SmogRank / History / December 15, 2023

Most polluted cities on December 15, 2023

1,871 cities ranked by their average PM2.5 over the day; the worst was Saltillo, Mexico, at 625.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during December 15, 2023. All episodes.

← Saltillo 625.0 µg/m³ 600 µg/m³15 WHO 24-hour guideline
Every city ranked for December 15, 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. 1SaltilloCoahuila, Mexico
    500+41.7×
  2. 2Lahorelow-cost sensorsPunjab, Pakistan
    500+24.7×
  3. 3Dhakalow-cost sensorsDhaka Division, Bangladesh
    33016.0×
  4. 4Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    31215.4×
  5. 5KolkataWest Bengal, India
    31015.3×
  6. 6DelhiDelhi, India
    25912.3×
  7. 7Karachilow-cost sensorsSindh, Pakistan
    2239.9×
  8. 8Lagoslow-cost sensorsLagos, Nigeria
    2098.9×
  9. 9Abujalow-cost sensorsFCT, Nigeria
    2058.7×
  10. 10Islamabadlow-cost sensorsIslamabad, Pakistan
    1967.9×
  11. 11Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    1735.8×
  12. 12SalorTashkent Region, Uzbekistan
    1715.6×
  13. 13Kampalalow-cost sensorsCentral Region, Uganda
    1695.4×
  14. 14HyderabadTelangana, India
    1655.0×
  15. 15Samut SakhonSamut Sakhon, Thailand
    1645.0×
  16. 16MumbaiMaharashtra, India
    1594.5×
  17. 17N'DjamenaN’Djaména, Chad
    1594.4×
  18. 18DushanbeDushanbe, Tajikistan
    1584.3×
  19. 19Kathmandulow-cost sensorsBagmati Province, Nepal
    1554.1×
  20. 19Victoria de DurangoDurango, Mexico
    1554.1×
  21. 21CairoCairo, Egypt
    1554.1×
  22. 22ChennaiTamil Nadu, India
    1533.9×
  23. 23Ulan BatorUlaanbaatar, Mongolia
    1513.7×
  24. 24HanfordCalifornia, United States
    1453.6×
  25. 25Almatylow-cost sensorsAlmaty, Kazakhstan
    1323.2×
  26. 26GuangzhouGuangdong, China
    1313.2×
  27. 27TlaquepaqueJalisco, Mexico
    1303.1×
  28. 28Mueang NonthaburiNonthaburi, Thailand
    1253.0×
  29. 29Nong KhaemBangkok, Thailand
    1233.0×
  30. 30Nakhon PathomNakhon Pathom, Thailand
    1202.9×
  31. 31MiskolcBorsod-Abaúj-Zemplén, Hungary
    1192.9×
  32. 32JakartaJakarta, Indonesia
    1172.8×
  33. 33FresnoCalifornia, United States
    1162.8×
  34. 34Banja LukaSrpska, Bosnia and Herzegovina
    1142.7×
  35. 35Khlong LuangPathum Thani, Thailand
    1132.7×
  36. 36HanoiHanoi, Vietnam
    1102.6×
  37. 37BakersfieldCalifornia, United States
    1092.6×
  38. 38VisaliaCalifornia, United States
    1082.6×
  39. 39ModestoCalifornia, United States
    1052.5×
  40. 40StocktonCalifornia, United States
    1042.5×
  41. 41MercedCalifornia, United States
    1032.4×
  42. 42BangkokBangkok, Thailand
    1032.4×
  43. 43KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    1032.4×
  44. 43Samut PrakanSamut Prakan, Thailand
    1032.4×
  45. 45CapannoriTuscany, Italy
    992.3×
  46. 46AltamontOregon, United States
    992.3×
  47. 47TurlockCalifornia, United States
    992.3×
  48. 48Zacatepec de HidalgoMorelos, Mexico
    982.3×
  49. 49ManlleuCatalonia, Spain
    962.2×
  50. 50Phra PradaengSamut Prakan, Thailand
    962.2×
  51. 51YangonYangon, Myanmar
    942.1×
  52. 52MantecaCalifornia, United States
    932.1×
  53. 53ZapopanJalisco, Mexico
    932.1×
  54. 54AnconaThe Marches, Italy
    922.1×
  55. 54TolucaMéxico, Mexico
    922.1×
  56. 56CholulaPuebla, Mexico
    902.0×
  57. 57ButteMontana, United States
    881.9×
  58. 58San Francisco TlalcilalcalpanMéxico, Mexico
    881.9×
  59. 59Bang Bo DistrictSamut Prakan, Thailand
    881.9×
  60. 60MaderaCalifornia, United States
    871.9×
  61. 61Puerto AysénAysén, Chile
    871.9×
  62. 62HavířovMoravian-Silesian Region, Czechia
