SmogRank / History / December 20, 2023

Most polluted cities on December 20, 2023

1,879 cities ranked by their average PM2.5 over the day; the worst was Sarajevo, Bosnia and Herzegovina, at 230.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during December 20, 2023. All episodes.

← Sarajevo 230.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for December 20, 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. 1SarajevoFederation of B&H, Bosnia and Herzegovina
    31015.3×
  2. 2Lahorelow-cost sensorsPunjab, Pakistan
    28714.1×
  3. 3Dhakalow-cost sensorsDhaka Division, Bangladesh
    23910.9×
  4. 4KolkataWest Bengal, India
    22910.3×
  5. 5N'DjamenaN’Djaména, Chad
    22710.1×
  6. 6DelhiDelhi, India
    2219.7×
  7. 7Banja LukaSrpska, Bosnia and Herzegovina
    2199.6×
  8. 8Ulan BatorUlaanbaatar, Mongolia
    2098.9×
  9. 9DushanbeDushanbe, Tajikistan
    2088.9×
  10. 10TetovoTetovo, North Macedonia
    2058.7×
  11. 11SalorTashkent Region, Uzbekistan
    2018.4×
  12. 12Abujalow-cost sensorsFCT, Nigeria
    2008.3×
  13. 13Islamabadlow-cost sensorsIslamabad, Pakistan
    1988.2×
  14. 14NišCentral Serbia, Serbia
    1978.0×
  15. 15HyderabadTelangana, India
    1897.3×
  16. 16Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1877.1×
  17. 17SkopjeGrad Skopje, North Macedonia
    1846.9×
  18. 18Kampalalow-cost sensorsCentral Region, Uganda
    1826.7×
  19. 19PristinaPristina, Kosovo
    1786.3×
  20. 20BelgradeCentral Serbia, Serbia
    1756.0×
  21. 21KavadarciKavadarci, North Macedonia
    1735.8×
  22. 22VelesVeles, North Macedonia
    1735.8×
  23. 23ChennaiTamil Nadu, India
    1685.3×
  24. 24Kathmandulow-cost sensorsBagmati Province, Nepal
    1655.1×
  25. 25Lagoslow-cost sensorsLagos, Nigeria
    1655.0×
  26. 26CapannoriTuscany, Italy
    1645.0×
  27. 27IlindenIlinden, North Macedonia
    1644.9×
  28. 28TlaquepaqueJalisco, Mexico
    1624.7×
  29. 29Karachilow-cost sensorsSindh, Pakistan
    1624.7×
  30. 30CairoCairo, Egypt
    1614.6×
  31. 31BeneventoCampania, Italy
    1584.4×
  32. 32MumbaiMaharashtra, India
    1584.3×
  33. 33BitolaBitola, North Macedonia
    1574.3×
  34. 34Novi SadVojvodina, Serbia
    1574.3×
  35. 35Haskovolow-cost sensorsHaskovo, Bulgaria
    1574.2×
  36. 36ManlleuCatalonia, Spain
    1564.2×
  37. 37Samut SakhonSamut Sakhon, Thailand
    1554.1×
  38. 38Botevgradlow-cost sensorsSofia, Bulgaria
    1523.8×
  39. 39HumennéPrešov Region, Slovakia
    1393.4×
  40. 40TurinPiedmont, Italy
    1393.4×
  41. 41VolosThessaly, Greece
    1373.3×
  42. 42San Salvador TizatlalliMéxico, Mexico
    1363.3×
  43. 43AlessandriaPiedmont, Italy
    1323.2×
  44. 44Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1293.1×
  45. 45NaplesCampania, Italy
    1293.1×
  46. 46CraiovaDolj, Romania
    1283.1×
  47. 47Ciudad Benito JuárezNuevo León, Mexico
    1283.1×
  48. 48SantiagoSantiago Metropolitan, Chile
    1273.1×
  49. 49DejCluj County, Romania
    1263.0×
  50. 50GrazStyria, Austria
    1253.0×
  51. 51MexicaliBaja California, Mexico
    1243.0×
  52. 52CholulaPuebla, Mexico
    1222.9×
  53. 53IaşiIași County, Romania
    1222.9×
  54. 54LleidaCatalonia, Spain
    1212.9×
  55. 55ZapopanJalisco, Mexico
    1162.8×
  56. 56SaltilloCoahuila, Mexico
    1152.7×
  57. 57ThessaloníkiCentral Macedonia, Greece
    1142.7×
  58. 58Mollet del VallèsCatalonia, Spain
    1122.7×
  59. 59San Francisco TlalcilalcalpanMéxico, Mexico
    1122.7×
  60. 60TolucaMéxico, Mexico
    1112.6×
  61. 61PécsBaranya, Hungary
    1112.6×
  62. 62PrievidzaTrenčín Region, Slovakia
    1102.6×
