SmogRank / History / September 1, 2023

Most polluted cities on September 1, 2023

1,819 cities ranked by their average PM2.5 over the day; the worst was Dushanbe, Tajikistan, at 126.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during September 1, 2023. All episodes.

← Dushanbe 126.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for September 1, 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. 1DushanbeDushanbe, Tajikistan
    2018.4×
  2. 2SaskatoonSaskatchewan, Canada
    1917.5×
  3. 3Prince AlbertSaskatchewan, Canada
    1816.5×
  4. 4Dhakalow-cost sensorsDhaka Division, Bangladesh
    1735.8×
  5. 5EdmontonAlberta, Canada
    1665.1×
  6. 6Fort McMurrayAlberta, Canada
    1634.8×
  7. 7San CarlosÑuble, Chile
    1624.8×
  8. 8KolkataWest Bengal, India
    1604.6×
  9. 9Fort St. JohnBritish Columbia, Canada
    1584.4×
  10. 10Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1554.1×
  11. 11NacimientoBiobio, Chile
    1544.0×
  12. 12YumaArizona, United States
    1544.0×
  13. 13ReginaSaskatchewan, Canada
    1544.0×
  14. 14ChillánÑuble, Chile
    1533.9×
  15. 15JakartaJakarta, Indonesia
    1533.8×
  16. 16HyderabadTelangana, India
    1513.7×
  17. 17Islamabadlow-cost sensorsIslamabad, Pakistan
    1493.7×
  18. 18HanoiHanoi, Vietnam
    1423.5×
  19. 19CoyhaiqueAysén, Chile
    1343.3×
  20. 20CuranilahueBiobio, Chile
    1333.2×
  21. 21CalexicoCalifornia, United States
    1323.2×
  22. 22Sherwood ParkAlberta, Canada
    1303.1×
  23. 23Swift CurrentSaskatchewan, Canada
    1293.1×
  24. 24St. AlbertAlberta, Canada
    1253.0×
  25. 25CuernavacaMorelos, Mexico
    1253.0×
  26. 26KigaliKigali, Rwanda
    1202.9×
  27. 27Lahorelow-cost sensorsPunjab, Pakistan
    1202.9×
  28. 28CauquenesMaule Region, Chile
    1192.9×
  29. 29MexicaliBaja California, Mexico
    1172.8×
  30. 30BamakoBamako, Mali
    1172.8×
  31. 31Prince GeorgeBritish Columbia, Canada
    1142.7×
  32. 32Red DeerAlberta, Canada
    1132.7×
  33. 33TalcahuanoBiobio, Chile
    1112.6×
  34. 34Samut SakhonSamut Sakhon, Thailand
    1102.6×
  35. 35TolucaMéxico, Mexico
    1052.5×
  36. 36Puerto VarasLos Lagos Region, Chile
    1052.5×
  37. 36Los ÁngelesBiobio, Chile
    1052.5×
  38. 36San Salvador TizatlalliMéxico, Mexico
    1052.5×
  39. 39HualquiBiobio, Chile
    1032.4×
  40. 40DelhiDelhi, India
    1032.4×
  41. 41ToméBiobio, Chile
    1022.4×
  42. 41TalcaMaule Region, Chile
    1022.4×
  43. 43San Francisco TlalcilalcalpanMéxico, Mexico
    1012.4×
  44. 44XonacatlánMéxico, Mexico
    1002.4×
  45. 45La UniónLos Ríos Region, Chile
    992.3×
  46. 46Naucalpan de JuárezMéxico, Mexico
    992.3×
  47. 47Addis AbabaAddis Ababa, Ethiopia
    982.3×
  48. 48Puerto AysénAysén, Chile
    962.2×
  49. 49RancaguaO'Higgins Region, Chile
    962.2×
  50. 50Puente AltoSantiago Metropolitan, Chile
    952.2×
  51. 51OsornoLos Lagos Region, Chile
    952.2×
  52. 51CuricóMaule Region, Chile
    952.2×
  53. 53Kampalalow-cost sensorsCentral Region, Uganda
    942.1×
  54. 54SantiagoSantiago Metropolitan, Chile
    932.1×
  55. 55Ciudad NezahualcoyotlMéxico, Mexico
    932.1×
  56. 56RengoO'Higgins Region, Chile
    922.1×
  57. 57RoseburgOregon, United States
    912.1×
  58. 58Mexico CityMexico City, Mexico
    902.0×
  59. 59NairobiNairobi County, Kenya
    902.0×
  60. 60LimaLima Province, Peru
    902.0×
  61. 61ConcepciónBiobio, Chile
    892.0×
  62. 62QuinteroValparaiso, Chile
    881.9×
  63. 63TemucoAraucania, Chile
    881.9×
  64. 64TlaquepaqueJalisco, Mexico
    881.9×
  65. 65Grande PrairieAlberta, Canada
    871.9×
  66. 66San Pedro de la PazBiobio, Chile
