SmogRank / Rankings

All 2,540 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. 688HakubaNagano, Japan 520.6×▲445
  2. 702Krasnodarlow-cost sensorsKrasnodar Krai, Russia 520.6×
  3. 702JasłoSubcarpathia, Poland 520.6×▲307
  4. 702TokorozawaSaitama, Japan 520.6×▼83
  5. 702TakanabeMiyazaki, Japan 520.6×▲254
  6. 702IchinomiyaChiba, Japan 520.6×▲150
  7. 702NewcastleNew South Wales, Australia 520.6×▲93
  8. 702ChicagoIllinois, United States 520.6×▲388
  9. 702South BendIndiana, United States 520.6×▲542
  10. 702Green BayWisconsin, United States 520.6×▲480
  11. 702InabeMie, Japan 520.6×▼294
  12. 702NasukarasuyamaTochigi, Japan 520.6×▲88
  13. 702Dodong-riGyeongsangbuk-do, South Korea 520.6×▼131
  14. 714JarosławSubcarpathia, Poland 520.6×▲107
  15. 714NišCentral Serbia, Serbia 520.6×▼241
  16. 714UlsanUlsan, South Korea 520.6×▼151
  17. 714MasanGwangju, South Korea 520.6×▼494
  18. 714YaitaTochigi, Japan 520.6×▼55
  19. 714KushikinoKagoshima, Japan 520.6×▲163
  20. 714WakuyaMiyagi, Japan 520.6×▼300
  21. 714ŽarnovicaBanská Bystrica Region, Slovakia 520.6×▼116
  22. 714Frýdek-MístekMoravian-Silesian Region, Czechia 520.6×▲968
  23. 714GridleyCalifornia, United States 520.6×▲206
  24. 714San FranciscoCalifornia, United States 520.6×▼69
  25. 714UkiahCalifornia, United States 520.6×▲267
  26. 714TerraceBritish Columbia, Canada 520.6×▲1220
  27. 714MizunashiFukushima, Japan 520.6×▲383
  28. 714IkiNagasaki, Japan 520.6×▲271
  29. 729OkayamaOkayama, Japan 520.6×▼212
  30. 729Kameda-honchōNiigata, Japan 520.6×▲197
  31. 729InoKochi, Japan 520.6×▲35
  32. 729NagatoYamaguchi, Japan 520.6×▲51
  33. 729NaesŏGyeongsangnam-do, South Korea 520.6×▼284
  34. 729ŠahyNitra Region, Slovakia 520.6×▲273
  35. 729MartinŽilina Region, Slovakia 520.6×▲330
  36. 729KaliszGreater Poland, Poland 520.6×▲38
  37. 729Duque de CaxiasRio de Janeiro, Brazil 520.6×▼578
  38. 729AcariRio de Janeiro, Brazil 520.6×▼481
  39. 729New OrleansLouisiana, United States 520.6×▲514
  40. 729NorwoodOhio, United States 520.6×▲624
  41. 729Iowa CityIowa, United States 520.6×▲103
  42. 729Blue Islandlow-cost sensorsIllinois, United States 520.6×
  43. 729DetroitMichigan, United States 520.6×▲1042
  44. 729Grand RapidsMichigan, United States 520.6×▲472
  45. 729TurlockCalifornia, United States 520.6×▲266
  46. 729TacomaWashington, United States 520.6×▲403
  47. 729JōetsuNiigata, Japan 520.6×▼46
  48. 729BizenOkayama, Japan 520.6×▼93
  49. 729GotōNagasaki, Japan 520.6×▲170
  50. 750MokopaneLimpopo, South Africa 510.6×▲125
  51. 750Cheongsong gunGyeongsangbuk-do, South Korea 510.6×▼242
  52. 750TsuMie, Japan 510.6×▼275
  53. 750ShimogamoOkayama, Japan 510.6×▼144
  54. 750Kakogawachō-honmachiHyōgo, Japan 510.6×▲43
  55. 750OlomoucOlomouc Region, Czechia 510.6×▲469
  56. 750WrocławLower Silesia, Poland 510.6×▲116