  63. 63Nakhon PathomNakhon Pathom, Thailand
    1092.6×
  64. 64Santa CatarinaNuevo León, Mexico
    1082.6×
  65. 65Cluj-NapocaCluj County, Romania
    1082.6×
  66. 65Zacatepec de HidalgoMorelos, Mexico
    1082.6×
  67. 67KochaniKochani, North Macedonia
    1072.5×
  68. 68RuseRuse, Bulgaria
    1042.5×
  69. 69Nong KhaemBangkok, Thailand
    1042.4×
  70. 70PartizánskeTrenčín Region, Slovakia
    1032.4×
  71. 71HanoiHanoi, Vietnam
    1002.3×
  72. 72CasertaCampania, Italy
    992.3×
  73. 73SzegedCsongrád, Hungary
    992.3×
  74. 73BailénAndalusia, Spain
    992.3×
  75. 75Mueang NonthaburiNonthaburi, Thailand
    992.3×
  76. 76AthensAttica, Greece
    972.3×
  77. 77AnconaThe Marches, Italy
    962.2×
  78. 78PátraWest Greece, Greece
    942.2×
  79. 78SevillaAndalusia, Spain
    942.2×
  80. 80Gabrovolow-cost sensorsGabrovo, Bulgaria
    932.1×
  81. 80Almatylow-cost sensorsAlmaty, Kazakhstan
    932.1×
  82. 82Falconara MarittimaThe Marches, Italy
    922.1×
  83. 83PueblaPuebla, Mexico
    922.1×
  84. 83Victoria de DurangoDurango, Mexico
    922.1×
  85. 85JesiThe Marches, Italy
    912.0×
  86. 86JakartaJakarta, Indonesia
    902.0×
  87. 87BucharestBucharest, Romania
    892.0×
  88. 88KigaliKigali, Rwanda
    892.0×
  89. 89NyíregyházaSzabolcs-Szatmár-Bereg, Hungary
    892.0×
  90. 90RužomberokŽilina Region, Slovakia
    881.9×
  91. 91OurenseGalicia, Spain
    881.9×
  92. 92IrapuatoGuanajuato, Mexico
    881.9×
  93. 93CelayaGuanajuato, Mexico
    881.9×
  94. 94San Martin Texmelucan de LabastidaPuebla, Mexico
    881.9×
  95. 95BangkokBangkok, Thailand
    861.9×
  96. 96MonacoMunicipality of Monaco, Monaco
    861.9×
  97. 96Ceglie MessapicaApulia, Italy
    861.9×
  98. 98Phra PradaengSamut Prakan, Thailand
    861.9×
  99. 99Samut PrakanSamut Prakan, Thailand
    851.8×
  100. 100Addis AbabaAddis Ababa, Ethiopia
    851.8×
  101. 100GyőrGyőr-Moson-Sopron, Hungary
    851.8×
  102. 102León de los AldamaGuanajuato, Mexico
    851.8×
  103. 103SallanchesAuvergne-Rhône-Alpes, France
    851.8×
  104. 104Khlong LuangPathum Thani, Thailand
    841.8×
  105. 105Banská BystricaBanská Bystrica Region, Slovakia
    841.8×
  106. 106BakuBaki, Azerbaijan
    831.8×
  107. 106CuernavacaMorelos, Mexico
    831.8×
  108. 108SalernoCampania, Italy
    831.8×
  109. 108Puente AltoSantiago Metropolitan, Chile
    831.8×
  110. 110YangonYangon, Myanmar
    831.8×
  111. 110AbasoloGuanajuato, Mexico
    831.8×
  112. 112Ciudad ApodacaNuevo León, Mexico
    831.7×
  113. 113EsztergomKomárom-Esztergom, Hungary
    821.7×
  114. 114KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    821.7×
  115. 115MiskolcBorsod-Abaúj-Zemplén, Hungary
    821.7×
  116. 115ToulonProvence-Alpes-Côte d'Azur, France
    821.7×
  117. 117AlbertvilleAuvergne-Rhône-Alpes, France
    811.7×
  118. 117SalamancaGuanajuato, Mexico
    811.7×
  119. 119MonterreyNuevo León, Mexico
    801.7×
  120. 120GivorsAuvergne-Rhône-Alpes, France
    801.6×
  121. 121Spišská Nová VesKošice Region, Slovakia
    801.6×
  122. 122ColomboWestern Province, Sri Lanka
    791.6×
  123. 122ZvolenBanská Bystrica Region, Slovakia
    791.6×
  124. 122MartinŽilina Region, Slovakia
    791.6×
  125. 122BrnoSouth Moravian, Czechia
    791.6×
  126. 122Silao de la VictoriaGuanajuato, Mexico
    791.6×
  127. 127ChikuseiIbaraki, Japan
    791.6×
  128. 128Vranov nad TopľouPrešov Region, Slovakia
    791.6×
  129. 128ŽideniceSouth Moravian, Czechia
    791.6×
  130. 130MillcreekUtah, United States
    791.6×
  131. 131ValdemoroMadrid, Spain
    781.6×
  132. 132GironaCatalonia, Spain
