SmogRank / History / October 28, 2023

Most polluted cities on October 28, 2023

1,866 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 292.0 µg/m³. Each city's own local calendar day.

← N'Djamena 292.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for October 28, 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. 1N'DjamenaN’Djaména, Chad
    43319.5×
  2. 2Lahorelow-cost sensorsPunjab, Pakistan
    33216.1×
  3. 3DelhiDelhi, India
    2119.1×
  4. 4Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1867.1×
  5. 5KolkataWest Bengal, India
    1856.9×
  6. 6Dhakalow-cost sensorsDhaka Division, Bangladesh
    1735.8×
  7. 7BeijingBeijing, China
    1705.5×
  8. 8ShenyangLiaoning, China
    1695.4×
  9. 9CairoCairo, Egypt
    1634.8×
  10. 10MumbaiMaharashtra, India
    1574.3×
  11. 11Islamabadlow-cost sensorsIslamabad, Pakistan
    1564.2×
  12. 12JakartaJakarta, Indonesia
    1544.0×
  13. 13HyderabadTelangana, India
    1503.7×
  14. 14Karachilow-cost sensorsSindh, Pakistan
    1333.2×
  15. 15Ulan BatorUlaanbaatar, Mongolia
    1102.6×
  16. 16HanoiHanoi, Vietnam
    1092.6×
  17. 17GuangzhouGuangdong, China
    1072.5×
  18. 18Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1002.3×
  19. 19ManamaManama, Bahrain
    992.3×
  20. 20KigaliKigali, Rwanda
    982.3×
  21. 21BadgerAlaska, United States
    962.2×
  22. 22Abujalow-cost sensorsFCT, Nigeria
    962.2×
  23. 23DushanbeDushanbe, Tajikistan
    962.2×
  24. 24BakuBaki, Azerbaijan
    952.2×
  25. 25Almatylow-cost sensorsAlmaty, Kazakhstan
    851.8×
  26. 26Wan ChaiWan Chai, Hong Kong
    831.8×
  27. 27HualpénBiobio, Chile
    821.7×
  28. 28CranbrookBritish Columbia, Canada
    821.7×
  29. 29ColomboWestern Province, Sri Lanka
    811.7×
  30. 30Santa Anita - Los FicusLima region, Peru
    811.7×
  31. 31Port AlberniBritish Columbia, Canada
    801.6×
  32. 32AshgabatAshgabat, Turkmenistan
    791.6×
  33. 33PristinaPristina, Kosovo
    791.6×
  34. 34QuillotaValparaiso, Chile
    781.6×
  35. 35SarajevoFederation of B&H, Bosnia and Herzegovina
    761.5×
  36. 36CoronelBiobio, Chile
    751.5×
  37. 37TocopillaAntofagasta, Chile
    751.5×
  38. 37TijuanaBaja California, Mexico
    751.5×
  39. 39Fort St. JohnBritish Columbia, Canada
    741.4×
  40. 40Mong KokYau Tsim Mong District, Hong Kong
    741.4×
  41. 40QuinteroValparaiso, Chile
    741.4×
  42. 40Villa Poeta José Gálvez BarrenecheaLima region, Peru
    741.4×
  43. 43BensalemPennsylvania, United States
    731.4×
  44. 44AntananarivoAnalamanga, Madagascar
    731.4×
  45. 44Quezon Citylow-cost sensorsNational Capital Region, Philippines
    731.4×
  46. 44Tuen MunTuen Mun, Hong Kong
    731.4×
  47. 44SalamancaGuanajuato, Mexico
    731.4×
  48. 44Coeur d'AleneIdaho, United States
    731.4×
  49. 49Tin Shui WaiYuen Long, Hong Kong
    731.4×
  50. 49Spokane ValleyWashington, United States
    731.4×
  51. 51SalorTashkent Region, Uzbekistan
    711.3×
  52. 52San Tung Chung HangIslands, Hong Kong
    711.3×
  53. 53Kathmandulow-cost sensorsBagmati Province, Nepal
    701.3×
  54. 54KisarazuChiba, Japan
    701.3×
  55. 55SpokaneWashington, United States
    691.3×
  56. 56Kwai ChungKwai Tsing District, Hong Kong
    691.3×
  57. 57HiratsukaKanagawa, Japan
    691.2×
  58. 58Sham Shui PoSham Shui Po District, Hong Kong
    681.2×
  59. 58NacimientoBiobio, Chile
    681.2×
  60. 60Kuala LumpurKuala Lumpur, Malaysia
    681.2×
