SmogRank / History / September 15, 2023

Most polluted cities on September 15, 2023

1,831 cities ranked by their average PM2.5 over the day; the worst was Tha Bo, Thailand, at 171.0 µg/m³. Each city's own local calendar day.

← Tha Bo 171.0 µg/m³ 150 µg/m³15 WHO 24-hour guideline
Every city ranked for September 15, 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. 1Tha BoNong Khai, Thailand
    24611.4×
  2. 2DushanbeDushanbe, Tajikistan
    1856.9×
  3. 3San CarlosÑuble, Chile
    1695.4×
  4. 4Prince GeorgeBritish Columbia, Canada
    1695.4×
  5. 5Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1634.9×
  6. 6ReginaSaskatchewan, Canada
    1634.8×
  7. 7Prince AlbertSaskatchewan, Canada
    1584.4×
  8. 8ChillánÑuble, Chile
    1564.2×
  9. 9Lahorelow-cost sensorsPunjab, Pakistan
    1403.4×
  10. 10Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1222.9×
  11. 11AlexandriaAlexandria, Egypt
    1202.9×
  12. 12JakartaJakarta, Indonesia
    1182.8×
  13. 13Islamabadlow-cost sensorsIslamabad, Pakistan
    1162.8×
  14. 14SantiagoSantiago Metropolitan, Chile
    1152.7×
  15. 15Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    1122.7×
  16. 16SaskatoonSaskatchewan, Canada
    1122.7×
  17. 17TlaquepaqueJalisco, Mexico
    1112.6×
  18. 18Addis AbabaAddis Ababa, Ethiopia
    1062.5×
  19. 19CuranilahueBiobio, Chile
    1032.4×
  20. 20Dhakalow-cost sensorsDhaka Division, Bangladesh
    1002.3×
  21. 21BeijingBeijing, China
    992.3×
  22. 22AlgiersAlgiers, Algeria
    982.3×
  23. 23San Salvador TizatlalliMéxico, Mexico
    972.2×
  24. 24MexicaliBaja California, Mexico
    952.2×
  25. 25BamakoBamako, Mali
    952.2×
  26. 26TalaganteSantiago Metropolitan, Chile
    932.1×
  27. 26LimaLima Province, Peru
    932.1×
  28. 28Fort St. JohnBritish Columbia, Canada
    932.1×
  29. 29TolucaMéxico, Mexico
    922.1×
  30. 30San Francisco TlalcilalcalpanMéxico, Mexico
    922.1×
  31. 31PristinaPristina, Kosovo
    922.1×
  32. 31Puente AltoSantiago Metropolitan, Chile
    922.1×
  33. 31EdmontonAlberta, Canada
    922.1×
  34. 34JeddahMecca Region, Saudi Arabia
    912.0×
  35. 35West FargoNorth Dakota, United States
    912.0×
  36. 36Ciudad NezahualcoyotlMéxico, Mexico
    912.0×
  37. 36Villa Poeta José Gálvez BarrenecheaLima region, Peru
    912.0×
  38. 38NairobiNairobi County, Kenya
    902.0×
  39. 39DelhiDelhi, India
    902.0×
  40. 40CoyhaiqueAysén, Chile
    892.0×
  41. 41Puerto MonttLos Lagos Region, Chile
    881.9×
  42. 42XonacatlánMéxico, Mexico
    881.9×
  43. 43CopiapóAtacama, Chile
    881.9×
  44. 44Kampalalow-cost sensorsCentral Region, Uganda
    861.9×
  45. 45NacimientoBiobio, Chile
    851.8×
  46. 45GuadalajaraJalisco, Mexico
    851.8×
  47. 47La SerenaCoquimbo Region, Chile
    841.8×
  48. 47CuricóMaule Region, Chile
    841.8×
  49. 49Grande PrairieAlberta, Canada
    831.8×
  50. 50AntofagastaAntofagasta, Chile
    831.8×
  51. 51RancaguaO'Higgins Region, Chile
    821.7×
  52. 52SarajevoFederation of B&H, Bosnia and Herzegovina
    821.7×
  53. 53Puerto VarasLos Lagos Region, Chile
    811.7×
  54. 53La UniónLos Ríos Region, Chile
    811.7×
  55. 55CauquenesMaule Region, Chile
    811.7×
  56. 55Santa Anita - Los FicusLima region, Peru
    811.7×
  57. 57AthensAttica, Greece
    801.7×
  58. 58TocopillaAntofagasta, Chile
    801.6×
  59. 59Puerto AysénAysén, Chile
    791.6×
  60. 59OlatheKansas, United States
    791.6×
  61. 61Abujalow-cost sensorsFCT, Nigeria
    781.6×
