SmogRank / Rankings

All 2,660 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. 101Sakon NakhonSakon Nakhon, Thailand 801.6×▲181
  2. 101DouliuTaiwan, Taiwan 801.6×▲23
  3. 103Anyang-siGyeonggi-do, South Korea 801.6×▲142
  4. 104eMbalenhleMpumalanga, South Africa 801.6×▲215
  5. 104Santiaguito TlalcilalcalliMéxico, Mexico 801.6×▲127
  6. 106BeigangTaiwan, Taiwan 801.6×▲56
  7. 107OsanGyeonggi-do, South Korea 791.6×▲82
  8. 107JeongeupJeollabuk-do, South Korea 791.6×▼70
  9. 109Burundaylow-cost sensorsAlmaty Region, Kazakhstan 791.6×▼104
  10. 109Nakhon RatchasimaNakhon Ratchasima, Thailand 791.6×▲212
  11. 111SuwonGyeonggi-do, South Korea 791.6×▲130
  12. 112ZhongliaoTaiwan, Taiwan 791.6×▲162
  13. 113Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa 781.6×▼60
  14. 113Nong Bua LamphuNong Bua Lamphu, Thailand 781.6×▲337
  15. 113ZhushanTaiwan, Taiwan 781.6×▲21
  16. 113KimjeJeollabuk-do, South Korea 781.6×▼70
  17. 113ChanghuaTaiwan, Taiwan 781.6×▲112
  18. 118Mong KokYau Tsim Mong District, Hong Kong 781.6×▲62
  19. 119Tin Shui WaiYuen Long, Hong Kong 781.6×▲45
  20. 119SeosanChungcheongnam-do, South Korea 781.6×▼23
  21. 121Leipziglow-cost sensorsSaxony, Germany 781.6×
  22. 122Taesal-liChungcheongnam-do, South Korea 771.6×▼4
  23. 122TalcahuanoBiobio, Chile 771.6×▲92
  24. 124ModimolleLimpopo, South Africa 771.5×▲213
  25. 125CoyhaiqueAysén, Chile 771.5×▼67
  26. 126Tuen MunTuen Mun, Hong Kong 771.5×
  27. 126Lagoslow-cost sensorsLagos, Nigeria 771.5×▲92
  28. 128Ban ChangRayong, Thailand 771.5×▼29
  29. 128CheorwonGangwon-do, South Korea 771.5×▲95
  30. 128Lak SiBangkok, Thailand 771.5×▲219
  31. 131Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand 761.5×▲152
  32. 131LuguTaiwan, Taiwan 761.5×▲176
  33. 131AsanChungcheongnam-do, South Korea 761.5×▼47
  34. 131Icheon-siGyeonggi-do, South Korea 761.5×▲128
  35. 135HualpénBiobio, Chile 761.5×▲9
  36. 136MalamuleleLimpopo, South Africa 761.5×
  37. 137GiyaniLimpopo, South Africa 761.5×
  38. 138SecundaMpumalanga, South Africa 761.5×▲297
  39. 138RancaguaO'Higgins Region, Chile 761.5×▼33
  40. 140Uijeongbu-siGyeonggi-do, South Korea 751.5×▲114
  41. 140Regensburglow-cost sensorsBavaria, Germany 751.5×
  42. 142ChaiyaphumChaiyaphum, Thailand 751.5×▲493
  43. 143PuliTaiwan, Taiwan 751.5×▲179
  44. 143HongseongChungcheongnam-do, South Korea 751.5×▼75
  45. 145Sham Shui PoSham Shui Po District, Hong Kong 751.5×▲20
  46. 146TzaneenLimpopo, South Africa 741.4×▲1367
  47. 146Naucalpan de JuárezMéxico, Mexico 741.4×▼57
  48. 146QuinteroValparaiso, Chile 741.4×▼14
  49. 149NewcastleKwaZulu-Natal, South Africa 741.4×
  50. 149KathmanduBagmati Province, Nepal 741.4×▼22
  51. 151HanamGyeonggi-do, South Korea 741.4×▲158
