SmogRank / History / December 14, 2023

Most polluted cities on December 14, 2023

1,922 cities ranked by their average PM2.5 over the day; the worst was Saltillo, Mexico, at 987.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during December 14, 2023. All episodes.

← Saltillo 987.0 µg/m³ 900 µg/m³15 WHO 24-hour guideline
Every city ranked for December 14, 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+65.8×
  2. 2Lahorelow-cost sensorsPunjab, Pakistan
    36617.2×
  3. 3Dhakalow-cost sensorsDhaka Division, Bangladesh
    33216.1×
  4. 4SalorTashkent Region, Uzbekistan
    28914.3×
  5. 5Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    27113.1×
  6. 6N'DjamenaN’Djaména, Chad
    26212.5×
  7. 7DelhiDelhi, India
    24711.5×
  8. 8KolkataWest Bengal, India
    24411.3×
  9. 9Abujalow-cost sensorsFCT, Nigeria
    2209.7×
  10. 10Islamabadlow-cost sensorsIslamabad, Pakistan
    2048.6×
  11. 11Lagoslow-cost sensorsLagos, Nigeria
    1917.5×
  12. 12Karachilow-cost sensorsSindh, Pakistan
    1897.3×
  13. 13JakartaJakarta, Indonesia
    1756.0×
  14. 14Almatylow-cost sensorsAlmaty, Kazakhstan
    1745.9×
  15. 15Victoria de DurangoDurango, Mexico
    1675.2×
  16. 16TlaquepaqueJalisco, Mexico
    1665.1×
  17. 17MumbaiMaharashtra, India
    1614.6×
  18. 18AngoulêmeNew Aquitaine, France
    1594.5×
  19. 19HyderabadTelangana, India
    1574.2×
  20. 20ChennaiTamil Nadu, India
    1564.2×
  21. 21Haskovolow-cost sensorsHaskovo, Bulgaria
    1554.1×
  22. 22Kampalalow-cost sensorsCentral Region, Uganda
    1544.0×
  23. 23KochaniKochani, North Macedonia
    1543.9×
  24. 24VolosThessaly, Greece
    1533.8×
  25. 25BeijingBeijing, China
    1513.7×
  26. 26CairoCairo, Egypt
    1423.5×
  27. 27SkopjeGrad Skopje, North Macedonia
    1393.4×
  28. 28Kathmandulow-cost sensorsBagmati Province, Nepal
    1383.4×
  29. 29Samut SakhonSamut Sakhon, Thailand
    1363.3×
  30. 30ThessaloníkiCentral Macedonia, Greece
    1333.2×
  31. 31GuangzhouGuangdong, China
    1333.2×
  32. 32ShenyangLiaoning, China
    1313.2×
  33. 33HanfordCalifornia, United States
    1313.2×
  34. 34HanoiHanoi, Vietnam
    1293.1×
  35. 35Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    1273.1×
  36. 36La OrotavaCanary Islands, Spain
    1222.9×
  37. 37ŽilinaŽilina Region, Slovakia
    1222.9×
  38. 38TetovoTetovo, North Macedonia
    1202.9×
  39. 39Banja LukaSrpska, Bosnia and Herzegovina
    1202.9×
  40. 40Spišská Nová VesKošice Region, Slovakia
    1142.7×
  41. 40YangonYangon, Myanmar
    1142.7×
  42. 42DushanbeDushanbe, Tajikistan
    1132.7×
  43. 43BakersfieldCalifornia, United States
    1132.7×
  44. 44FresnoCalifornia, United States
    1102.6×
  45. 45Nakhon PathomNakhon Pathom, Thailand
    1082.6×
  46. 46AltamontOregon, United States
    1072.5×
  47. 47AnconaThe Marches, Italy
    1062.5×
  48. 48BohumínMoravian-Silesian Region, Czechia
    1042.5×
  49. 49VisaliaCalifornia, United States
    1032.4×
  50. 50NišCentral Serbia, Serbia
    1022.4×
  51. 50OstravaMoravian-Silesian Region, Czechia
    1022.4×
  52. 52TřinecMoravian-Silesian Region, Czechia
    1002.4×
  53. 53HavířovMoravian-Silesian Region, Czechia
    1002.3×
  54. 53ModestoCalifornia, United States
    1002.3×
  55. 55Khlong LuangPathum Thani, Thailand
    982.3×
  56. 56Wan ChaiWan Chai, Hong Kong
    972.2×
  57. 57BakuBaki, Azerbaijan
    962.2×
  58. 58TurlockCalifornia, United States
    952.2×
  59. 59KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    952.2×
  60. 60ColomboWestern Province, Sri Lanka
    952.2×
  61. 61IndianapolisIndiana, United States
    942.1×
  62. 62Mueang NonthaburiNonthaburi, Thailand
    932.1×
  63. 63MiskolcBorsod-Abaúj-Zemplén, Hungary
