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. 796AjikiChiba, Japan 500.6×▲145
  2. 796Toongabbie WestNew South Wales, Australia 500.6×▼314
  3. 796DaytonOhio, United States 500.6×▲534
  4. 796HighlandsTexas, United States 500.6×▲265
  5. 796DavenportIowa, United States 500.6×▲236
  6. 796Fort DodgeIowa, United States 500.6×▼422
  7. 796PortageIndiana, United States 500.6×▲331
  8. 796WaukeshaWisconsin, United States 500.6×▲254
  9. 796BakersfieldCalifornia, United States 500.6×▲226
  10. 796RichmondCalifornia, United States 500.6×▼583
  11. 796MotonaChiba, Japan 500.6×▼57
  12. 796KamagayaChiba, Japan 500.6×▼22
  13. 796Jordan SpringsNew South Wales, Australia 500.6×▼533
  14. 814Krasnogorsklow-cost sensorsMoscow Oblast, Russia 490.6×
  15. 814HwasunJeollanam-do, South Korea 490.6×▼481
  16. 814AndongGyeongsangbuk-do, South Korea 490.6×▼434
  17. 814MitaiMiyazaki, Japan 490.6×▲373
  18. 814KisarazuChiba, Japan 490.6×▼85
  19. 814GwangyangJeollanam-do, South Korea 490.6×▼370
  20. 814SakuraChiba, Japan 490.6×▼62
  21. 814Dresdenlow-cost sensorsSaxony, Germany 490.6×
  22. 814DěčínÚstí nad Labem Region, Czechia 490.6×▲158
  23. 814ZapopanJalisco, Mexico 490.6×▲55
  24. 814MurraysvilleNorth Carolina, United States 490.6×▼60
  25. 814AppletonWisconsin, United States 490.6×▲366
  26. 814BramptonOntario, Canada 490.6×▲415
  27. 814MineYamaguchi, Japan 490.6×▲22
  28. 828SuwałkiPodlasie, Poland 490.6×▲207
  29. 828GaigeturiJeju-do, South Korea 490.6×▼181
  30. 828YokosukaKanagawa, Japan 490.6×▼119
  31. 828NakamuraKochi, Japan 490.6×▼49
  32. 828MatsudoChiba, Japan 490.6×▲23
  33. 828IbiGifu, Japan 490.6×▼167
  34. 828ŌyauchiFukushima, Japan 490.6×▼125
  35. 828ZnojmoSouth Moravian, Czechia 490.6×▲1088
  36. 828HuntsvilleAlabama, United States 490.6×▲1172
  37. 828Lexington-FayetteKentucky, United States 490.6×▲989
  38. 828MolineIllinois, United States 490.6×▲251
  39. 828Redwood CityCalifornia, United States 490.6×▼90
  40. 840GuanshanTaiwan, Taiwan 480.6×▼115
  41. 840AshikagaTochigi, Japan 480.6×▼245
  42. 840YachimataChiba, Japan 480.6×
  43. 840GyálPest County, Hungary 480.6×▲352
  44. 840MonterreyNuevo León, Mexico 480.6×
  45. 840SchrieverLouisiana, United States 480.6×▲285
  46. 840Cedar RapidsIowa, United States 480.6×▼40
  47. 840OaklandCalifornia, United States 480.6×▼172
  48. 840SacramentoCalifornia, United States 480.6×▲83
  49. 840VallejoCalifornia, United States 480.6×▼51
  50. 840KitchenerOntario, Canada 480.6×▲325
  51. 840LondonOntario, Canada 480.6×▲814
  52. 840SeogwipoJeju-do, South Korea 480.6×▼258
  53. 840TsushimaNagasaki, Japan 480.6×▲66
  54. 840YeongamJeollanam-do, South Korea 480.6×▼556
  55. 855ChangwonGyeongsangnam-do, South Korea 480.6×▼361
  56. 855Barneveldlow-cost sensorsGelderland, The Netherlands 480.6×
  57. 855IngolstadtBavaria, Germany 480.6×▲818
  58. 855BartowFlorida, United States 480.6×▲651
  59. 855SomersetKentucky, United States 480.6×▲1106
  60. 855CaryIllinois, United States 480.6×▲370
  61. 855Columbia CityIndiana, United States 480.6×▲477
  62. 855OregonOhio, United States 480.6×▲1070
  63. 855TracyCalifornia, United States 480.6×▲257
  64. 855MinamiashigaraKanagawa, Japan 480.6×▼6
  65. 855InzaiChiba, Japan 480.6×▼173
  66. 866MikuniFukui, Japan 470.6×▼246
  67. 866Wedellow-cost sensorsSchleswig-Holstein, Germany 470.6×
  68. 866SlatinaSouth Moravian, Czechia 470.6×▲896
  69. 866BrzegOpole Voivodeship, Poland 470.6×▲506
  70. 866BessemerAlabama, United States 470.6×▲1016
  71. 866Saint MatthewsKentucky, United States 470.6×▲676
  72. 866Baton RougeLouisiana, United States 470.6×▲179
  73. 866ElkhartIndiana, United States 470.6×▲294
  74. 866LincolnCalifornia, United States 470.6×▲199
  75. 866ModestoCalifornia, United States 470.6×▲30
  76. 866MilwaukieOregon, United States 470.6×▲247
  77. 866MoranbahQueensland, Australia 470.6×▲20
  78. 878PołaniecŚwiętokrzyskie, Poland 470.6×▲11
  79. 878GeroGifu, Japan 470.6×▲645
  80. 878NishiwakiHyōgo, Japan 470.6×▼137
  81. 878KishiwadaOsaka, Japan 470.6×
  82. 878AioiHyōgo, Japan 470.6×▼128
  83. 878YeosuJeollanam-do, South Korea 470.6×▼397
  84. 878Ceglie MessapicaApulia, Italy 470.6×▼143
  85. 878JeffersonvilleIndiana, United States 470.6×▲764
  86. 878Valley StationKentucky, United States 470.6×▲604
  87. 878NashvilleTennessee, United States 470.6×▲521
  88. 878GreendaleWisconsin, United States 470.6×▲284
  89. 878TomahWisconsin, United States 470.6×▲25
  90. 878ParklandWashington, United States 470.6×▲372
  91. 878BarakiChiba, Japan 470.6×▼4
  92. 892RuseRuse, Bulgaria 460.6×▼603
  93. 892TonoshōKagawa, Japan 460.6×▼165
  94. 892Apeldoornlow-cost sensorsGelderland, The Netherlands 460.6×
  95. 892SrbacSrpska, Bosnia and Herzegovina 460.6×▼49
  96. 892OcalaFlorida, United States 460.6×▲248
  97. 892ColumbusGeorgia, United States 460.6×▲1028
  98. 892ShreveportLouisiana, United States 460.6×▼145
  99. 892GulfportMississippi, United States 460.6×▲533
  100. 892SpringfieldOhio, United States 460.6×▲652

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).