SmogRank / History / December 17, 2023

Most polluted cities on December 17, 2023

1,815 cities ranked by their average PM2.5 over the day; the worst was Kolkata, India, at 205.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during December 17, 2023. All episodes.

← Kolkata 205.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for December 17, 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. 1KolkataWest Bengal, India
    28013.7×
  2. 2DelhiDelhi, India
    27813.5×
  3. 3Dhakalow-cost sensorsDhaka Division, Bangladesh
    26612.7×
  4. 4Lahorelow-cost sensorsPunjab, Pakistan
    26512.7×
  5. 5Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    25011.7×
  6. 6Almatylow-cost sensorsAlmaty, Kazakhstan
    2209.7×
  7. 7Lagoslow-cost sensorsLagos, Nigeria
    2038.5×
  8. 8DushanbeDushanbe, Tajikistan
    2008.3×
  9. 9Karachilow-cost sensorsSindh, Pakistan
    1998.3×
  10. 10Banja LukaSrpska, Bosnia and Herzegovina
    1917.5×
  11. 11Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    1907.4×
  12. 11Ulan BatorUlaanbaatar, Mongolia
    1907.4×
  13. 13Ciudad Benito JuárezNuevo León, Mexico
    1867.1×
  14. 14HyderabadTelangana, India
    1786.3×
  15. 15CairoCairo, Egypt
    1745.9×
  16. 16Islamabadlow-cost sensorsIslamabad, Pakistan
    1715.6×
  17. 17Victoria de DurangoDurango, Mexico
    1644.9×
  18. 18SarajevoFederation of B&H, Bosnia and Herzegovina
    1634.8×
  19. 19Samut SakhonSamut Sakhon, Thailand
    1624.7×
  20. 20MumbaiMaharashtra, India
    1624.7×
  21. 21Kathmandulow-cost sensorsBagmati Province, Nepal
    1584.4×
  22. 22N'DjamenaN’Djaména, Chad
    1574.3×
  23. 23DejCluj County, Romania
    1564.2×
  24. 24Spišská Nová VesKošice Region, Slovakia
    1554.1×
  25. 25BakersfieldCalifornia, United States
    1533.9×
  26. 26MiskolcBorsod-Abaúj-Zemplén, Hungary
    1513.7×
  27. 27SallanchesAuvergne-Rhône-Alpes, France
    1493.7×
  28. 28NišCentral Serbia, Serbia
    1483.6×
  29. 29Kampalalow-cost sensorsCentral Region, Uganda
    1473.6×
  30. 30HanfordCalifornia, United States
    1463.6×
  31. 31BelgradeCentral Serbia, Serbia
    1443.5×
  32. 32ManlleuCatalonia, Spain
    1393.4×
  33. 33KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    1383.4×
  34. 34TlaquepaqueJalisco, Mexico
    1363.3×
  35. 35Abujalow-cost sensorsFCT, Nigeria
    1343.3×
  36. 36Santa Cruz de TenerifeCanary Islands, Spain
    1343.3×
  37. 37CapannoriTuscany, Italy
    1313.2×
  38. 38FresnoCalifornia, United States
    1283.1×
  39. 39TurinPiedmont, Italy
    1283.1×
  40. 40ReddingCalifornia, United States
    1273.1×
  41. 41La OrotavaCanary Islands, Spain
    1222.9×
  42. 42Las Palmas de Gran CanariaCanary Islands, Spain
    1212.9×
  43. 43ModestoCalifornia, United States
    1202.9×
  44. 44AlessandriaPiedmont, Italy
    1202.9×
  45. 45KošiceKošice Region, Slovakia
    1152.8×
  46. 46Nong KhaemBangkok, Thailand
    1152.7×
  47. 47MonterreyNuevo León, Mexico
    1152.7×
  48. 48Nakhon PathomNakhon Pathom, Thailand
    1142.7×
  49. 49ChennaiTamil Nadu, India
    1122.7×
  50. 50StocktonCalifornia, United States
    1112.6×
  51. 51VelesVeles, North Macedonia
    1112.6×
  52. 52PrievidzaTrenčín Region, Slovakia
    1092.6×
  53. 53Ciudad General EscobedoNuevo León, Mexico
    1082.6×
  54. 54MantecaCalifornia, United States
    1072.5×
  55. 55ArrecifeCanary Islands, Spain
    1072.5×
  56. 56San IsidroCanary Islands, Spain
    1052.5×
  57. 56TurlockCalifornia, United States
    1052.5×
  58. 58Banská BystricaBanská Bystrica Region, Slovakia
    1042.4×
  59. 59VisaliaCalifornia, United States
    1032.4×
  60. 60NogalesSonora, Mexico
    1032.4×
  61. 61TetovoTetovo, North Macedonia