    861.9×
  63. 63BogotáBogota D.C., Colombia
    851.8×
  64. 64Ciudad Benito JuárezNuevo León, Mexico
    841.8×
  65. 65Ceglie MessapicaApulia, Italy
    841.8×
  66. 66BelgradeCentral Serbia, Serbia
    831.8×
  67. 67Santa CatarinaNuevo León, Mexico
    831.7×
  68. 68AlessandriaPiedmont, Italy
    821.7×
  69. 69SaijōEhime, Japan
    821.7×
  70. 70GuadalajaraJalisco, Mexico
    811.7×
  71. 71SarajevoFederation of B&H, Bosnia and Herzegovina
    811.7×
  72. 71San JoseCalifornia, United States
    811.7×
  73. 73AricaArica y Parinacota Region, Chile
    811.7×
  74. 74KigaliKigali, Rwanda
    801.7×
  75. 75MillcreekUtah, United States
    801.6×
  76. 76Valašské MeziříčíZlín, Czechia
    791.6×
  77. 77Frýdek-MístekMoravian-Silesian Region, Czechia
    791.6×
  78. 78BitolaBitola, North Macedonia
    791.6×
  79. 79JesiThe Marches, Italy
    781.6×
  80. 80Falconara MarittimaThe Marches, Italy
    781.6×
  81. 80BensalemPennsylvania, United States
    781.6×
  82. 82FukuyamaHiroshima, Japan
    781.6×
  83. 82ColumbusOhio, United States
    781.6×
  84. 84ChicoCalifornia, United States
    781.6×
  85. 85TurinPiedmont, Italy
    771.6×
  86. 85PhoenixArizona, United States
    771.6×
  87. 85LivermoreCalifornia, United States
    771.6×
  88. 88Arden-ArcadeCalifornia, United States
    771.5×
  89. 89TetovoTetovo, North Macedonia
    771.5×
  90. 89SantiagoSantiago Metropolitan, Chile
    771.5×
  91. 91PátraWest Greece, Greece
    771.5×
  92. 92BohumínMoravian-Silesian Region, Czechia
    771.5×
  93. 93Grand RapidsMichigan, United States
    761.5×
  94. 93ClovisCalifornia, United States
    761.5×
  95. 93PleasantonCalifornia, United States
    761.5×
  96. 96ShakopeeMinnesota, United States
    761.5×
  97. 97Puente AltoSantiago Metropolitan, Chile
    761.5×
  98. 97West JordanUtah, United States
    761.5×
  99. 99TřinecMoravian-Silesian Region, Czechia
    761.5×
  100. 99OstravaMoravian-Silesian Region, Czechia
    761.5×
  101. 101CoyhaiqueAysén, Chile
    751.5×
  102. 101DavisCalifornia, United States
    751.5×
  103. 101OaklandCalifornia, United States
    751.5×
  104. 101MedfordOregon, United States
    751.5×
  105. 105ArrecifeCanary Islands, Spain
    751.5×
  106. 106KurashikiOkayama, Japan
    751.5×
  107. 106MiddletownOhio, United States
    751.5×
  108. 108BakuBaki, Azerbaijan
    751.5×
  109. 108AngersPays de la Loire, France
    751.5×
  110. 110TocopillaAntofagasta, Chile
    741.4×
  111. 111Wan ChaiWan Chai, Hong Kong
    741.4×
  112. 112Novi SadVojvodina, Serbia
    741.4×
  113. 112RengoO'Higgins Region, Chile
    741.4×
  114. 112Redwood CityCalifornia, United States
    741.4×
  115. 112ChikuseiIbaraki, Japan
    741.4×
  116. 116CopiapóAtacama, Chile
    741.4×
  117. 116MinneapolisMinnesota, United States
    741.4×
  118. 118Český TěšínMoravian-Silesian Region, Czechia
    731.4×
  119. 119DetroitMichigan, United States
    731.4×
  120. 120NišCentral Serbia, Serbia
    731.4×
  121. 120RancaguaO'Higgins Region, Chile
    731.4×
  122. 122Salt Lake CityUtah, United States
    731.4×
  123. 123TeltowBrandenburg, Germany
    731.4×
  124. 124CoulommiersÎle-de-France, France
    721.4×
  125. 125PocatelloIdaho, United States
    721.4×
  126. 126Spišská Nová VesKošice Region, Slovakia
    721.4×
  127. 126GrazStyria, Austria
    721.4×
  128. 126NeuwiedRheinland-Pfalz, Germany
    721.4×
  129. 126QuinteroValparaiso, Chile
    721.4×
  130. 130AntananarivoAnalamanga, Madagascar
    721.4×
  131. 130TamanoOkayama, Japan
    721.4×
  132. 132Saint MichaelMinnesota, United States
    721.3×
  133. 133Ciudad JuárezChihuahua, Mexico
    711.3×
