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. =1580Jenalast full day 10 OctThuringia, Germany 0%0 of 27
  2. =1580Geralast full day 10 OctThuringia, Germany 0%0 of 27
  3. =1580Bützowlast full day 10 OctMecklenburg-Vorpommern, Germany 0%0 of 26
  4. =1580Bernburglast full day 10 OctSaxony-Anhalt, Germany 0%0 of 27
  5. =1580StrasbourgGrand Est, France 0%0 of 30
  6. =1580MulhouseGrand Est, France 0%0 of 30
  7. =1580MarignaneProvence-Alpes-Côte d'Azur, France 0%0 of 30
  8. =1580La GardeProvence-Alpes-Côte d'Azur, France 0%0 of 26
  9. =1580KolárovoNitra Region, Slovakia 0%0 of 30
  10. =1580Zacatepec de HidalgoMorelos, Mexico 0%0 of 29
  11. =1580SavannahGeorgia, United States 0%0 of 30
  12. =1580SpringfieldMissouri, United States 0%0 of 28
  13. =1580Park RidgeIllinois, United States 0%0 of 28
  14. =1580PeoriaIllinois, United States 0%0 of 30
  15. =1580FlorinCalifornia, United States 0%0 of 25
  16. =1580King CityCalifornia, United States 0%0 of 30
  17. =1580Meridianlast full day 7 OctIdaho, United States 0%0 of 24
  18. =1580GreshamOregon, United States 0%0 of 28
  19. =1580MillcreekUtah, United States 0%0 of 30
  20. =1580TacomaWashington, United States 0%0 of 30
  21. =1580HopeBritish Columbia, Canada 0%0 of 30
  22. =1580QuesnelBritish Columbia, Canada 0%0 of 29
  23. =1580VernonBritish Columbia, Canada 0%0 of 29
  24. =1580Barra da TijucaRio de Janeiro, Brazil 0%0 of 30
  25. =1580La Providencia Siglo XXIHidalgo, Mexico 0%0 of 30
  26. =1580TsushimaNagasaki, Japan 0%0 of 30
  27. =1580MunakataFukuoka, Japan 0%0 of 30
  28. =1580MineYamaguchi, Japan 0%0 of 30
  29. =1580FuefukiYamanashi, Japan 0%0 of 30
  30. =1630AkashiHyōgo, Japan 0%0 of 30
  31. =1630YokotaTokyo, Japan 0%0 of 30
  32. =1630TsuruokaYamagata, Japan 0%0 of 30
  33. =1630TosuSaga, Japan 0%0 of 30
  34. =1630TakatsukiOsaka, Japan 0%0 of 29
  35. =1630ShinshiroAichi, Japan 0%0 of 30
  36. =1630Shimo-tsumaIbaraki, Japan 0%0 of 27
  37. =1630SandachōHyōgo, Japan 0%0 of 30
  38. =1630ŌtsuShiga, Japan 0%0 of 30
  39. =1630NōgataFukuoka, Japan 0%0 of 30
  40. =1630Nara-shiNara, Japan 0%0 of 30
  41. =1630KoshigayaSaitama, Japan 0%0 of 30
  42. =1630KawaguchiTokushima, Japan 0%0 of 28
  43. =1630KanbaraShizuoka, Japan 0%0 of 30
  44. =1630IwakuniYamaguchi, Japan 0%0 of 30
  45. =1630HōfuYamaguchi, Japan 0%0 of 30
  46. =1630HikoneShiga, Japan 0%0 of 30
  47. =1630IwanumaMiyagi, Japan 0%0 of 30
  48. =1630ScunthorpeEngland, United Kingdom 0%0 of 30
  49. =1630ZaanstadNorth Holland, The Netherlands 0%0 of 28
  50. =1630JenbachTyrol, Austria 0%0 of 30
  51. =1630Groß-EnzersdorfLower Austria, Austria 0%0 of 30
  52. =1630GenkFlanders, Belgium 0%0 of 30