  61. 61Tsuen WanTsuen Wan, Hong Kong
    681.2×
  62. 61LimaLima Province, Peru
    681.2×
  63. 63YamanashiYamanashi, Japan
    671.2×
  64. 64AstanaAstana, Kazakhstan
    671.2×
  65. 64FanlingNorth District, Hong Kong
    671.2×
  66. 64ConcónValparaiso, Chile
    671.2×
  67. 67Sau Mau PingKwun Tong District, Hong Kong
    661.2×
  68. 67ChigasakiKanagawa, Japan
    661.2×
  69. 69FontanaCalifornia, United States
    661.2×
  70. 70Viña del MarValparaiso, Chile
    661.1×
  71. 70LewistonIdaho, United States
    661.1×
  72. 72Kampalalow-cost sensorsCentral Region, Uganda
    661.1×
  73. 72Tai PoTai Po, Hong Kong
    661.1×
  74. 74KimitsuChiba, Japan
    651.1×
  75. 74Yuba CityCalifornia, United States
    651.1×
  76. 76ChicoCalifornia, United States
    651.1×
  77. 76TerraceBritish Columbia, Canada
    651.1×
  78. 78San Pedro de la PazBiobio, Chile
    641.1×
  79. 79OdawaraKanagawa, Japan
    641.1×
  80. 79San CarlosÑuble, Chile
    641.1×
  81. 79ChikuseiIbaraki, Japan
    641.1×
  82. 82MoscowIdaho, United States
    641.1×
  83. 83New BrunswickNew Jersey, United States
    641.1×
  84. 83CourtenayBritish Columbia, Canada
    641.1×
  85. 83DuncanBritish Columbia, Canada
    641.1×
  86. 86TateyamaChiba, Japan
    631.1×
  87. 86KurihamaKanagawa, Japan
    631.1×
  88. 86FairbanksAlaska, United States
    631.1×
  89. 89CalamaAntofagasta, Chile
    631.0×
  90. 90ThessaloníkiCentral Macedonia, Greece
    631.0×
  91. 90ŌharaChiba, Japan
    631.0×
  92. 92HarewoodBritish Columbia, Canada
    631.0×
  93. 93Addis AbabaAddis Ababa, Ethiopia
    631.0×
  94. 93Tha BoNong Khai, Thailand
    631.0×
  95. 93ŌtsukiYamanashi, Japan
    631.0×
  96. 93SusonoShizuoka, Japan
    631.0×
  97. 97FujiShizuoka, Japan
    621.0×
  98. 98KazoSaitama, Japan
    621.0×
  99. 98BanningCalifornia, United States
    621.0×
  100. 100MobaraChiba, Japan
    621.0×
  101. 100IndioCalifornia, United States
    621.0×
  102. 102TrentonNew Jersey, United States
    621.0×
  103. 102San Francisco De BorjaLima region, Peru
    621.0×
  104. 104BakersfieldCalifornia, United States
    621.0×
  105. 104AyaseKanagawa, Japan
    621.0×
  106. 106Sha TinSha Tin, Hong Kong
    611.0×
  107. 106Kodamachō-kodamaminamiSaitama, Japan
    611.0×
  108. 106AtamiShizuoka, Japan
    611.0×
  109. 106YachiyoChiba, Japan
    611.0×
  110. 110YokosukaKanagawa, Japan
    611.0×
  111. 110MinawaKanagawa, Japan
    611.0×
  112. 110MiuraKanagawa, Japan
    611.0×
  113. 113TalcahuanoBiobio, Chile
    611.0×
  114. 114PátraWest Greece, Greece
    611.0×
  115. 114HadanoKanagawa, Japan
    611.0×
  116. 114ChichibuSaitama, Japan
    611.0×
  117. 114FresnoCalifornia, United States
    611.0×
  118. 118NumazuShizuoka, Japan
    611.0×
  119. 118ConakryConakry, Guinea
    611.0×
  120. 118BarnsleyEngland, United Kingdom
    611.0×
  121. 118BrawleyCalifornia, United States
    611.0×
  122. 118RoseburgOregon, United States
    611.0×
  123. 123YamagataYamagata, Japan
    610.9×
  124. 123NagaiYamagata, Japan
    610.9×
  125. 123DěčínÚstí nad Labem Region, Czechia
    610.9×
  126. 123BirminghamAlabama, United States
    610.9×
  127. 123IrumaSaitama, Japan
    610.9×
  128. 128NairobiNairobi County, Kenya
    600.9×
  129. 128ŌamiChiba, Japan
    600.9×
  130. 128AnchorageAlaska, United States
    600.9×
  131. 131ChesterPennsylvania, United States
    600.9×
  132. 131ComptonCalifornia, United States
    600.9×
  133. 133MinamirinkanKanagawa, Japan
