SmogRank / History / October 18, 2023

Most polluted cities on October 18, 2023

1,721 cities ranked by their average PM2.5 over the day; the worst was Dhaka, Bangladesh, at 148.0 µg/m³. Each city's own local calendar day.

← Dhaka 148.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for October 18, 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. 1Dhakalow-cost sensorsDhaka Division, Bangladesh
    2239.9×
  2. 2N'DjamenaN’Djaména, Chad
    1867.0×
  3. 3KolkataWest Bengal, India
    1796.4×
  4. 4HanoiHanoi, Vietnam
    1735.8×
  5. 5MumbaiMaharashtra, India
    1624.7×
  6. 6HyderabadTelangana, India
    1564.1×
  7. 7CairoCairo, Egypt
    1554.1×
  8. 8SalorTashkent Region, Uzbekistan
    1554.1×
  9. 9JakartaJakarta, Indonesia
    1523.8×
  10. 10SarajevoFederation of B&H, Bosnia and Herzegovina
    1503.7×
  11. 11Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1443.5×
  12. 12DelhiDelhi, India
    1403.4×
  13. 13Banja LukaSrpska, Bosnia and Herzegovina
    1323.2×
  14. 14DushanbeDushanbe, Tajikistan
    1313.2×
  15. 15Lahorelow-cost sensorsPunjab, Pakistan
    1303.1×
  16. 16Tha BoNong Khai, Thailand
    1182.8×
  17. 16CoyhaiqueAysén, Chile
    1182.8×
  18. 18Nong KhaemBangkok, Thailand
    1182.8×
  19. 19Karachilow-cost sensorsSindh, Pakistan
    1172.8×
  20. 20Khlong LuangPathum Thani, Thailand
    1142.7×
  21. 21BangkokBangkok, Thailand
    1082.5×
  22. 22Mueang NonthaburiNonthaburi, Thailand
    1062.5×
  23. 23Islamabadlow-cost sensorsIslamabad, Pakistan
    1032.4×
  24. 24Phra PradaengSamut Prakan, Thailand
    1002.4×
  25. 25HualpénBiobio, Chile
    982.3×
  26. 26PristinaPristina, Kosovo
    982.3×
  27. 27BelgradeCentral Serbia, Serbia
    982.3×
  28. 28GuangzhouGuangdong, China
    962.2×
  29. 29Kuala LumpurKuala Lumpur, Malaysia
    962.2×
  30. 30ManamaManama, Bahrain
    952.2×
  31. 30BohumínMoravian-Silesian Region, Czechia
    952.2×
  32. 32Nakhon PathomNakhon Pathom, Thailand
    932.1×
  33. 33Samut PrakanSamut Prakan, Thailand
    932.1×
  34. 34OsornoLos Lagos Region, Chile
    922.1×
  35. 35NišCentral Serbia, Serbia
    912.0×
  36. 36Los ÁngelesBiobio, Chile
    902.0×
  37. 37Novi SadVojvodina, Serbia
    902.0×
  38. 38AntananarivoAnalamanga, Madagascar
    881.9×
  39. 39NacimientoBiobio, Chile
    861.9×
  40. 40Bang Bo DistrictSamut Prakan, Thailand
    861.8×
  41. 41Puerto VarasLos Lagos Region, Chile
    841.8×
  42. 42Kathmandulow-cost sensorsBagmati Province, Nepal
    831.8×
  43. 43CuranilahueBiobio, Chile
    821.7×
  44. 44ShenyangLiaoning, China
    821.7×
  45. 45AstanaAstana, Kazakhstan
    821.7×
  46. 46Abujalow-cost sensorsFCT, Nigeria
    811.7×
  47. 47San CarlosÑuble, Chile
    811.7×
  48. 48Carsonlow-cost sensorsCalifornia, United States
    801.6×
  49. 49KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    791.6×
  50. 49TetovoTetovo, North Macedonia
    791.6×
  51. 49Puerto AysénAysén, Chile
    791.6×
  52. 52Haskovolow-cost sensorsHaskovo, Bulgaria
    791.6×
  53. 52HanfordCalifornia, United States
    791.6×
  54. 54DěčínÚstí nad Labem Region, Czechia
    771.6×
  55. 54SantiagoSantiago Metropolitan, Chile
    771.6×
  56. 56CoronelBiobio, Chile
    771.5×
  57. 57Český TěšínMoravian-Silesian Region, Czechia
    771.5×
  58. 58Torrancelow-cost sensorsCalifornia, United States
    771.5×
  59. 59QuillotaValparaiso, Chile
    771.5×
  60. 60WeidenBavaria, Germany
    771.5×
  61. 60AntofagastaAntofagasta, Chile
    771.5×
  62. 62Tanushimarumachi-toyokiFukuoka, Japan
    761.5×
  63. 62TamanaKumamoto, Japan
