SmogRank / History / October 2023

Most polluted cities, October 2023

1,686 cities ranked by their average PM2.5 over the 31 days; the worst was Peshawar, Pakistan, at 159.4 µg/m³. A city needs measurements on 70% of the days to be ranked.

  1. 1Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    159.4
  2. 2N'DjamenaN’Djaména, Chad
    132.6
  3. 3Lahorelow-cost sensorsPunjab, Pakistan
    121.4
  4. 4DelhiDelhi, India
    91.3
  5. 5Dhakalow-cost sensorsDhaka Division, Bangladesh
    79.5
  6. 6KolkataWest Bengal, India
    70.6
  7. 7HyderabadTelangana, India
    60.6
  8. 8CairoCairo, Egypt
    52.7
  9. 9MumbaiMaharashtra, India
    52.2
  10. 10JakartaJakarta, Indonesia
    49.8
  11. 11HanoiHanoi, Vietnam
    46.0
  12. 12Islamabadlow-cost sensorsIslamabad, Pakistan
    45.8
  13. 12BeijingBeijing, China
    45.8
  14. 14DushanbeDushanbe, Tajikistan
    42.2
  15. 15ManamaManama, Bahrain
    39.7
  16. 16Karachilow-cost sensorsSindh, Pakistan
    38.8
  17. 17Şabāḩ as SālimMubārak al Kabīr, Kuwait
    38.3
  18. 18AntananarivoAnalamanga, Madagascar
    37.0
  19. 19ShenyangLiaoning, China
    36.7
  20. 20Abujalow-cost sensorsFCT, Nigeria
    34.1
  21. 21SalorTashkent Region, Uzbekistan
    34.0
  22. 22PristinaPristina, Kosovo
    32.9
  23. 23AshgabatAshgabat, Turkmenistan
    32.0
  24. 24Kampalalow-cost sensorsCentral Region, Uganda
    30.3
  25. 25GuangzhouGuangdong, China
    29.7
  26. 26SarajevoFederation of B&H, Bosnia and Herzegovina
    29.1
  27. 27Kathmandulow-cost sensorsBagmati Province, Nepal
    26.0
  28. 27Bangkoklow-cost sensorsBangkok, Thailand
    26.0
  29. 29Ulu BedokSingapore
    25.0
  30. 30JeddahMecca Region, Saudi Arabia
    24.6
  31. 31Ang Mo Kio New TownSingapore
    24.5
  32. 32TetovoTetovo, North Macedonia
    23.7
  33. 33Tha BoNong Khai, Thailand
    22.7
  34. 34Addis AbabaAddis Ababa, Ethiopia
    21.0
  35. 35Queenstown Estatelow-cost sensorsSingapore
    19.8
  36. 36SalamancaGuanajuato, Mexico
    19.6
  37. 37BakuBaki, Azerbaijan
    19.2
  38. 37AlessandriaPiedmont, Italy
    19.2
  39. 39Kuala Lumpurlow-cost sensorsKuala Lumpur, Malaysia
    19.1
  40. 40AthensAttica, Greece
    18.4
  41. 41ŻabbarĦaż-Żabbar, Malta
    18.3
  42. 42AstanaAstana, Kazakhstan
    17.8
  43. 43AsprópyrgosAttica, Greece
    17.7
  44. 43SliemaTas-Sliema, Malta
    17.7
  45. 45TijuanaBaja California, Mexico
    17.6
  46. 46NairobiNairobi County, Kenya
    17.5
  47. 47SkopjeGrad Skopje, North Macedonia
    17.1
  48. 48ColomboWestern Province, Sri Lanka
    16.8
  49. 49NišCentral Serbia, Serbia
    16.7
  50. 50Almatylow-cost sensorsAlmaty, Kazakhstan
    16.5
  51. 51AlgiersAlgiers, Algeria
    16.4
  52. 51Banja LukaSrpska, Bosnia and Herzegovina
    16.4
  53. 53NaplesCampania, Italy
    16.2
  54. 54ThessaloníkiCentral Macedonia, Greece
    15.9
  55. 55RuseRuse, Bulgaria
    15.7
  56. 55Quezon Citylow-cost sensorsNational Capital Region, Philippines
    15.7
  57. 57BelgradeCentral Serbia, Serbia
    15.6
  58. 58DěčínÚstí nad Labem Region, Czechia
    15.5
  59. 58BirminghamAlabama, United States
    15.5
  60. 60KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    15.1
  61. 61BitolaBitola, North Macedonia
    15.0
  62. 61IlindenIlinden, North Macedonia
    15.0
  63. 61Falconara MarittimaThe Marches, Italy
    15.0
  64. 61CelayaGuanajuato, Mexico
    15.0
  65. 65PátraWest Greece, Greece
    14.8
  66. 65Asunciónlow-cost sensorsAsuncion, Paraguay
    14.8
  67. 67San RoqueAndalusia, Spain