  62. 61QuillotaValparaiso, Chile
    781.6×
  63. 63San Francisco De BorjaLima region, Peru
    781.6×
  64. 64CoquimboCoquimbo Region, Chile
    781.6×
  65. 64BrandonManitoba, Canada
    781.6×
  66. 64SusonoShizuoka, Japan
    781.6×
  67. 67Kuala LumpurKuala Lumpur, Malaysia
    781.6×
  68. 67CoronelBiobio, Chile
    781.6×
  69. 69MinamataKumamoto, Japan
    771.5×
  70. 70AntananarivoAnalamanga, Madagascar
    771.5×
  71. 70KamloopsBritish Columbia, Canada
    771.5×
  72. 72Ulu BedokSingapore
    771.5×
  73. 72PueblaPuebla, Mexico
    771.5×
  74. 74ZapopanJalisco, Mexico
    761.5×
  75. 75AsprópyrgosAttica, Greece
    761.5×
  76. 76QuinteroValparaiso, Chile
    761.5×
  77. 77RengoO'Higgins Region, Chile
    751.5×
  78. 77OsornoLos Lagos Region, Chile
    751.5×
  79. 79Botevgradlow-cost sensorsSofia, Bulgaria
    741.4×
  80. 80RuseRuse, Bulgaria
    741.4×
  81. 81Karachilow-cost sensorsSindh, Pakistan
    731.4×
  82. 81ConcónValparaiso, Chile
    731.4×
  83. 83ShenyangLiaoning, China
    731.4×
  84. 84FujinomiyaShizuoka, Japan
    731.4×
  85. 85CuernavacaMorelos, Mexico
    731.4×
  86. 86Mexico CityMexico City, Mexico
    721.4×
  87. 86FontanaCalifornia, United States
    721.4×
  88. 88NaplesCampania, Italy
    721.4×
  89. 89Fort McMurrayAlberta, Canada
    721.4×
  90. 90HanoiHanoi, Vietnam
    721.4×
  91. 91TalcaMaule Region, Chile
    711.3×
  92. 92Ciudad General EscobedoNuevo León, Mexico
    711.3×
  93. 93AstanaAstana, Kazakhstan
    711.3×
  94. 93Alto HospicioTarapacá, Chile
    711.3×
  95. 95NišCentral Serbia, Serbia
    701.3×
  96. 95HonmachiKumamoto, Japan
    701.3×
  97. 97AricaArica y Parinacota Region, Chile
    701.3×
  98. 97BirminghamAlabama, United States
    701.3×
  99. 99PiraeusAttica, Greece
    691.3×
  100. 99Naucalpan de JuárezMéxico, Mexico
    691.3×
  101. 101Ang Mo Kio New TownSingapore
    691.3×
  102. 101Viña del MarValparaiso, Chile
    691.3×
  103. 101SalamancaGuanajuato, Mexico
    691.3×
  104. 104Santa CatarinaNuevo León, Mexico
    691.3×
  105. 104IndioCalifornia, United States
    691.3×
  106. 106ChennaiTamil Nadu, India
    691.2×
  107. 106AnconaThe Marches, Italy
    691.2×
  108. 108San Luis de la PazGuanajuato, Mexico
    691.2×
  109. 109HitoyoshiKumamoto, Japan
    681.2×
  110. 110LotaBiobio, Chile
    681.2×
  111. 110La Crescenta-Montroselow-cost sensorsCalifornia, United States
    681.2×
  112. 112N'DjamenaN’Djaména, Chad
    681.2×
  113. 112BanningCalifornia, United States
    681.2×
  114. 112Red DeerAlberta, Canada
    681.2×
  115. 115TalcahuanoBiobio, Chile
    681.2×
  116. 116SalorTashkent Region, Uzbekistan
    671.2×
  117. 116ChilliwackBritish Columbia, Canada
    671.2×
  118. 118Kathmandulow-cost sensorsBagmati Province, Nepal
    671.2×
  119. 119ŁukówLublin, Poland
    671.2×
  120. 119ZentsujichóKagawa, Japan
    671.2×
  121. 121Samut SakhonSamut Sakhon, Thailand
    671.2×
  122. 122AberdeenSouth Dakota, United States
    661.2×
  123. 122CalexicoCalifornia, United States
    661.2×
  124. 124Kan’onjichōKagawa, Japan
    661.1×
  125. 125Tepeji del Río de OcampoHidalgo, Mexico
    661.1×
  126. 126ThessaloníkiCentral Macedonia, Greece
    661.1×
  127. 126Los ÁngelesBiobio, Chile
    661.1×
  128. 128QuilpuéValparaiso, Chile
    661.1×
  129. 129KolkataWest Bengal, India
    651.1×
  130. 130FujiedaShizuoka, Japan
    651.1×
  131. 130TulsaOklahoma, United States
    651.1×
  132. 130San Pedro de la PazBiobio, Chile
    651.1×
