SmogRank / Rankings

All 2,582 cities by PM2.5, last 24 hours

Every city with enough measurements in this window, worst first.

CPCB in India: no readings since 7 Oct (488 monitors). EEA in Spain: no readings since 10 Oct (310 monitors). Catalonia Medi Ambient I Sostenibilitat in Spain: no readings since 9 Oct (26 monitors). Their cities are missing from this board, not clean.

  1. 199Sha TinSha Tin, Hong Kong 691.3×▲105
  2. 199WŏnjuGangwon-do, South Korea 691.3×▼4
  3. 203QuillotaValparaiso, Chile 691.2×▼39
  4. 204BakuBaki, Azerbaijan 691.2×▼49
  5. 204Ubon RatchathaniUbon Ratchathani, Thailand 691.2×▲631
  6. 204SurinSurin, Thailand 691.2×▲786
  7. 204TaipeiTaiwan, Taiwan 691.2×▲324
  8. 204Los ÁngelesBiobio, Chile 691.2×▼136
  9. 209PietermaritzburgKwaZulu-Natal, South Africa 691.2×▼91
  10. 209JungpyongNorth Chungcheong, South Korea 691.2×▲39
  11. 209ShinshiroAichi, Japan 691.2×▲53
  12. 209GamagōriAichi, Japan 691.2×▼25
  13. 213XizhouTaiwan, Taiwan 681.2×▲295
  14. 214TzaneenLimpopo, South Africa 681.2×▲1153
  15. 214Khlong LuangPathum Thani, Thailand 681.2×▲20
  16. 214New Taipei CityTaipei, Taiwan 681.2×▲289
  17. 217Nong KhaemBangkok, Thailand 681.2×▲56
  18. 217PuchuncavíValparaiso, Chile 681.2×▼40
  19. 217Khlong Sam WaBangkok, Thailand 681.2×▲6
  20. 220NishioAichi, Japan 681.2×▼70
  21. 221TokozaGauteng, South Africa 681.2×▲38
  22. 221Mae SaiChiang Rai, Thailand 681.2×▼64
  23. 221Chai NatChai Nat, Thailand 681.2×▲285
  24. 221CheonanChungcheongnam-do, South Korea 681.2×▼138
  25. 221SejongSejong-si, South Korea 681.2×▼111
  26. 226Lop BuriLopburi, Thailand 671.2×▲430
  27. 226KeelungTaiwan, Taiwan 671.2×▲520
  28. 226VillarricaAraucania, Chile 671.2×▼113
  29. 226AguascalientesAguascalientes, Mexico 671.2×▲115
  30. 230Almatylow-cost sensorsAlmaty, Kazakhstan 671.2×▼191
  31. 230GwangjuGyeonggi-do, South Korea 671.2×▲71
  32. 230AnseongGyeonggi-do, South Korea 671.2×▼20
  33. 233San Pedro de la PazBiobio, Chile 671.2×▼46
  34. 234OsornoLos Lagos Region, Chile 661.2×▼147
  35. 234TshiterekeLimpopo, South Africa 661.2×▼17
  36. 236Sidonlow-cost sensorsSouth Governorate, Lebanon 661.2×▼136
  37. 236HsinchuTaiwan, Taiwan 661.2×▲286
  38. 236GuadalajaraJalisco, Mexico 661.2×▲126
  39. 239ShulinTaipei, Taiwan 661.1×▲268
  40. 239EisenGyeongsangbuk-do, South Korea 661.1×▼24
  41. 239ChiryūAichi, Japan 661.1×▼39
  42. 242TemucoAraucania, Chile 661.1×▼118
  43. 242CuranilahueBiobio, Chile 661.1×▼136
  44. 244QuilpuéValparaiso, Chile 661.1×▼32
  45. 245YilanTaiwan, Taiwan 651.1×▲213
  46. 245ŌmutaFukuoka, Japan 651.1×▲71
  47. 245La UniónLos Ríos Region, Chile 651.1×▼96
  48. 245Khan Na YaoBangkok, Thailand 651.1×▲146
  49. 249GongjuChungcheongnam-do, South Korea 651.1×▼117
  50. 249Banja LukaSrpska, Bosnia and Herzegovina 651.1×▲112
  51. 249TalcaMaule Region, Chile 651.1×▼164
  52. 249ConcónValparaiso, Chile 651.1×▼47
  53. 253Ban Thai TanAng Thong, Thailand 651.1×▲295
  54. 254ThabazimbiLimpopo, South Africa 651.1×▲16
  55. 254FengshanTakao, Taiwan 651.1×▲37
  56. 254CoronelBiobio, Chile 651.1×▼132
  57. 257NonsanChungcheongnam-do, South Korea 651.1×▼171
  58. 258Phuntsholinglow-cost sensorsChukha, Bhutan 641.1×▲68
  59. 258Si Sa KetSi Sa Ket, Thailand 641.1×▲787
  60. 258KariyaAichi, Japan 641.1×▼99
  61. 258CopiapóAtacama, Chile 641.1×▼83
  62. 262HetaudaBagmati Province, Nepal 641.1×▲77
