SmogRank / History / October 7, 2023

Most polluted cities on October 7, 2023

1,965 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 265.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during October 7, 2023. All episodes.

← N'Djamena 265.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for October 7, 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
    38017.7×
  2. 2Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1917.5×
  3. 3Puerto VarasLos Lagos Region, Chile
    1665.1×
  4. 4Lahorelow-cost sensorsPunjab, Pakistan
    1614.6×
  5. 4BamakoBamako, Mali
    1614.6×
  6. 6JakartaJakarta, Indonesia
    1594.4×
  7. 7HyderabadTelangana, India
    1574.3×
  8. 8DelhiDelhi, India
    1544.0×
  9. 9Islamabadlow-cost sensorsIslamabad, Pakistan
    1544.0×
  10. 10Dhakalow-cost sensorsDhaka Division, Bangladesh
    1533.9×
  11. 11CairoCairo, Egypt
    1393.4×
  12. 12KolkataWest Bengal, India
    1343.3×
  13. 13MaspalomasCanary Islands, Spain
    1212.9×
  14. 14TemucoAraucania, Chile
    1182.8×
  15. 15Puerto MonttLos Lagos Region, Chile
    1112.6×
  16. 16AgüimesCanary Islands, Spain
    1102.6×
  17. 17NacimientoBiobio, Chile
    1082.6×
  18. 18La UniónLos Ríos Region, Chile
    1052.5×
  19. 19IngenioCanary Islands, Spain
    1052.5×
  20. 20HanoiHanoi, Vietnam
    1042.4×
  21. 21BeijingBeijing, China
    1022.4×
  22. 22JeddahMecca Region, Saudi Arabia
    1012.4×
  23. 23ArrecifeCanary Islands, Spain
    992.3×
  24. 24Santa Anita - Los FicusLima region, Peru
    992.3×
  25. 25Kuala LumpurKuala Lumpur, Malaysia
    982.3×
  26. 26ShenyangLiaoning, China
    962.2×
  27. 27PristinaPristina, Kosovo
    952.2×
  28. 27ValdiviaLos Ríos Region, Chile
    952.2×
  29. 29MexicaliBaja California, Mexico
    932.1×
  30. 30Las Palmas de Gran CanariaCanary Islands, Spain
    922.1×
  31. 31Şabāḩ as SālimMubārak al Kabīr, Kuwait
    912.1×
  32. 31Santa Cruz de TenerifeCanary Islands, Spain
    912.1×
  33. 33AlessandriaPiedmont, Italy
    912.0×
  34. 34SalorTashkent Region, Uzbekistan
    902.0×
  35. 35SantiagoSantiago Metropolitan, Chile
    902.0×
  36. 36Karachilow-cost sensorsSindh, Pakistan
    902.0×
  37. 36SarajevoFederation of B&H, Bosnia and Herzegovina
    902.0×
  38. 38AstanaAstana, Kazakhstan
    881.9×
  39. 39OsornoLos Lagos Region, Chile
    881.9×
  40. 40ArucasCanary Islands, Spain
    871.9×
  41. 41Granadilla de AbonaCanary Islands, Spain
    851.8×
  42. 42MumbaiMaharashtra, India
    851.8×
  43. 43AntananarivoAnalamanga, Madagascar
    831.8×
  44. 44Mollet del VallèsCatalonia, Spain
    831.7×
  45. 45LimaLima Province, Peru
    831.7×
  46. 46Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    821.7×
  47. 47La OrotavaCanary Islands, Spain
    821.7×
  48. 48Kampalalow-cost sensorsCentral Region, Uganda
    811.7×
  49. 49Puente AltoSantiago Metropolitan, Chile
    801.7×
  50. 50CandelariaCanary Islands, Spain
    801.6×
  51. 51CuranilahueBiobio, Chile
    791.6×
  52. 52RancaguaO'Higgins Region, Chile
    791.6×
  53. 53TurinPiedmont, Italy
    781.6×
  54. 53TijuanaBaja California, Mexico
    781.6×
  55. 55San CarlosÑuble, Chile
    781.6×
  56. 56San IsidroCanary Islands, Spain
    771.5×
  57. 56AronaCanary Islands, Spain
    771.5×
  58. 56BarcelonaCatalonia, Spain
    771.5×
  59. 59ManlleuCatalonia, Spain
    761.5×
  60. 60HualquiBiobio, Chile
    751.5×
  61. 61QuillotaValparaiso, Chile
    751.5×
  62. 62FresnoCalifornia, United States
    751.5×
  63. 63TetovoTetovo, North Macedonia
