Air quality in Thailand
Air quality index (AQI⁺) and PM2.5 air pollution in Thailand • 00:51, Oct 14
Thailand Pollution Control DepartmentAir and Noise Quality Management Division BangkokGWF Air Detective VolunteerHappy & Healthy Bike LaneIntronics co.ltd.Panyarat High SchoolSISB SchoolGreenpeace ThailandCondo Ban Rim NumChulalongkorn University Demonstration Elementary SchoolShrewsbury International SchoolLadawan Kaset-NawaminChulalongkorn University Demonstration SchoolSt. Andrews International School Sukhumvit 107CM MediclinicLang Hong GoldsmithSupachot WangchindaThammasat UniversityYip In Tsoi GroupInternational Community SchoolDenla British School BangkokTara Pattana International SchoolAster International School BangkokTHroboticsBangkok Prep International SchoolEnvironmental Research & InnovationNopputtaWattana Wittaya AcademyOutdoor School Bangkok (OSB)Sriwittayapaknam SchoolThanaLa Petite Ecole - International SchoolSCG HeadquartersTYK Glass BangyaiThe American School of Bangkok (ASB)STOCK EXCHANGE OF THAILANDAmnuay Silpa SchoolScience and Technology Service Center, Chiang Mai University (STSC-CMU)Piyavit KhemarangsanHampton International SchoolAnya ราชพฤกษ์-นครอินทร์Space EateryPAOPAO BananaNoblewana WatcharapholSukkai Sabaijai PharmacyPrueklada Rangsit (Niti)Baan Siriporn ResortPhol Dhanya PCLPerfect Place Rt. SaimaMccraksakJohanChai Charoen Supplies Company LimitedNut NutthamonSIPATPHONGMawinSukhumvit81Anuwat SirithanchartNid PraditAlbiThe Royal Bangkok Sports ClubRaris Nantawan - SrinakarinAirQ@cnxHyundai Chiang RaiN.Team Accounting Co.,Ltd.Setthasiri Changwattana Prachachuen2Screen168LIGMAN Lighting Co., Ltd.SC Asset Corporation PLC.Embassy of Switzerland in ThailandGreets Control Co., Ltd.Somdul Bee SanctuaryZynthierKUNALAIChartered Square Building TSM GROUPThe Athenee Hotel, a Luxury Collection, BangkokNeurological Institute of ThailandDonmuang HotelKrisda Condotel Cliff & Parkvission parkPark Silomหมอจิรรุจน์Mitraparp Memorial Hospitalสนามชัย1Embassy of Belgium in BangkokKoh Chang Dental ClinicPattayaBob YouTube Beach CamGJNหมู่บ้านจัดสรรลดาวัลย์ รังสิตGood Time FoundationHotel MAYUVilla Maraya PhuketLake view parkSarutpat SutthithamODPC 1Bueng Phra SubdistrictChiang Mai MunicipalityUNICEF Laos AQM ProjectAmethyst Hotel PattayaPawai CoffeeMmSeoul Clinic ThailandCoffeeCommunityMajor Grand Hotelพีร์ ศรีเจริญPipat Dental-Repair Handpieceคลินิกทันตกรรมดีดีเดนทัลเดย์(DD Dental Day Clinic) ทำฟัน จัดฟัน บ้านบึงThe Box HouseDC Dental Clinic ChanthaburiMiradent Dental ClinicBanTonTan Pyramid ResortKlongyai Center HotelChill Hotel Khaoyai - โรงแรม ชิลล์ เขาใหญ่Hakuna Matata Villas PhraeEnvy BKPthanaras bumChiang Mai villaThesaban Tambon Ngim Subdistrict MunicipalityNopnaphawan Yuangphaกัญญาภัทร คิดอ่านThaksin HospitalSetthasiri Chaiyaphruek-Chaengwattanaองค์การบริหารส่วนตำบลลำทับอบต.ปอน
3 stations sponsored Thailand Pollution Control DepartmentAir and Noise Quality Management Division BangkokGWF Air Detective VolunteerHappy & Healthy Bike LaneIntronics co.ltd.Panyarat High SchoolSISB SchoolGreenpeace ThailandCondo Ban Rim NumChulalongkorn University Demonstration Elementary SchoolShrewsbury International SchoolLadawan Kaset-NawaminChulalongkorn University Demonstration SchoolSt. Andrews International School Sukhumvit 107CM MediclinicLang Hong GoldsmithSupachot WangchindaThammasat UniversityYip In Tsoi GroupInternational Community SchoolDenla British School BangkokTara Pattana International SchoolAster International School BangkokTHroboticsBangkok Prep International SchoolEnvironmental Research & InnovationNopputtaWattana Wittaya AcademyOutdoor School Bangkok (OSB)Sriwittayapaknam SchoolThanaLa Petite Ecole - International SchoolSCG HeadquartersTYK Glass BangyaiThe American School of Bangkok (ASB)STOCK EXCHANGE OF THAILANDAmnuay Silpa SchoolScience and Technology Service Center, Chiang Mai University (STSC-CMU)Piyavit KhemarangsanHampton International SchoolAnya ราชพฤกษ์-นครอินทร์Space EateryPAOPAO BananaNoblewana WatcharapholSukkai