SmogRank / History / September 30, 2023

Most polluted cities on September 30, 2023

1,841 cities ranked by their average PM2.5 over the day; the worst was Manama, Bahrain, at 68.5 µg/m³. Each city's own local calendar day.

Bad-air episodes during September 30, 2023. All episodes.

← Manama 68.5 µg/m³ 60 µg/m³15 WHO 24-hour guideline
Every city ranked for September 30, 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. 1ManamaManama, Bahrain
    1604.6×
  2. 2JakartaJakarta, Indonesia
    1564.2×
  3. 3Karachilow-cost sensorsSindh, Pakistan
    1544.0×
  4. 4DelhiDelhi, India
    1513.7×
  5. 5Kampalalow-cost sensorsCentral Region, Uganda
    1453.6×
  6. 6HanoiHanoi, Vietnam
    1433.5×
  7. 7Lahorelow-cost sensorsPunjab, Pakistan
    1383.4×
  8. 8CoyhaiqueAysén, Chile
    1313.2×
  9. 9CairoCairo, Egypt
    1293.1×
  10. 10NacimientoBiobio, Chile
    1263.0×
  11. 11OsornoLos Lagos Region, Chile
    1212.9×
  12. 12Puerto VarasLos Lagos Region, Chile
    1202.9×
  13. 13CuranilahueBiobio, Chile
    1172.8×
  14. 14TlaquepaqueJalisco, Mexico
    1162.8×
  15. 15Dhakalow-cost sensorsDhaka Division, Bangladesh
    1112.6×
  16. 16EdmundstonNew Brunswick, Canada
    1102.6×
  17. 17Fort McMurrayAlberta, Canada
    1082.6×
  18. 18TemucoAraucania, Chile
    1072.5×
  19. 19La UniónLos Ríos Region, Chile
    1052.5×
  20. 20SantiagoSantiago Metropolitan, Chile
    1042.5×
  21. 21TalaganteSantiago Metropolitan, Chile
    1032.4×
  22. 21GreenfieldMassachusetts, United States
    1032.4×
  23. 23JeddahMecca Region, Saudi Arabia
    1002.4×
  24. 23CoronelBiobio, Chile
    1002.4×
  25. 25Ang Mo Kio New TownSingapore
    992.3×
  26. 26BrawleyCalifornia, United States
    982.3×
  27. 27Ulu BedokSingapore
    982.3×
  28. 28KeeneNew Hampshire, United States
    972.3×
  29. 29SpringfieldMassachusetts, United States
    962.2×
  30. 30Puerto MonttLos Lagos Region, Chile
    962.2×
  31. 31GranbyQuebec, Canada
    962.2×
  32. 32HartfordConnecticut, United States
    952.2×
  33. 33Şabāḩ as SālimMubārak al Kabīr, Kuwait
    952.2×
  34. 34San Francisco TlalcilalcalpanMéxico, Mexico
    932.1×
  35. 35Addis AbabaAddis Ababa, Ethiopia
    932.1×
  36. 35CuricóMaule Region, Chile
    932.1×
  37. 37North ChicopeeMassachusetts, United States
    932.1×
  38. 38AlessandriaPiedmont, Italy
    922.1×
  39. 38San Salvador TizatlalliMéxico, Mexico
    922.1×
  40. 40Queenstown Estatelow-cost sensorsSingapore
    912.1×
  41. 41Puente AltoSantiago Metropolitan, Chile
    912.0×
  42. 42Islamabadlow-cost sensorsIslamabad, Pakistan
    912.0×
  43. 42TolucaMéxico, Mexico
    912.0×
  44. 44QuillotaValparaiso, Chile
    902.0×
  45. 45SherbrookeQuebec, Canada
    902.0×
  46. 46LaconiaNew Hampshire, United States
    892.0×
  47. 46RutlandVermont, United States
    892.0×
  48. 48HualquiBiobio, Chile
    892.0×
  49. 49RancaguaO'Higgins Region, Chile
    881.9×
  50. 50Kathmandulow-cost sensorsBagmati Province, Nepal
    881.9×
  51. 51MexicaliBaja California, Mexico
    881.9×
  52. 51NantanKyoto, Japan
    881.9×
  53. 53ChillánÑuble, Chile
    881.9×
  54. 54WaterburyConnecticut, United States
    871.9×
  55. 55YumaArizona, United States
    871.9×
  56. 56XonacatlánMéxico, Mexico
    871.9×
  57. 57DrummondvilleQuebec, Canada
    861.9×
  58. 58Puerto AysénAysén, Chile
    861.9×
  59. 59PristinaPristina, Kosovo
    861.9×
  60. 60CornwallOntario, Canada
    851.8×
  61. 61DushanbeDushanbe, Tajikistan
    851.8×
  62. 62EdmontonAlberta, Canada
    851.8×