    922.1×
  64. 63CapannoriTuscany, Italy
    922.1×
  65. 65GrazStyria, Austria
    922.1×
  66. 66KavadarciKavadarci, North Macedonia
    912.0×
  67. 67Český TěšínMoravian-Silesian Region, Czechia
    912.0×
  68. 68RuseRuse, Bulgaria
    912.0×
  69. 68MantecaCalifornia, United States
    912.0×
  70. 70MercedCalifornia, United States
    902.0×
  71. 71AsprópyrgosAttica, Greece
    902.0×
  72. 71Nong KhaemBangkok, Thailand
    902.0×
  73. 71Frýdek-MístekMoravian-Silesian Region, Czechia
    902.0×
  74. 74PřerovOlomouc Region, Czechia
    902.0×
  75. 75ClovisCalifornia, United States
    902.0×
  76. 76ZapopanJalisco, Mexico
    902.0×
  77. 77HandlováTrenčín Region, Slovakia
    892.0×
  78. 78BadgerAlaska, United States
    892.0×
  79. 79OpavaMoravian-Silesian Region, Czechia
    892.0×
  80. 80San Francisco TlalcilalcalpanMéxico, Mexico
    892.0×
  81. 80GuadalajaraJalisco, Mexico
    892.0×
  82. 82Valašské MeziříčíZlín, Czechia
    881.9×
  83. 82StocktonCalifornia, United States
    881.9×
  84. 84Banská BystricaBanská Bystrica Region, Slovakia
    881.9×
  85. 85TolucaMéxico, Mexico
    881.9×
  86. 86Ulan BatorUlaanbaatar, Mongolia
    871.9×
  87. 87TurinPiedmont, Italy
    861.9×
  88. 88Falconara MarittimaThe Marches, Italy
    861.9×
  89. 88MexicaliBaja California, Mexico
    861.9×
  90. 90MaderaCalifornia, United States
    861.9×
  91. 91BorgomaneroPiedmont, Italy
    851.8×
  92. 92BangkokBangkok, Thailand
    851.8×
  93. 92Arden-ArcadeCalifornia, United States
    851.8×
  94. 94Zacatepec de HidalgoMorelos, Mexico
    841.8×
  95. 95IlindenIlinden, North Macedonia
    841.8×
  96. 96AthensAttica, Greece
    831.8×
  97. 97KigaliKigali, Rwanda
    831.7×
  98. 98Phra PradaengSamut Prakan, Thailand
    821.7×
  99. 99AlessandriaPiedmont, Italy
    821.7×
  100. 99DenverColorado, United States
    821.7×
  101. 101JesiThe Marches, Italy
    821.7×
  102. 102PartizánskeTrenčín Region, Slovakia
    821.7×
  103. 102SarajevoFederation of B&H, Bosnia and Herzegovina
    821.7×
  104. 104Bang Bo DistrictSamut Prakan, Thailand
    811.7×
  105. 105SacramentoCalifornia, United States
    811.7×
  106. 106MiddletownOhio, United States
    801.7×
  107. 107ThorntonColorado, United States
    801.7×
  108. 107San Salvador TizatlalliMéxico, Mexico
    801.7×
  109. 109Samut PrakanSamut Prakan, Thailand
    801.6×
  110. 110MartinŽilina Region, Slovakia
    801.6×
  111. 111BucharestBucharest, Romania
    791.6×
  112. 111Mong KokYau Tsim Mong District, Hong Kong
    791.6×
  113. 113ZnojmoSouth Moravian, Czechia
    791.6×
  114. 114PrešovPrešov Region, Slovakia
    781.6×
  115. 114QuinteroValparaiso, Chile
    781.6×
  116. 116NorwoodOhio, United States
    771.5×
  117. 117Viña del MarValparaiso, Chile
    761.5×
  118. 118PiraeusAttica, Greece
    761.5×
  119. 118AricaArica y Parinacota Region, Chile
    761.5×
  120. 120BogotáBogota D.C., Colombia
    761.5×
  121. 121Gabrovolow-cost sensorsGabrovo, Bulgaria
    751.5×
  122. 122Sau Mau PingKwun Tong District, Hong Kong
    751.5×
  123. 122Puerto VarasLos Lagos Region, Chile
    751.5×
  124. 122Puente AltoSantiago Metropolitan, Chile
    751.5×
  125. 125Granadilla de AbonaCanary Islands, Spain
    741.4×
  126. 126BerounCentral Bohemia, Czechia
    741.4×
  127. 127TrenčínTrenčín Region, Slovakia
    741.4×
  128. 127PrievidzaTrenčín Region, Slovakia
    741.4×
  129. 127QuillotaValparaiso, Chile
    741.4×
  130. 127Terre HauteIndiana, United States
    741.4×
  131. 131TijuanaBaja California, Mexico
    741.4×
  132. 132SpartanburgSouth Carolina, United States
    741.4×
  133. 132LivermoreCalifornia, United States
    741.4×
