SmogRank / History / January 23, 2023

Most polluted cities on January 23, 2023

1,094 cities ranked by their average PM2.5 over the day; the worst was Gómez Palacio, Mexico, at 510.5 µg/m³. Each city's own local calendar day.

Bad-air episodes during January 23, 2023. All episodes.

← Gómez Palacio 510.5 µg/m³ 500 µg/m³15 WHO 24-hour guideline
Every city ranked for January 23, 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. 1Gómez PalacioDurango, Mexico
    500+34.0×
  2. 2San Luis PotosíSan Luis Potosí, Mexico
    500+32.9×
  3. 3DushanbeDushanbe, Tajikistan
    35016.7×
  4. 4SalorTashkent Region, Uzbekistan
    23510.7×
  5. 5DelhiDelhi, India
    2119.1×
  6. 6Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    1998.3×
  7. 7Islamabadlow-cost sensorsIslamabad, Pakistan
    1897.3×
  8. 8N'DjamenaN’Djaména, Chad
    1846.8×
  9. 9Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1776.2×
  10. 10BamakoBamako, Mali
    1756.0×
  11. 11Lahorelow-cost sensorsPunjab, Pakistan
    1755.9×
  12. 12Abujalow-cost sensorsFCT, Nigeria
    1735.8×
  13. 13AlexandriaAlexandria, Egypt
    1695.4×
  14. 14BaghdadBaghdad, Iraq
    1655.0×
  15. 14HyderabadTelangana, India
    1655.0×
  16. 16KigaliKigali, Rwanda
    1644.9×
  17. 17Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1564.2×
  18. 18Kathmandulow-cost sensorsBagmati Province, Nepal
    1523.8×
  19. 19Banja LukaSrpska, Bosnia and Herzegovina
    1323.2×
  20. 20Hacienda Santa FeJalisco, Mexico
    1303.1×
  21. 21San Francisco TlalcilalcalpanMéxico, Mexico
    1283.1×
  22. 22ReadingEngland, United Kingdom
    1263.0×
  23. 23BloemfonteinFree State, South Africa
    1253.0×
  24. 24HayesEngland, United Kingdom
    1233.0×
  25. 25AmmanAmman, Jordan
    1192.9×
  26. 25Karachilow-cost sensorsSindh, Pakistan
    1192.9×
  27. 27Spišská Nová VesKošice Region, Slovakia
    1172.8×
  28. 28LeedsEngland, United Kingdom
    1072.5×
  29. 29Accralow-cost sensorsGreater Accra, Ghana
    1072.5×
  30. 30TlaquepaqueJalisco, Mexico
    1062.5×
  31. 31TijuanaBaja California, Mexico
    1052.5×
  32. 32KhartoumKhartoum, Sudan
    1042.5×
  33. 33PueblaPuebla, Mexico
    992.3×
  34. 34Zielona GóraLubusz, Poland
    992.3×
  35. 35LondonEngland, United Kingdom
    992.3×
  36. 36RacibórzSilesia, Poland
    992.3×
  37. 36TolucaMéxico, Mexico
    992.3×
  38. 38Jastrzębie ZdrójSilesia, Poland
    982.3×
  39. 38CelayaGuanajuato, Mexico
    982.3×
  40. 40RužomberokŽilina Region, Slovakia
    972.3×
  41. 41ŁaskŁódź Voivodeship, Poland
    972.3×
  42. 42WrocławLower Silesia, Poland
    972.3×
  43. 43SzamotułyGreater Poland, Poland
    962.2×
  44. 44ŻyrardówMazovia, Poland
    952.2×
  45. 45ParedesPorto, Portugal
    952.2×
  46. 46XonacatlánMéxico, Mexico
    942.2×
  47. 47ZapopanJalisco, Mexico
    942.1×
  48. 48BexleyEngland, United Kingdom
    942.1×
  49. 49CholulaPuebla, Mexico
    932.1×
  50. 50AshgabatAshgabat, Turkmenistan
    932.1×
  51. 50NacimientoBiobio, Chile
    932.1×
  52. 52RzeszówSubcarpathia, Poland
    932.1×
  53. 53ŽilinaŽilina Region, Slovakia
    922.1×
  54. 53San Mateo AtencoMéxico, Mexico
    922.1×
  55. 55KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    922.1×
  56. 55TocopillaAntofagasta, Chile
    922.1×
  57. 57SouthamptonEngland, United Kingdom
    922.1×
  58. 58SallanchesAuvergne-Rhône-Alpes, France
    912.0×
  59. 59IrapuatoGuanajuato, Mexico
    912.0×
  60. 60MinatitlánVeracruz, Mexico
    892.0×
  61. 61Villa Poeta José Gálvez BarrenecheaLima region, Peru
    892.0×
  62. 62LublinLublin, Poland
    881.9×
  63. 63AlessandriaPiedmont, Italy
    871.9×
