SmogRank / Rankings

All 3,290 cities by unhealthy days, last 30 days

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

CPCB in India: no readings since 12 Oct (488 monitors). EEA in Spain: no readings since 13 Oct (310 monitors). Their cities show older figures or are missing from this board, not clean.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Cities with the same share are ordered by more unhealthy days, then by the higher average.

  1. =1481WillebroekFlanders, Belgium 0%0 of 30
  2. =1481BeverenFlanders, Belgium 0%0 of 30
  3. =1481Weimarlast full day 10 OctThuringia, Germany 0%0 of 27
  4. =1481UlmBaden-Wurttemberg, Germany 0%0 of 30
  5. =1481Frankfurt (Oder)Brandenburg, Germany 0%0 of 28
  6. =1481Düsseldorflast full day 10 OctNorth Rhine-Westphalia, Germany 0%0 of 27
  7. =1481CalaisHauts-de-France, France 0%0 of 30
  8. =1481Boulogne-sur-MerHauts-de-France, France 0%0 of 25
  9. =1481BéthuneHauts-de-France, France 0%0 of 30
  10. =1481AnnecyAuvergne-Rhône-Alpes, France 0%0 of 28
  11. =1481Kuils RiverWestern Cape, South Africa 0%0 of 30
  12. =1481Taubatélast full day 8 OctSão Paulo, Brazil 0%0 of 22
  13. =1481New OrleansLouisiana, United States 0%0 of 30
  14. =1481LawtonOklahoma, United States 0%0 of 29
  15. =1481Jacksonlast full day 8 OctTennessee, United States 0%0 of 25
  16. =1481KnoxvilleTennessee, United States 0%0 of 30
  17. =1481Cedar ParkTexas, United States 0%0 of 30
  18. =1481Blue IslandIllinois, United States 0%0 of 28
  19. =1481Oak LawnIllinois, United States 0%0 of 30
  20. =1481SkokieIllinois, United States 0%0 of 28
  21. =1481OceanoCalifornia, United States 0%0 of 30
  22. =1481South Lake TahoeCalifornia, United States 0%0 of 29
  23. =1481CalgaryAlberta, Canada 0%0 of 30
  24. =1481HiragiKagawa, Japan 0%0 of 30
  25. =1481HigashikurumeTokyo, Japan 0%0 of 30
  26. =1526GyeongjuGyeongsangbuk-do, South Korea 0%0 of 30
  27. =1526YaoOsaka, Japan 0%0 of 30
  28. =1526Ureshinomachi-shimojukuSaga, Japan 0%0 of 30
  29. =1526TsuMie, Japan 0%0 of 30
  30. =1526ObitaNagasaki, Japan 0%0 of 30
  31. =1526NishinomiyaHyōgo, Japan 0%0 of 30
  32. =1526KobeHyōgo, Japan 0%0 of 30
  33. =1526KasaokaOkayama, Japan 0%0 of 29
  34. =1526IzumiOsaka, Japan 0%0 of 30
  35. =1526HanyūSaitama, Japan 0%0 of 30
  36. =1526HagiYamaguchi, Japan 0%0 of 30
  37. =1526AiharaKanagawa, Japan 0%0 of 30
  38. =1526MinawaKanagawa, Japan 0%0 of 30
  39. =1526YoshiokaMiyagi, Japan 0%0 of 28
  40. =1526MaitlandNew South Wales, Australia 0%0 of 30
  41. =1526UtielValencia, Spain 0%0 of 30
  42. =1526WaalreNorth Brabant, The Netherlands 0%0 of 30
  43. =1526The HagueSouth Holland, The Netherlands 0%0 of 30
  44. =1526EnschedeOverijssel, The Netherlands 0%0 of 28
  45. =1526EindhovenNorth Brabant, The Netherlands 0%0 of 21
  46. =1526Wiener NeustadtLower Austria, Austria 0%0 of 30
  47. =1526SchwazTyrol, Austria 0%0 of 30
  48. =1526KapellenFlanders, Belgium 0%0 of 30
  49. =1526Wismarlast full day 10 OctMecklenburg-Vorpommern, Germany 0%0 of 27
  50. =1526Wesellast full day 10 OctNorth Rhine-Westphalia, Germany 0%0 of 26
  51. =1526Schwandorf in Bayernlast full day 10 OctBavaria, Germany 0%0 of 27
  52. =1526LudwigsburgBaden-Wurttemberg, Germany 0%0 of 30
  53. =1526Luckenwaldelast full day 10 OctBrandenburg, Germany 0%0 of 27
  54. =1526Kaiserslauternlast full day 10 OctRheinland-Pfalz, Germany 0%0 of 27
  55. =1526DenainHauts-de-France, France 0%0 of 30
  56. =1526CannesProvence-Alpes-Côte d'Azur, France 0%0 of 30
  57. =1526KroměřížZlín, Czechia 0%0 of 30
  58. =1526AvilésAsturias, Spain 0%0 of 30
  59. =1526Tula de AllendeHidalgo, Mexico 0%0 of 25
  60. =1526Ciudad JuárezChihuahua, Mexico 0%0 of 30
