SmogRank / History / September 24, 2023

Most polluted cities on September 24, 2023

1,877 cities ranked by their average PM2.5 over the day; the worst was Peshawar, Pakistan, at 68.8 µg/m³. Each city's own local calendar day.

Bad-air episodes during September 24, 2023. All episodes.

← Peshawar 68.8 µg/m³ 60 µg/m³15 WHO 24-hour guideline
Every city ranked for September 24, 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. 1Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1604.6×
  2. 2OsornoLos Lagos Region, Chile
    1604.6×
  3. 3CoyhaiqueAysén, Chile
    1423.5×
  4. 4La UniónLos Ríos Region, Chile
    1403.4×
  5. 5DelhiDelhi, India
    1333.2×
  6. 6Lahorelow-cost sensorsPunjab, Pakistan
    1323.2×
  7. 7RoseburgOregon, United States
    1313.2×
  8. 8Dhakalow-cost sensorsDhaka Division, Bangladesh
    1283.1×
  9. 9MedfordOregon, United States
    1253.0×
  10. 10Puerto VarasLos Lagos Region, Chile
    1212.9×
  11. 11Duque de CaxiasRio de Janeiro, Brazil
    1132.7×
  12. 12EsztergomKomárom-Esztergom, Hungary
    1122.7×
  13. 13AthensAttica, Greece
    1112.6×
  14. 14AshlandOregon, United States
    1052.5×
  15. 15HualquiBiobio, Chile
    1032.4×
  16. 16MexicaliBaja California, Mexico
    1032.4×
  17. 17JakartaJakarta, Indonesia
    1022.4×
  18. 18Santa Anita - Los FicusLima region, Peru
    992.3×
  19. 19NacimientoBiobio, Chile
    982.3×
  20. 20BendOregon, United States
    972.2×
  21. 21Puente AltoSantiago Metropolitan, Chile
    962.2×
  22. 22SantiagoSantiago Metropolitan, Chile
    952.2×
  23. 22Puerto MonttLos Lagos Region, Chile
    952.2×
  24. 24AsprópyrgosAttica, Greece
    952.2×
  25. 25Villa Poeta José Gálvez BarrenecheaLima region, Peru
    942.1×
  26. 26PiraeusAttica, Greece
    932.1×
  27. 27RedmondOregon, United States
    932.1×
  28. 28Puerto AysénAysén, Chile
    922.1×
  29. 29AltamontOregon, United States
    892.0×
  30. 30BamakoBamako, Mali
    881.9×
  31. 31HanoiHanoi, Vietnam
    881.9×
  32. 32Kampalalow-cost sensorsCentral Region, Uganda
    881.9×
  33. 33RancaguaO'Higgins Region, Chile
    881.9×
  34. 34Şabāḩ as SālimMubārak al Kabīr, Kuwait
    871.9×
  35. 34EugeneOregon, United States
    871.9×
  36. 36AcharnésAttica, Greece
    861.9×
  37. 37LimaLima Province, Peru
    851.8×
  38. 38Tha BoNong Khai, Thailand
    851.8×
  39. 39FontanaCalifornia, United States
    851.8×
  40. 40Addis AbabaAddis Ababa, Ethiopia
    841.8×
  41. 41Torrancelow-cost sensorsCalifornia, United States
    841.8×
  42. 42BeijingBeijing, China
    841.8×
  43. 42ComptonCalifornia, United States
    841.8×
  44. 44TijuanaBaja California, Mexico
    841.8×
  45. 44BirminghamAlabama, United States
    841.8×
  46. 44Carsonlow-cost sensorsCalifornia, United States
    841.8×
  47. 44Hawthornelow-cost sensorsCalifornia, United States
    841.8×
  48. 48Los AngelesCalifornia, United States
    831.8×
  49. 49KhalándrionAttica, Greece
    831.8×
  50. 49Inglewoodlow-cost sensorsCalifornia, United States
    831.8×
  51. 51ValdiviaLos Ríos Region, Chile
    831.7×
  52. 52AnaheimCalifornia, United States
    821.7×
  53. 53São PauloSão Paulo, Brazil
    821.7×
  54. 53Jurupa ValleyCalifornia, United States
    821.7×
  55. 55CholulaPuebla, Mexico
    821.7×
  56. 56BakuBaki, Azerbaijan
    811.7×
  57. 57Santa Monicalow-cost sensorsCalifornia, United States
    811.7×
  58. 58SalorTashkent Region, Uzbekistan
    811.7×
  59. 59Alto HospicioTarapacá, Chile
    801.7×
  60. 60Chula VistaCalifornia, United States
    801.6×
  61. 61BangkokBangkok, Thailand
    801.6×
  62. 62PristinaPristina, Kosovo
    801.6×
  63. 62VisaliaCalifornia, United States
    801.6×
