SmogRank / History / December 1, 2023

Most polluted cities on December 1, 2023

1,865 cities ranked by their average PM2.5 over the day; the worst was Delhi, India, at 233.0 µg/m³. Each city's own local calendar day.

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

← Delhi 233.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for December 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. 1DelhiDelhi, India
    31615.5×
  2. 2Ulan BatorUlaanbaatar, Mongolia
    27413.3×
  3. 3Lahorelow-cost sensorsPunjab, Pakistan
    2058.7×
  4. 4N'DjamenaN’Djaména, Chad
    1968.0×
  5. 5Dhakalow-cost sensorsDhaka Division, Bangladesh
    1967.9×
  6. 6DushanbeDushanbe, Tajikistan
    1927.6×
  7. 7SalorTashkent Region, Uzbekistan
    1796.3×
  8. 8MumbaiMaharashtra, India
    1766.1×
  9. 9BohumínMoravian-Silesian Region, Czechia
    1685.4×
  10. 10Český TěšínMoravian-Silesian Region, Czechia
    1655.1×
  11. 11Frýdek-MístekMoravian-Silesian Region, Czechia
    1655.0×
  12. 12HavířovMoravian-Silesian Region, Czechia
    1644.9×
  13. 13KolkataWest Bengal, India
    1614.7×
  14. 14OstravaMoravian-Silesian Region, Czechia
    1604.5×
  15. 15TřinecMoravian-Silesian Region, Czechia
    1594.4×
  16. 16SkopjeGrad Skopje, North Macedonia
    1584.4×
  17. 17OpavaMoravian-Silesian Region, Czechia
    1533.9×
  18. 18AlgiersAlgiers, Algeria
    1533.9×
  19. 19TetovoTetovo, North Macedonia
    1533.9×
  20. 20Valašské MeziříčíZlín, Czechia
    1533.9×
  21. 21Islamabadlow-cost sensorsIslamabad, Pakistan
    1523.8×
  22. 22BadgerAlaska, United States
    1513.7×
  23. 23Samut SakhonSamut Sakhon, Thailand
    1463.6×
  24. 24HyderabadTelangana, India
    1433.5×
  25. 25Ciudad Benito JuárezNuevo León, Mexico
    1423.5×
  26. 26Santa CatarinaNuevo León, Mexico
    1383.4×
  27. 27Kathmandulow-cost sensorsBagmati Province, Nepal
    1373.3×
  28. 28ZlínZlín, Czechia
    1353.3×
  29. 29IlindenIlinden, North Macedonia
    1353.3×
  30. 30KochaniKochani, North Macedonia
    1303.2×
  31. 31MaspalomasCanary Islands, Spain
    1293.1×
  32. 32RuseRuse, Bulgaria
    1283.1×
  33. 33CairoCairo, Egypt
    1273.1×
  34. 34ThessaloníkiCentral Macedonia, Greece
    1273.1×
  35. 35CraiovaDolj, Romania
    1263.0×
  36. 36Abujalow-cost sensorsFCT, Nigeria
    1243.0×
  37. 37Haskovolow-cost sensorsHaskovo, Bulgaria
    1233.0×
  38. 38PřerovOlomouc Region, Czechia
    1202.9×
  39. 39JakartaJakarta, Indonesia
    1192.9×
  40. 40TlaquepaqueJalisco, Mexico
    1172.8×
  41. 41KroměřížZlín, Czechia
    1152.7×
  42. 42PraguePrague, Czechia
    1152.7×
  43. 43Nakhon PathomNakhon Pathom, Thailand
    1102.6×
  44. 44KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    1102.6×
  45. 45LitvínovÚstí nad Labem Region, Czechia
    1092.6×
  46. 46JeddahMecca Region, Saudi Arabia
    1092.6×
  47. 47GuangzhouGuangdong, China
    1082.6×
  48. 47MostÚstí nad Labem Region, Czechia
    1082.6×
  49. 49BerounCentral Bohemia, Czechia
    1082.6×
  50. 50ŽilinaŽilina Region, Slovakia
    1072.5×
  51. 51Nong KhaemBangkok, Thailand
    1052.5×
  52. 52KavadarciKavadarci, North Macedonia
    1042.5×
  53. 52OlomoucOlomouc Region, Czechia
    1042.5×
  54. 52KadaňÚstí nad Labem Region, Czechia
    1042.5×
  55. 55Hradec KrálovéHradec Králové Region, Czechia
    1042.4×
  56. 56LiberecLiberec Region, Czechia
    1032.4×
  57. 57Mladá BoleslavCentral Bohemia, Czechia
    1022.4×
  58. 58Ciudad General EscobedoNuevo León, Mexico
    1012.4×
  59. 59PardubicePardubice Region, Czechia
    992.3×
  60. 60DěčínÚstí nad Labem Region, Czechia
    992.3×
  61. 61DunkirkHauts-de-France, France
    992.3×
  62. 62Wan ChaiWan Chai, Hong Kong
