SmogRank / History / September 14, 2023

Most polluted cities on September 14, 2023

1,871 cities ranked by their average PM2.5 over the day; the worst was Piedras Negras, Mexico, at 986.0 µg/m³. Each city's own local calendar day.

← Piedras Negras 986.0 µg/m³ 900 µg/m³15 WHO 24-hour guideline
Every city ranked for September 14, 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. 1Piedras NegrasCoahuila, Mexico
    500+65.7×
  2. 2DushanbeDushanbe, Tajikistan
    2199.6×
  3. 3SaltilloCoahuila, Mexico
    1745.9×
  4. 4Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1634.8×
  5. 5Grande PrairieAlberta, Canada
    1574.3×
  6. 6Lahorelow-cost sensorsPunjab, Pakistan
    1574.2×
  7. 7BamakoBamako, Mali
    1554.1×
  8. 8Islamabadlow-cost sensorsIslamabad, Pakistan
    1523.8×
  9. 9DelhiDelhi, India
    1423.5×
  10. 10AlexandriaAlexandria, Egypt
    1172.8×
  11. 11JeddahMecca Region, Saudi Arabia
    1172.8×
  12. 12CuricóMaule Region, Chile
    1152.7×
  13. 13MexicaliBaja California, Mexico
    1082.6×
  14. 14EdmontonAlberta, Canada
    1082.6×
  15. 15Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1072.5×
  16. 15RancaguaO'Higgins Region, Chile
    1072.5×
  17. 17Puente AltoSantiago Metropolitan, Chile
    1032.4×
  18. 18ReginaSaskatchewan, Canada
    1022.4×
  19. 19Samut SakhonSamut Sakhon, Thailand
    1002.3×
  20. 20SantiagoSantiago Metropolitan, Chile
    982.3×
  21. 20San Salvador TizatlalliMéxico, Mexico
    982.3×
  22. 22PristinaPristina, Kosovo
    982.3×
  23. 23TolucaMéxico, Mexico
    962.2×
  24. 24CuranilahueBiobio, Chile
    962.2×
  25. 25RengoO'Higgins Region, Chile
    952.2×
  26. 26TlaquepaqueJalisco, Mexico
    942.2×
  27. 27GuadalajaraJalisco, Mexico
    932.1×
  28. 28JakartaJakarta, Indonesia
    932.1×
  29. 28XonacatlánMéxico, Mexico
    932.1×
  30. 30CoyhaiqueAysén, Chile
    922.1×
  31. 31Addis AbabaAddis Ababa, Ethiopia
    912.0×
  32. 32KigaliKigali, Rwanda
    892.0×
  33. 33Fort McMurrayAlberta, Canada
    881.9×
  34. 34San Francisco TlalcilalcalpanMéxico, Mexico
    871.9×
  35. 35AntofagastaAntofagasta, Chile
    871.9×
  36. 36San CarlosÑuble, Chile
    871.9×
  37. 36NacimientoBiobio, Chile
    871.9×
  38. 36SaskatoonSaskatchewan, Canada
    871.9×
  39. 39TalaganteSantiago Metropolitan, Chile
    851.8×
  40. 40TocopillaAntofagasta, Chile
    851.8×
  41. 41AnconaThe Marches, Italy
    851.8×
  42. 42ShenyangLiaoning, China
    841.8×
  43. 42SarajevoFederation of B&H, Bosnia and Herzegovina
    841.8×
  44. 44Puerto AysénAysén, Chile
    821.7×
  45. 44Prince AlbertSaskatchewan, Canada
    821.7×
  46. 46TalcaMaule Region, Chile
    821.7×
  47. 46CopiapóAtacama, Chile
    821.7×
  48. 48Kampalalow-cost sensorsCentral Region, Uganda
    821.7×
  49. 49LimaLima Province, Peru
    811.7×
  50. 50Naucalpan de JuárezMéxico, Mexico
    801.7×
  51. 51ChennaiTamil Nadu, India
    801.7×
  52. 52Falconara MarittimaThe Marches, Italy
    801.6×
  53. 53DębicaSubcarpathia, Poland
    801.6×
  54. 53AntananarivoAnalamanga, Madagascar
    801.6×
  55. 55BerounCentral Bohemia, Czechia
    791.6×
  56. 56QuillotaValparaiso, Chile
    791.6×
  57. 57BeijingBeijing, China
    781.6×
  58. 57N'DjamenaN’Djaména, Chad
    781.6×
  59. 57ChillánÑuble, Chile
    781.6×
  60. 60La SerenaCoquimbo Region, Chile
    781.6×
  61. 61Mexico CityMexico City, Mexico
    781.6×
  62. 62Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    771.6×
  63. 62CoquimboCoquimbo Region, Chile
    771.6×
  64. 64Dhakalow-cost sensorsDhaka Division, Bangladesh