  52. 152Beirutlow-cost sensorsBeirut, Lebanon 741.4×▼72
  53. 152HwadoGyeonggi-do, South Korea 741.4×▲151
  54. 154BharatpurBagmati Province, Nepal 731.4×▲103
  55. 155NamsaJeollabuk-do, South Korea 731.4×▼74
  56. 155IksanJeollabuk-do, South Korea 731.4×▼117
  57. 157Yerevanlow-cost sensorsYerevan, Armenia 731.4×▲81
  58. 157XinyingTaiwan, Taiwan 731.4×▼31
  59. 157Chiayi CityTaiwan, Taiwan 731.4×▲12
  60. 157ValdiviaLos Ríos Region, Chile 731.4×▼53
  61. 161Ban Samae DamBangkok, Thailand 731.4×▲137
  62. 161JinchengFukien, Taiwan 731.4×▼24
  63. 161San Tung Chung HangIslands, Hong Kong 731.4×▲49
  64. 164ShenzhenTaiwan, Taiwan 731.4×▲202
  65. 164NeiliTaiwan, Taiwan 731.4×▲273
  66. 164FanlingNorth District, Hong Kong 731.4×▲52
  67. 164GunsanJeollabuk-do, South Korea 731.4×▼123
  68. 164Chinch'ŏnNorth Chungcheong, South Korea 731.4×▼10
  69. 164SantiagoSantiago Metropolitan, Chile 731.4×▼82
  70. 170Kwai ChungKwai Tsing District, Hong Kong 721.4×▲70
  71. 170BuanJeollabuk-do, South Korea 721.4×▼128
  72. 170Ashaimanlow-cost sensorsGreater Accra, Ghana 721.4×▲60
  73. 170Puerto AysénAysén, Chile 721.4×▼48
  74. 170HualquiBiobio, Chile 721.4×▼37
  75. 170Lat KrabangBangkok, Thailand 721.4×▲111
  76. 176JizzaxJizzakh Region, Uzbekistan 721.4×▼115
  77. 176XizhiTaipei, Taiwan 721.4×▲288
  78. 176TaoyuanTaiwan, Taiwan 721.4×▲392
  79. 179TaibaoTaiwan, Taiwan 721.4×▲6
  80. 179San CarlosÑuble, Chile 721.4×▼40
  81. 181MiaoliTaiwan, Taiwan 721.3×▲238
  82. 181Tai PoTai Po, Hong Kong 721.3×▲67
  83. 181Sau Mau PingKwun Tong District, Hong Kong 721.3×▲40
  84. 184YeonggwangJeollanam-do, South Korea 711.3×▼148
  85. 185DushanbeDushanbe, Tajikistan 711.3×▼94
  86. 185Tsuen WanTsuen Wan, Hong Kong 711.3×▲77
  87. 185Hacienda Santa FeJalisco, Mexico 711.3×▲93
  88. 188YasothonYasothon, Thailand 711.3×▲618
  89. 188TainanTaiwan, Taiwan 711.3×▼67
  90. 188NantouTaiwan, Taiwan 711.3×▲47
  91. 188KamaqhekezaMpumalanga, South Africa 711.3×▼126
  92. 192VictoriaCentral and Western, Hong Kong 711.3×▲74
  93. 192Atotonilco de TulaHidalgo, Mexico 711.3×▲6
  94. 194Cheongju-siNorth Chungcheong, South Korea 711.3×▼16
  95. 195SmederevoCentral Serbia, Serbia 701.3×▲91
  96. 195Khlong LuangPathum Thani, Thailand 701.3×▲63
  97. 195Koch'angJeollabuk-do, South Korea 701.3×▼117
  98. 198JeonjuJeollabuk-do, South Korea 701.3×▼84
  99. 199AmandelbultLimpopo, South Africa 701.3×▲89
  100. 199Nong KhaemBangkok, Thailand 701.3×▲98

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, 00:00 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, #4 Gaur, Madhesh, #5 Dhaka, #6 Dubai, #7 Vientiane, #8 Faisalabad, #9 Gujranwala and #10 Multan. 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 00:07 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).