SmogRank / History / December 2, 2023

Most polluted cities on December 2, 2023

1,713 cities ranked by their average PM2.5 over the day; the worst was Ulan Bator, Mongolia, at 190.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during December 2, 2023. All episodes.

← Ulan Bator 190.0 µg/m³ 150 µg/m³15 WHO 24-hour guideline
Every city ranked for December 2, 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. 1Ulan BatorUlaanbaatar, Mongolia
    26512.7×
  2. 2Lahorelow-cost sensorsPunjab, Pakistan
    24911.6×
  3. 2DelhiDelhi, India
    24911.6×
  4. 4N'DjamenaN’Djaména, Chad
    23310.5×
  5. 5SalorTashkent Region, Uzbekistan
    2028.5×
  6. 6Dhakalow-cost sensorsDhaka Division, Bangladesh
    1867.1×
  7. 7Karachilow-cost sensorsSindh, Pakistan
    1776.1×
  8. 8DushanbeDushanbe, Tajikistan
    1766.1×
  9. 9KolkataWest Bengal, India
    1766.0×
  10. 10Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1675.2×
  11. 11MumbaiMaharashtra, India
    1675.2×
  12. 12Ciudad Benito JuárezNuevo León, Mexico
    1624.8×
  13. 13HyderabadTelangana, India
    1624.7×
  14. 14TlaquepaqueJalisco, Mexico
    1584.4×
  15. 15BadgerAlaska, United States
    1574.2×
  16. 16Islamabadlow-cost sensorsIslamabad, Pakistan
    1544.0×
  17. 17KavadarciKavadarci, North Macedonia
    1503.7×
  18. 18CorkMunster, Ireland
    1453.6×
  19. 19Santa CatarinaNuevo León, Mexico
    1373.4×
  20. 20RuseRuse, Bulgaria
    1323.2×
  21. 21CraiovaDolj, Romania
    1303.1×
  22. 22CairoCairo, Egypt
    1273.1×
  23. 23Kathmandulow-cost sensorsBagmati Province, Nepal
    1222.9×
  24. 24IaşiIași County, Romania
    1182.8×
  25. 25MonterreyNuevo León, Mexico
    1172.8×
  26. 26CholulaPuebla, Mexico
    1152.7×
  27. 27Ciudad ApodacaNuevo León, Mexico
    1152.7×
  28. 28Sainte-Geneviève-des-BoisÎle-de-France, France
    1142.7×
  29. 29ThessaloníkiCentral Macedonia, Greece
    1132.7×
  30. 30JakartaJakarta, Indonesia
    1122.7×
  31. 31Samut SakhonSamut Sakhon, Thailand
    1112.6×
  32. 32KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    1112.6×
  33. 32Cadereyta JiménezNuevo León, Mexico
    1112.6×
  34. 34Ciudad General EscobedoNuevo León, Mexico
    1102.6×
  35. 35Tuen MunTuen Mun, Hong Kong
    1072.5×
  36. 36DejCluj County, Romania
    1062.5×
  37. 37OpavaMoravian-Silesian Region, Czechia
    1052.5×
  38. 38KigaliKigali, Rwanda
    1052.5×
  39. 39Abujalow-cost sensorsFCT, Nigeria
    1042.5×
  40. 40CalexicoCalifornia, United States
    1042.4×
  41. 41BensalemPennsylvania, United States
    1032.4×
  42. 42SkopjeGrad Skopje, North Macedonia
    1022.4×
  43. 43Spišská Nová VesKošice Region, Slovakia
    1012.4×
  44. 44OstravaMoravian-Silesian Region, Czechia
    992.3×
  45. 45Wan ChaiWan Chai, Hong Kong
    992.3×
  46. 46MexicaliBaja California, Mexico
    992.3×
  47. 47Tin Shui WaiYuen Long, Hong Kong
    982.3×
  48. 48LebanonPennsylvania, United States
    972.2×
  49. 49GuadalajaraJalisco, Mexico
    962.2×
  50. 50Frýdek-MístekMoravian-Silesian Region, Czechia
    962.2×
  51. 51Český TěšínMoravian-Silesian Region, Czechia
    962.2×
  52. 52ZapopanJalisco, Mexico
    952.2×
  53. 53LormontNew Aquitaine, France
    952.2×
  54. 54HavířovMoravian-Silesian Region, Czechia
    942.2×
  55. 54VeracruzVeracruz, Mexico
    942.2×
  56. 56TřinecMoravian-Silesian Region, Czechia
    942.1×
  57. 57CoulommiersÎle-de-France, France
    942.1×
  58. 58BucharestBucharest, Romania
    932.1×
  59. 59KlaipėdaKlaipėda County, Lithuania
    932.1×
  60. 60RouenNormandy, France
    922.1×
  61. 61TetovoTetovo, North Macedonia
    912.0×
  62. 61BohumínMoravian-Silesian Region, Czechia
    912.0×
