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. =1192MatsuyamaEhime, Japan 0%0 of 30
  2. =1192TullnLower Austria, Austria 0%0 of 30
  3. =1192Klagenfurt am WörtherseeCarinthia, Austria 0%0 of 30
  4. =1192EisenzickenBurgenland, Austria 0%0 of 30
  5. =1192BeerselFlanders, Belgium 0%0 of 29
  6. =1192Kaldenkirchenlast full day 10 OctNorth Rhine-Westphalia, Germany 0%0 of 26
  7. =1192IngolstadtBavaria, Germany 0%0 of 30
  8. =1192ParisÎle-de-France, France 0%0 of 30
  9. =1192GardanneProvence-Alpes-Côte d'Azur, France 0%0 of 30
  10. =1192ArlesProvence-Alpes-Côte d'Azur, France 0%0 of 30
  11. =1192VeszprémVeszprém, Hungary 0%0 of 30
  12. =1192PrievidzaTrenčín Region, Slovakia 0%0 of 30
  13. =1192Nakło nad NoteciąKujawsko-Pomorskie, Poland 0%0 of 28
  14. =1192BogatyniaLower Silesia, Poland 0%0 of 30
  15. =1192Sondriolast full day 11 OctLombardy, Italy 0%0 of 28
  16. =1192CeljeUrban Municipality of Celje, Slovenia 0%0 of 30
  17. =1192Upper AltonIllinois, United States 0%0 of 30
  18. =1192Kansas CityKansas, United States 0%0 of 28
  19. =1192College StationTexas, United States 0%0 of 28
  20. =1192Timberwood ParkTexas, United States 0%0 of 30
  21. =1192Calumet CityIllinois, United States 0%0 of 30
  22. =1192Elk Grovelast full day 11 OctCalifornia, United States 0%0 of 21
  23. =1192Thousand OaksCalifornia, United States 0%0 of 25
  24. =1192LewistonIdaho, United States 0%0 of 30
  25. =1192AsoKumamoto, Japan 0%0 of 30
  26. =1192KinokawaWakayama, Japan 0%0 of 30
  27. =1192YawatahamaEhime, Japan 0%0 of 30
  28. =1192UkihaFukuoka, Japan 0%0 of 30
  29. =1229AthensAttica, Greece 0%0 of 30
  30. =1229ChuncheonGangwon-do, South Korea 0%0 of 29
  31. =1229ShingūWakayama, Japan 0%0 of 30
  32. =1229TakamatsuKagawa, Japan 0%0 of 30
  33. =1229ShimonosekiYamaguchi, Japan 0%0 of 30
  34. =1229ShimogamoOkayama, Japan 0%0 of 30
  35. =1229ShibukawaGunma, Japan 0%0 of 30
  36. =1229ShibataNiigata, Japan 0%0 of 29
  37. =1229NakatsuOita, Japan 0%0 of 30
  38. =1229MitaiMiyazaki, Japan 0%0 of 30
  39. =1229KameyamaMie, Japan 0%0 of 26
  40. =1229IsahayaNagasaki, Japan 0%0 of 30
  41. =1229HiroshimaHiroshima, Japan 0%0 of 30
  42. =1229IshinomakiMiyagi, Japan 0%0 of 30
  43. =1229SingletonNew South Wales, Australia 0%0 of 22
  44. =1229NewcastleNew South Wales, Australia 0%0 of 30
  45. =1229Los BarriosAndalusia, Spain 0%0 of 30
  46. =1229UtrechtUtrecht, The Netherlands 0%0 of 29
  47. =1229RotterdamSouth Holland, The Netherlands 0%0 of 30
  48. =1229Neu-Ulmlast full day 10 OctBavaria, Germany 0%0 of 27
  49. =1229Königs Wusterhausenlast full day 10 OctBrandenburg, Germany 0%0 of 27
  50. =1229Dattelnlast full day 10 OctNorth Rhine-Westphalia, Germany 0%0 of 26
  51. =1229Arzberglast full day 10 OctBavaria, Germany 0%0 of 27