  64. 63LimaLima Province, Peru
    871.9×
  65. 65ColomboWestern Province, Sri Lanka
    861.9×
  66. 66DouaiHauts-de-France, France
    861.9×
  67. 66La CrosseWisconsin, United States
    861.9×
  68. 68TarnówLesser Poland, Poland
    851.8×
  69. 69Botevgradlow-cost sensorsSofia, Bulgaria
    851.8×
  70. 69JarosławSubcarpathia, Poland
    851.8×
  71. 71PristinaPristina, Kosovo
    841.8×
  72. 72MonacoMunicipality of Monaco, Monaco
    841.8×
  73. 73Bielsko-BialaSilesia, Poland
    841.8×
  74. 73MexicaliBaja California, Mexico
    841.8×
  75. 75BéthuneHauts-de-France, France
    831.8×
  76. 76Cluj-NapocaCluj County, Romania
    831.8×
  77. 77RadomMazovia, Poland
    831.7×
  78. 77FresnoCalifornia, United States
    831.7×
  79. 79LilleHauts-de-France, France
    831.7×
  80. 80ValenciennesHauts-de-France, France
    821.7×
  81. 81PauNew Aquitaine, France
    821.7×
  82. 82OxfordEngland, United Kingdom
    821.7×
  83. 82SalamancaGuanajuato, Mexico
    821.7×
  84. 84OstravaMoravian-Silesian Region, Czechia
    811.7×
  85. 85PoznańGreater Poland, Poland
    811.7×
  86. 86PułtuskMazovia, Poland
    811.7×
  87. 86TurinPiedmont, Italy
    811.7×
  88. 86San Salvador TizatlalliMéxico, Mexico
    811.7×
  89. 89HavířovMoravian-Silesian Region, Czechia
    801.7×
  90. 89Jelenia GóraLower Silesia, Poland
    801.7×
  91. 91OtwockMazovia, Poland
    801.6×
  92. 92ChesterfieldEngland, United Kingdom
    801.6×
  93. 92KrapkowiceOpole Voivodeship, Poland
    801.6×
  94. 94Tepeji del Río de OcampoHidalgo, Mexico
    801.6×
  95. 95BitolaBitola, North Macedonia
    791.6×
  96. 95NottinghamEngland, United Kingdom
    791.6×
  97. 95RoubaixHauts-de-France, France
    791.6×
  98. 98ToruńKujawsko-Pomorskie, Poland
    791.6×
  99. 98KutnoŁódź Voivodeship, Poland
    791.6×
  100. 100SiedlceMazovia, Poland
    791.6×
  101. 101SheffieldEngland, United Kingdom
    791.6×
  102. 102Český TěšínMoravian-Silesian Region, Czechia
    781.6×
  103. 102DrammenBuskerud, Norway
    781.6×
  104. 104Stoke-on-TrentEngland, United Kingdom
    781.6×
  105. 104KatowiceSilesia, Poland
    781.6×
  106. 106MielecSubcarpathia, Poland
    781.6×
  107. 106DagenhamEngland, United Kingdom
    781.6×
  108. 108BohumínMoravian-Silesian Region, Czechia
    771.6×
  109. 109Gabrovolow-cost sensorsGabrovo, Bulgaria
    771.5×
  110. 109Zacatepec de HidalgoMorelos, Mexico
    771.5×
  111. 109SantiagoSantiago Metropolitan, Chile
    771.5×
  112. 112WarsawMazovia, Poland
    771.5×
  113. 112TalaganteSantiago Metropolitan, Chile
    771.5×
  114. 114RancaguaO'Higgins Region, Chile
    771.5×
  115. 115PátraWest Greece, Greece
    761.5×
  116. 115Viña del MarValparaiso, Chile
    761.5×
  117. 117Puente AltoSantiago Metropolitan, Chile
    761.5×
  118. 118ŁukówLublin, Poland
    761.5×
  119. 118YorkEngland, United Kingdom
    761.5×
  120. 120BrightonEngland, United Kingdom
    761.5×
  121. 121WłocławekKujawsko-Pomorskie, Poland
    751.5×
  122. 121OpoleOpole Voivodeship, Poland
    751.5×
  123. 123WiganEngland, United Kingdom
    751.5×
  124. 123DaxNew Aquitaine, France
    751.5×
  125. 123PłockMazovia, Poland
    751.5×
  126. 123Naucalpan de JuárezMéxico, Mexico
    751.5×
  127. 127Saint-QuentinHauts-de-France, France
    751.5×
  128. 127KrakówLesser Poland, Poland
    751.5×
  129. 127QuinteroValparaiso, Chile
    751.5×
  130. 127QuillotaValparaiso, Chile
    751.5×
  131. 131Birminghamlow-cost sensorsEngland, United Kingdom
    751.5×
  132. 131LisieuxNormandy, France
    751.5×
  133. 131Valašské MeziříčíZlín, Czechia
    751.5×
  134. 131MercedCalifornia, United States
    751.5×
