SmogRank / History / September 27, 2023

Most polluted cities on September 27, 2023

1,834 cities ranked by their average PM2.5 over the day; the worst was Karachi, Pakistan, at 99.5 µg/m³. Each city's own local calendar day.

Bad-air episodes during September 27, 2023. All episodes.

← Karachi 99.5 µg/m³ 90 µg/m³15 WHO 24-hour guideline
Every city ranked for September 27, 2023, 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. 1Karachilow-cost sensorsSindh, Pakistan
    1826.6×
  2. 2Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1695.4×
  3. 3Dhakalow-cost sensorsDhaka Division, Bangladesh
    1624.7×
  4. 4Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1584.3×
  5. 5Lahorelow-cost sensorsPunjab, Pakistan
    1574.3×
  6. 6BeijingBeijing, China
    1383.4×
  7. 7BakuBaki, Azerbaijan
    1353.3×
  8. 8St. John'sNewfoundland and Labrador, Canada
    1263.0×
  9. 9ShenyangLiaoning, China
    1233.0×
  10. 10CairoCairo, Egypt
    1222.9×
  11. 11Addis AbabaAddis Ababa, Ethiopia
    1212.9×
  12. 12DelhiDelhi, India
    1192.9×
  13. 13HyderabadTelangana, India
    1142.7×
  14. 14Mount PearlNewfoundland and Labrador, Canada
    1142.7×
  15. 15BamakoBamako, Mali
    1052.5×
  16. 16Islamabadlow-cost sensorsIslamabad, Pakistan
    1042.4×
  17. 17JakartaJakarta, Indonesia
    1022.4×
  18. 18NacimientoBiobio, Chile
    982.3×
  19. 19HualquiBiobio, Chile
    982.3×
  20. 20Kampalalow-cost sensorsCentral Region, Uganda
    962.2×
  21. 20ManamaManama, Bahrain
    962.2×
  22. 20AnconaThe Marches, Italy
    962.2×
  23. 20TlaquepaqueJalisco, Mexico
    962.2×
  24. 24DushanbeDushanbe, Tajikistan
    952.2×
  25. 25TemucoAraucania, Chile
    942.2×
  26. 26Puerto AysénAysén, Chile
    942.1×
  27. 27La UniónLos Ríos Region, Chile
    922.1×
  28. 28JeddahMecca Region, Saudi Arabia
    902.0×
  29. 29OlsztynWarmia-Masuria, Poland
    892.0×
  30. 30TijuanaBaja California, Mexico
    892.0×
  31. 31GuangzhouGuangdong, China
    881.9×
  32. 32DębicaSubcarpathia, Poland
    871.9×
  33. 33PruszkówMazovia, Poland
    861.9×
  34. 34Puerto MonttLos Lagos Region, Chile
    841.8×
  35. 35KrakówLesser Poland, Poland
    841.8×
  36. 36MexicaliBaja California, Mexico
    841.8×
  37. 37KolkataWest Bengal, India
    831.8×
  38. 38Villa Poeta José Gálvez BarrenecheaLima region, Peru
    831.7×
  39. 39BydgoszczKujawsko-Pomorskie, Poland
    821.7×
  40. 40OsornoLos Lagos Region, Chile
    821.7×
  41. 41SzczecinWest Pomerania, Poland
    821.7×
  42. 42KutnoŁódź Voivodeship, Poland
    811.7×
  43. 43XonacatlánMéxico, Mexico
    811.7×
  44. 44TarnówLesser Poland, Poland
    811.7×
  45. 45SalorTashkent Region, Uzbekistan
    801.7×
  46. 46SarajevoFederation of B&H, Bosnia and Herzegovina
    801.6×
  47. 46CoyhaiqueAysén, Chile
    801.6×
  48. 46CallaoCallao, Peru
    801.6×
  49. 49SantiagoSantiago Metropolitan, Chile
    801.6×
  50. 50NairobiNairobi County, Kenya
    801.6×
  51. 51GdańskPomerania, Poland
    791.6×
  52. 52CuranilahueBiobio, Chile
    791.6×
  53. 53HanoiHanoi, Vietnam
    791.6×
  54. 53GdyniaPomerania, Poland
    791.6×
  55. 55CoronelBiobio, Chile
    781.6×
  56. 56LublinLublin, Poland
    781.6×
  57. 56ToruńKujawsko-Pomorskie, Poland
    781.6×
  58. 56LimaLima Province, Peru
    781.6×
  59. 59KaliszGreater Poland, Poland
    781.6×
  60. 59Little RockArkansas, United States
    781.6×
  61. 61PristinaPristina, Kosovo
    781.6×
  62. 61PłockMazovia, Poland
    781.6×
  63. 61ToméBiobio, Chile
    781.6×
  64. 64BogotáBogota D.C., Colombia