    761.5×
  64. 62GrazStyria, Austria
    761.5×
  65. 65AricaArica y Parinacota Region, Chile
    761.5×
  66. 65Hawthornelow-cost sensorsCalifornia, United States
    761.5×
  67. 65Lomitalow-cost sensorsCalifornia, United States
    761.5×
  68. 68QuinteroValparaiso, Chile
    751.5×
  69. 69ChillánÑuble, Chile
    751.5×
  70. 70Ang Mo Kio New TownSingapore
    751.5×
  71. 70FontanaCalifornia, United States
    751.5×
  72. 72Little RockArkansas, United States
    751.5×
  73. 73Addis AbabaAddis Ababa, Ethiopia
    751.5×
  74. 74OstravaMoravian-Silesian Region, Czechia
    741.4×
  75. 74AnaheimCalifornia, United States
    741.4×
  76. 76Almatylow-cost sensorsAlmaty, Kazakhstan
    741.4×
  77. 77TalcahuanoBiobio, Chile
    741.4×
  78. 78RancaguaO'Higgins Region, Chile
    741.4×
  79. 79Puente AltoSantiago Metropolitan, Chile
    741.4×
  80. 80San Pedro de la PazBiobio, Chile
    741.4×
  81. 81HonmachiKumamoto, Japan
    731.4×
  82. 82TemucoAraucania, Chile
    731.4×
  83. 83KladnoCentral Bohemia, Czechia
    731.4×
  84. 83TalaganteSantiago Metropolitan, Chile
    731.4×
  85. 85Uekimachi-mōnoKumamoto, Japan
    721.4×
  86. 85Ulu BedokSingapore
    721.4×
  87. 85HualquiBiobio, Chile
    721.4×
  88. 85CauquenesMaule Region, Chile
    721.4×
  89. 89KurumeFukuoka, Japan
    721.4×
  90. 89BernBern, Switzerland
    721.4×
  91. 89Jurupa ValleyCalifornia, United States
    721.4×
  92. 92BerounCentral Bohemia, Czechia
    721.4×
  93. 92ConcepciónBiobio, Chile
    721.4×
  94. 94ŌzuKumamoto, Japan
    711.3×
  95. 94Puerto MonttLos Lagos Region, Chile
    711.3×
  96. 96ColomboWestern Province, Sri Lanka
    711.3×
  97. 96UtoKumamoto, Japan
    711.3×
  98. 96SliemaTas-Sliema, Malta
    711.3×
  99. 96AlessandriaPiedmont, Italy
    711.3×
  100. 100JacksonMississippi, United States
    711.3×
  101. 100CorcoranCalifornia, United States
    711.3×
  102. 102Şabāḩ as SālimMubārak al Kabīr, Kuwait
    711.3×
  103. 102IaşiIași County, Romania
    711.3×
  104. 102ChiguayanteBiobio, Chile
    711.3×
  105. 105AnnemasseAuvergne-Rhône-Alpes, France
    711.3×
  106. 105Viña del MarValparaiso, Chile
    711.3×
  107. 105ToméBiobio, Chile
    711.3×
  108. 105SulphurLouisiana, United States
    711.3×
  109. 105ComptonCalifornia, United States
    711.3×
  110. 110AlgiersAlgiers, Algeria
    701.3×
  111. 110CopiapóAtacama, Chile
    701.3×
  112. 110GulfportMississippi, United States
    701.3×
  113. 113MifuneKumamoto, Japan
    701.3×
  114. 113IyoEhime, Japan
    701.3×
  115. 115KumamotoKumamoto, Japan
    701.3×
  116. 115PassauBavaria, Germany
    701.3×
  117. 115KadaňÚstí nad Labem Region, Czechia
    701.3×
  118. 115SalamancaGuanajuato, Mexico
    701.3×
  119. 119Kanzakimachi-kanzakiSaga, Japan
    701.3×
  120. 120TsurusakiOita, Japan
    691.3×
  121. 121UmeåVästerbotten, Sweden
    691.3×
  122. 121TraunUpper Austria, Austria
    691.3×
  123. 121České BudějoviceSouth Bohemian Region, Czechia
    691.3×
  124. 121CuricóMaule Region, Chile
    691.3×
  125. 121CelayaGuanajuato, Mexico
    691.3×
  126. 121Los AngelesCalifornia, United States
    691.3×
  127. 127YamagaKumamoto, Japan
    691.3×
  128. 127FresnoCalifornia, United States
    691.3×
  129. 129LotaBiobio, Chile
    691.2×
  130. 130AraoKumamoto, Japan
    691.2×
  131. 131SkopjeGrad Skopje, North Macedonia
    691.2×
  132. 131AnsfeldenUpper Austria, Austria
    691.2×
  133. 133NakatsuOita, Japan
    681.2×
  134. 133MiyakonojōMiyazaki, Japan
    681.2×
  135. 133MinamataKumamoto, Japan
    681.2×