  57. 750PaarlWestern Cape, South Africa 510.6×▼455
  58. 750JerseyvilleIllinois, United States 510.6×▲145
  59. 750EvansvilleIndiana, United States 510.6×▲730
  60. 750MiamiOklahoma, United States 510.6×▼631
  61. 750JolietIllinois, United States 510.6×▲360
  62. 750Oak LawnIllinois, United States 510.6×▲228
  63. 750MarshallMinnesota, United States 510.6×
  64. 764Korolevlow-cost sensorsMoscow Oblast, Russia 510.6×
  65. 764De AarNorthern Cape, South Africa 510.6×
  66. 764NeietsuGangwon-do, South Korea 510.6×▼299
  67. 764KunwiGyeongsangbuk-do, South Korea 510.6×▼262
  68. 764UrayasuChiba, Japan 510.6×▲59
  69. 764OgawamachiSaitama, Japan 510.6×▼92
  70. 764ImaichiTochigi, Japan 510.6×▲30
  71. 764GobōWakayama, Japan 510.6×▲46
  72. 764TřinecMoravian-Silesian Region, Czechia 510.6×▲557
  73. 764TepliceÚstí nad Labem Region, Czechia 510.6×▲342
  74. 764PaducahKentucky, United States 510.6×▲1047
  75. 764SpringfieldIllinois, United States 510.6×▲252
  76. 764BloomingtonIllinois, United States 510.6×▲460
  77. 764Royal Oaklow-cost sensorsMichigan, United States 510.6×▲1435
  78. 764Sioux FallsSouth Dakota, United States 510.6×▼42
  79. 764Alta SierraCalifornia, United States 510.6×▲109
  80. 780RzeszówSubcarpathia, Poland 510.6×▼143
  81. 780RadomMazovia, Poland 510.6×▼57
  82. 780Leskovaclow-cost sensorsCentral Serbia, Serbia 510.6×
  83. 780ObuseNagano, Japan 510.6×▼68
  84. 780HigashinozoeHyōgo, Japan 510.6×▼17
  85. 780Kaseda-shirakameKagoshima, Japan 510.6×▲371
  86. 780LeedsEngland, United Kingdom 510.6×▲73
  87. 780Wodzisław ŚląskiSilesia, Poland 510.6×▲308
  88. 780KutinaSisak-Moslavina, Croatia 510.6×▲33
  89. 780HernandoMississippi, United States 510.6×▼59
  90. 780Des PlainesIllinois, United States 510.6×▲419
  91. 780AndersonIndiana, United States 510.6×▲600
  92. 780DearbornMichigan, United States 510.6×▲704
  93. 780TorontoOntario, Canada 510.6×▲837
  94. 780SōsaChiba, Japan 510.6×▼7
  95. 780HiragiKagawa, Japan 510.6×▼110
  96. 796KazincbarcikaBorsod-Abaúj-Zemplén, Hungary 500.6×▲321
  97. 796NiskoSubcarpathia, Poland 500.6×▼397
  98. 796UenoharaYamanashi, Japan 500.6×▲12
  99. 796OnoHyōgo, Japan 500.6×
  100. 796KawaguchiTokushima, Japan 500.6×▼188

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 13 Oct 2026, 01:00 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: #1 Queenstown Estate, #3 Gaur, Madhesh, #5 Dubai, #6 Dhaka, #7 Multan, #8 Faisalabad, #9 Gujranwala and #10 Vientiane. Some values from Sensor.Community, ODbL. Some readings from Uzhydromet (Uzbekistan's Hydrometeorological Service); Vietnam's government monitors; 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 2026-10-13 01:07 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: Uzhydromet (Uzbekistan's Hydrometeorological Service); Vietnam's government monitors; 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).