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. 2297HayesEngland, United Kingdom 130.2×▼468
  2. 2297GloucesterEngland, United Kingdom 130.2×▼436
  3. 2297BristolEngland, United Kingdom 130.2×▼509
  4. 2297BournemouthEngland, United Kingdom 130.2×▼631
  5. 2297GothenburgVästra Götaland, Sweden 130.2×▲35
  6. 2297Weinheimlow-cost sensorsBaden-Wurttemberg, Germany 130.2×
  7. 2297Landau in der Pfalzlow-cost sensorsRheinland-Pfalz, Germany 130.2×
  8. 2297SwordsLeinster, Ireland 130.2×▼306
  9. 2297LongfordLeinster, Ireland 130.2×▼542
  10. 2297DublinLeinster, Ireland 130.2×▼580
  11. 2297BallinasloeConnacht, Ireland 130.2×▼953
  12. 2297Saint-Étienne-de-MontlucPays de la Loire, France 130.2×▼267
  13. 2297LourdesOccitanie, France 130.2×▼6
  14. 2297DongesPays de la Loire, France 130.2×▼232
  15. 2297KolárovoNitra Region, Slovakia 130.2×▼203
  16. 2297Veronalow-cost sensorsVeneto, Italy 130.2×
  17. 2297HortaAzores, Portugal 130.2×▼159
  18. 2297São SebastiãoSão Paulo, Brazil 130.2×▼1123
  19. 2297Neuquénlow-cost sensorsNeuquen, Argentina no daily values yet130.2×
  20. 2297PennsaukenNew Jersey, United States 130.2×▼528
  21. 2297BostonMassachusetts, United States 130.2×▼718
  22. 2297LondonderryNew Hampshire, United States 130.2×▼1204
  23. 2297ProvidenceRhode Island, United States 130.2×▼1276
  24. 2297ReddingCalifornia, United States 130.2×▼193
  25. 2297Coeur d'AleneIdaho, United States 130.2×▼330
  26. 2297West Valley CityUtah, United States 130.2×▼473
  27. 2297WenatcheeWashington, United States 130.2×▼93
  28. 2297RawlinsWyoming, United States 130.2×▲54
  29. 2297AnchorageAlaska, United States 130.2×▼187
  30. 2297FrederictonNew Brunswick, Canada 130.2×▼146
  31. 2297Port WallaceNova Scotia, Canada 130.2×▲33
  32. 2332Kyustendillow-cost sensorsKyustendil, Bulgaria 120.1×
  33. 2332FunchalMadeira, Portugal 120.1×▼712
  34. 2332NewportWales, United Kingdom 120.1×▼431
  35. 2332HorleyEngland, United Kingdom 120.1×▼587
  36. 2332Cheadle HulmeEngland, United Kingdom 120.1×▼805
  37. 2332JumetWallonia, Belgium 120.1×▲35
  38. 2332Schwedt (Oder)Brandenburg, Germany 120.1×▼497
  39. 2332Rottenburglow-cost sensorsBaden-Wurttemberg, Germany 120.1×
  40. 2332LimerickMunster, Ireland 120.1×▼304
  41. 2332VannesBrittany, France 120.1×▼247
  42. 2332FrostburgMaryland, United States 120.1×
  43. 2332HopewellVirginia, United States 120.1×▼411
  44. 2332DenverColorado, United States 120.1×▼749
  45. 2332BoulderColorado, United States 120.1×▼54
  46. 2332CorvallisOregon, United States 120.1×▼28
  47. 2332Salt Lake CityUtah, United States 120.1×▼107
  48. 2332EllensburgWashington, United States 120.1×▼53
  49. 2349BallaratVictoria, Australia 120.1×▼50
  50. 2349SouthamptonEngland, United Kingdom 120.1×▼450
  51. 2349SeafordEngland, United Kingdom 120.1×▼62
  52. 2349SligoConnacht, Ireland 120.1×▼715
  53. 2349KillarneyMunster, Ireland 120.1×▲38
  54. 2349LorientBrittany, France 120.1×▼260
  55. 2349BearDelaware, United States 120.1×▼210
  56. 2349CharlotteNorth Carolina, United States 120.1×▼208
  57. 2349SpringfieldVirginia, United States 120.1×▼528
  58. 2349GreenfieldMassachusetts, United States 120.1×▼801
  59. 2349LowellMassachusetts, United States 120.1×▼1268
  60. 2349North AdamsMassachusetts, United States 120.1×▼893
  61. 2349West FargoNorth Dakota, United States 120.1×▼1414
  62. 2349AllentownPennsylvania, United States 120.1×▼616
  63. 2349BensalemPennsylvania, United States 120.1×▼384
  64. 2349SchlusserPennsylvania, United States 120.1×▼703
  65. 2349Spanish ForkUtah, United States 120.1×▼31
  66. 2349WhistlerBritish Columbia, Canada 120.1×▲55
  67. 2367PoriSatakunta, Finland 110.1×▼12
  68. 2367KuopioNorth Savo, Finland 110.1×▼24
  69. 2367HedemoraDalarna, Sweden 110.1×▲18
  70. 2367MonsWallonia, Belgium 110.1×▼655
  71. 2367Rottweillow-cost sensorsBaden-Wurttemberg, Germany 110.1×
  72. 2367Nova GoricaUrban Municipality of Nova Gorica, Slovenia 110.1×▼231
  73. 2367TelfordEngland, United Kingdom 110.1×▼271
  74. 2367BaltimoreMaryland, United States 110.1×▼172
  75. 2367Kennett SquarePennsylvania, United States 110.1×▼171
  76. 2367PhiladelphiaPennsylvania, United States 110.1×▼518
  77. 2367QuincyMassachusetts, United States 110.1×▼1078
  78. 2367AberdeenSouth Dakota, United States 110.1×▼1318
  79. 2367MesquiteNevada, United States 110.1×▼145
  80. 2367Brigham CityUtah, United States 110.1×▼814
  81. 2367MagnaUtah, United States 110.1×▼673
  82. 2382JyväskyläCentral Finland, Finland 110.1×▼42
  83. 2382Kalamariálow-cost sensorsCentral Macedonia, Greece 110.1×
  84. 2382CorroiosSetúbal, Portugal 110.1×▼405
  85. 2382ReadingEngland, United Kingdom 110.1×▼441
  86. 2382FarnboroughEngland, United Kingdom 110.1×▼596
  87. 2382TrochtelfingenBaden-Wurttemberg, Germany 110.1×▼174
  88. 2382GreystonesLeinster, Ireland 110.1×▼320
  89. 2382Hradec KrálovéHradec Králové Region, Czechia 110.1×▼211
  90. 2382Vicenzalow-cost sensorsVeneto, Italy 110.1×
  91. 2382AthloneLeinster, Ireland 110.1×▼844
  92. 2382GlasgowDelaware, United States 110.1×▼210
  93. 2382NewarkDelaware, United States 110.1×▼242
  94. 2382Lawrencelow-cost sensorsKansas, United States 110.1×▼2135
  95. 2382BrocktonMassachusetts, United States 110.1×▼1612
  96. 2382LaconiaNew Hampshire, United States 110.1×▼342
  97. 2382AlamosaColorado, United States 110.1×▼733
  98. 2382HavreMontana, United States 110.1×
  99. 2382HerrimanUtah, United States 110.1×▼730
  100. 2382Moses LakeWashington, United States 110.1×▼53

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.

Download top 10 (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 2026-10-13 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).