    1032.4×
  62. 62NogalesArizona, United States
    1022.4×
  63. 63HanoiHanoi, Vietnam
    992.3×
  64. 64GardanneProvence-Alpes-Côte d'Azur, France
    992.3×
  65. 65Cluj-NapocaCluj County, Romania
    982.3×
  66. 66MillcreekUtah, United States
    972.3×
  67. 67Puerto VarasLos Lagos Region, Chile
    972.3×
  68. 68KigaliKigali, Rwanda
    972.2×
  69. 69LormontNew Aquitaine, France
    972.2×
  70. 69ZvolenBanská Bystrica Region, Slovakia
    972.2×
  71. 71HumennéPrešov Region, Slovakia
    962.2×
  72. 72Romans-sur-IsèreAuvergne-Rhône-Alpes, France
    962.2×
  73. 72ForbachGrand Est, France
    962.2×
  74. 74MaspalomasCanary Islands, Spain
    962.2×
  75. 75BangkokBangkok, Thailand
    952.2×
  76. 75Ciudad ApodacaNuevo León, Mexico
    952.2×
  77. 77West JordanUtah, United States
    952.2×
  78. 78AgüimesCanary Islands, Spain
    952.2×
  79. 79Phra PradaengSamut Prakan, Thailand
    942.2×
  80. 79TarbesOccitanie, France
    942.2×
  81. 81Gabrovolow-cost sensorsGabrovo, Bulgaria
    942.1×
  82. 82ArucasCanary Islands, Spain
    932.1×
  83. 83GrazStyria, Austria
    932.1×
  84. 84BordeauxNew Aquitaine, France
    922.1×
  85. 84Salt Lake CityUtah, United States
    922.1×
  86. 86AronaCanary Islands, Spain
    922.1×
  87. 87BitolaBitola, North Macedonia
    922.1×
  88. 88LleidaCatalonia, Spain
    912.1×
  89. 89Granadilla de AbonaCanary Islands, Spain
    912.0×
  90. 90TolucaMéxico, Mexico
    912.0×
  91. 91OurenseGalicia, Spain
    912.0×
  92. 92ŽilinaŽilina Region, Slovakia
    902.0×
  93. 93PrešovPrešov Region, Slovakia
    902.0×
  94. 94MedfordOregon, United States
    902.0×
  95. 95Zacatepec de HidalgoMorelos, Mexico
    902.0×
  96. 96ValdemoroMadrid, Spain
    892.0×
  97. 96San Francisco TlalcilalcalpanMéxico, Mexico
    892.0×
  98. 98Novi SadVojvodina, Serbia
    892.0×
  99. 99Fos-sur-MerProvence-Alpes-Côte d'Azur, France
    881.9×
  100. 100Arden-ArcadeCalifornia, United States
    881.9×
  101. 101CandelariaCanary Islands, Spain
    881.9×
  102. 101RouenNormandy, France
    881.9×
  103. 103SkopjeGrad Skopje, North Macedonia
    881.9×
  104. 104ToulouseOccitanie, France
    871.9×
  105. 105NyíregyházaSzabolcs-Szatmár-Bereg, Hungary
    871.9×
  106. 106Puerto del RosarioCanary Islands, Spain
    871.9×
  107. 106Ciudad JuárezChihuahua, Mexico
    871.9×
  108. 108Mueang NonthaburiNonthaburi, Thailand
    871.9×
  109. 108MartinŽilina Region, Slovakia
    871.9×
  110. 110KavadarciKavadarci, North Macedonia
    861.9×
  111. 110NancyGrand Est, France
    861.9×
  112. 112Bang Bo DistrictSamut Prakan, Thailand
    861.8×
  113. 112NîmesOccitanie, France
    861.8×
  114. 114CoyhaiqueAysén, Chile
    851.8×
  115. 115MercedCalifornia, United States
    851.8×
  116. 116IlindenIlinden, North Macedonia
    851.8×
  117. 117LourdesOccitanie, France
    851.8×
  118. 118Khlong LuangPathum Thani, Thailand
    841.8×
  119. 119Vranov nad TopľouPrešov Region, Slovakia
    831.8×
  120. 119GivorsAuvergne-Rhône-Alpes, France
    831.8×
  121. 119PortervilleCalifornia, United States
    831.8×
  122. 122Botevgradlow-cost sensorsSofia, Bulgaria
    831.8×
  123. 122BountifulUtah, United States
    831.8×
  124. 124IngenioCanary Islands, Spain
    831.7×
  125. 125WormsRheinland-Pfalz, Germany
    821.7×
  126. 125CastresOccitanie, France
    821.7×
  127. 127TeldeCanary Islands, Spain
    821.7×
  128. 127Santa Cruz de la PalmaCanary Islands, Spain
    821.7×
  129. 129BailénAndalusia, Spain
    821.7×
  130. 130KochaniKochani, North Macedonia
    821.7×
  131. 131SaarbrückenSaarland, Germany
    811.7×
  132. 132YangonYangon, Myanmar
    811.7×
  133. 132Samut PrakanSamut Prakan, Thailand