  63. 262YangjuGyeonggi-do, South Korea 641.1×▲378
  64. 262SintansinDaejeon, South Korea 641.1×▼131
  65. 262ChiguayanteBiobio, Chile 641.1×▼23
  66. 266ChaozhouTaiwan, Taiwan 641.1×▼61
  67. 266Donghae CityGangwon-do, South Korea 641.1×▼95
  68. 268AnjōAichi, Japan 641.1×▼67
  69. 268Viña del MarValparaiso, Chile 641.1×▼57
  70. 270SaraburiSaraburi, Thailand 641.1×▲251
  71. 270KinzanChungcheongnam-do, South Korea 641.1×▼79
  72. 270Korhogolow-cost sensorsSavanes District, Ivory Coast 641.1×
  73. 273ObrenovacCentral Serbia, Serbia 631.1×▼69
  74. 273Sing BuriSing Buri, Thailand 631.1×▲578
  75. 273Yangp'yŏngGyeonggi-do, South Korea 631.1×▲99
  76. 273ToyotaAichi, Japan 631.1×▼66
  77. 273SaseboNagasaki, Japan 631.1×▲167
  78. 273BirendranagarKarnali Pradesh, Nepal 631.1×▼87
  79. 273FuefukiYamanashi, Japan 631.1×▲22
  80. 280PhetchabunPhetchabun, Thailand 631.0×▲287
  81. 280DaejeonDaejeon, South Korea 631.0×▼137
  82. 280KoesanNorth Chungcheong, South Korea 631.0×▼119
  83. 283Si Maha PhotPrachin Buri, Thailand 631.0×▲140
  84. 284PokharaGandaki Pradesh, Nepal 631.0×▲114
  85. 284Uthai ThaniUthai Thani, Thailand 631.0×▲270
  86. 284MagongTaiwan, Taiwan 631.0×▲146
  87. 284GotembaShizuoka, Japan 631.0×▲39
  88. 284PueblaPuebla, Mexico 631.0×▲431
  89. 284TalaganteSantiago Metropolitan, Chile 631.0×▼130
  90. 284AntofagastaAntofagasta, Chile 631.0×▼81
  91. 291Bang KapiBangkok, Thailand 631.0×▲9
  92. 291KofuYamanashi, Japan 631.0×▲128
  93. 291HandaAichi, Japan 631.0×▼165
  94. 294EvatonGauteng, South Africa 631.0×▼160
  95. 294BangkokBangkok, Thailand 631.0×▲74
  96. 294SantyokuGangwon-do, South Korea 631.0×▼155
  97. 294Ciudad NezahualcoyotlMéxico, Mexico 631.0×▲621
  98. 294CorcoranCalifornia, United States 631.0×▲95
  99. 294Saphan SungBangkok, Thailand 631.0×▲88
  100. 294HigashigōSaga, Japan 631.0×▲51

Low-cost sensors: consumer units, counted only in cities with no government-grade monitor; they read close to reference monitors on the whole, but 15 to 25% high in humid air. How we use them.

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

Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites. We are building the reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. Most cities there are missing from this board, not clean. Why.

Use this board

SmogRank, all cities ranked by mean PM2.5 (µg/m³), last 24 hours to 12 Oct 2026, 22:00 UTC: each city's mean of its hourly values, cities measured in 18 or more of the 24 hours. Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/rankings. Ranked on low-cost sensors, with no reference monitor in the city: #3 Dhaka, #4 Gaur, Madhesh, #5 Dubai, #6 Vientiane, #7 Changchun, #8 Gujranwala and #9 Faisalabad. Some values from Sensor.Community, ODbL. Some readings from Vietnam's government monitors; Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Umhverfisstofnun (Environment Agency of Iceland); Love My Air (City and County of Denver), no reuse terms published.

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Updated 2026-10-12 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Vietnam's government monitors; Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Umhverfisstofnun (Environment Agency of Iceland); Love My Air (City and County of Denver), no reuse terms published (why we use them).