  63. 61ClemmonsNorth Carolina, United States
    912.0×
  64. 61HarrisburgPennsylvania, United States
    912.0×
  65. 65Winston-SalemNorth Carolina, United States
    912.0×
  66. 66BakuBaki, Azerbaijan
    912.0×
  67. 67Tai PoTai Po, Hong Kong
    912.0×
  68. 68BeijingBeijing, China
    902.0×
  69. 69PristinaPristina, Kosovo
    902.0×
  70. 69AmiensHauts-de-France, France
    902.0×
  71. 71FanlingNorth District, Hong Kong
    902.0×
  72. 71WarringtonEngland, United Kingdom
    902.0×
  73. 73Joué-lès-ToursCentre-Val de Loire, France
    902.0×
  74. 73YorkPennsylvania, United States
    902.0×
  75. 73CarlislePennsylvania, United States
    902.0×
  76. 76Kwai ChungKwai Tsing District, Hong Kong
    902.0×
  77. 76BethlehemPennsylvania, United States
    902.0×
  78. 78Mong KokYau Tsim Mong District, Hong Kong
    902.0×
  79. 78ReadingPennsylvania, United States
    902.0×
  80. 80LancasterPennsylvania, United States
    892.0×
  81. 81Tsuen WanTsuen Wan, Hong Kong
    892.0×
  82. 82WiganEngland, United Kingdom
    892.0×
  83. 83Stoke-on-TrentEngland, United Kingdom
    892.0×
  84. 84GuangzhouGuangdong, China
    881.9×
  85. 85PoitiersNew Aquitaine, France
    881.9×
  86. 86ValenciennesHauts-de-France, France
    881.9×
  87. 86La Roche-sur-YonPays de la Loire, France
    881.9×
  88. 86Valašské MeziříčíZlín, Czechia
    881.9×
  89. 89KaunasKaunas, Lithuania
    881.9×
  90. 89RoubaixHauts-de-France, France
    881.9×
  91. 91ToursCentre-Val de Loire, France
    881.9×
  92. 91LouviersNormandy, France
    881.9×
  93. 91PhiladelphiaPennsylvania, United States
    881.9×
  94. 94LexingtonNorth Carolina, United States
    871.9×
  95. 95BristolEngland, United Kingdom
    871.9×
  96. 96BéthuneHauts-de-France, France
    871.9×
  97. 97Sham Shui PoSham Shui Po District, Hong Kong
    871.9×
  98. 98VictoriaCentral and Western, Hong Kong
    861.9×
  99. 98IzegemFlanders, Belgium
    861.9×
  100. 100AlbanyNew York, United States
    861.9×
  101. 101NantesPays de la Loire, France
    851.8×
  102. 101DouaiHauts-de-France, France
    851.8×
  103. 103Sau Mau PingKwun Tong District, Hong Kong
    851.8×
  104. 103DieppeNormandy, France
    851.8×
  105. 105MelunÎle-de-France, France
    841.8×
  106. 105TrentonNew Jersey, United States
    841.8×
  107. 107WaregemFlanders, Belgium
    841.8×
  108. 108SliemaTas-Sliema, Malta
    841.8×
  109. 109ÉvreuxNormandy, France
    831.8×
  110. 109Lexingtonlow-cost sensorsMassachusetts, United States
    831.8×
  111. 111Dún LaoghaireLeinster, Ireland
    831.8×
  112. 112AthensAttica, Greece
    831.8×
  113. 112DenainHauts-de-France, France
    831.8×
  114. 114MenenFlanders, Belgium
    831.7×
  115. 115EvergemFlanders, Belgium
    821.7×
  116. 116AntwerpFlanders, Belgium
    821.7×
  117. 116HickoryNorth Carolina, United States
    821.7×
  118. 118KortrijkFlanders, Belgium
    821.7×
  119. 118AllentownPennsylvania, United States
    821.7×
  120. 120Sha TinSha Tin, Hong Kong
    821.7×
  121. 120BloisCentre-Val de Loire, France
    821.7×
  122. 120AngersPays de la Loire, France
    821.7×
  123. 123ŻabbarĦaż-Żabbar, Malta
    811.7×
  124. 124LisieuxNormandy, France
    811.7×
  125. 125DunkirkHauts-de-France, France
    811.7×
  126. 125BordeauxNew Aquitaine, France
    811.7×
  127. 125Puerto VarasLos Lagos Region, Chile
    811.7×
  128. 128AsprópyrgosAttica, Greece
    811.7×
  129. 128GreensboroNorth Carolina, United States
    811.7×
  130. 130PennsaukenNew Jersey, United States
    811.7×
  131. 131BeverenFlanders, Belgium
    801.7×
  132. 131CreilHauts-de-France, France
    801.7×
  133. 131SarajevoFederation of B&H, Bosnia and Herzegovina