    771.6×
  65. 65ŻyrardówMazovia, Poland
    771.5×
  66. 66CauquenesMaule Region, Chile
    771.5×
  67. 67ZamośćLublin, Poland
    771.5×
  68. 67ElblągWarmia-Masuria, Poland
    771.5×
  69. 67Puerto VarasLos Lagos Region, Chile
    771.5×
  70. 70ŚwinoujścieWest Pomerania, Poland
    761.5×
  71. 70LęborkPomerania, Poland
    761.5×
  72. 70Puente AltoSantiago Metropolitan, Chile
    761.5×
  73. 73Corner BrookNewfoundland and Labrador, Canada
    761.5×
  74. 74MumbaiMaharashtra, India
    761.5×
  75. 75Ang Mo Kio New TownSingapore
    751.5×
  76. 75São PauloSão Paulo, Brazil
    751.5×
  77. 77KętrzynWarmia-Masuria, Poland
    751.5×
  78. 77San Francisco TlalcilalcalpanMéxico, Mexico
    751.5×
  79. 79LegionowoMazovia, Poland
    751.5×
  80. 79OstravaMoravian-Silesian Region, Czechia
    751.5×
  81. 79KościerzynaPomerania, Poland
    751.5×
  82. 79QuillotaValparaiso, Chile
    751.5×
  83. 79San Salvador TizatlalliMéxico, Mexico
    751.5×
  84. 79Santa Anita - Los FicusLima region, Peru
    751.5×
  85. 85PoznańGreater Poland, Poland
    751.5×
  86. 85Jastrzębie ZdrójSilesia, Poland
    751.5×
  87. 85ChiguayanteBiobio, Chile
    751.5×
  88. 88WarsawMazovia, Poland
    741.4×
  89. 88TalaganteSantiago Metropolitan, Chile
    741.4×
  90. 90GuadalajaraJalisco, Mexico
    741.4×
  91. 91BirminghamAlabama, United States
    741.4×
  92. 92ŁaskŁódź Voivodeship, Poland
    731.4×
  93. 92San Francisco De BorjaLima region, Peru
    731.4×
  94. 94StarachowiceŚwiętokrzyskie, Poland
    731.4×
  95. 94CholulaPuebla, Mexico
    731.4×
  96. 94AntofagastaAntofagasta, Chile
    731.4×
  97. 97QuinteroValparaiso, Chile
    731.4×
  98. 98Ulu BedokSingapore
    731.4×
  99. 98KatowiceSilesia, Poland
    731.4×
  100. 98Gorzów WielkopolskiLubusz, Poland
    731.4×
  101. 98TolucaMéxico, Mexico
    731.4×
  102. 102TocopillaAntofagasta, Chile
    731.4×
  103. 103ConcónValparaiso, Chile
    721.4×
  104. 103Santa CatarinaNuevo León, Mexico
    721.4×
  105. 105RadomMazovia, Poland
    721.4×
  106. 105RancaguaO'Higgins Region, Chile
    721.4×
  107. 107NiskoSubcarpathia, Poland
    721.4×
  108. 107KielceŚwiętokrzyskie, Poland
    721.4×
  109. 107Hradec KrálovéHradec Králové Region, Czechia
    721.4×
  110. 110Wan ChaiWan Chai, Hong Kong
    721.4×
  111. 110PardubicePardubice Region, Czechia
    721.4×
  112. 110NaplesCampania, Italy
    721.4×
  113. 110San CarlosÑuble, Chile
    721.4×
  114. 110La SerenaCoquimbo Region, Chile
    721.4×
  115. 110CopiapóAtacama, Chile
    721.4×
  116. 116CoquimboCoquimbo Region, Chile
    721.3×
  117. 117ŁukówLublin, Poland
    711.3×
  118. 118MielecSubcarpathia, Poland
    711.3×
  119. 118WłocławekKujawsko-Pomorskie, Poland
    711.3×
  120. 118ŁódźŁódź Voivodeship, Poland
    711.3×
  121. 121SiedlceMazovia, Poland
    711.3×
  122. 121KladnoCentral Bohemia, Czechia
    711.3×
  123. 121TalcahuanoBiobio, Chile
    711.3×
  124. 124DěčínÚstí nad Labem Region, Czechia
    711.3×
  125. 124RadomskoŁódź Voivodeship, Poland
    711.3×
  126. 124CuricóMaule Region, Chile
    711.3×
  127. 127N'DjamenaN’Djaména, Chad
    701.3×
  128. 127RacibórzSilesia, Poland
    701.3×
  129. 127KościanGreater Poland, Poland
    701.3×
  130. 127ConcepciónBiobio, Chile
    701.3×
  131. 131MiskolcBorsod-Abaúj-Zemplén, Hungary
    701.3×
  132. 132FujinomiyaShizuoka, Japan
    701.3×
  133. 133MiędzyrzeczLubusz, Poland
    701.3×
  134. 133Banja LukaSrpska, Bosnia and Herzegovina
    701.3×
  135. 135AntananarivoAnalamanga, Madagascar
    701.3×