    811.7×
  134. 132České BudějoviceSouth Bohemian Region, Czechia
    811.7×
  135. 132Cadereyta JiménezNuevo León, Mexico
    811.7×
  136. 136ValenceAuvergne-Rhône-Alpes, France
    811.7×
  137. 137ÉvreuxNormandy, France
    801.7×
  138. 138Tuen MunTuen Mun, Hong Kong
    801.7×
  139. 139Wan ChaiWan Chai, Hong Kong
    801.6×
  140. 140PartizánskeTrenčín Region, Slovakia
    801.6×
  141. 141ShenyangLiaoning, China
    801.6×
  142. 142HandlováTrenčín Region, Slovakia
    801.6×
  143. 143LouviersNormandy, France
    791.6×
  144. 143DěčínÚstí nad Labem Region, Czechia
    791.6×
  145. 145Addis AbabaAddis Ababa, Ethiopia
    791.6×
  146. 146VigoGalicia, Spain
    781.6×
  147. 147MurciaMurcia, Spain
    781.6×
  148. 147VitrollesProvence-Alpes-Côte d'Azur, France
    781.6×
  149. 149Salon-de-ProvenceProvence-Alpes-Côte d'Azur, France
    781.6×
  150. 149MexicaliBaja California, Mexico
    781.6×
  151. 151SacramentoCalifornia, United States
    771.6×
  152. 152FréjusProvence-Alpes-Côte d'Azur, France
    771.5×
  153. 152EsztergomKomárom-Esztergom, Hungary
    771.5×
  154. 152San JoseCalifornia, United States
    771.5×
  155. 152HerrimanUtah, United States
    771.5×
  156. 156RennesBrittany, France
    771.5×
  157. 156PécsBaranya, Hungary
    771.5×
  158. 156TrenčínTrenčín Region, Slovakia
    771.5×
  159. 156Puerto MonttLos Lagos Region, Chile
    771.5×
  160. 160Collado-VillalbaMadrid, Spain
    771.5×
  161. 161LyonAuvergne-Rhône-Alpes, France
    771.5×
  162. 162GuangzhouGuangdong, China
    761.5×
  163. 162MagnaUtah, United States
    761.5×
  164. 164Redwood CityCalifornia, United States
    761.5×
  165. 165CreilHauts-de-France, France
    761.5×
  166. 166AvignonProvence-Alpes-Côte d'Azur, France
    761.5×
  167. 166Santa CatarinaNuevo León, Mexico
    761.5×
  168. 168ParisÎle-de-France, France
    751.5×
  169. 168CholulaPuebla, Mexico
    751.5×
  170. 170BorgomaneroPiedmont, Italy
    751.5×
  171. 171TraunUpper Austria, Austria
    751.5×
  172. 171BeneventoCampania, Italy
    751.5×
  173. 171CelayaGuanajuato, Mexico
    751.5×
  174. 171PhoenixArizona, United States
    751.5×
  175. 175VannesBrittany, France
    751.5×
  176. 175MeyzieuAuvergne-Rhône-Alpes, France
    751.5×
  177. 175LorientBrittany, France
    751.5×
  178. 178MonacoMunicipality of Monaco, Monaco
    741.4×
  179. 178LugoGalicia, Spain
    741.4×
  180. 178ButteMontana, United States
    741.4×
  181. 181ThessaloníkiCentral Macedonia, Greece
    741.4×
  182. 181TroyesGrand Est, France
    741.4×
  183. 181SarcellesÎle-de-France, France
    741.4×
  184. 181AltamontOregon, United States
    741.4×
  185. 185NitraNitra Region, Slovakia
    741.4×
  186. 186RužomberokŽilina Region, Slovakia
    741.4×
  187. 186MaderaCalifornia, United States
    741.4×
  188. 188ClovisCalifornia, United States
    741.4×
  189. 189Žiar nad HronomBanská Bystrica Region, Slovakia
    731.4×
  190. 190GrenobleAuvergne-Rhône-Alpes, France
    731.4×
  191. 190ValdiviaLos Ríos Region, Chile
    731.4×
  192. 190AricaArica y Parinacota Region, Chile
    731.4×
  193. 190GuadalajaraJalisco, Mexico
    731.4×
  194. 194IaşiIași County, Romania
    731.4×
  195. 194BeijingBeijing, China
    731.4×
  196. 194BensheimHesse, Germany
    731.4×
  197. 197SpeyerRheinland-Pfalz, Germany
    731.4×
  198. 198LunévilleGrand Est, France
    731.4×
  199. 198Tepeji del Río de OcampoHidalgo, Mexico
    731.4×
  200. 198TocopillaAntofagasta, Chile
    731.4×

Top 200 of 1,815 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 17, 2023, smogrank.com/history/2023-12-17 (accessed 2 Oct 2026).

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