  134. 133CantonOhio, United States
    711.3×
  135. 135BurnsvilleMinnesota, United States
    711.3×
  136. 136QuillotaValparaiso, Chile
    711.3×
  137. 136Saint PaulMinnesota, United States
    711.3×
  138. 136San FranciscoCalifornia, United States
    711.3×
  139. 139São PauloSão Paulo, Brazil
    711.3×
  140. 139KaminomaAichi, Japan
    711.3×
  141. 141UnnaNorth Rhine-Westphalia, Germany
    711.3×
  142. 141BlaineMinnesota, United States
    711.3×
  143. 143IseMie, Japan
    701.3×
  144. 143GelsenkirchenNorth Rhine-Westphalia, Germany
    701.3×
  145. 143OpavaMoravian-Silesian Region, Czechia
    701.3×
  146. 143CuernavacaMorelos, Mexico
    701.3×
  147. 143KalamazooMichigan, United States
    701.3×
  148. 143West MifflinPennsylvania, United States
    701.3×
  149. 143MagnaUtah, United States
    701.3×
  150. 150AsprópyrgosAttica, Greece
    701.3×
  151. 150DearbornMichigan, United States
    701.3×
  152. 152SaikūMie, Japan
    701.3×
  153. 152DattelnNorth Rhine-Westphalia, Germany
    701.3×
  154. 152BielefeldNorth Rhine-Westphalia, Germany
    701.3×
  155. 152MelunÎle-de-France, France
    701.3×
  156. 152SulphurLouisiana, United States
    701.3×
  157. 152Las VegasNevada, United States
    701.3×
  158. 158KameyamaMie, Japan
    701.3×
  159. 158HagenNorth Rhine-Westphalia, Germany
    701.3×
  160. 158NorwoodOhio, United States
    701.3×
  161. 158BaytownTexas, United States
    701.3×
  162. 158HoustonTexas, United States
    701.3×
  163. 158TracyCalifornia, United States
    701.3×
  164. 158FairbanksAlaska, United States
    701.3×
  165. 165MünsterNorth Rhine-Westphalia, Germany
    701.3×
  166. 165MexicaliBaja California, Mexico
    701.3×
  167. 167BerlinState of Berlin, Germany
    691.3×
  168. 168KazoSaitama, Japan
    691.3×
  169. 168DortmundNorth Rhine-Westphalia, Germany
    691.3×
  170. 168CoburgBavaria, Germany
    691.3×
  171. 168TalaganteSantiago Metropolitan, Chile
    691.3×
  172. 168East RidgeTennessee, United States
    691.3×
  173. 173NiihamaEhime, Japan
    691.3×
  174. 173Puerto VarasLos Lagos Region, Chile
    691.3×
  175. 173WoodlandCalifornia, United States
    691.3×
  176. 176AsakuchiOkayama, Japan
    691.2×
  177. 177ValenciennesHauts-de-France, France
    691.2×
  178. 177DaytonOhio, United States
    691.2×
  179. 179Addis AbabaAddis Ababa, Ethiopia
    691.2×
  180. 179KōnosuSaitama, Japan
    691.2×
  181. 179Viña del MarValparaiso, Chile
    691.2×
  182. 182ShenyangLiaoning, China
    681.2×
  183. 182Green BayWisconsin, United States
    681.2×
  184. 182WindsorOntario, Canada
    681.2×
  185. 185Saint CloudMinnesota, United States
    681.2×
  186. 186Sainte-Geneviève-des-BoisÎle-de-France, France
    681.2×
  187. 186Ciudad General EscobedoNuevo León, Mexico
    681.2×
  188. 188WuppertalNorth Rhine-Westphalia, Germany
    681.2×
  189. 188CuricóMaule Region, Chile
    681.2×
  190. 188SalemOregon, United States
    681.2×
  191. 188TorontoOntario, Canada
    681.2×
  192. 192GyōdaSaitama, Japan
    681.2×
  193. 192BorkenNorth Rhine-Westphalia, Germany
    681.2×
  194. 192TroyesGrand Est, France
    681.2×
  195. 192Ciudad ApodacaNuevo León, Mexico
    681.2×
  196. 192RosevilleCalifornia, United States
    681.2×
  197. 197OberhausenNorth Rhine-Westphalia, Germany
    671.2×
  198. 197BottropNorth Rhine-Westphalia, Germany
    671.2×
  199. 197ŽilinaŽilina Region, Slovakia
    671.2×
  200. 197VigoGalicia, Spain
    671.2×

Top 200 of 1,871 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 15, 2023, smogrank.com/history/2023-12-15 (accessed 2 Oct 2026).

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