    972.3×
  63. 62TepliceÚstí nad Labem Region, Czechia
    972.3×
  64. 62MonterreyNuevo León, Mexico
    972.3×
  65. 65Şabāḩ as SālimMubārak al Kabīr, Kuwait
    972.3×
  66. 66RužomberokŽilina Region, Slovakia
    972.2×
  67. 67Tuen MunTuen Mun, Hong Kong
    962.2×
  68. 67MartinŽilina Region, Slovakia
    962.2×
  69. 69KigaliKigali, Rwanda
    962.2×
  70. 69ZnojmoSouth Moravian, Czechia
    962.2×
  71. 71Spišská Nová VesKošice Region, Slovakia
    962.2×
  72. 72ZvolenBanská Bystrica Region, Slovakia
    952.2×
  73. 73Banská BystricaBanská Bystrica Region, Slovakia
    952.2×
  74. 74DejCluj County, Romania
    942.2×
  75. 75Ciudad ApodacaNuevo León, Mexico
    942.1×
  76. 76RoeselareFlanders, Belgium
    932.1×
  77. 77ŽideniceSouth Moravian, Czechia
    922.1×
  78. 78BrnoSouth Moravian, Czechia
    922.1×
  79. 79Cluj-NapocaCluj County, Romania
    912.1×
  80. 80Ústí nad LabemÚstí nad Labem Region, Czechia
    912.0×
  81. 81SofiaSofia-Capital, Bulgaria
    912.0×
  82. 82PassauBavaria, Germany
    902.0×
  83. 83IzegemFlanders, Belgium
    902.0×
  84. 84EvergemFlanders, Belgium
    892.0×
  85. 84Jardines de la SillaNuevo León, Mexico
    892.0×
  86. 86KladnoCentral Bohemia, Czechia
    892.0×
  87. 87BensalemPennsylvania, United States
    892.0×
  88. 88MenenFlanders, Belgium
    881.9×
  89. 89TurinPiedmont, Italy
    881.9×
  90. 89MexicaliBaja California, Mexico
    881.9×
  91. 91WaregemFlanders, Belgium
    881.9×
  92. 92Tai PoTai Po, Hong Kong
    871.9×
  93. 93KortrijkFlanders, Belgium
    871.9×
  94. 93DouaiHauts-de-France, France
    871.9×
  95. 95BanbridgeNorthern Ireland, United Kingdom
    861.9×
  96. 95VeracruzVeracruz, Mexico
    861.9×
  97. 97DieppeNormandy, France
    861.9×
  98. 97HandlováTrenčín Region, Slovakia
    861.9×
  99. 99YangonYangon, Myanmar
    861.9×
  100. 100FanlingNorth District, Hong Kong
    851.8×
  101. 101Tin Shui WaiYuen Long, Hong Kong
    841.8×
  102. 102CorkMunster, Ireland
    841.8×
  103. 102SpartanburgSouth Carolina, United States
    841.8×
  104. 104Mueang NonthaburiNonthaburi, Thailand
    841.8×
  105. 104GrazStyria, Austria
    841.8×
  106. 104Frankfurt (Oder)Brandenburg, Germany
    841.8×
  107. 107AmiensHauts-de-France, France
    831.8×
  108. 108Tsuen WanTsuen Wan, Hong Kong
    831.8×
  109. 109MaldegemFlanders, Belgium
    831.8×
  110. 109LochristiFlanders, Belgium
    831.8×
  111. 109RoubaixHauts-de-France, France
    831.8×
  112. 109AlessandriaPiedmont, Italy
    831.8×
  113. 113RigaRiga, Latvia
    831.7×
  114. 113PristinaPristina, Kosovo
    831.7×
  115. 113WolfsbergCarinthia, Austria
    831.7×
  116. 116Cadereyta JiménezNuevo León, Mexico
    831.7×
  117. 117BangkokBangkok, Thailand
    821.7×
  118. 117Kwai ChungKwai Tsing District, Hong Kong
    821.7×
  119. 117KlosterneuburgLower Austria, Austria
    821.7×
  120. 117TrenčínTrenčín Region, Slovakia
    821.7×
  121. 121Sainte-Geneviève-des-BoisÎle-de-France, France
    821.7×
  122. 122PilsenPlzeň Region, Czechia
    821.7×
  123. 123AnsfeldenUpper Austria, Austria
    821.7×
  124. 123SallanchesAuvergne-Rhône-Alpes, France
    821.7×
  125. 125Mong KokYau Tsim Mong District, Hong Kong
    821.7×
  126. 126Khlong LuangPathum Thani, Thailand
    821.7×
  127. 126CottbusBrandenburg, Germany
    821.7×
  128. 128Dún LaoghaireLeinster, Ireland
    811.7×
  129. 128HarrisburgPennsylvania, United States
    811.7×
  130. 130KaunasKaunas, Lithuania
    811.7×
  131. 131Sham Shui PoSham Shui Po District, Hong Kong
    811.7×
  132. 131SliemaTas-Sliema, Malta
    811.7×
  133. 133Grande PrairieAlberta, Canada
    811.7×
  134. 134ShenyangLiaoning, China