    600.9×
  134. 133WilmingtonDelaware, United States
    600.9×
  135. 133East RidgeTennessee, United States
    600.9×
  136. 133SodegauraChiba, Japan
    600.9×
  137. 137WoodlandCalifornia, United States
    600.9×
  138. 137MinamiashigaraKanagawa, Japan
    600.9×
  139. 137IzunokuniShizuoka, Japan
    600.9×
  140. 140AtsugiKanagawa, Japan
    600.9×
  141. 140KennesawGeorgia, United States
    600.9×
  142. 142AthensAttica, Greece
    590.9×
  143. 142KofuYamanashi, Japan
    590.9×
  144. 144Tanushimarumachi-toyokiFukuoka, Japan
    590.9×
  145. 144ShizuokaShizuoka, Japan
    590.9×
  146. 144AiharaKanagawa, Japan
    590.9×
  147. 144IchiharaChiba, Japan
    590.9×
  148. 144CentraliaWashington, United States
    590.9×
  149. 144Misato, SaitamaSaitama, Japan
    590.9×
  150. 150TakasakiGunma, Japan
    590.9×
  151. 150LeedsEngland, United Kingdom
    590.9×
  152. 150PhiladelphiaPennsylvania, United States
    590.9×
  153. 153TomiokaGunma, Japan
    590.9×
  154. 153IshinomakiMiyagi, Japan
    590.9×
  155. 155MiyakonojōMiyazaki, Japan
    590.9×
  156. 155YorkEngland, United Kingdom
    590.9×
  157. 155RedmondOregon, United States
    590.9×
  158. 155NiizaSaitama, Japan
    590.9×
  159. 159FujisawaKanagawa, Japan
    580.9×
  160. 159ŻabbarĦaż-Żabbar, Malta
    580.9×
  161. 159RiversideCalifornia, United States
    580.9×
  162. 159PendletonOregon, United States
    580.9×
  163. 159JōsōIbaraki, Japan
    580.9×
  164. 159YamatoKanagawa, Japan
    580.9×
  165. 165KamakuraKanagawa, Japan
    580.9×
  166. 165IgusaSaitama, Japan
    580.9×
  167. 165HakodateHokkaido, Japan
    580.9×
  168. 165HernandoMississippi, United States
    580.9×
  169. 165Saint CloudMinnesota, United States
    580.9×
  170. 165Jurupa ValleyCalifornia, United States
    580.9×
  171. 171HonmachiKumamoto, Japan
    580.9×
  172. 171ChibaChiba, Japan
    580.9×
  173. 171SliemaTas-Sliema, Malta
    580.9×
  174. 171FujiyoshidaYamanashi, Japan
    580.9×
  175. 175YokohamaKanagawa, Japan
    580.9×
  176. 175CallaoCallao, Peru
    580.9×
  177. 175ShakopeeMinnesota, United States
    580.9×
  178. 175MaderaCalifornia, United States
    580.9×
  179. 175VancouverBritish Columbia, Canada
    580.9×
  180. 180SusakiKochi, Japan
    580.8×
  181. 180ŌmeTokyo, Japan
    580.8×
  182. 180GyōdaSaitama, Japan
    580.8×
  183. 180CelayaGuanajuato, Mexico
    580.8×
  184. 180ChattanoogaTennessee, United States
    580.8×
  185. 180PentictonBritish Columbia, Canada
    580.8×
  186. 180Prince GeorgeBritish Columbia, Canada
    580.8×
  187. 180Saint JohnNew Brunswick, Canada
    580.8×
  188. 180VictoriaBritish Columbia, Canada
    580.8×
  189. 189KasukabeSaitama, Japan
    580.8×
  190. 189YotsukaidōChiba, Japan
    580.8×
  191. 189NottinghamEngland, United Kingdom
    580.8×
  192. 189South LaurelMaryland, United States
    580.8×
  193. 193YokotaTokyo, Japan
    570.8×
  194. 193AnaheimCalifornia, United States
    570.8×
  195. 193ParklandWashington, United States
    570.8×
  196. 193RentonWashington, United States
    570.8×
  197. 197UtoKumamoto, Japan
    570.8×
  198. 197UrayasuChiba, Japan
    570.8×
  199. 197NodaChiba, Japan
    570.8×
  200. 197NakamuraKochi, Japan
    570.8×

Top 200 of 1,866 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, October 28, 2023, smogrank.com/history/2023-10-28 (accessed 2 Oct 2026).

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