6 µg/m³Si Sa Ket, 23 February: 49.2 µg/m³Sakon NakhonSakon Nakhon, 10 February: 9.8 µg/m³Sakon Nakhon, 11 February: no readingSakon Nakhon, 12 February: no readingSakon Nakhon, 13 February: 19.3 µg/m³Sakon Nakhon, 14 February: 22.6 µg/m³Sakon Nakhon, 15 February: 30.2 µg/m³Sakon Nakhon, 16 February: 26.3 µg/m³Sakon Nakhon, 17 February: 20.5 µg/m³Sakon Nakhon, 18 February: 37.1 µg/m³, 2.1× its usual 17.6Sakon Nakhon, 19 February: 31.2 µg/m³Sakon Nakhon, 20 February: no readingSakon Nakhon, 21 February: no readingSakon Nakhon, 22 February: 44.5 µg/m³Sakon Nakhon, 23 February: 50.0 µg/m³Ubon RatchathaniUbon Ratchathani, 10 February: 25.3 µg/m³Ubon Ratchathani, 11 February: no readingUbon Ratchathani, 12 February: no readingUbon Ratchathani, 13 February: 39.7 µg/m³Ubon Ratchathani, 14 February: 44.4 µg/m³Ubon Ratchathani, 15 February: 44.4 µg/m³Ubon Ratchathani, 16 February: no readingUbon Ratchathani, 17 February: no readingUbon Ratchathani, 18 February: 49.7 µg/m³Ubon Ratchathani, 19 February: 68.6 µg/m³, 2.2× its usual 30.5Ubon Ratchathani, 20 February: 64.0 µg/m³, 2.0× its usual 31.7Ubon Ratchathani, 21 February: 63.1 µg/m³Ubon Ratchathani, 22 February: 58.0 µg/m³Ubon Ratchathani, 23 February: 56.0 µg/m³Amnat CharoenAmnat Charoen, 10 February: 13.8 µg/m³Amnat Charoen, 11 February: no readingAmnat Charoen, 12 February: no readingAmnat Charoen, 13 February: 25.1 µg/m³Amnat Charoen, 14 February: 31.7 µg/m³Amnat Charoen, 15 February: 35.8 µg/m³Amnat Charoen, 16 February: 25.4 µg/m³Amnat Charoen, 17 February: 26.1 µg/m³Amnat Charoen, 18 February: 45.9 µg/m³Amnat Charoen, 19 February: 61.1 µg/m³, 2.5× its usual 24.9Amnat Charoen, 20 February: 55.6 µg/m³, 2.1× its usual 26.3Amnat Charoen, 21 February: 48.6 µg/m³Amnat Charoen, 22 February: 48.4 µg/m³Amnat Charoen, 23 February: 52.8 µg/m³10 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×
MukdahanMukdahan, Thailand3 72.319 February27.82.6×
Hua HinPrachuap Khiri Khan, Thailand3 64.615 February24.62.6×
Lop BuriLopburi, Thailand2 82.416 February33.32.5×
SaraburiSaraburi, Thailand3 77.315 February30.42.5×
Buri RamBuriram, Thailand1 65.015 February25.52.5×
Amnat CharoenAmnat Charoen, Thailand2 61.119 February24.92.5×
Lat KrabangBangkok, Thailand1 85.714 February35.82.4×
AranyaprathetSa Kaeo, Thailand2 83.515 February34.62.4×
Ban Samae DamBangkok, Thailand3 79.214 February32.72.4×
Bang KapiBangkok, Thailand3 77.014 February32.02.4×
LoeiLoei, Thailand1 76.418 February32.42.4×
Nakhon PathomNakhon Pathom, Thailand3 76.114 February31.32.4×
Phra PradaengSamut Prakan, Thailand2 69.314 February29.42.4×
YasothonYasothon, Thailand3 67.019 February28.22.4×
RatchaburiRatchaburi, Thailand2 91.515 February40.62.3×
Nong KhaemBangkok, Thailand2 81.414 February34.92.3×
Bueng KumBangkok, Thailand2 78.314 February33.52.3×
Ban Khlong PrawetBangkok, Thailand2 66.314 February28.72.3×
Nong Bua LamphuNong Bua Lamphu, Thailand2 58.518 February25.72.3×
Laem ChabangChon Buri, Thailand2 57.114 February24.92.3×
ChanthaburiChanthaburi, Thailand2 51.415 February22.82.3×
LampangLampang, Thailand3 98.017 February43.92.2×
Si Maha PhotPrachin Buri, Thailand1 83.215 February37.02.2×
Khan Na YaoBangkok, Thailand2 78.314 February36.02.2×
Khlong LuangPathum Thani, Thailand2 77.815 February34.82.2×
Kamphaeng PhetKamphaeng Phet, Thailand1 76.717 February35.42.2×
PhetchaburiPhetchaburi, Thailand1 73.815 February33.52.2×
Mueang NonthaburiNonthaburi, Thailand2 72.114 February33.22.2×
Saphan SungBangkok, Thailand1 71.314 February32.82.2×
BangkokBangkok, Thailand2 70.514 February31.42.2×
Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand2 69.114 February30.92.2×
Ubon RatchathaniUbon Ratchathani, Thailand2 68.619 February30.52.2×
Suphan BuriSuphan Buri, Thailand3 66.815 February29.82.2×
RayongRayong, Thailand1 53.914 February24.92.2×
Bang NaBangkok, Thailand1 75.614 February36.32.1×
Sai MaiBangkok, Thailand1 67.214 February32.02.1×
Nong ChokBangkok, Thailand1 65.713 February31.32.1×
Udon ThaniUdon Thani, Thailand3 54.815 February25.72.1×
Roi EtRoi Et, Thailand1 53.018 February24.72.1×
Si Sa KetSi Sa Ket, Thailand1 46.718 February22.62.1×
Sakon NakhonSakon Nakhon, Thailand1 37.118 February17.62.1×
RanongRanong province, Thailand1 36.413 February17.72.1×
Chai NatChai Nat, Thailand1 73.416 February36.12.0×
PhetchabunPhetchabun, Thailand2 70.517 February34.62.0×
Lak SiBangkok, Thailand2 70.413 February35.12.0×
Ban ChangRayong, Thailand1 55.014 February26.92.0×
Nakhon NayokNakhon Nayok, Thailand1 49.215 February24.52.0×

Daily means in µg/m³, over the days each city counted in this episode. Highest: its highest of those days. Usual: the city's median for the time of year of that day (its days within 21 days of the date, every year, leaving out the week around it). Above usual: its highest day against that, with a usual under 5 µg/m³ taken as 5.

Against other episodes in Thailand

Number 2 of 23 episodes in Thailand since our records began, by cities reached.

Bars: cities reached; colour: the level of the episode's highest daily reading. All 23.

Use this page

SmogRank, Thailand, February 2024: 51 cities with PM2.5 at twice their usual or more, 13 to 20 February 2024, smogrank.com/episodes/2024-02-thailand (accessed 4 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.