    771.5×
  65. 65Ciudad ApodacaNuevo León, Mexico
    761.5×
  66. 66CauquenesMaule Region, Chile
    761.5×
  67. 67QuinteroValparaiso, Chile
    751.5×
  68. 67Swift CurrentSaskatchewan, Canada
    751.5×
  69. 67San Francisco De BorjaLima region, Peru
    751.5×
  70. 70Ulu BedokSingapore
    751.5×
  71. 70IndioCalifornia, United States
    751.5×
  72. 72NairobiNairobi County, Kenya
    751.5×
  73. 73ConcónValparaiso, Chile
    741.4×
  74. 74OsornoLos Lagos Region, Chile
    741.4×
  75. 75Puerto VarasLos Lagos Region, Chile
    741.4×
  76. 75Puerto MonttLos Lagos Region, Chile
    741.4×
  77. 75AricaArica y Parinacota Region, Chile
    741.4×
  78. 78La UniónLos Ríos Region, Chile
    731.4×
  79. 79AthensAttica, Greece
    721.4×
  80. 79St. AlbertAlberta, Canada
    721.4×
  81. 81AsprópyrgosAttica, Greece
    721.4×
  82. 82ZapopanJalisco, Mexico
    711.3×
  83. 83HuelvaAndalusia, Spain
    711.3×
  84. 83AlgecirasAndalusia, Spain
    711.3×
  85. 83Ciudad General EscobedoNuevo León, Mexico
    711.3×
  86. 86Karachilow-cost sensorsSindh, Pakistan
    711.3×
  87. 87CoronelBiobio, Chile
    701.3×
  88. 88San RoqueAndalusia, Spain
    701.3×
  89. 88NaplesCampania, Italy
    701.3×
  90. 88CuernavacaMorelos, Mexico
    701.3×
  91. 91Cluj-NapocaCluj County, Romania
    701.3×
  92. 92MiskolcBorsod-Abaúj-Zemplén, Hungary
    691.3×
  93. 92TalcahuanoBiobio, Chile
    691.3×
  94. 92Alto HospicioTarapacá, Chile
    691.3×
  95. 92Red DeerAlberta, Canada
    691.3×
  96. 96Viña del MarValparaiso, Chile
    691.3×
  97. 97Santa Anita - Los FicusLima region, Peru
    691.3×
  98. 98NagaiYamagata, Japan
    691.2×
  99. 99JesiThe Marches, Italy
    691.2×
  100. 100GuangzhouGuangdong, China
    681.2×
  101. 100Tula de AllendeHidalgo, Mexico
    681.2×
  102. 100Fort St. JohnBritish Columbia, Canada
    681.2×
  103. 103HyderabadTelangana, India
    681.2×
  104. 103Ang Mo Kio New TownSingapore
    681.2×
  105. 105TarnówLesser Poland, Poland
    681.2×
  106. 106BelgradeCentral Serbia, Serbia
    681.2×
  107. 106Santa CatarinaNuevo León, Mexico
    681.2×
  108. 108SuwałkiPodlasie, Poland
    671.2×
  109. 108Almatylow-cost sensorsAlmaty, Kazakhstan
    671.2×
  110. 110Los ÁngelesBiobio, Chile
    671.2×
  111. 111AbasoloGuanajuato, Mexico
    671.2×
  112. 112Tepeji del Río de OcampoHidalgo, Mexico
    671.2×
  113. 113LublinLublin, Poland
    661.1×
  114. 113TakasakiGunma, Japan
    661.1×
  115. 115ZamośćLublin, Poland
    651.1×
  116. 116TemucoAraucania, Chile
    651.1×
  117. 117LotaBiobio, Chile
    651.1×
  118. 118Nong KhaemBangkok, Thailand
    651.1×
  119. 118SliemaTas-Sliema, Malta
    651.1×
  120. 120AlgiersAlgiers, Algeria
    641.1×
  121. 121Saint JosephMissouri, United States
    641.1×
  122. 122ChiguayanteBiobio, Chile
    641.1×
  123. 123SzegedCsongrád, Hungary
    641.1×
  124. 124DieppeNormandy, France
    631.1×
  125. 124MontemurloTuscany, Italy
    631.1×
  126. 124McDonoughGeorgia, United States
    631.1×
  127. 127BangkokBangkok, Thailand
    631.0×
  128. 127Sherwood ParkAlberta, Canada
    631.0×
  129. 129NišCentral Serbia, Serbia
    631.0×
  130. 129Sainte-Geneviève-des-BoisÎle-de-France, France
    631.0×
  131. 131La Línea de la ConcepciónAndalusia, Spain
    631.0×
  132. 131San Pedro de la PazBiobio, Chile
    631.0×
  133. 133SofiaSofia-Capital, Bulgaria
    631.0×
  134. 133NiskoSubcarpathia, Poland
    631.0×
  135. 135NyíregyházaSzabolcs-Szatmár-Bereg, Hungary
    631.0×
  136. 135La Crescenta-Montroselow-cost sensorsCalifornia, United States