  63. 63SarajevoFederation of B&H, Bosnia and Herzegovina
    841.8×
  64. 63BrossardQuebec, Canada
    841.8×
  65. 65Grande PrairieAlberta, Canada
    841.8×
  66. 66MumbaiMaharashtra, India
    831.7×
  67. 66L'Ancienne-LoretteQuebec, Canada
    831.7×
  68. 68Lexingtonlow-cost sensorsMassachusetts, United States
    821.7×
  69. 69Rivière-des-Prairies–Pointe-aux-TremblesQuebec, Canada
    821.7×
  70. 70Falconara MarittimaThe Marches, Italy
    821.7×
  71. 71TalcahuanoBiobio, Chile
    811.7×
  72. 72QuilpuéValparaiso, Chile
    801.7×
  73. 73MontréalQuebec, Canada
    801.7×
  74. 74KolkataWest Bengal, India
    801.6×
  75. 74GuadalajaraJalisco, Mexico
    801.6×
  76. 76San CarlosÑuble, Chile
    801.6×
  77. 76RengoO'Higgins Region, Chile
    801.6×
  78. 78QuébecQuebec, Canada
    801.6×
  79. 79TarnówLesser Poland, Poland
    791.6×
  80. 79ToméBiobio, Chile
    791.6×
  81. 81ConcónValparaiso, Chile
    791.6×
  82. 82Wan ChaiWan Chai, Hong Kong
    791.6×
  83. 82KrakówLesser Poland, Poland
    791.6×
  84. 84New LondonConnecticut, United States
    791.6×
  85. 84Saint-Jean-sur-RichelieuQuebec, Canada
    791.6×
  86. 86NaplesCampania, Italy
    791.6×
  87. 86BrocktonMassachusetts, United States
    791.6×
  88. 88Kuala LumpurKuala Lumpur, Malaysia
    781.6×
  89. 89RuseRuse, Bulgaria
    781.6×
  90. 89IyoEhime, Japan
    781.6×
  91. 91AntofagastaAntofagasta, Chile
    781.6×
  92. 91AugustaMaine, United States
    781.6×
  93. 93ŁukówLublin, Poland
    781.6×
  94. 93DębicaSubcarpathia, Poland
    781.6×
  95. 93Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    781.6×
  96. 96PittsfieldMassachusetts, United States
    771.5×
  97. 97Quezon Citylow-cost sensorsNational Capital Region, Philippines
    771.5×
  98. 97GuangzhouGuangdong, China
    771.5×
  99. 97QuinteroValparaiso, Chile
    771.5×
  100. 97Fall RiverMassachusetts, United States
    771.5×
  101. 97BurlingtonVermont, United States
    771.5×
  102. 102Little RockArkansas, United States
    761.5×
  103. 102SaguenayQuebec, Canada
    761.5×
  104. 104SofiaSofia-Capital, Bulgaria
    761.5×
  105. 104Prince GeorgeBritish Columbia, Canada
    761.5×
  106. 106AstanaAstana, Kazakhstan
    761.5×
  107. 106ConcepciónBiobio, Chile
    761.5×
  108. 108NiskoSubcarpathia, Poland
    751.5×
  109. 108CuernavacaMorelos, Mexico
    751.5×
  110. 108Viña del MarValparaiso, Chile
    751.5×
  111. 108TalcaMaule Region, Chile
    751.5×
  112. 108LotaBiobio, Chile
    751.5×
  113. 113CopiapóAtacama, Chile
    751.5×
  114. 114LublinLublin, Poland
    751.5×
  115. 114TocopillaAntofagasta, Chile
    751.5×
  116. 114St. John'sNewfoundland and Labrador, Canada
    751.5×
  117. 117San Miguel de AllendeGuanajuato, Mexico
    751.5×
  118. 118QuincyMassachusetts, United States
    741.4×
  119. 119KielceŚwiętokrzyskie, Poland
    741.4×
  120. 119CoventryRhode Island, United States
    741.4×
  121. 119ProvidenceRhode Island, United States
    741.4×
  122. 122BelgradeCentral Serbia, Serbia
    731.4×
  123. 123BirminghamAlabama, United States
    731.4×
  124. 124KasaokaOkayama, Japan
    731.4×
  125. 124Banja LukaSrpska, Bosnia and Herzegovina
    731.4×
  126. 124ZapopanJalisco, Mexico
    731.4×
  127. 127ValdiviaLos Ríos Region, Chile
    731.4×
  128. 127ChiguayanteBiobio, Chile
    731.4×
  129. 127DerryNew Hampshire, United States
    731.4×
  130. 127DorvalQuebec, Canada
    731.4×
  131. 131AntananarivoAnalamanga, Madagascar
    731.4×
  132. 132CoquimboCoquimbo Region, Chile