  53. =1630ErtveldeFlanders, Belgium 0%0 of 30
  54. =1630Walsrodelast full day 10 OctLower Saxony, Germany 0%0 of 27
  55. =1630Unnalast full day 10 OctNorth Rhine-Westphalia, Germany 0%0 of 27
  56. =1630Trierlast full day 10 OctRheinland-Pfalz, Germany 0%0 of 27
  57. =1630Kempten (Allgäu)last full day 10 OctBavaria, Germany 0%0 of 27
  58. =1630HeilbronnBaden-Wurttemberg, Germany 0%0 of 30
  59. =1630Brandenburg an der HavelBrandenburg, Germany 0%0 of 30
  60. =1630Ansbachlast full day 10 OctBavaria, Germany 0%0 of 27
  61. =1630Fontaine-lès-DijonBourgogne-Franche-Comté, France 0%0 of 30
  62. =1630Aix-en-ProvenceProvence-Alpes-Côte d'Azur, France 0%0 of 30
  63. =1630Aachenlast full day 10 OctNorth Rhine-Westphalia, Germany 0%0 of 27
  64. =1630PrichardAlabama, United States 0%0 of 26
  65. =1630GulfportMississippi, United States 0%0 of 30
  66. =1630CharlotteNorth Carolina, United States 0%0 of 30
  67. =1630FayettevilleNorth Carolina, United States 0%0 of 26
  68. =1630BrownsvilleTexas, United States 0%0 of 23
  69. =1630Port ArthurTexas, United States 0%0 of 23
  70. =1630Charlestonlast full day 10 OctWest Virginia, United States 0%0 of 27
  71. =1630Fort WayneIndiana, United States 0%0 of 30
  72. =1630ConcordCalifornia, United States 0%0 of 25
  73. =1630VictorvilleCalifornia, United States 0%0 of 30
  74. =1630KaizuGifu, Japan 0%0 of 28
  75. =1630SennanOsaka, Japan 0%0 of 30
  76. =1630Midwaylast full day 6 OctFlorida, United States 0%0 of 22
  77. =1630Osternienburger Landlast full day 10 OctSaxony-Anhalt, Germany 0%0 of 26
  78. =1630WakasugiFukuoka, Japan 0%0 of 30
  79. =1630YameFukuoka, Japan 0%0 of 30
  80. =1680VratsaVratsa, Bulgaria 0%0 of 30
  81. =1680YangjuGyeonggi-do, South Korea 0%0 of 30
  82. =1680SōkaSaitama, Japan 0%0 of 30
  83. =1680SakadoSaitama, Japan 0%0 of 30
  84. =1680NishiwakiHyōgo, Japan 0%0 of 30
  85. =1680KōtariKyoto, Japan 0%0 of 30
  86. =1680Kodamachō-kodamaminamiSaitama, Japan 0%0 of 29
  87. =1680KaratsuSaga, Japan 0%0 of 30
  88. =1680InoKochi, Japan 0%0 of 26
  89. =1680HachiōjiTokyo, Japan 0%0 of 30
  90. =1680ChitoseHokkaido, Japan 0%0 of 30
  91. =1680RockhamptonQueensland, Australia 0%0 of 23
  92. =1680SalzburgSalzburg, Austria 0%0 of 30
  93. =1680InnsbruckTyrol, Austria 0%0 of 30
  94. =1680Hainburg an der DonauLower Austria, Austria 0%0 of 30
  95. =1680LiègeWallonia, Belgium 0%0 of 30
  96. =1680GrimbergenFlanders, Belgium 0%0 of 30
  97. =1680DammeFlanders, Belgium 0%0 of 30
  98. =1680Weißenfelslast full day 10 OctSaxony-Anhalt, Germany 0%0 of 27
  99. =1680Lingenlast full day 10 OctLower Saxony, Germany 0%0 of 27
  100. =1680BremenBremen, Germany 0%0 of 30

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).