    801.7×
  134. 131New York CityNew York, United States
    801.7×
  135. 135LiberecLiberec Region, Czechia
    801.7×
  136. 135Puerto MonttLos Lagos Region, Chile
    801.7×
  137. 137LindenNew Jersey, United States
    801.6×
  138. 138MiskolcBorsod-Abaúj-Zemplén, Hungary
    801.6×
  139. 138StabroekFlanders, Belgium
    801.6×
  140. 138ParisÎle-de-France, France
    801.6×
  141. 138LilleHauts-de-France, France
    801.6×
  142. 142TroyesGrand Est, France
    801.6×
  143. 143ChâteaurouxCentre-Val de Loire, France
    791.6×
  144. 144ZwijndrechtFlanders, Belgium
    791.6×
  145. 144RoeselareFlanders, Belgium
    791.6×
  146. 144KapellenFlanders, Belgium
    791.6×
  147. 144La RochelleNew Aquitaine, France
    791.6×
  148. 148PueblaPuebla, Mexico
    791.6×
  149. 149TijuanaBaja California, Mexico
    791.6×
  150. 150Nakhon PathomNakhon Pathom, Thailand
    781.6×
  151. 150Saint-QuentinHauts-de-France, France
    781.6×
  152. 150CouëronPays de la Loire, France
    781.6×
  153. 150Puerto AysénAysén, Chile
    781.6×
  154. 154AngoulêmeNew Aquitaine, France
    781.6×
  155. 155GrimbergenFlanders, Belgium
    781.6×
  156. 156LensHauts-de-France, France
    781.6×
  157. 156FresnoCalifornia, United States
    781.6×
  158. 158PiraeusAttica, Greece
    771.6×
  159. 158Haskovolow-cost sensorsHaskovo, Bulgaria
    771.6×
  160. 158OurenseGalicia, Spain
    771.6×
  161. 158Victoria de DurangoDurango, Mexico
    771.6×
  162. 162Nong KhaemBangkok, Thailand
    771.5×
  163. 162San Francisco TlalcilalcalpanMéxico, Mexico
    771.5×
  164. 164BanbridgeNorthern Ireland, United Kingdom
    771.5×
  165. 164ChartresCentre-Val de Loire, France
    771.5×
  166. 164TolucaMéxico, Mexico
    771.5×
  167. 167CardiffWales, United Kingdom
    771.5×
  168. 167MonsWallonia, Belgium
    771.5×
  169. 167PřerovOlomouc Region, Czechia
    771.5×
  170. 170NottinghamEngland, United Kingdom
    761.5×
  171. 170LeedsEngland, United Kingdom
    761.5×
  172. 170GreenfieldMassachusetts, United States
    761.5×
  173. 170NorristownPennsylvania, United States
    761.5×
  174. 174ShenyangLiaoning, China
    761.5×
  175. 175WillebroekFlanders, Belgium
    761.5×
  176. 175RambouilletÎle-de-France, France
    761.5×
  177. 177Manchesterlow-cost sensorsEngland, United Kingdom
    761.5×
  178. 177TournaiWallonia, Belgium
    761.5×
  179. 177La UniónLos Ríos Region, Chile
    761.5×
  180. 180EwingNew Jersey, United States
    761.5×
  181. 181LochristiFlanders, Belgium
    751.5×
  182. 181AarschotFlanders, Belgium
    751.5×
  183. 181WilmingtonDelaware, United States
    751.5×
  184. 181ElizabethNew Jersey, United States
    751.5×
  185. 185DublinLeinster, Ireland
    751.5×
  186. 185DreuxCentre-Val de Loire, France
    751.5×
  187. 185ScrantonPennsylvania, United States
    751.5×
  188. 188YangonYangon, Myanmar
    751.5×
  189. 188CoyhaiqueAysén, Chile
    751.5×
  190. 190PraguePrague, Czechia
    751.5×
  191. 190OsornoLos Lagos Region, Chile
    751.5×
  192. 192FontainebleauÎle-de-France, France
    741.4×
  193. 193GentFlanders, Belgium
    741.4×
  194. 193České BudějoviceSouth Bohemian Region, Czechia
    741.4×
  195. 193Tepeji del Río de OcampoHidalgo, Mexico
    741.4×
  196. 193Silao de la VictoriaGuanajuato, Mexico
    741.4×
  197. 193Ciudad JuárezChihuahua, Mexico
    741.4×
  198. 198ZlínZlín, Czechia
    741.4×
  199. 199San Salvador TizatlalliMéxico, Mexico
    741.4×
  200. 200CharleroiWallonia, Belgium
    741.4×

Top 200 of 1,713 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, December 2, 2023, smogrank.com/history/2023-12-02 (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.