Sabaijai PharmacyPrueklada Rangsit (Niti)Baan Siriporn ResortPhol Dhanya PCLPerfect Place Rt. SaimaMccraksakJohanChai Charoen Supplies Company LimitedNut NutthamonSIPATPHONGMawinSukhumvit81Anuwat SirithanchartNid PraditAlbiThe Royal Bangkok Sports ClubRaris Nantawan - SrinakarinAirQ@cnxHyundai Chiang RaiN.Team Accounting Co.,Ltd.Setthasiri Changwattana Prachachuen2Screen168LIGMAN Lighting Co., Ltd.SC Asset Corporation PLC.Embassy of Switzerland in ThailandGreets Control Co., Ltd.Somdul Bee SanctuaryZynthierKUNALAIChartered Square Building TSM GROUPThe Athenee Hotel, a Luxury Collection, BangkokNeurological Institute of ThailandDonmuang HotelKrisda Condotel Cliff & Parkvission parkPark Silomหมอจิรรุจน์Mitraparp Memorial Hospitalสนามชัย1Embassy of Belgium in BangkokKoh Chang Dental ClinicPattayaBob YouTube Beach CamGJNหมู่บ้านจัดสรรลดาวัลย์ รังสิตGood Time FoundationHotel MAYUVilla Maraya PhuketLake view parkSarutpat SutthithamODPC 1Bueng Phra SubdistrictChiang Mai MunicipalityUNICEF Laos AQM ProjectAmethyst Hotel PattayaPawai CoffeeMmSeoul Clinic ThailandCoffeeCommunityMajor Grand Hotelพีร์ ศรีเจริญPipat Dental-Repair Handpieceคลินิกทันตกรรมดีดีเดนทัลเดย์(DD Dental Day Clinic) ทำฟัน จัดฟัน บ้านบึงThe Box HouseDC Dental Clinic ChanthaburiMiradent Dental ClinicBanTonTan Pyramid ResortKlongyai Center HotelChill Hotel Khaoyai - โรงแรม ชิลล์ เขาใหญ่Hakuna Matata Villas PhraeEnvy BKPthanaras bumChiang Mai villaThesaban Tambon Ngim Subdistrict MunicipalityNopnaphawan Yuangphaกัญญาภัทร คิดอ่านThaksin HospitalSetthasiri Chaiyaphruek-Chaengwattanaองค์การบริหารส่วนตำบลลำทับอบต.ปอน
3 stations sponsored 
Live most polluted city ranking
Real-time Thailand most polluted city ranking
| # | Cities | AQI⁺ US | |
|---|---|---|---|
| 1 |  Si Chiang Mai | 96 | |
| 2 | Chaloem Phra Kiat | 86 | |
| 3 | Mae Hi | 86 | |
| 4 | Hang Dong | 84 | |
| 5 | Chiang Rai | 83 | |
| 6 | Mae Rim | 80 | |
| 7 | Wiang Nuea | 80 | |
| 8 | San Kamphaeng | 71 | |
| 9 | Ban Waen | 70 | |
| 10 | Doi Saket | 70 |
2025 Thailand most polluted city
| Om Noi, Samut Sakhon | 94 |
Live cleanest city ranking
Real-time Thailand cleanest city ranking
| # | Cities | AQI⁺ US | |
|---|---|---|---|
| 1 | Kanchanaburi | 11 | |
| 2 | Ban Pho | 17 | |
| 3 | Ko Samui | 17 | |
| 4 | Trat | 17 | |
| 5 | Chanthaburi | 19 | |
| 6 | Song Khanong | 21 | |
| 7 | Ban Bueng | 22 | |
| 8 | Bang Kaeo | 22 | |
| 9 | Bang Pakong | 22 | |
| 10 | Bang Phli | 22 |
2025 Thailand cleanest city
| Phra Sing, Chiang Mai | 42 |
2025 Thailand air quality
2025 country air quality average
How polluted is Thailand?
In 2025 in Thailand, the annual PM2.5 concentration was 3.6 times the WHO annual PM2.5 guideline.
2025 AQI⁺ country ranking
Which country had the worst air quality in 2025?
Worldwide PM2.5 ranking
2025 Thailand global rank in air pollution
48/143
Wildfires in Thailand
Real-time information
Active fires
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Learn more about global air quality
Which is the most polluted state in Thailand?
- Amnat Charoen
- Ang Thong
- Bangkok
- Buriram
- Chachoengsao
- Chai Nat
- Chaiyaphum
- Changwat Bueng Kan
- Changwat Ubon Ratchathani
- Chanthaburi
- Chiang Mai
- Chiang Rai
- Chon Buri
- Chumphon
- Kalasin
- Kamphaeng Phet
- Kanchanaburi
- Khon Kaen
- Krabi
- Lampang
- Lamphun
- Loei
- Lopburi
- Mae Hong Son
- Maha Sarakham
- Mukdahan
- Nakhon Nayok
- Nakhon Pathom
- Nakhon Phanom
- Nakhon Ratchasima
- Nakhon Sawan
- Nakhon Si Thammarat
- Nan
- Narathiwat
- Nong Bua Lamphu
- Nong Khai
- Nonthaburi
- Pathum Thani
- Pattani
- Phangnga
- Phatthalung
- Phayao
- Phetchabun
- Phetchaburi
- Phichit
- Phitsanulok
- Phra Nakhon Si Ayutthaya
- Phrae
- Phuket
- Prachin Buri
- Prachuap Khiri Khan
- Ranong
- Ratchaburi
- Rayong
- Roi Et
- Sa Kaeo
- Sakon Nakhon
- Samut Prakan
- Samut Sakhon
- Samut Songkhram
- Sara Buri
- Satun
- Sing Buri
- Sisaket
- Songkhla
- Sukhothai
- Suphan Buri
- Surat Thani
- Surin
- Tak
- Trang
- Trat
- Udon Thani
- Uthai Thani
- Uttaradit
- Yala
- Yasothon