    741.4×
  64. 64RengoO'Higgins Region, Chile
    741.4×
  65. 64CoronelBiobio, Chile
    741.4×
  66. 66Los ÁngelesBiobio, Chile
    731.4×
  67. 67ChillánÑuble, Chile
    731.4×
  68. 68BilbaoBasque Country, Spain
    731.4×
  69. 69AricaArica y Parinacota Region, Chile
    731.4×
  70. 70BakuBaki, Azerbaijan
    721.4×
  71. 70NaplesCampania, Italy
    721.4×
  72. 70TalcahuanoBiobio, Chile
    721.4×
  73. 70HanfordCalifornia, United States
    721.4×
  74. 74TalaganteSantiago Metropolitan, Chile
    721.4×
  75. 75TeldeCanary Islands, Spain
    711.3×
  76. 76ToméBiobio, Chile
    711.3×
  77. 77CoquimboCoquimbo Region, Chile
    711.3×
  78. 78DushanbeDushanbe, Tajikistan
    711.3×
  79. 78CallaoCallao, Peru
    711.3×
  80. 80Nong KhaemBangkok, Thailand
    701.3×
  81. 80TocopillaAntofagasta, Chile
    701.3×
  82. 82HuelvaAndalusia, Spain
    701.3×
  83. 83MontemurloTuscany, Italy
    701.3×
  84. 83QuinteroValparaiso, Chile
    701.3×
  85. 85Samut SakhonSamut Sakhon, Thailand
    691.3×
  86. 86San RoqueAndalusia, Spain
    691.3×
  87. 86Laudio / LlodioBasque Country, Spain
    691.3×
  88. 88ConcepciónBiobio, Chile
    691.3×
  89. 89Addis AbabaAddis Ababa, Ethiopia
    691.2×
  90. 89CuricóMaule Region, Chile
    691.2×
  91. 91Santa Cruz de la PalmaCanary Islands, Spain
    691.2×
  92. 92Puerto del RosarioCanary Islands, Spain
    681.2×
  93. 93ThessaloníkiCentral Macedonia, Greece
    681.2×
  94. 93SliemaTas-Sliema, Malta
    681.2×
  95. 93PratoTuscany, Italy
    681.2×
  96. 96LleidaCatalonia, Spain
    681.2×
  97. 96La SerenaCoquimbo Region, Chile
    681.2×
  98. 98LivornoTuscany, Italy
    681.2×
  99. 98CopiapóAtacama, Chile
    681.2×
  100. 98Villa Poeta José Gálvez BarrenecheaLima region, Peru
    681.2×
  101. 101BurrianaValencia, Spain
    681.2×
  102. 101Gasteiz / VitoriaBasque Country, Spain
    681.2×
  103. 103BelgradeCentral Serbia, Serbia
    671.2×
  104. 104BitolaBitola, North Macedonia
    671.2×
  105. 104LisbonLisbon, Portugal
    671.2×
  106. 106FujinomiyaShizuoka, Japan
    671.2×
  107. 106CapannoriTuscany, Italy
    671.2×
  108. 108NišCentral Serbia, Serbia
    661.2×
  109. 108San Francisco TlalcilalcalpanMéxico, Mexico
    661.2×
  110. 108Puerto AysénAysén, Chile
    661.2×
  111. 111AmoraSetúbal, Portugal
    661.1×
  112. 111KonstanzBaden-Wurttemberg, Germany
    661.1×
  113. 111Alcalá de HenaresMadrid, Spain
    661.1×
  114. 111MaderaCalifornia, United States
    661.1×
  115. 111MantecaCalifornia, United States
    661.1×
  116. 116CoyhaiqueAysén, Chile
    661.1×
  117. 116TurlockCalifornia, United States
    661.1×
  118. 118PátraWest Greece, Greece
    661.1×
  119. 118CalexicoCalifornia, United States
    661.1×
  120. 120La Línea de la ConcepciónAndalusia, Spain
    661.1×
  121. 120PisaTuscany, Italy
    661.1×
  122. 120CauquenesMaule Region, Chile
    661.1×
  123. 123ViareggioTuscany, Italy
    651.1×
  124. 124SalamancaGuanajuato, Mexico
    651.1×
  125. 125SkopjeGrad Skopje, North Macedonia
    651.1×
  126. 125HonmachiKumamoto, Japan
    651.1×
  127. 125ChiguayanteBiobio, Chile
    651.1×
  128. 128Viña del MarValparaiso, Chile
    651.1×
  129. 128Alto HospicioTarapacá, Chile
    651.1×
  130. 130AsprópyrgosAttica, Greece
    641.1×
  131. 130La SpeziaLiguria, Italy
    641.1×
  132. 132AthensAttica, Greece
    641.1×
  133. 132FlorenceTuscany, Italy
    641.1×
  134. 134Los AngelesCalifornia, United States
    641.1×
  135. 135ValdemoroMadrid, Spain
    641.1×
