SmogRank / History / September 11, 2024

Most polluted cities on September 11, 2024

1,710 cities ranked by their average PM2.5 over the day; the worst was Kampala, Uganda, at 128.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during September 11, 2024. All episodes.

← Kampala 128.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for September 11, 2024, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1Kampalalow-cost sensorsCentral Region, Uganda
    2038.5×
  2. 2Asunciónlow-cost sensorsAsuncion, Paraguay
    1927.6×
  3. 3Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    1846.8×
  4. 4Boulder CityNevada, United States
    1725.7×
  5. 5HendersonNevada, United States
    1624.8×
  6. 6MesquiteNevada, United States
    1604.6×
  7. 7West FargoNorth Dakota, United States
    1584.4×
  8. 8VillarricaAraucania, Chile
    1584.3×
  9. 9Lahorelow-cost sensorsPunjab, Pakistan
    1544.0×
  10. 10DushanbeDushanbe, Tajikistan
    1533.9×
  11. 11Santa Anita - Los FicusLima region, Peru
    1493.7×
  12. 12YanacanchaPasco, Peru
    1443.5×
  13. 13Puerto VarasLos Lagos Region, Chile
    1433.5×
  14. 14CairoCairo, Egypt
    1423.5×
  15. 15EnterpriseNevada, United States
    1423.5×
  16. 16Las VegasNevada, United States
    1403.4×
  17. 17HualpénBiobio, Chile
    1383.4×
  18. 18Karachilow-cost sensorsSindh, Pakistan
    1353.3×
  19. 19ValdiviaLos Ríos Region, Chile
    1343.2×
  20. 20BaghdadBaghdad, Iraq
    1323.2×
  21. 21Dhakalow-cost sensorsDhaka Division, Bangladesh
    1313.2×
  22. 22OsornoLos Lagos Region, Chile
    1283.1×
  23. 23AntananarivoAnalamanga, Madagascar
    1263.0×
  24. 24Spring ValleyNevada, United States
    1212.9×
  25. 25Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1202.9×
  26. 26KigaliKigali, Rwanda
    1192.9×
  27. 27Addis AbabaAddis Ababa, Ethiopia
    1182.8×
  28. 28TooeleUtah, United States
    1172.8×
  29. 29Puerto MonttLos Lagos Region, Chile
    1112.6×
  30. 30N'DjamenaN’Djaména, Chad
    1072.5×
  31. 31Islamabadlow-cost sensorsIslamabad, Pakistan
    1072.5×
  32. 31MillcreekUtah, United States
    1072.5×
  33. 33HerrimanUtah, United States
    1052.5×
  34. 34La UniónLos Ríos Region, Chile
    1052.5×
  35. 35BendOregon, United States
    1042.5×
  36. 36AberdeenSouth Dakota, United States
    1022.4×
  37. 37GuangzhouGuangdong, China
    1002.4×
  38. 38ButteMontana, United States
    992.3×
  39. 39Villa Poeta José Gálvez BarrenecheaLima region, Peru
    982.3×
  40. 39MagnaUtah, United States
    982.3×
  41. 39Summerlin SouthNevada, United States
    982.3×
  42. 42JakartaJakarta, Indonesia
    982.3×
  43. 43TemucoAraucania, Chile
    972.3×
  44. 43West JordanUtah, United States
    972.3×
  45. 45Prince AlbertSaskatchewan, Canada
    972.2×
  46. 46Salt Lake CityUtah, United States
    962.2×
  47. 47West Valley CityUtah, United States
    942.2×
  48. 48Şabāḩ as SālimMubārak al Kabīr, Kuwait
    942.1×
  49. 48Puerto AysénAysén, Chile
    942.1×
  50. 50NacimientoBiobio, Chile
    932.1×
  51. 50HurricaneUtah, United States
    932.1×
  52. 50San Francisco De BorjaLima region, Peru
    932.1×
  53. 53OremUtah, United States
    922.1×
  54. 54Twin FallsIdaho, United States
    912.0×
  55. 55HualquiBiobio, Chile
    912.0×
  56. 56ChiguayanteBiobio, Chile
    902.0×
  57. 57Spanish ForkUtah, United States
    902.0×
  58. 58Bang NaBangkok, Thailand
    892.0×
  59. 59BountifulUtah, United States
    881.9×
  60. 60YauriCuzco Department, Peru
    871.9×
  61. 61ZhubeiTaiwan, Taiwan
    871.9×
  62. 61JinchengFukien, Taiwan
    871.9×
  63. 63MissoulaMontana, United States
    861.9×