  61. =1526BessemerAlabama, United States 0%0 of 30
  62. =1526Ferry Passlast full day 7 OctFlorida, United States 0%0 of 24
  63. =1526Kendale LakesFlorida, United States 0%0 of 30
  64. =1526ColumbusGeorgia, United States 0%0 of 30
  65. =1526EvansvilleIndiana, United States 0%0 of 30
  66. =1526OlatheKansas, United States 0%0 of 30
  67. =1526Mission BendTexas, United States 0%0 of 25
  68. =1526BrookfieldIllinois, United States 0%0 of 30
  69. =1526Evergreen ParkIllinois, United States 0%0 of 28
  70. =1526NilesIllinois, United States 0%0 of 28
  71. =1526OrcuttCalifornia, United States 0%0 of 30
  72. =1526PrunedaleCalifornia, United States 0%0 of 22
  73. =1526RosevilleCalifornia, United States 0%0 of 26
  74. =1526AuburnWashington, United States 0%0 of 30
  75. =1526AgassizBritish Columbia, Canada 0%0 of 30
  76. =1526Misato, SaitamaSaitama, Japan 0%0 of 30
  77. =1526MotosuGifu, Japan 0%0 of 28
  78. =1526ItoshimaFukuoka, Japan 0%0 of 30
  79. =1526SaikaiNagasaki, Japan 0%0 of 30
  80. =1580Augustówlast full day 5 OctPodlasie, Poland 0%0 of 21
  81. =1580YanaiYamaguchi, Japan 0%0 of 30
  82. =1580TondabayashichōOsaka, Japan 0%0 of 30
  83. =1580TokushimaTokushima, Japan 0%0 of 30
  84. =1580HigashinozoeHyōgo, Japan 0%0 of 30
  85. =1580KusatsuShiga, Japan 0%0 of 30
  86. =1580KurihamaKanagawa, Japan 0%0 of 30
  87. =1580HonjōSaitama, Japan 0%0 of 30
  88. =1580HamamatsuShizuoka, Japan 0%0 of 29
  89. =1580GionHiroshima, Japan 0%0 of 30
  90. =1580HikariYamaguchi, Japan 0%0 of 30
  91. =1580TamworthNew South Wales, Australia 0%0 of 26
  92. =1580MackayQueensland, Australia 0%0 of 30
  93. =1580HaarlemNorth Holland, The Netherlands 0%0 of 30
  94. =1580ViennaVienna, Austria 0%0 of 30
  95. =1580GänserndorfLower Austria, Austria 0%0 of 30
  96. =1580MenenFlanders, Belgium 0%0 of 30
  97. =1580MechelenFlanders, Belgium 0%0 of 30
  98. =1580TitzNorth Rhine-Westphalia, Germany 0%0 of 30
  99. =1580PotsdamBrandenburg, Germany 0%0 of 30
  100. =1580Neuwiedlast full day 10 OctRheinland-Pfalz, Germany 0%0 of 27

What stands behind each figure: Checked at 2+ sites One reference monitor Low-cost sensors About these marks

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
Unhealthy for 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, Turkey and Iran, which publish only on their own websites. We are building the reader for China's network. The networks of Turkey and Iran don't answer requests from outside their countries, so we can't read them. Most cities there are missing from this board, not clean. Why.

Use this board

SmogRank, all cities ranked by unhealthy days (PM2.5), last 30 days to 14 Oct 2026, 07:00 UTC: each city's share of its measured days with a daily mean over 35.4 µg/m³, cities measured on 21 or more of the 30 days. Monitor data from national networks via OpenAQ and the publishers listed at smogrank.com/sources. smogrank.com/rankings?w=30d&by=days. Ranked on low-cost sensors, with no reference monitor in the city: #1 Peshawar, #2 Multan, #5 Kasur, #7 Gujranwala, #8 Lahore, #9 Faisalabad and #10 Jammu. Some values from Sensor.Community, ODbL. Some readings from Vietnam's government monitors; Department of Environment, Nepal; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver); Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published.

Download top 10 by average (PNG)

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 2026-10-14 07:07 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; Department of Environment, Nepal; Aurassure; RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver); Umhverfisstofnun (Environment Agency of Iceland), no reuse terms published (why we use them).