    721.4×
  133. 132Red DeerAlberta, Canada
    721.4×
  134. 134La SerenaCoquimbo Region, Chile
    721.4×
  135. 134CauquenesMaule Region, Chile
    721.4×
  136. 136Saint JohnNew Brunswick, Canada
    721.3×
  137. 137San Pedro de la PazBiobio, Chile
    711.3×
  138. 138BamakoBamako, Mali
    711.3×
  139. 139TakanabeMiyazaki, Japan
    711.3×
  140. 140NiihamaEhime, Japan
    711.3×
  141. 140LewistonMaine, United States
    711.3×
  142. 142LowellMassachusetts, United States
    701.3×
  143. 143La SpeziaLiguria, Italy
    701.3×
  144. 144PisaTuscany, Italy
    701.3×
  145. 144CholulaPuebla, Mexico
    701.3×
  146. 146BakuBaki, Azerbaijan
    701.3×
  147. 146SliemaTas-Sliema, Malta
    701.3×
  148. 146PueblaPuebla, Mexico
    701.3×
  149. 146HernandoMississippi, United States
    701.3×
  150. 150SalorTashkent Region, Uzbekistan
    691.3×
  151. 150CalgaryAlberta, Canada
    691.3×
  152. 152ŻabbarĦaż-Żabbar, Malta
    691.3×
  153. 152OlomoucOlomouc Region, Czechia
    691.3×
  154. 152TurinPiedmont, Italy
    691.3×
  155. 152Ciudad JuárezChihuahua, Mexico
    691.3×
  156. 156Kan’onjichōKagawa, Japan
    691.2×
  157. 156Jastrzębie ZdrójSilesia, Poland
    691.2×
  158. 158NagaiYamagata, Japan
    691.2×
  159. 158Tepeji del Río de OcampoHidalgo, Mexico
    691.2×
  160. 160Samut SakhonSamut Sakhon, Thailand
    691.2×
  161. 160N'DjamenaN’Djaména, Chad
    691.2×
  162. 160PřerovOlomouc Region, Czechia
    691.2×
  163. 160BostonMassachusetts, United States
    691.2×
  164. 160BridgeportConnecticut, United States
    691.2×
  165. 165Trois-RivièresQuebec, Canada
    681.2×
  166. 166ShinagawaEhime, Japan
    681.2×
  167. 167TsurusakiOita, Japan
    681.2×
  168. 168DunaújvárosFejér, Hungary
    681.2×
  169. 168Český TěšínMoravian-Silesian Region, Czechia
    681.2×
  170. 168SalamancaGuanajuato, Mexico
    681.2×
  171. 171TetovoTetovo, North Macedonia
    681.2×
  172. 171BitolaBitola, North Macedonia
    681.2×
  173. 171NobeokaMiyazaki, Japan
    681.2×
  174. 171Tula de AllendeHidalgo, Mexico
    681.2×
  175. 171ShintomiMiyazaki, Japan
    681.2×
  176. 176IkedachōTokushima, Japan
    671.2×
  177. 176WoodlandsSingapore
    671.2×
  178. 176Civitanova MarcheThe Marches, Italy
    671.2×
  179. 179AlbanyNew York, United States
    671.2×
  180. 179St. AlbertAlberta, Canada
    671.2×
  181. 181MiyazakiMiyazaki, Japan
    671.2×
  182. 181WolfsbergCarinthia, Austria
    671.2×
  183. 181GrazStyria, Austria
    671.2×
  184. 184São PauloSão Paulo, Brazil
    671.2×
  185. 184SaltilloCoahuila, Mexico
    671.2×
  186. 186Klagenfurt am WörtherseeCarinthia, Austria
    671.2×
  187. 187NyíregyházaSzabolcs-Szatmár-Bereg, Hungary
    661.2×
  188. 187ZamośćLublin, Poland
    661.2×
  189. 187CapannoriTuscany, Italy
    661.2×
  190. 190MiskolcBorsod-Abaúj-Zemplén, Hungary
    661.2×
  191. 190BartlettTennessee, United States
    661.2×
  192. 192Tanushimarumachi-toyokiFukuoka, Japan
    661.1×
  193. 192ŌitaOita, Japan
    661.1×
  194. 192PortlandMaine, United States
    661.1×
  195. 195SzegedCsongrád, Hungary
    661.1×
  196. 195ZentsujichóKagawa, Japan
    661.1×
  197. 195TamanoOkayama, Japan
    661.1×
  198. 195CalamaAntofagasta, Chile
    661.1×
  199. 199JarosławSubcarpathia, Poland
    661.1×
  200. 199Tuen MunTuen Mun, Hong Kong
    661.1×

Top 200 of 1,841 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 30, 2023, smogrank.com/history/2023-09-30 (accessed 2 Oct 2026).

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