    781.6×
  133. 132TooeleUtah, United States
    781.6×
  134. 134AsprópyrgosAttica, Greece
    781.6×
  135. 135WolfsbergCarinthia, Austria
    771.6×
  136. 136OlomoucOlomouc Region, Czechia
    771.5×
  137. 136Jardines de la SillaNuevo León, Mexico
    771.5×
  138. 138Tuen MunTuen Mun, Hong Kong
    771.5×
  139. 139SofiaSofia-Capital, Bulgaria
    771.5×
  140. 140Ciudad General EscobedoNuevo León, Mexico
    771.5×
  141. 141CórdobaAndalusia, Spain
    761.5×
  142. 142MagnaUtah, United States
    761.5×
  143. 143Cadereyta JiménezNuevo León, Mexico
    751.5×
  144. 144YachimataChiba, Japan
    751.5×
  145. 145BolzanoTrentino-Alto Adige, Italy
    751.5×
  146. 146HualquiBiobio, Chile
    751.5×
  147. 147PřerovOlomouc Region, Czechia
    741.4×
  148. 147SulphurLouisiana, United States
    741.4×
  149. 149Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    741.4×
  150. 149Salt Lake CityUtah, United States
    741.4×
  151. 151La SpeziaLiguria, Italy
    741.4×
  152. 152Mixquiahuala de JuárezHidalgo, Mexico
    731.4×
  153. 153ZlínZlín, Czechia
    731.4×
  154. 153RengoO'Higgins Region, Chile
    731.4×
  155. 153CuranilahueBiobio, Chile
    731.4×
  156. 153San Luis PotosíSan Luis Potosí, Mexico
    731.4×
  157. 157TrentoTrentino-Alto Adige, Italy
    731.4×
  158. 158HandlováTrenčín Region, Slovakia
    731.4×
  159. 158Ciudad JuárezChihuahua, Mexico
    731.4×
  160. 160VeszprémVeszprém, Hungary
    731.4×
  161. 160TalaganteSantiago Metropolitan, Chile
    731.4×
  162. 160QuillotaValparaiso, Chile
    731.4×
  163. 163Ban Khlong PrawetBangkok, Thailand
    721.4×
  164. 163BarcelonaCatalonia, Spain
    721.4×
  165. 163QuinteroValparaiso, Chile
    721.4×
  166. 166CoyhaiqueAysén, Chile
    721.4×
  167. 167LyonAuvergne-Rhône-Alpes, France
    721.4×
  168. 168SninaPrešov Region, Slovakia
    711.3×
  169. 168CoronelBiobio, Chile
    711.3×
  170. 170YotsukaidōChiba, Japan
    711.3×
  171. 170ŽilinaŽilina Region, Slovakia
    711.3×
  172. 170Viña del MarValparaiso, Chile
    711.3×
  173. 170San CarlosÑuble, Chile
    711.3×
  174. 174Shimo-tsumaIbaraki, Japan
    711.3×
  175. 175TalcahuanoBiobio, Chile
    711.3×
  176. 175JōsōIbaraki, Japan
    711.3×
  177. 177NacimientoBiobio, Chile
    711.3×
  178. 177Misato, SaitamaSaitama, Japan
    711.3×
  179. 179PiraeusAttica, Greece
    701.3×
  180. 179ChambéryAuvergne-Rhône-Alpes, France
    701.3×
  181. 181RancaguaO'Higgins Region, Chile
    701.3×
  182. 182MeylanAuvergne-Rhône-Alpes, France
    701.3×
  183. 183Wan ChaiWan Chai, Hong Kong
    701.3×
  184. 183JaénAndalusia, Spain
    701.3×
  185. 183VeracruzVeracruz, Mexico
    701.3×
  186. 183ChillánÑuble, Chile
    701.3×
  187. 183TijuanaBaja California, Mexico
    701.3×
  188. 188PrešovPrešov Region, Slovakia
    701.3×
  189. 188FréjusProvence-Alpes-Côte d'Azur, France
    701.3×
  190. 188ToméBiobio, Chile
    701.3×
  191. 191TōganeChiba, Japan
    691.3×
  192. 191NakaIbaraki, Japan
    691.3×
  193. 191CoquimboCoquimbo Region, Chile
    691.3×
  194. 194MeyzieuAuvergne-Rhône-Alpes, France
    691.3×
  195. 195CuricóMaule Region, Chile
    691.3×
  196. 195LafayetteLouisiana, United States
    691.3×
  197. 195El CentroCalifornia, United States
    691.3×
  198. 195Rio RanchoNew Mexico, United States
    691.3×
  199. 199KennesawGeorgia, United States
    691.2×
  200. 200ChiguayanteBiobio, Chile
    691.2×

Top 200 of 1,879 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 20, 2023, smogrank.com/history/2023-12-20 (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.