  135. 135WarringtonEngland, United Kingdom
    741.4×
  136. 135Manchesterlow-cost sensorsEngland, United Kingdom
    741.4×
  137. 137SpekeEngland, United Kingdom
    741.4×
  138. 137Frýdek-MístekMoravian-Silesian Region, Czechia
    741.4×
  139. 139RouenNormandy, France
    741.4×
  140. 140MiędzyrzeczLubusz, Poland
    741.4×
  141. 141Kędzierzyn-KoźleOpole Voivodeship, Poland
    741.4×
  142. 141GuadalajaraJalisco, Mexico
    741.4×
  143. 143ConcónValparaiso, Chile
    741.4×
  144. 144LiverpoolEngland, United Kingdom
    731.4×
  145. 145ThorntonColorado, United States
    731.4×
  146. 146WawerMazovia, Poland
    731.4×
  147. 146StarachowiceŚwiętokrzyskie, Poland
    731.4×
  148. 148San Andrés TuxtlaVeracruz, Mexico
    721.4×
  149. 148Canvey IslandEngland, United Kingdom
    721.4×
  150. 150KościerzynaPomerania, Poland
    721.4×
  151. 151PrzemyślSubcarpathia, Poland
    721.4×
  152. 151NewmarketEngland, United Kingdom
    721.4×
  153. 151TalcaMaule Region, Chile
    721.4×
  154. 151MaderaCalifornia, United States
    721.4×
  155. 155České BudějoviceSouth Bohemian Region, Czechia
    721.3×
  156. 156CoatzacoalcosVeracruz, Mexico
    711.3×
  157. 156HualpénBiobio, Chile
    711.3×
  158. 156Santa CatarinaNuevo León, Mexico
    711.3×
  159. 156VisaliaCalifornia, United States
    711.3×
  160. 160AricaArica y Parinacota Region, Chile
    711.3×
  161. 161ParisÎle-de-France, France
    711.3×
  162. 162HanfordCalifornia, United States
    701.3×
  163. 163NairobiNairobi County, Kenya
    701.3×
  164. 163NiskoSubcarpathia, Poland
    701.3×
  165. 163LorientBrittany, France
    701.3×
  166. 166BeauvaisHauts-de-France, France
    701.3×
  167. 166HamarInnlandet, Norway
    701.3×
  168. 168ToulouseOccitanie, France
    701.3×
  169. 168GyőrGyőr-Moson-Sopron, Hungary
    701.3×
  170. 170Royal Leamington SpaEngland, United Kingdom
    701.3×
  171. 170IrlamEngland, United Kingdom
    701.3×
  172. 170MarseilleProvence-Alpes-Côte d'Azur, France
    701.3×
  173. 170LourdesOccitanie, France
    701.3×
  174. 174Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    691.3×
  175. 174MiddlesbroughEngland, United Kingdom
    691.3×
  176. 174RengoO'Higgins Region, Chile
    691.3×
  177. 177KłodzkoLower Silesia, Poland
    691.3×
  178. 178LinaresMaule Region, Chile
    691.3×
  179. 179JasłoSubcarpathia, Poland
    691.2×
  180. 179RennesBrittany, France
    691.2×
  181. 181BakuBaki, Azerbaijan
    691.2×
  182. 181Le HavreNormandy, France
    691.2×
  183. 181ChambéryAuvergne-Rhône-Alpes, France
    691.2×
  184. 181BordeauxNew Aquitaine, France
    691.2×
  185. 181EsztergomKomárom-Esztergom, Hungary
    691.2×
  186. 181ŻaryLubusz, Poland
    691.2×
  187. 181AntofagastaAntofagasta, Chile
    691.2×
  188. 188EindhovenNorth Brabant, The Netherlands
    691.2×
  189. 188VannesBrittany, France
    691.2×
  190. 188AmiensHauts-de-France, France
    691.2×
  191. 188CuricóMaule Region, Chile
    691.2×
  192. 192AsprópyrgosAttica, Greece
    681.2×
  193. 192Addis AbabaAddis Ababa, Ethiopia
    681.2×
  194. 192SliemaTas-Sliema, Malta
    681.2×
  195. 192RambouilletÎle-de-France, France
    681.2×
  196. 196DerryNorthern Ireland, United Kingdom
    681.2×
  197. 196BratislavaBratislava Region, Slovakia
    681.2×
  198. 196Ciudad NezahualcoyotlMéxico, Mexico
    681.2×
  199. 199SenicaTrnava Region, Slovakia
    681.2×
  200. 199TalcahuanoBiobio, Chile
    681.2×

Top 200 of 1,094 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, January 23, 2023, smogrank.com/history/2023-01-23 (accessed 2 Oct 2026).

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