  136. 135TrnavaTrnava Region, Slovakia
    701.3×
  137. 135PřerovOlomouc Region, Czechia
    701.3×
  138. 135OlomoucOlomouc Region, Czechia
    701.3×
  139. 139GrazStyria, Austria
    691.3×
  140. 139AricaArica y Parinacota Region, Chile
    691.3×
  141. 141FontanaCalifornia, United States
    691.3×
  142. 142AstanaAstana, Kazakhstan
    691.3×
  143. 142GothenburgVästra Götaland, Sweden
    691.3×
  144. 142Falconara MarittimaThe Marches, Italy
    691.3×
  145. 145UstkaPomerania, Poland
    691.2×
  146. 145KrapkowiceOpole Voivodeship, Poland
    691.2×
  147. 145NipomoCalifornia, United States
    691.2×
  148. 148PułtuskMazovia, Poland
    691.2×
  149. 148Český TěšínMoravian-Silesian Region, Czechia
    691.2×
  150. 150FujiedaShizuoka, Japan
    691.2×
  151. 150RengoO'Higgins Region, Chile
    691.2×
  152. 150ZapopanJalisco, Mexico
    691.2×
  153. 153WawerMazovia, Poland
    681.2×
  154. 154GyőrGyőr-Moson-Sopron, Hungary
    681.2×
  155. 155KadaňÚstí nad Labem Region, Czechia
    681.2×
  156. 156BurghausenBavaria, Germany
    681.2×
  157. 156ZnojmoSouth Moravian, Czechia
    681.2×
  158. 158EłkWarmia-Masuria, Poland
    671.2×
  159. 158YatomiAichi, Japan
    671.2×
  160. 160MalmöSkåne, Sweden
    671.2×
  161. 160NitraNitra Region, Slovakia
    671.2×
  162. 160YamanashiYamanashi, Japan
    671.2×
  163. 163TeltowBrandenburg, Germany
    671.2×
  164. 163BerlinState of Berlin, Germany
    671.2×
  165. 165ŚwiecieKujawsko-Pomorskie, Poland
    671.2×
  166. 166ChillánÑuble, Chile
    661.2×
  167. 166Ciudad ApodacaNuevo León, Mexico
    661.2×
  168. 168BangkokBangkok, Thailand
    661.2×
  169. 168SenicaTrnava Region, Slovakia
    661.2×
  170. 168ValdiviaLos Ríos Region, Chile
    661.2×
  171. 171BiałystokPodlasie, Poland
    661.1×
  172. 172BitolaBitola, North Macedonia
    661.1×
  173. 172SanoTochigi, Japan
    661.1×
  174. 172PueblaPuebla, Mexico
    661.1×
  175. 172HueytownAlabama, United States
    661.1×
  176. 176TakasakiGunma, Japan
    661.1×
  177. 176NogalesSonora, Mexico
    661.1×
  178. 176HernandoMississippi, United States
    661.1×
  179. 179Kathmandulow-cost sensorsBagmati Province, Nepal
    661.1×
  180. 179Nong KhaemBangkok, Thailand
    661.1×
  181. 179NurembergBavaria, Germany
    661.1×
  182. 179TepliceÚstí nad Labem Region, Czechia
    661.1×
  183. 179RiversideCalifornia, United States
    661.1×
  184. 184AugustówPodlasie, Poland
    651.1×
  185. 184KiryūGunma, Japan
    651.1×
  186. 184Queenstown Estatelow-cost sensorsSingapore
    651.1×
  187. 184MartinŽilina Region, Slovakia
    651.1×
  188. 188WrocławLower Silesia, Poland
    651.1×
  189. 189PrešovPrešov Region, Slovakia
    651.1×
  190. 189OtwockMazovia, Poland
    651.1×
  191. 189PassauBavaria, Germany
    651.1×
  192. 192KazoSaitama, Japan
    651.1×
  193. 192DallasTexas, United States
    651.1×
  194. 194Samut SakhonSamut Sakhon, Thailand
    651.1×
  195. 194Civitanova MarcheThe Marches, Italy
    651.1×
  196. 194Arroyo GrandeCalifornia, United States
    651.1×
  197. 197Bernau bei BerlinBrandenburg, Germany
    641.1×
  198. 197PraguePrague, Czechia
    641.1×
  199. 197LiberecLiberec Region, Czechia
    641.1×
  200. 197CalamaAntofagasta, Chile
    641.1×

Top 200 of 1,834 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

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SmogRank, most polluted cities, PM2.5, September 27, 2023, smogrank.com/history/2023-09-27 (accessed 2 Oct 2026).

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