  64. 64Nong KhaemBangkok, Thailand
    791.6×
  65. 65OceansideCalifornia, United States
    791.6×
  66. 66RiversideCalifornia, United States
    781.6×
  67. 66Grants PassOregon, United States
    781.6×
  68. 68TlaquepaqueJalisco, Mexico
    781.6×
  69. 68Lomitalow-cost sensorsCalifornia, United States
    781.6×
  70. 70HanfordCalifornia, United States
    781.6×
  71. 71Ciudad JuárezChihuahua, Mexico
    781.6×
  72. 72N'DjamenaN’Djaména, Chad
    771.5×
  73. 72CopiapóAtacama, Chile
    771.5×
  74. 74Long BeachCalifornia, United States
    771.5×
  75. 75CoronelBiobio, Chile
    761.5×
  76. 75Agouralow-cost sensorsCalifornia, United States
    761.5×
  77. 77San Francisco TlalcilalcalpanMéxico, Mexico
    761.5×
  78. 78CallaoCallao, Peru
    761.5×
  79. 78ClovisCalifornia, United States
    761.5×
  80. 78FresnoCalifornia, United States
    761.5×
  81. 81TalaganteSantiago Metropolitan, Chile
    751.5×
  82. 82San CarlosÑuble, Chile
    751.5×
  83. 83Islamabadlow-cost sensorsIslamabad, Pakistan
    751.5×
  84. 83Phra PradaengSamut Prakan, Thailand
    751.5×
  85. 83San DiegoCalifornia, United States
    751.5×
  86. 86QuillotaValparaiso, Chile
    751.5×
  87. 87CauquenesMaule Region, Chile
    751.5×
  88. 87PowayCalifornia, United States
    751.5×
  89. 89CorcoranCalifornia, United States
    741.4×
  90. 90CoquimboCoquimbo Region, Chile
    741.4×
  91. 90El CajonCalifornia, United States
    741.4×
  92. 92NairobiNairobi County, Kenya
    741.4×
  93. 92MaderaCalifornia, United States
    741.4×
  94. 94BakersfieldCalifornia, United States
    741.4×
  95. 94Santa BarbaraCalifornia, United States
    741.4×
  96. 96Ciudad ApodacaNuevo León, Mexico
    741.4×
  97. 97NagaiYamagata, Japan
    731.4×
  98. 97BurbankCalifornia, United States
    731.4×
  99. 97GlendoraCalifornia, United States
    731.4×
  100. 97San Francisco De BorjaLima region, Peru
    731.4×
  101. 101TalcahuanoBiobio, Chile
    731.4×
  102. 101RengoO'Higgins Region, Chile
    731.4×
  103. 103Thousand OaksCalifornia, United States
    721.4×
  104. 104Samut SakhonSamut Sakhon, Thailand
    721.4×
  105. 104GuangzhouGuangdong, China
    721.4×
  106. 106Little RockArkansas, United States
    721.4×
  107. 107Khlong LuangPathum Thani, Thailand
    721.3×
  108. 107SalamancaGuanajuato, Mexico
    721.3×
  109. 107PortervilleCalifornia, United States
    721.3×
  110. 110KolkataWest Bengal, India
    711.3×
  111. 111CuricóMaule Region, Chile
    711.3×
  112. 111ChillánÑuble, Chile
    711.3×
  113. 113Quezon Citylow-cost sensorsNational Capital Region, Philippines
    711.3×
  114. 113TocopillaAntofagasta, Chile
    711.3×
  115. 115CuranilahueBiobio, Chile
    711.3×
  116. 116NipomoCalifornia, United States
    711.3×
  117. 116TurlockCalifornia, United States
    711.3×
  118. 118Arroyo GrandeCalifornia, United States
    701.3×
  119. 119TemucoAraucania, Chile
    701.3×
  120. 120Bang Bo DistrictSamut Prakan, Thailand
    701.3×
  121. 120XonacatlánMéxico, Mexico
    701.3×
  122. 122Santa CatarinaNuevo León, Mexico
    691.3×
  123. 123La SerenaCoquimbo Region, Chile
    691.3×
  124. 123SalinasCalifornia, United States
    691.3×
  125. 125Los ÁngelesBiobio, Chile
    691.3×
  126. 125AntofagastaAntofagasta, Chile
    691.3×
  127. 127LompocCalifornia, United States
    691.2×
  128. 127TruckeeCalifornia, United States
    691.2×
  129. 129ConcónValparaiso, Chile
    691.2×
  130. 129La Crescenta-Montroselow-cost sensorsCalifornia, United States
    691.2×
  131. 131QuinteroValparaiso, Chile
    691.2×
  132. 131AricaArica y Parinacota Region, Chile
    691.2×
  133. 131AlbanyOregon, United States
    691.2×