  133. 133AcharnésAttica, Greece
    651.1×
  134. 133IwataShizuoka, Japan
    651.1×
  135. 133MonterreyNuevo León, Mexico
    651.1×
  136. 136HyderabadTelangana, India
    651.1×
  137. 137TamanaKumamoto, Japan
    651.1×
  138. 137TemucoAraucania, Chile
    651.1×
  139. 139PassauBavaria, Germany
    641.1×
  140. 139Ciudad ApodacaNuevo León, Mexico
    641.1×
  141. 141BangkokBangkok, Thailand
    641.1×
  142. 141TakasakiGunma, Japan
    641.1×
  143. 141RiversideCalifornia, United States
    641.1×
  144. 144AtamiShizuoka, Japan
    631.1×
  145. 145SofiaSofia-Capital, Bulgaria
    631.0×
  146. 145KasaokaOkayama, Japan
    631.0×
  147. 145Ciudad Benito JuárezNuevo León, Mexico
    631.0×
  148. 148AlessandriaPiedmont, Italy
    631.0×
  149. 148Jurupa ValleyCalifornia, United States
    631.0×
  150. 150FukuroiShizuoka, Japan
    631.0×
  151. 150VigoGalicia, Spain
    631.0×
  152. 150JenksOklahoma, United States
    631.0×
  153. 153GuangzhouGuangdong, China
    631.0×
  154. 153ValdiviaLos Ríos Region, Chile
    631.0×
  155. 155BucharestBucharest, Romania
    631.0×
  156. 155MarugameKagawa, Japan
    631.0×
  157. 155SalernoCampania, Italy
    631.0×
  158. 155SaltilloCoahuila, Mexico
    631.0×
  159. 155YatomiAichi, Japan
    631.0×
  160. 160Almatylow-cost sensorsAlmaty, Kazakhstan
    621.0×
  161. 160ŌtsukiYamanashi, Japan
    621.0×
  162. 160Ciudad JuárezChihuahua, Mexico
    621.0×
  163. 160MidwayFlorida, United States
    621.0×
  164. 164KhalándrionAttica, Greece
    621.0×
  165. 164Accralow-cost sensorsGreater Accra, Ghana
    621.0×
  166. 166ŌzuKumamoto, Japan
    621.0×
  167. 166KumamotoKumamoto, Japan
    621.0×
  168. 166MóstolesMadrid, Spain
    621.0×
  169. 166CalamaAntofagasta, Chile
    621.0×
  170. 170Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    621.0×
  171. 170AraoKumamoto, Japan
    621.0×
  172. 172HanfordCalifornia, United States
    611.0×
  173. 173ChigasakiKanagawa, Japan
    611.0×
  174. 173Queenstown Estatelow-cost sensorsSingapore
    611.0×
  175. 173Falconara MarittimaThe Marches, Italy
    611.0×
  176. 173HueytownAlabama, United States
    611.0×
  177. 173Ferry PassFlorida, United States
    611.0×
  178. 173BakersfieldCalifornia, United States
    611.0×
  179. 173ShikokuchūōEhime, Japan
    611.0×
  180. 180Sevlievolow-cost sensorsGabrovo, Bulgaria
    611.0×
  181. 180Nong KhaemBangkok, Thailand
    611.0×
  182. 180EvergemFlanders, Belgium
    611.0×
  183. 180ChiguayanteBiobio, Chile
    611.0×
  184. 180KotōKumamoto, Japan
    611.0×
  185. 185Wan ChaiWan Chai, Hong Kong
    611.0×
  186. 185Jurong WestSingapore
    611.0×
  187. 185SliemaTas-Sliema, Malta
    611.0×
  188. 188MifuneKumamoto, Japan
    610.9×
  189. 188ToméBiobio, Chile
    610.9×
  190. 188Santa ClaritaCalifornia, United States
    610.9×
  191. 191JesiThe Marches, Italy
    600.9×
  192. 191DallasTexas, United States
    600.9×
  193. 193NakatsuOita, Japan
    600.9×
  194. 193EugeneOregon, United States
    600.9×
  195. 195TamanoOkayama, Japan
    600.9×
  196. 195ConakryConakry, Guinea
    600.9×
  197. 197ŌmutaFukuoka, Japan
    600.9×
  198. 197Baton RougeLouisiana, United States
    600.9×
  199. 197GlendoraCalifornia, United States
    600.9×
  200. 197AyaseKanagawa, Japan
    600.9×

Top 200 of 1,831 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 15, 2023, smogrank.com/history/2023-09-15 (accessed 2 Oct 2026).

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