  136. 133ConcónValparaiso, Chile
    681.2×
  137. 133Alto HospicioTarapacá, Chile
    681.2×
  138. 133BirminghamAlabama, United States
    681.2×
  139. 139KasaokaOkayama, Japan
    681.2×
  140. 139CoquimboCoquimbo Region, Chile
    681.2×
  141. 139León de los AldamaGuanajuato, Mexico
    681.2×
  142. 142Inglewoodlow-cost sensorsCalifornia, United States
    681.2×
  143. 143Neu-UlmBavaria, Germany
    681.2×
  144. 144HumennéPrešov Region, Slovakia
    681.2×
  145. 144Asunciónlow-cost sensorsAsuncion, Paraguay
    681.2×
  146. 146MulhouseGrand Est, France
    671.2×
  147. 147Long BeachCalifornia, United States
    671.2×
  148. 147VisaliaCalifornia, United States
    671.2×
  149. 147UkihaFukuoka, Japan
    671.2×
  150. 150Cluj-NapocaCluj County, Romania
    671.2×
  151. 150VelesVeles, North Macedonia
    671.2×
  152. 150WolfsbergCarinthia, Austria
    671.2×
  153. 150QuilpuéValparaiso, Chile
    671.2×
  154. 154GyálPest County, Hungary
    671.2×
  155. 154HavířovMoravian-Silesian Region, Czechia
    671.2×
  156. 154RiversideCalifornia, United States
    671.2×
  157. 157HitoyoshiKumamoto, Japan
    671.2×
  158. 158ŌmutaFukuoka, Japan
    661.2×
  159. 158Kempten (Allgäu)Bavaria, Germany
    661.2×
  160. 160ValdiviaLos Ríos Region, Chile
    661.2×
  161. 160TijuanaBaja California, Mexico
    661.2×
  162. 160KotōKumamoto, Japan
    661.2×
  163. 163ŌitaOita, Japan
    661.1×
  164. 163ŻabbarĦaż-Żabbar, Malta
    661.1×
  165. 163MostÚstí nad Labem Region, Czechia
    661.1×
  166. 163Hradec KrálovéHradec Králové Region, Czechia
    661.1×
  167. 163TocopillaAntofagasta, Chile
    661.1×
  168. 168PřerovOlomouc Region, Czechia
    661.1×
  169. 168RengoO'Higgins Region, Chile
    661.1×
  170. 168San DiegoCalifornia, United States
    661.1×
  171. 168HigashigōSaga, Japan
    661.1×
  172. 172BaselBasel-City, Switzerland
    661.1×
  173. 172OlomoucOlomouc Region, Czechia
    661.1×
  174. 174TalcaMaule Region, Chile
    661.1×
  175. 174CalamaAntofagasta, Chile
    661.1×
  176. 174Santa Monicalow-cost sensorsCalifornia, United States
    661.1×
  177. 177HitaOita, Japan
    651.1×
  178. 177La SerenaCoquimbo Region, Chile
    651.1×
  179. 179Quezon Citylow-cost sensorsNational Capital Region, Philippines
    651.1×
  180. 179IzumiKagoshima, Japan
    651.1×
  181. 179BakersfieldCalifornia, United States
    651.1×
  182. 179MaderaCalifornia, United States
    651.1×
  183. 183Kampalalow-cost sensorsCentral Region, Uganda
    651.1×
  184. 183TosuSaga, Japan
    651.1×
  185. 185MarktredwitzBavaria, Germany
    651.1×
  186. 185MartinŽilina Region, Slovakia
    651.1×
  187. 185HattiesburgMississippi, United States
    651.1×
  188. 185OgōriFukuoka, Japan
    651.1×
  189. 189Kan’onjichōKagawa, Japan
    651.1×
  190. 189Queenstown Estatelow-cost sensorsSingapore
    651.1×
  191. 189AmstettenLower Austria, Austria
    651.1×
  192. 192NagaiYamagata, Japan
    641.1×
  193. 192TřinecMoravian-Silesian Region, Czechia
    641.1×
  194. 192KirishimaKagoshima, Japan
    641.1×
  195. 192YameFukuoka, Japan
    641.1×
  196. 196WelsUpper Austria, Austria
    641.1×
  197. 196PécsBaranya, Hungary
    641.1×
  198. 198PascagoulaMississippi, United States
    641.1×
  199. 198TerraceBritish Columbia, Canada
    641.1×
  200. 198ShūnanYamaguchi, Japan
    641.1×

Top 200 of 1,721 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

Use this board

SmogRank, most polluted cities, PM2.5, October 18, 2023, smogrank.com/history/2023-10-18 (accessed 2 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.