  64. 64HelenaMontana, United States
    861.8×
  65. 65North OgdenUtah, United States
    851.8×
  66. 66CallaoCallao, Peru
    851.8×
  67. 66Jacobo HunterArequipa, Peru
    851.8×
  68. 68ToméBiobio, Chile
    851.8×
  69. 69DelhiDelhi, India
    841.8×
  70. 70Wan ChaiWan Chai, Hong Kong
    841.8×
  71. 71CoyhaiqueAysén, Chile
    831.8×
  72. 72CoronelBiobio, Chile
    821.7×
  73. 73NeiliTaiwan, Taiwan
    811.7×
  74. 73ReginaSaskatchewan, Canada
    811.7×
  75. 75IncheonIncheon, South Korea
    811.7×
  76. 76BuziTaiwan, Taiwan
    801.7×
  77. 77KolkataWest Bengal, India
    801.7×
  78. 78HighlandUtah, United States
    801.6×
  79. 79San ClementeIca, Peru
    801.6×
  80. 80Columbialow-cost sensorsMissouri, United States
    801.6×
  81. 81HanamGyeonggi-do, South Korea
    791.6×
  82. 82Puente AltoSantiago Metropolitan, Chile
    791.6×
  83. 83SeonghwanChungcheongnam-do, South Korea
    781.6×
  84. 84Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    781.6×
  85. 85SeoulSeoul, South Korea
    781.6×
  86. 85New Taipei CityTaipei, Taiwan
    781.6×
  87. 87QuinteroValparaiso, Chile
    771.6×
  88. 88AntofagastaAntofagasta, Chile
    771.5×
  89. 89Gimpo-siGyeonggi-do, South Korea
    771.5×
  90. 90ConcepciónBiobio, Chile
    761.5×
  91. 91Ganghwa-gunIncheon, South Korea
    761.5×
  92. 91RengoO'Higgins Region, Chile
    761.5×
  93. 93CuricóMaule Region, Chile
    761.5×
  94. 94GwangmyeongGyeonggi-do, South Korea
    761.5×
  95. 95TaipeiTaiwan, Taiwan
    751.5×
  96. 95Icheon-siGyeonggi-do, South Korea
    751.5×
  97. 97ChennaiTamil Nadu, India
    751.5×
  98. 97RancaguaO'Higgins Region, Chile
    751.5×
  99. 97QuillotaValparaiso, Chile
    751.5×
  100. 97Swift CurrentSaskatchewan, Canada
    751.5×
  101. 97Khlong Sam WaBangkok, Thailand
    751.5×
  102. 102SantiagoSantiago Metropolitan, Chile
    741.4×
  103. 102HarrisburgPennsylvania, United States
    741.4×
  104. 104MagongTaiwan, Taiwan
    741.4×
  105. 105LewistonIdaho, United States
    741.4×
  106. 106NonsanChungcheongnam-do, South Korea
    741.4×
  107. 107HayangGyeongsangbuk-do, South Korea
    741.4×
  108. 107TaoyuanTaiwan, Taiwan
    741.4×
  109. 109YuanlinTaiwan, Taiwan
    731.4×
  110. 110SalorTashkent Region, Uzbekistan
    731.4×
  111. 110Abujalow-cost sensorsFCT, Nigeria
    731.4×
  112. 110TocopillaAntofagasta, Chile
    731.4×
  113. 113Goyang-siGyeonggi-do, South Korea
    731.4×
  114. 113TalcaMaule Region, Chile
    731.4×
  115. 115ToufenTaiwan, Taiwan
    731.4×
  116. 115Little RockArkansas, United States
    731.4×
  117. 117ChanghuaTaiwan, Taiwan
    721.4×
  118. 118ChillánÑuble, Chile
    721.4×
  119. 118SaskatoonSaskatchewan, Canada
    721.4×
  120. 120DaxiTaiwan, Taiwan
    721.4×
  121. 120Bucheon-siGyeonggi-do, South Korea
    721.4×
  122. 122BuanJeollabuk-do, South Korea
    721.3×
  123. 122TalcahuanoBiobio, Chile
    721.3×
  124. 122NampaIdaho, United States
    721.3×
  125. 125MiaoliTaiwan, Taiwan
    711.3×
  126. 125VictorvilleCalifornia, United States
    711.3×
  127. 127PyeongtaekGyeonggi-do, South Korea
    711.3×
  128. 127Hwaseong-siGyeonggi-do, South Korea
    711.3×
  129. 127La SerenaCoquimbo Region, Chile
    711.3×
  130. 130AsanChungcheongnam-do, South Korea
    711.3×
  131. 131GunsanJeollabuk-do, South Korea
    711.3×
  132. 132CheonanChungcheongnam-do, South Korea
    711.3×
  133. 133XizhiTaipei, Taiwan
    701.3×
  134. 133Guri-siGyeonggi-do, South Korea
    701.3×
  135. 133KimjeJeollabuk-do, South Korea
    701.3×
  136. 136TaichungTaiwan, Taiwan
    701.3×
  137. 137TangjinChungcheongnam-do, South Korea
