SmogRank / World / Thailand / January 2024

Most polluted cities in Thailand, January 2024

65 cities in Thailand ranked by their average PM2.5 over the 31 days. Worst: Ratchaburi at 55.4 µg/m³, #24 of 2,056 cities in the world. Cleanest: Sakon Nakhon at 13.4. A city needs measurements on 70% of the days to be ranked.

← Ratchaburi 55.4 µg/m³ 50 µg/m³0
Every city in Thailand ranked for January 2024, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1RatchaburiRatchaburi
    150
  2. 2Samut SakhonSamut Sakhon
    149
  3. 3SukhothaiSukhothai
    144
  4. 4Khlong Sam WaBangkok
    139
  5. 5Lat KrabangBangkok
    137
  6. 6Nong KhaemBangkok
    136
  7. 7Ban Samae DamBangkok
    134
  8. 8Bang NaBangkok
    131
  9. 9Khlong LuangPathum Thani
    129
  10. 10Bueng KumBangkok
    126
  11. 10Lak SiBangkok
    126
  12. 12Khan Na YaoBangkok
    124
  13. 13AranyaprathetSa Kaeo
    124
  14. 14Sing BuriSing Buri
    123
  15. 15Nakhon PathomNakhon Pathom
    122
  16. 15Chai NatChai Nat
    122
  17. 17Mueang NonthaburiNonthaburi
    122
  18. 18Saphan SungBangkok
    121
  19. 19LampangLampang
    120
  20. 20Bang KapiBangkok
    119
  21. 21Nong ChokBangkok
    118
  22. 22Suphan BuriSuphan Buri
    117
  23. 23Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya
    116
  24. 24BangkokBangkok
    112
  25. 25Sai MaiBangkok
    111
  26. 26Ban Khlong PrawetBangkok
    110
  27. 27Nakhon SawanNakhon Sawan
    110
  28. 28Phra PradaengSamut Prakan
    108
  29. 29Bang Bo DistrictSamut Prakan
    107
  30. 30Laem ChabangChon Buri
    107
  31. 31SaraburiSaraburi
    106
  32. 32Ban ChangRayong
    104
  33. 33Nakhon RatchasimaNakhon Ratchasima
    104
  34. 34Hua HinPrachuap Khiri Khan
    102
  35. 35RayongRayong
    101
  36. 36Samut PrakanSamut Prakan
    100
  37. 36PhichitPhichit
    100
  38. 38UttaraditUttaradit
    99
  39. 39PhraePhrae
    99
  40. 40NanNan
    98
  41. 41TratTrat
    93
  42. 42Mae SaiChiang Rai
    91
  43. 43ChanthaburiChanthaburi
    86
  44. 44KalasinKalasin
    86
  45. 45Ubon RatchathaniUbon Ratchathani
    85
  46. 46ChaiyaphumChaiyaphum
    84
  47. 47Nakhon NayokNakhon Nayok
    84
  48. 48Chiang RaiChiang Rai
    83
  49. 49Khon KaenKhon Kaen
    82
  50. 50YasothonYasothon
    81
  51. 51Chiang MaiChiang Mai
    80
  52. 52Buri RamBuriram
    80
  53. 53MukdahanMukdahan
    78
  54. 54RanongRanong province
    75
  55. 55Surat ThaniSurat Thani
    73
  56. 56YalaYala
    72
  57. 57SatunSatun
    72
  58. 57Nong Bua LamphuNong Bua Lamphu
    72
  59. 59Nakhon Si ThammaratNakhon Si Thammarat
    70
  60. 60Roi EtRoi Et
    70
  61. 61TrangTrang
    69
  62. 62Udon ThaniUdon Thani
    68
  63. 63Amnat CharoenAmnat Charoen
    65
  64. 64SadaoSongkhla
    60
  65. 65Sakon NakhonSakon Nakhon
    59
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

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SmogRank, most polluted cities in Thailand, PM2.5, January 2024, smogrank.com/th/history/2024-01 (accessed 2 Oct 2026).

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