    871.9×
  67. 67Puerto MonttLos Lagos Region, Chile
    871.9×
  68. 68N'DjamenaN’Djaména, Chad
    861.9×
  69. 69São PauloSão Paulo, Brazil
    861.9×
  70. 69CoronelBiobio, Chile
    861.9×
  71. 71Ciudad Benito JuárezNuevo León, Mexico
    851.8×
  72. 72Santa Anita - Los FicusLima region, Peru
    851.8×
  73. 73Ulu BedokSingapore
    851.8×
  74. 74CholulaPuebla, Mexico
    841.8×
  75. 75PristinaPristina, Kosovo
    831.8×
  76. 76Nong KhaemBangkok, Thailand
    831.8×
  77. 77TalaganteSantiago Metropolitan, Chile
    831.7×
  78. 78Villa Poeta José Gálvez BarrenecheaLima region, Peru
    811.7×
  79. 79QuillotaValparaiso, Chile
    801.7×
  80. 80ConcónValparaiso, Chile
    791.6×
  81. 81CalgaryAlberta, Canada
    781.6×
  82. 82Kathmandulow-cost sensorsBagmati Province, Nepal
    781.6×
  83. 83AntofagastaAntofagasta, Chile
    781.6×
  84. 83AltamontOregon, United States
    781.6×
  85. 85AntananarivoAnalamanga, Madagascar
    781.6×
  86. 85GuangzhouGuangdong, China
    781.6×
  87. 87Ciudad ApodacaNuevo León, Mexico
    771.6×
  88. 88BeijingBeijing, China
    771.5×
  89. 89ChiguayanteBiobio, Chile
    761.5×
  90. 90AricaArica y Parinacota Region, Chile
    761.5×
  91. 91ClovisCalifornia, United States
    751.5×
  92. 92TocopillaAntofagasta, Chile
    751.5×
  93. 93Santa CatarinaNuevo León, Mexico
    741.4×
  94. 94Ang Mo Kio New TownSingapore
    741.4×
  95. 95Şabāḩ as SālimMubārak al Kabīr, Kuwait
    741.4×
  96. 95San Francisco De BorjaLima region, Peru
    741.4×
  97. 97CoquimboCoquimbo Region, Chile
    741.4×
  98. 97Great FallsMontana, United States
    741.4×
  99. 99Viña del MarValparaiso, Chile
    731.4×
  100. 100Karachilow-cost sensorsSindh, Pakistan
    731.4×
  101. 100SarajevoFederation of B&H, Bosnia and Herzegovina
    731.4×
  102. 102La SerenaCoquimbo Region, Chile
    721.4×
  103. 102KelownaBritish Columbia, Canada
    721.4×
  104. 104PasadenaTexas, United States
    721.4×
  105. 105ShenyangLiaoning, China
    721.4×
  106. 105CopiapóAtacama, Chile
    721.4×
  107. 105ZapopanJalisco, Mexico
    721.4×
  108. 105FresnoCalifornia, United States
    721.4×
  109. 109PueblaPuebla, Mexico
    711.3×
  110. 110ManamaManama, Bahrain
    711.3×
  111. 111GuadalajaraJalisco, Mexico
    711.3×
  112. 112BangkokBangkok, Thailand
    711.3×
  113. 112Tepeji del Río de OcampoHidalgo, Mexico
    711.3×
  114. 112HanfordCalifornia, United States
    711.3×
  115. 112LompocCalifornia, United States
    711.3×
  116. 116Bang Bo DistrictSamut Prakan, Thailand
    711.3×
  117. 116CorcoranCalifornia, United States
    711.3×
  118. 118El CentroCalifornia, United States
    701.3×
  119. 119ValdiviaLos Ríos Region, Chile
    701.3×
  120. 120San Andrés TuxtlaVeracruz, Mexico
    691.2×
  121. 120Port ArthurTexas, United States
    691.2×
  122. 120West FargoNorth Dakota, United States
    691.2×
  123. 120BrawleyCalifornia, United States
    691.2×
  124. 124Samut PrakanSamut Prakan, Thailand
    681.2×
  125. 124WichitaKansas, United States
    681.2×
  126. 126ChennaiTamil Nadu, India
    681.2×
  127. 127Nakhon PathomNakhon Pathom, Thailand
    681.2×
  128. 127CelayaGuanajuato, Mexico
    681.2×
  129. 129YangonYangon, Myanmar
    681.2×
  130. 130PentictonBritish Columbia, Canada
    671.2×
  131. 131ComptonCalifornia, United States
    671.2×
  132. 132MonterreyNuevo León, Mexico
    671.2×
  133. 133HoustonTexas, United States
    671.2×
  134. 134GlendoraCalifornia, United States
    671.2×
  135. 134MaderaCalifornia, United States
    671.2×
  136. 136Khlong LuangPathum Thani, Thailand