  134. 134Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    681.2×
  135. 134ModestoCalifornia, United States
    681.2×
  136. 134Simi ValleyCalifornia, United States
    681.2×
  137. 137HueytownAlabama, United States
    681.2×
  138. 137San Luis ObispoCalifornia, United States
    681.2×
  139. 139ThessaloníkiCentral Macedonia, Greece
    681.2×
  140. 139ToméBiobio, Chile
    681.2×
  141. 141ChiguayanteBiobio, Chile
    681.2×
  142. 141ZapopanJalisco, Mexico
    681.2×
  143. 143TarnówLesser Poland, Poland
    671.2×
  144. 143ShenyangLiaoning, China
    671.2×
  145. 145Lagoslow-cost sensorsLagos, Nigeria
    671.2×
  146. 146Samut PrakanSamut Prakan, Thailand
    671.2×
  147. 147ConcepciónBiobio, Chile
    671.2×
  148. 148KingstonOntario, Canada
    661.2×
  149. 149OrcuttCalifornia, United States
    661.2×
  150. 150Wan ChaiWan Chai, Hong Kong
    661.1×
  151. 150MercedCalifornia, United States
    661.1×
  152. 150San Pedro de la PazBiobio, Chile
    661.1×
  153. 153Mueang NonthaburiNonthaburi, Thailand
    661.1×
  154. 153AlessandriaPiedmont, Italy
    661.1×
  155. 155Ang Mo Kio New TownSingapore
    651.1×
  156. 155CornwallOntario, Canada
    651.1×
  157. 157MumbaiMaharashtra, India
    651.1×
  158. 158PylaíaCentral Macedonia, Greece
    651.1×
  159. 158Nakhon PathomNakhon Pathom, Thailand
    651.1×
  160. 158TolucaMéxico, Mexico
    651.1×
  161. 161BurlingtonVermont, United States
    651.1×
  162. 161SalemOregon, United States
    651.1×
  163. 163CalamaAntofagasta, Chile
    641.1×
  164. 163East LakeFlorida, United States
    641.1×
  165. 165CuernavacaMorelos, Mexico
    641.1×
  166. 166SarajevoFederation of B&H, Bosnia and Herzegovina
    641.1×
  167. 167SofiaSofia-Capital, Bulgaria
    641.1×
  168. 168Viña del MarValparaiso, Chile
    641.1×
  169. 169Bang KapiBangkok, Thailand
    631.1×
  170. 169ParadiseCalifornia, United States
    631.1×
  171. 171FlorenceSouth Carolina, United States
    631.0×
  172. 171ChicoCalifornia, United States
    631.0×
  173. 173PeterboroughOntario, Canada
    631.0×
  174. 174MantecaCalifornia, United States
    631.0×
  175. 174OakvilleOntario, Canada
    631.0×
  176. 176LotaBiobio, Chile
    631.0×
  177. 176Ferry PassFlorida, United States
    631.0×
  178. 178Yuba CityCalifornia, United States
    631.0×
  179. 179HernandoMississippi, United States
    621.0×
  180. 179Santa ClaritaCalifornia, United States
    621.0×
  181. 179BellevilleOntario, Canada
    621.0×
  182. 182Ulu BedokSingapore
    621.0×
  183. 182StocktonCalifornia, United States
    621.0×
  184. 184TalcaMaule Region, Chile
    621.0×
  185. 185KalamazooMichigan, United States
    621.0×
  186. 185Jardines de la SillaNuevo León, Mexico
    621.0×
  187. 187GuadalajaraJalisco, Mexico
    621.0×
  188. 187AtascaderoCalifornia, United States
    621.0×
  189. 187NewmarketOntario, Canada
    621.0×
  190. 190JeddahMecca Region, Saudi Arabia
    611.0×
  191. 190ColumbusGeorgia, United States
    611.0×
  192. 190Coos BayOregon, United States
    611.0×
  193. 193Lake ElsinoreCalifornia, United States
    611.0×
  194. 193Carson CityNevada, United States
    611.0×
  195. 195San JoseCalifornia, United States
    611.0×
  196. 196BarrieOntario, Canada
    611.0×
  197. 197SpringfieldMissouri, United States
    610.9×
  198. 197BartlettTennessee, United States
    610.9×
  199. 197SherbrookeQuebec, Canada
    610.9×
  200. 200Ciudad NezahualcoyotlMéxico, Mexico
    600.9×

Top 200 of 1,877 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 24, 2023, smogrank.com/history/2023-09-24 (accessed 2 Oct 2026).

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