  52. =1229MarseilleProvence-Alpes-Côte d'Azur, France 0%0 of 30
  53. =1229San Luis de la Pazlast full day 11 OctGuanajuato, Mexico 0%0 of 22
  54. =1229AthensGeorgia, United States 0%0 of 30
  55. =1229Wood RiverIllinois, United States 0%0 of 30
  56. =1229Valley StationKentucky, United States 0%0 of 29
  57. =1229Lemaylast full day 5 OctMissouri, United States 0%0 of 22
  58. =1229HernandoMississippi, United States 0%0 of 30
  59. =1229Saint AndrewsSouth Carolina, United States 0%0 of 30
  60. =1229HollandMichigan, United States 0%0 of 26
  61. =1229KaiapoiCanterbury, New Zealand 0%0 of 30
  62. =1229GotōNagasaki, Japan 0%0 of 30
  63. =1263AranyaprathetSa Kaeo, Thailand 0%0 of 21
  64. =1263HwacheonGangwon-do, South Korea 0%0 of 29
  65. =1263TanabeWakayama, Japan 0%0 of 30
  66. =1263TakahashiOkayama, Japan 0%0 of 30
  67. =1263KurashikiOkayama, Japan 0%0 of 30
  68. =1263Kanzakimachi-kanzakiSaga, Japan 0%0 of 30
  69. =1263HashimotoWakayama, Japan 0%0 of 30
  70. =1263AlgecirasAndalusia, Spain 0%0 of 27
  71. =1263San Pawl il-BaħarSaint Paul’s Bay, Malta 0%0 of 25
  72. =1263TilburgNorth Brabant, The Netherlands 0%0 of 29
  73. =1263MedemblikNorth Holland, The Netherlands 0%0 of 30
  74. =1263PerchtoldsdorfLower Austria, Austria 0%0 of 29
  75. =1263RoeselareFlanders, Belgium 0%0 of 30
  76. =1263AntwerpFlanders, Belgium 0%0 of 30
  77. =1263Rostocklast full day 10 OctMecklenburg-Vorpommern, Germany 0%0 of 27
  78. =1263Magdeburglast full day 10 OctSaxony-Anhalt, Germany 0%0 of 27
  79. =1263Jüchenlast full day 10 OctNorth Rhine-Westphalia, Germany 0%0 of 27
  80. =1263Halstenbeklast full day 10 OctSchleswig-Holstein, Germany 0%0 of 23
  81. =1263Hagenlast full day 10 OctNorth Rhine-Westphalia, Germany 0%0 of 27
  82. =1263Elsterwerdalast full day 10 OctBrandenburg, Germany 0%0 of 27
  83. =1263Altenburglast full day 10 OctThuringia, Germany 0%0 of 27
  84. =1263EdenderryLeinster, Ireland 0%0 of 30
  85. =1263HnúšťaBanská Bystrica Region, Slovakia 0%0 of 30
  86. =1263Murska SobotaUrban Municipality of Murska Sobota, Slovenia 0%0 of 30
  87. =1263KranjUrban Municipality of Kranj, Slovenia 0%0 of 30
  88. =1263Warner RobinsGeorgia, United States 0%0 of 30
  89. =1263GlenpoolOklahoma, United States 0%0 of 29
  90. =1263Ponca CityOklahoma, United States 0%0 of 29
  91. =1263BridgeviewIllinois, United States 0%0 of 30
  92. =1263LivermoreCalifornia, United States 0%0 of 29
  93. =1263EdmontonAlberta, Canada 0%0 of 30
  94. =1263NiizaSaitama, Japan 0%0 of 30
  95. =1263TakuSaga, Japan 0%0 of 30
  96. =1263AridaWakayama, Japan 0%0 of 30
  97. =1297VilniusVilnius, Lithuania 0%0 of 25
  98. =1297SekimachiGifu, Japan 0%0 of 30
  99. =1297NakamuraKochi, Japan 0%0 of 29
  100. =1297NagasakiNagasaki, Japan 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).