    811.7×
  135. 135BeijingBeijing, China
    801.7×
  136. 135Sau Mau PingKwun Tong District, Hong Kong
    801.7×
  137. 137LouviersNormandy, France
    801.7×
  138. 137Žiar nad HronomBanská Bystrica Region, Slovakia
    801.7×
  139. 139TraunUpper Austria, Austria
    801.6×
  140. 139KoksijdeFlanders, Belgium
    801.6×
  141. 141AarschotFlanders, Belgium
    801.6×
  142. 141LilleHauts-de-France, France
    801.6×
  143. 143VictoriaCentral and Western, Hong Kong
    801.6×
  144. 144ValenciennesHauts-de-France, France
    801.6×
  145. 145GrimbergenFlanders, Belgium
    791.6×
  146. 145San Francisco TlalcilalcalpanMéxico, Mexico
    791.6×
  147. 147BéthuneHauts-de-France, France
    791.6×
  148. 148CreilHauts-de-France, France
    791.6×
  149. 149PrešovPrešov Region, Slovakia
    791.6×
  150. 149GapProvence-Alpes-Côte d'Azur, France
    791.6×
  151. 149DenainHauts-de-France, France
    791.6×
  152. 149PécsBaranya, Hungary
    791.6×
  153. 153GuadalajaraJalisco, Mexico
    791.6×
  154. 154PartizánskeTrenčín Region, Slovakia
    781.6×
  155. 154TolucaMéxico, Mexico
    781.6×
  156. 156GentFlanders, Belgium
    781.6×
  157. 157RouenNormandy, France
    781.6×
  158. 157LewistonIdaho, United States
    781.6×
  159. 159Sha TinSha Tin, Hong Kong
    771.6×
  160. 160AntwerpFlanders, Belgium
    771.5×
  161. 160České BudějoviceSouth Bohemian Region, Czechia
    771.5×
  162. 162BucharestBucharest, Romania
    771.5×
  163. 162CapannoriTuscany, Italy
    771.5×
  164. 162L'Ancienne-LoretteQuebec, Canada
    771.5×
  165. 165Sankt PöltenLower Austria, Austria
    771.5×
  166. 165KrefeldNorth Rhine-Westphalia, Germany
    771.5×
  167. 165ParisÎle-de-France, France
    771.5×
  168. 165Winston-SalemNorth Carolina, United States
    771.5×
  169. 169LebanonPennsylvania, United States
    771.5×
  170. 170BeverenFlanders, Belgium
    771.5×
  171. 170OurenseGalicia, Spain
    771.5×
  172. 172Addis AbabaAddis Ababa, Ethiopia
    761.5×
  173. 172SenicaTrnava Region, Slovakia
    761.5×
  174. 174DerryNorthern Ireland, United Kingdom
    761.5×
  175. 174GreenvilleSouth Carolina, United States
    761.5×
  176. 176MödlingLower Austria, Austria
    761.5×
  177. 176BergheimNorth Rhine-Westphalia, Germany
    761.5×
  178. 178IaşiIași County, Romania
    761.5×
  179. 178SpeyerRheinland-Pfalz, Germany
    761.5×
  180. 178PrievidzaTrenčín Region, Slovakia
    761.5×
  181. 181Bang Bo DistrictSamut Prakan, Thailand
    761.5×
  182. 181BadenLower Austria, Austria
    761.5×
  183. 181GreizThuringia, Germany
    761.5×
  184. 184RambouilletÎle-de-France, France
    751.5×
  185. 184MillcreekUtah, United States
    751.5×
  186. 186AntananarivoAnalamanga, Madagascar
    751.5×
  187. 186Puerto AysénAysén, Chile
    751.5×
  188. 188MiskolcBorsod-Abaúj-Zemplén, Hungary
    751.5×
  189. 188WillebroekFlanders, Belgium
    751.5×
  190. 190LinzUpper Austria, Austria
    751.5×
  191. 190EisenhüttenstadtBrandenburg, Germany
    751.5×
  192. 192WelsUpper Austria, Austria
    741.4×
  193. 192Klagenfurt am WörtherseeCarinthia, Austria
    741.4×
  194. 192LensHauts-de-France, France
    741.4×
  195. 192ÉvreuxNormandy, France
    741.4×
  196. 196ReadingPennsylvania, United States
    741.4×
  197. 197Phra PradaengSamut Prakan, Thailand
    741.4×
  198. 197ŻabbarĦaż-Żabbar, Malta
    741.4×
  199. 197ZwijndrechtFlanders, Belgium
    741.4×
  200. 200Saint-QuentinHauts-de-France, France
    741.4×

Top 200 of 1,865 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, December 1, 2023, smogrank.com/history/2023-12-01 (accessed 2 Oct 2026).

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