    701.3×
  138. 137SuwonGyeonggi-do, South Korea
    701.3×
  139. 137PohangGyeongsangbuk-do, South Korea
    701.3×
  140. 137SheridanWyoming, United States
    701.3×
  141. 141Tuen MunTuen Mun, Hong Kong
    701.3×
  142. 141CuranilahueBiobio, Chile
    701.3×
  143. 143XinyingTaiwan, Taiwan
    701.3×
  144. 143SanzhiTaipei, Taiwan
    701.3×
  145. 143CauquenesMaule Region, Chile
    701.3×
  146. 143BartlettTennessee, United States
    701.3×
  147. 147Nong KhaemBangkok, Thailand
    691.3×
  148. 147MonterreyNuevo León, Mexico
    691.3×
  149. 147Medicine HatAlberta, Canada
    691.3×
  150. 147Khan Na YaoBangkok, Thailand
    691.3×
  151. 151HsinchuTaiwan, Taiwan
    691.3×
  152. 151Seongnam-siGyeonggi-do, South Korea
    691.3×
  153. 151OlatheKansas, United States
    691.3×
  154. 154JarosławSubcarpathia, Poland
    691.3×
  155. 154ShulinTaipei, Taiwan
    691.3×
  156. 154ConcónValparaiso, Chile
    691.3×
  157. 157PuliTaiwan, Taiwan
    691.2×
  158. 157FanlingNorth District, Hong Kong
    691.2×
  159. 159NamyangjuGyeonggi-do, South Korea
    691.2×
  160. 159Los ÁngelesBiobio, Chile
    691.2×
  161. 161ErlinTaiwan, Taiwan
    681.2×
  162. 161GwangjuGyeonggi-do, South Korea
    681.2×
  163. 161Anyang-siGyeonggi-do, South Korea
    681.2×
  164. 161Ansan-siGyeonggi-do, South Korea
    681.2×
  165. 165MaputoMaputo City, Mozambique
    681.2×
  166. 165Chinch'ŏnNorth Chungcheong, South Korea
    681.2×
  167. 167Bang Bo DistrictSamut Prakan, Thailand
    681.2×
  168. 167AricaArica y Parinacota Region, Chile
    681.2×
  169. 169ErlunTaiwan, Taiwan
    681.2×
  170. 169YesanChungcheongnam-do, South Korea
    681.2×
  171. 169HwadoGyeonggi-do, South Korea
    681.2×
  172. 172BeijingBeijing, China
    671.2×
  173. 172IksanJeollabuk-do, South Korea
    671.2×
  174. 172HernandoMississippi, United States
    671.2×
  175. 175WŏnjuGangwon-do, South Korea
    671.2×
  176. 175TalaganteSantiago Metropolitan, Chile
    671.2×
  177. 175MeridianIdaho, United States
    671.2×
  178. 178NiskoSubcarpathia, Poland
    671.2×
  179. 178OsanGyeonggi-do, South Korea
    671.2×
  180. 180Tai PoTai Po, Hong Kong
    661.2×
  181. 180Sydneylow-cost sensorsNew South Wales, Australia
    661.2×
  182. 182Samut SakhonSamut Sakhon, Thailand
    661.1×
  183. 182Khlong LuangPathum Thani, Thailand
    661.1×
  184. 184Tin Shui WaiYuen Long, Hong Kong
    661.1×
  185. 184BuyeoChungcheongnam-do, South Korea
    661.1×
  186. 184GongjuChungcheongnam-do, South Korea
    661.1×
  187. 184HwawŏnDaegu, South Korea
    661.1×
  188. 188Donghae CityGangwon-do, South Korea
    661.1×
  189. 188AlgiersAlgiers, Algeria
    661.1×
  190. 188CalamaAntofagasta, Chile
    661.1×
  191. 191Mong KokYau Tsim Mong District, Hong Kong
    661.1×
  192. 191Kansas CityKansas, United States
    661.1×
  193. 193Ban Khlong PrawetBangkok, Thailand
    651.1×
  194. 193IndioCalifornia, United States
    651.1×
  195. 193SejongSejong-si, South Korea
    651.1×
  196. 196Phra PradaengSamut Prakan, Thailand
    651.1×
  197. 196OregonOhio, United States
    651.1×
  198. 198TulsaOklahoma, United States
    651.1×
  199. 198MoscowIdaho, United States
    651.1×
  200. 198Great FallsMontana, United States
    651.1×

Top 200 of 1,710 shown.

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 no terms that let us reuse their readings. Most cities there are missing from this board, not clean. Why.

Use this board

SmogRank, most polluted cities, PM2.5, September 11, 2024, smogrank.com/history/2024-09-11 (accessed 3 Oct 2026).

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