    14.5
  68. 68Granadilla de AbonaCanary Islands, Spain
    14.4
  69. 68TrentoTrentino-Alto Adige, Italy
    14.4
  70. 70Chiang Mailow-cost sensorsChiang Mai, Thailand
    14.1
  71. 70WoodlandsSingapore
    14.1
  72. 70HernandoMississippi, United States
    14.1
  73. 73La Línea de la ConcepciónAndalusia, Spain
    14.0
  74. 73ChikugoFukuoka, Japan
    14.0
  75. 75AcharnésAttica, Greece
    13.9
  76. 75KavadarciKavadarci, North Macedonia
    13.9
  77. 75MostaIl-Mosta, Malta
    13.9
  78. 78HanfordCalifornia, United States
    13.8
  79. 79BerounCentral Bohemia, Czechia
    13.6
  80. 79TurinPiedmont, Italy
    13.6
  81. 79RoveretoTrentino-Alto Adige, Italy
    13.6
  82. 79FresnoCalifornia, United States
    13.6
  83. 83NagaiYamagata, Japan
    13.5
  84. 84KhalándrionAttica, Greece
    13.4
  85. 84Cluj-NapocaCluj County, Romania
    13.4
  86. 86Las Palmas de Gran CanariaCanary Islands, Spain
    13.3
  87. 86AnaheimCalifornia, United States
    13.3
  88. 88BucharestBucharest, Romania
    13.1
  89. 88La OrotavaCanary Islands, Spain
    13.1
  90. 90PiraeusAttica, Greece
    13.0
  91. 90VelesVeles, North Macedonia
    13.0
  92. 90OlomoucOlomouc Region, Czechia
    13.0
  93. 90BohumínMoravian-Silesian Region, Czechia
    13.0
  94. 90VigoGalicia, Spain
    13.0
  95. 95MiyakonojōMiyazaki, Japan
    12.9
  96. 95Santa Cruz de TenerifeCanary Islands, Spain
    12.9
  97. 95BolzanoTrentino-Alto Adige, Italy
    12.9
  98. 95ComptonCalifornia, United States
    12.9
  99. 99Civitanova MarcheThe Marches, Italy
    12.8
  100. 100OstravaMoravian-Silesian Region, Czechia
    12.7
  101. 100Hradec KrálovéHradec Králové Region, Czechia
    12.7
  102. 100Mollet del VallèsCatalonia, Spain
    12.7
  103. 103MurciaMurcia, Spain
    12.6
  104. 103HuelvaAndalusia, Spain
    12.6
  105. 103GrazStyria, Austria
    12.6
  106. 103BakersfieldCalifornia, United States
    12.6
  107. 103CalexicoCalifornia, United States
    12.6
  108. 108Tanushimarumachi-toyokiFukuoka, Japan
    12.5
  109. 109KošiceKošice Region, Slovakia
    12.4
  110. 109CosladaMadrid, Spain
    12.4
  111. 109BeneventoCampania, Italy
    12.4
  112. 112SalernoCampania, Italy
    12.3
  113. 112Novi SadVojvodina, Serbia
    12.3
  114. 114HumennéPrešov Region, Slovakia
    12.2
  115. 114HonmachiKumamoto, Japan
    12.2
  116. 114KasaokaOkayama, Japan
    12.2
  117. 114Jurong WestSingapore
    12.2
  118. 114CuencaCastille-La Mancha, Spain
    12.2
  119. 114BizenOkayama, Japan
    12.2
  120. 120MontemurloTuscany, Italy
    12.1
  121. 120FontanaCalifornia, United States
    12.1
  122. 122SzegedCsongrád, Hungary
    12.0
  123. 122IyoEhime, Japan
    12.0
  124. 122AnconaThe Marches, Italy
    12.0
  125. 122YachiyoChiba, Japan
    12.0
  126. 126TamanaKumamoto, Japan
    11.8
  127. 126TrnavaTrnava Region, Slovakia
    11.8
  128. 126JesiThe Marches, Italy
    11.8
  129. 126TurlockCalifornia, United States
    11.8
  130. 126VisaliaCalifornia, United States
    11.8
  131. 131PrešovPrešov Region, Slovakia
    11.7
  132. 131San IsidroCanary Islands, Spain
    11.7
  133. 131Sainte-Geneviève-des-BoisÎle-de-France, France
    11.7
  134. 131MostÚstí nad Labem Region, Czechia
    11.7
  135. 135UtoKumamoto, Japan
    11.6
  136. 135CapannoriTuscany, Italy
    11.6
  137. 135CorcoranCalifornia, United States
    11.6
  138. 135Los AngelesCalifornia, United States
    11.6
  139. 139Uekimachi-mōnoKumamoto, Japan
    11.5
  140. 139TsurusakiOita, Japan
    11.5