    661.2×
  137. 136TijuanaBaja California, Mexico
    661.2×
  138. 138DerbyKansas, United States
    661.2×
  139. 138AirdrieAlberta, Canada
    661.2×
  140. 140LotaBiobio, Chile
    661.1×
  141. 141Abujalow-cost sensorsFCT, Nigeria
    661.1×
  142. 141SliemaTas-Sliema, Malta
    661.1×
  143. 141Ciudad JuárezChihuahua, Mexico
    661.1×
  144. 141AnaheimCalifornia, United States
    661.1×
  145. 145MooreOklahoma, United States
    661.1×
  146. 146EdmondOklahoma, United States
    651.1×
  147. 146Chula VistaCalifornia, United States
    651.1×
  148. 148NagaiYamagata, Japan
    651.1×
  149. 148San Luis de la PazGuanajuato, Mexico
    651.1×
  150. 150BakersfieldCalifornia, United States
    651.1×
  151. 151Phra PradaengSamut Prakan, Thailand
    651.1×
  152. 152Mueang NonthaburiNonthaburi, Thailand
    641.1×
  153. 153Missouri CityTexas, United States
    641.1×
  154. 153SaginawTexas, United States
    641.1×
  155. 153BurbankCalifornia, United States
    641.1×
  156. 153Santa BarbaraCalifornia, United States
    641.1×
  157. 157SulphurLouisiana, United States
    641.1×
  158. 157Oklahoma CityOklahoma, United States
    641.1×
  159. 157BaytownTexas, United States
    641.1×
  160. 157Mission BendTexas, United States
    641.1×
  161. 157Long BeachCalifornia, United States
    641.1×
  162. 162Santiago de QuerétaroQuerétaro, Mexico
    641.1×
  163. 162WatertownSouth Dakota, United States
    641.1×
  164. 164Collado-VillalbaMadrid, Spain
    631.1×
  165. 165PowayCalifornia, United States
    631.0×
  166. 165Santa ClaritaCalifornia, United States
    631.0×
  167. 167El CajonCalifornia, United States
    631.0×
  168. 167PortervilleCalifornia, United States
    631.0×
  169. 167San DiegoCalifornia, United States
    631.0×
  170. 170FontanaCalifornia, United States
    631.0×
  171. 170Los AngelesCalifornia, United States
    631.0×
  172. 172AustinTexas, United States
    631.0×
  173. 172Fort WorthTexas, United States
    631.0×
  174. 172RiversideCalifornia, United States
    631.0×
  175. 175Bang KapiBangkok, Thailand
    631.0×
  176. 175DallasTexas, United States
    631.0×
  177. 175OceansideCalifornia, United States
    631.0×
  178. 175Simi ValleyCalifornia, United States
    631.0×
  179. 175MedfordOregon, United States
    631.0×
  180. 175Rapid CitySouth Dakota, United States
    631.0×
  181. 181Queenstown Estatelow-cost sensorsSingapore
    621.0×
  182. 181CalamaAntofagasta, Chile
    621.0×
  183. 181Baton RougeLouisiana, United States
    621.0×
  184. 181VisaliaCalifornia, United States
    621.0×
  185. 185La PorteTexas, United States
    621.0×
  186. 186AmmanAmman, Jordan
    621.0×
  187. 186TakasakiGunma, Japan
    621.0×
  188. 186Medicine HatAlberta, Canada
    621.0×
  189. 189NišCentral Serbia, Serbia
    621.0×
  190. 189BeltonTexas, United States
    621.0×
  191. 189Jurupa ValleyCalifornia, United States
    621.0×
  192. 192BirminghamAlabama, United States
    621.0×
  193. 192GalvestonTexas, United States
    621.0×
  194. 194MóstolesMadrid, Spain
    611.0×
  195. 194BrookingsSouth Dakota, United States
    611.0×
  196. 196Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    611.0×
  197. 197Santa Cruz de TenerifeCanary Islands, Spain
    611.0×
  198. 197Alcalá de HenaresMadrid, Spain
    611.0×
  199. 197LawtonOklahoma, United States
    611.0×
  200. 200Ponca CityOklahoma, United States
    611.0×

Top 200 of 1,819 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 1, 2023, smogrank.com/history/2023-09-01 (accessed 2 Oct 2026).

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