  136. 135San Mateo AtencoMéxico, Mexico
    641.1×
  137. 135ModestoCalifornia, United States
    641.1×
  138. 138MurciaMurcia, Spain
    641.1×
  139. 138ConcónValparaiso, Chile
    641.1×
  140. 138CorcoranCalifornia, United States
    641.1×
  141. 141AcharnésAttica, Greece
    631.1×
  142. 141VisaliaCalifornia, United States
    631.1×
  143. 143SendaiKagoshima, Japan
    631.0×
  144. 143MostaIl-Mosta, Malta
    631.0×
  145. 145MinamataKumamoto, Japan
    631.0×
  146. 145Kaseda-shirakameKagoshima, Japan
    631.0×
  147. 145CalamaAntofagasta, Chile
    631.0×
  148. 145Ciudad Benito JuárezNuevo León, Mexico
    631.0×
  149. 149DurangoBasque Country, Spain
    631.0×
  150. 149QuilpuéValparaiso, Chile
    631.0×
  151. 151SevillaAndalusia, Spain
    631.0×
  152. 151LotaBiobio, Chile
    631.0×
  153. 151San Pedro de la PazBiobio, Chile
    631.0×
  154. 154MóstolesMadrid, Spain
    621.0×
  155. 154SalernoCampania, Italy
    621.0×
  156. 154GrossetoTuscany, Italy
    621.0×
  157. 157NairobiNairobi County, Kenya
    621.0×
  158. 157ŽideniceSouth Moravian, Czechia
    621.0×
  159. 157MassaTuscany, Italy
    621.0×
  160. 160OviedoAsturias, Spain
    621.0×
  161. 160Falconara MarittimaThe Marches, Italy
    621.0×
  162. 162FriedrichshafenBaden-Wurttemberg, Germany
    621.0×
  163. 162ValladolidCastille and León, Spain
    621.0×
  164. 162Jurupa ValleyCalifornia, United States
    621.0×
  165. 162San Salvador TizatlalliMéxico, Mexico
    621.0×
  166. 166HumennéPrešov Region, Slovakia
    621.0×
  167. 166GroßostheimBavaria, Germany
    621.0×
  168. 166Dún LaoghaireLeinster, Ireland
    621.0×
  169. 166TalcaMaule Region, Chile
    621.0×
  170. 170BucharestBucharest, Romania
    611.0×
  171. 170BangkokBangkok, Thailand
    611.0×
  172. 170GuangzhouGuangdong, China
    611.0×
  173. 170CórdobaAndalusia, Spain
    611.0×
  174. 170TolucaMéxico, Mexico
    611.0×
  175. 170ZapopanJalisco, Mexico
    611.0×
  176. 170MercedCalifornia, United States
    611.0×
  177. 177ŻabbarĦaż-Żabbar, Malta
    611.0×
  178. 177Collado-VillalbaMadrid, Spain
    611.0×
  179. 179KakegawaShizuoka, Japan
    611.0×
  180. 179CuencaCastille-La Mancha, Spain
    611.0×
  181. 179LinaresMaule Region, Chile
    611.0×
  182. 182Sainte-Geneviève-des-BoisÎle-de-France, France
    611.0×
  183. 182ClovisCalifornia, United States
    611.0×
  184. 182RoseburgOregon, United States
    611.0×
  185. 185KhalándrionAttica, Greece
    610.9×
  186. 185RuseRuse, Bulgaria
    610.9×
  187. 185GironaCatalonia, Spain
    610.9×
  188. 188KagoshimaKagoshima, Japan
    600.9×
  189. 188PalenciaCastille and León, Spain
    600.9×
  190. 188Cadereyta JiménezNuevo León, Mexico
    600.9×
  191. 188GuadalajaraJalisco, Mexico
    600.9×
  192. 188StocktonCalifornia, United States
    600.9×
  193. 193Almatylow-cost sensorsAlmaty, Kazakhstan
    600.9×
  194. 193GardanneProvence-Alpes-Côte d'Azur, France
    600.9×
  195. 193Vilanova i la GeltrúCatalonia, Spain
    600.9×
  196. 193Donostia / San SebastiánBasque Country, Spain
    600.9×
  197. 193TrentoTrentino-Alto Adige, Italy
    600.9×
  198. 193PesaroThe Marches, Italy
    600.9×
  199. 193ArezzoTuscany, Italy
    600.9×
  200. 193Banja LukaSrpska, Bosnia and Herzegovina
    600.9×

Top 200 of 1,965 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

Use this board

SmogRank, most polluted cities, PM2.5, October 7, 2023, smogrank.com/history/2023-10-07 (accessed 2 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.