    631.0×
  137. 137HanoiHanoi, Vietnam
    621.0×
  138. 137StarnbergBavaria, Germany
    621.0×
  139. 137MonterreyNuevo León, Mexico
    621.0×
  140. 137Ciudad Benito JuárezNuevo León, Mexico
    621.0×
  141. 137Ciudad JuárezChihuahua, Mexico
    621.0×
  142. 142Abujalow-cost sensorsFCT, Nigeria
    621.0×
  143. 142CoquitlamBritish Columbia, Canada
    621.0×
  144. 144MielecSubcarpathia, Poland
    621.0×
  145. 144ToméBiobio, Chile
    621.0×
  146. 144Prince GeorgeBritish Columbia, Canada
    621.0×
  147. 147BirminghamAlabama, United States
    621.0×
  148. 147Santa ClaritaCalifornia, United States
    621.0×
  149. 149Baton RougeLouisiana, United States
    611.0×
  150. 149HobbsNew Mexico, United States
    611.0×
  151. 151ŻabbarĦaż-Żabbar, Malta
    611.0×
  152. 151León de los AldamaGuanajuato, Mexico
    611.0×
  153. 153CalamaAntofagasta, Chile
    611.0×
  154. 154MostaIl-Mosta, Malta
    611.0×
  155. 154SalernoCampania, Italy
    611.0×
  156. 156PiraeusAttica, Greece
    611.0×
  157. 156SalorTashkent Region, Uzbekistan
    611.0×
  158. 156Ferry PassFlorida, United States
    611.0×
  159. 159BucharestBucharest, Romania
    610.9×
  160. 159Bang KapiBangkok, Thailand
    610.9×
  161. 159SalamancaGuanajuato, Mexico
    610.9×
  162. 159FontanaCalifornia, United States
    610.9×
  163. 163AcharnésAttica, Greece
    600.9×
  164. 163VilniusVilnius, Lithuania
    600.9×
  165. 163Wan ChaiWan Chai, Hong Kong
    600.9×
  166. 166KhalándrionAttica, Greece
    600.9×
  167. 166RuseRuse, Bulgaria
    600.9×
  168. 166Kuala LumpurKuala Lumpur, Malaysia
    600.9×
  169. 166IrapuatoGuanajuato, Mexico
    600.9×
  170. 166Port ArthurTexas, United States
    600.9×
  171. 166CalexicoCalifornia, United States
    600.9×
  172. 172SakataYamagata, Japan
    600.9×
  173. 172SevillaAndalusia, Spain
    600.9×
  174. 172PardubicePardubice Region, Czechia
    600.9×
  175. 172GrossetoTuscany, Italy
    600.9×
  176. 172TurlockCalifornia, United States
    600.9×
  177. 177ThessaloníkiCentral Macedonia, Greece
    600.9×
  178. 177Kathmandulow-cost sensorsBagmati Province, Nepal
    600.9×
  179. 177SanoTochigi, Japan
    600.9×
  180. 177MunichBavaria, Germany
    600.9×
  181. 177Villa Poeta José Gálvez BarrenecheaLima region, Peru
    600.9×
  182. 182DurangoBasque Country, Spain
    600.9×
  183. 182TrentoTrentino-Alto Adige, Italy
    600.9×
  184. 182Banja LukaSrpska, Bosnia and Herzegovina
    600.9×
  185. 182HattiesburgMississippi, United States
    600.9×
  186. 182RiversideCalifornia, United States
    600.9×
  187. 187KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    590.9×
  188. 187PrzemyślSubcarpathia, Poland
    590.9×
  189. 187Queenstown Estatelow-cost sensorsSingapore
    590.9×
  190. 187RoveretoTrentino-Alto Adige, Italy
    590.9×
  191. 187TijuanaBaja California, Mexico
    590.9×
  192. 192Botevgradlow-cost sensorsSofia, Bulgaria
    590.9×
  193. 192KrosnoSubcarpathia, Poland
    590.9×
  194. 192Bang Bo DistrictSamut Prakan, Thailand
    590.9×
  195. 192RadomskoŁódź Voivodeship, Poland
    590.9×
  196. 192SulphurLouisiana, United States
    590.9×
  197. 197KiryūGunma, Japan
    590.9×
  198. 198Phra PradaengSamut Prakan, Thailand
    590.9×
  199. 198ValdiviaLos Ríos Region, Chile
    590.9×
  200. 200KasaokaOkayama, Japan
    590.9×

Top 200 of 1,871 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 14, 2023, smogrank.com/history/2023-09-14 (accessed 2 Oct 2026).

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