  141. 139Ústí nad LabemÚstí nad Labem Region, Czechia
    11.5
  142. 139OpavaMoravian-Silesian Region, Czechia
    11.5
  143. 139Little RockArkansas, United States
    11.5
  144. 139BartlettTennessee, United States
    11.5
  145. 139BensalemPennsylvania, United States
    11.5
  146. 139MaderaCalifornia, United States
    11.5
  147. 147Maebaru-chūōFukuoka, Japan
    11.4
  148. 147KumamotoKumamoto, Japan
    11.4
  149. 147TraunUpper Austria, Austria
    11.4
  150. 147LleidaCatalonia, Spain
    11.4
  151. 147BogotáBogota D.C., Colombia
    11.4
  152. 147Jurupa ValleyCalifornia, United States
    11.4
  153. 147KirishimaKagoshima, Japan
    11.4
  154. 154ŌmutaFukuoka, Japan
    11.3
  155. 154KazoSaitama, Japan
    11.3
  156. 154Kan’onjichōKagawa, Japan
    11.3
  157. 154AnsfeldenUpper Austria, Austria
    11.3
  158. 154MartinŽilina Region, Slovakia
    11.3
  159. 154Baton RougeLouisiana, United States
    11.3
  160. 154KogaFukuoka, Japan
    11.3
  161. 161SendaiKagoshima, Japan
    11.2
  162. 161ŌzuKumamoto, Japan
    11.2
  163. 161IzegemFlanders, Belgium
    11.2
  164. 161ZnojmoSouth Moravian, Czechia
    11.2
  165. 161TepliceÚstí nad Labem Region, Czechia
    11.2
  166. 161ValdemoroMadrid, Spain
    11.2
  167. 161FlorenceTuscany, Italy
    11.2
  168. 168CartagenaMurcia, Spain
    11.1
  169. 168ArrecifeCanary Islands, Spain
    11.1
  170. 168PřerovOlomouc Region, Czechia
    11.1
  171. 168KadaňÚstí nad Labem Region, Czechia
    11.1
  172. 168HavířovMoravian-Silesian Region, Czechia
    11.1
  173. 168ManlleuCatalonia, Spain
    11.1
  174. 168BarcelonaCatalonia, Spain
    11.1
  175. 168Silao de la VictoriaGuanajuato, Mexico
    11.1
  176. 168HattiesburgMississippi, United States
    11.1
  177. 177TakanabeMiyazaki, Japan
    11.0
  178. 177KurashikiOkayama, Japan
    11.0
  179. 177KagoshimaKagoshima, Japan
    11.0
  180. 177LinzUpper Austria, Austria
    11.0
  181. 177LitvínovÚstí nad Labem Region, Czechia
    11.0
  182. 177PratoTuscany, Italy
    11.0
  183. 177León de los AldamaGuanajuato, Mexico
    11.0
  184. 184CandelariaCanary Islands, Spain
    10.9
  185. 184Mladá BoleslavCentral Bohemia, Czechia
    10.9
  186. 184La SpeziaLiguria, Italy
    10.9
  187. 184Granite CityIllinois, United States
    10.9
  188. 184JacksonMississippi, United States
    10.9
  189. 184AraoKumamoto, Japan
    10.9
  190. 190Spišská Nová VesKošice Region, Slovakia
    10.8
  191. 190NakatsuOita, Japan
    10.8
  192. 190MinamataKumamoto, Japan
    10.8
  193. 190SevillaAndalusia, Spain
    10.8
  194. 190DunaújvárosFejér, Hungary
    10.8
  195. 190PraguePrague, Czechia
    10.8
  196. 190Český TěšínMoravian-Silesian Region, Czechia
    10.8
  197. 190ModestoCalifornia, United States
    10.8
  198. 198YawataKyoto, Japan
    10.7
  199. 198NiihamaEhime, Japan
    10.7
  200. 198Nara-shiNara, Japan
    10.7

Top 200 of 1,686 shown.

Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

By country

Austria 17Belgium 28Bulgaria 7Canada 97China 3Czechia 29Finland 9France 108Germany 46Greece 8Hungary 6India 4Ireland 3Italy 25Japan 499Malta 3Martinique 3Mexico 10North Macedonia 7Pakistan 4Portugal 6Reunion 3Romania 4Serbia 3Singapore 5Slovakia 22Spain 79Sweden 7Switzerland 5Thailand 3United Kingdom 5United States 590

Ranked cities in each country, October 2023.

Use this board

SmogRank, most polluted cities, PM2.5, October 2023, smogrank.com/history/2023-10 (accessed 2 Oct 2026).

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