  134. 134PátraWest Greece, Greece
    741.4×
  135. 135RichmondCalifornia, United States
    731.4×
  136. 135TracyCalifornia, United States
    731.4×
  137. 137TalaganteSantiago Metropolitan, Chile
    731.4×
  138. 137San FranciscoCalifornia, United States
    731.4×
  139. 139NottinghamEngland, United Kingdom
    731.4×
  140. 140SantiagoSantiago Metropolitan, Chile
    731.4×
  141. 140RengoO'Higgins Region, Chile
    731.4×
  142. 142TocopillaAntofagasta, Chile
    731.4×
  143. 143PleasantonCalifornia, United States
    721.4×
  144. 143ButteMontana, United States
    721.4×
  145. 145VelesVeles, North Macedonia
    721.4×
  146. 146RancaguaO'Higgins Region, Chile
    721.4×
  147. 146ConcónValparaiso, Chile
    721.4×
  148. 146Saint JosephMissouri, United States
    721.4×
  149. 149Ciudad JuárezChihuahua, Mexico
    721.4×
  150. 150ZvolenBanská Bystrica Region, Slovakia
    721.3×
  151. 150ChicoCalifornia, United States
    721.3×
  152. 150OaklandCalifornia, United States
    721.3×
  153. 153Tai PoTai Po, Hong Kong
    711.3×
  154. 153ZlínZlín, Czechia
    711.3×
  155. 153LiberecLiberec Region, Czechia
    711.3×
  156. 153CoquimboCoquimbo Region, Chile
    711.3×
  157. 153PhoenixArizona, United States
    711.3×
  158. 158Sham Shui PoSham Shui Po District, Hong Kong
    711.3×
  159. 158NogalesSonora, Mexico
    711.3×
  160. 160Addis AbabaAddis Ababa, Ethiopia
    711.3×
  161. 160VictoriaCentral and Western, Hong Kong
    711.3×
  162. 160Ceglie MessapicaApulia, Italy
    711.3×
  163. 160AntofagastaAntofagasta, Chile
    711.3×
  164. 164AntananarivoAnalamanga, Madagascar
    701.3×
  165. 165Granite CityIllinois, United States
    701.3×
  166. 165WoodlandCalifornia, United States
    701.3×
  167. 165Grants PassOregon, United States
    701.3×
  168. 168ColumbusOhio, United States
    701.3×
  169. 169WolfsbergCarinthia, Austria
    701.3×
  170. 169PocatelloIdaho, United States
    701.3×
  171. 171KlaipėdaKlaipėda County, Lithuania
    701.3×
  172. 171Žiar nad HronomBanská Bystrica Region, Slovakia
    701.3×
  173. 171NacimientoBiobio, Chile
    701.3×
  174. 171CincinnatiOhio, United States
    701.3×
  175. 175České BudějoviceSouth Bohemian Region, Czechia
    691.3×
  176. 175ManlleuCatalonia, Spain
    691.3×
  177. 177PortervilleCalifornia, United States
    691.3×
  178. 177San JoseCalifornia, United States
    691.3×
  179. 179SliemaTas-Sliema, Malta
    691.3×
  180. 179QuilpuéValparaiso, Chile
    691.3×
  181. 181OlomoucOlomouc Region, Czechia
    691.2×
  182. 181CuricóMaule Region, Chile
    691.2×
  183. 181CuranilahueBiobio, Chile
    691.2×
  184. 181NogalesArizona, United States
    691.2×
  185. 185Santa Cruz de TenerifeCanary Islands, Spain
    691.2×
  186. 185ToméBiobio, Chile
    691.2×
  187. 187PardubicePardubice Region, Czechia
    691.2×
  188. 187HualpénBiobio, Chile
    691.2×
  189. 187MasonOhio, United States
    691.2×
  190. 190Santa Cruz de la PalmaCanary Islands, Spain
    681.2×
  191. 191GyőrGyőr-Moson-Sopron, Hungary
    681.2×
  192. 191DaytonOhio, United States
    681.2×
  193. 193EsztergomKomárom-Esztergom, Hungary
    681.2×
  194. 193MedfordOregon, United States
    681.2×
  195. 195HumennéPrešov Region, Slovakia
    681.2×
  196. 195ChillánÑuble, Chile
    681.2×
  197. 195GlendaleArizona, United States
    681.2×
  198. 195Redwood CityCalifornia, United States
    681.2×
  199. 199Kansas CityKansas, United States
    671.2×
  200. 199West MifflinPennsylvania, United States
    671.2×

Top 200 of 1,922 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 14, 2023, smogrank.com/history/2023-12-14 (accessed 2 Oct 2026).

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