SmogRank / History / December 9, 2023

Most polluted cities on December 9, 2023

1,940 cities ranked by their average PM2.5 over the day; the worst was Ramos Arizpe, Mexico, at 383.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during December 9, 2023. All episodes.

← Ramos Arizpe 383.0 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every city ranked for December 9, 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. 1Ramos ArizpeCoahuila, Mexico
    500+25.5×
  2. 2Lahorelow-cost sensorsPunjab, Pakistan
    41618.9×
  3. 3Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    26212.5×
  4. 4DelhiDelhi, India
    24211.1×
  5. 5Islamabadlow-cost sensorsIslamabad, Pakistan
    1998.3×
  6. 6KolkataWest Bengal, India
    1947.8×
  7. 7SarajevoFederation of B&H, Bosnia and Herzegovina
    1887.2×
  8. 8Dhakalow-cost sensorsDhaka Division, Bangladesh
    1867.0×
  9. 9DushanbeDushanbe, Tajikistan
    1836.7×
  10. 10CairoCairo, Egypt
    1796.4×
  11. 11Karachilow-cost sensorsSindh, Pakistan
    1786.3×
  12. 12N'DjamenaN’Djaména, Chad
    1766.1×
  13. 13ManamaManama, Bahrain
    1756.0×
  14. 14Samut SakhonSamut Sakhon, Thailand
    1594.5×
  15. 15Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1584.4×
  16. 16HanoiHanoi, Vietnam
    1584.4×
  17. 17MumbaiMaharashtra, India
    1554.1×
  18. 18Abujalow-cost sensorsFCT, Nigeria
    1533.8×
  19. 19HavířovMoravian-Silesian Region, Czechia
    1523.8×
  20. 20HyderabadTelangana, India
    1453.6×
  21. 21Victoria de DurangoDurango, Mexico
    1433.5×
  22. 22SalorTashkent Region, Uzbekistan
    1413.4×
  23. 23Kampalalow-cost sensorsCentral Region, Uganda
    1343.3×
  24. 24CholulaPuebla, Mexico
    1313.2×
  25. 25Nong KhaemBangkok, Thailand
    1293.1×
  26. 26Ciudad Benito JuárezNuevo León, Mexico
    1283.1×
  27. 27BadgerAlaska, United States
    1283.1×
  28. 28BelgradeCentral Serbia, Serbia
    1273.1×
  29. 29NišCentral Serbia, Serbia
    1253.0×
  30. 30ChikuseiIbaraki, Japan
    1243.0×
  31. 31Mueang NonthaburiNonthaburi, Thailand
    1222.9×
  32. 32RužomberokŽilina Region, Slovakia
    1212.9×
  33. 33BeijingBeijing, China
    1192.9×
  34. 34Ciudad ApodacaNuevo León, Mexico
    1182.8×
  35. 35KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    1172.8×
  36. 36BitolaBitola, North Macedonia
    1172.8×
  37. 37MostÚstí nad Labem Region, Czechia
    1162.8×
  38. 38GuangzhouGuangdong, China
    1152.7×
  39. 39VelesVeles, North Macedonia
    1142.7×
  40. 40TetovoTetovo, North Macedonia
    1142.7×
  41. 41Spišská Nová VesKošice Region, Slovakia
    1132.7×
  42. 42KavadarciKavadarci, North Macedonia
    1132.7×
  43. 43Novi SadVojvodina, Serbia
    1122.7×
  44. 44BohumínMoravian-Silesian Region, Czechia
    1122.7×
  45. 45TlaquepaqueJalisco, Mexico
    1122.7×
  46. 46LitvínovÚstí nad Labem Region, Czechia
    1102.6×
  47. 47Khlong LuangPathum Thani, Thailand
    1102.6×
  48. 48Nakhon PathomNakhon Pathom, Thailand
    1102.6×
  49. 49JakartaJakarta, Indonesia
    1092.6×
  50. 50BangkokBangkok, Thailand
    1092.6×
  51. 51ŽilinaŽilina Region, Slovakia
    1042.4×
  52. 52Phra PradaengSamut Prakan, Thailand
    1032.4×
  53. 53KadaňÚstí nad Labem Region, Czechia
    1022.4×
  54. 54SkopjeGrad Skopje, North Macedonia
    1022.4×
  55. 54DunaújvárosFejér, Hungary
    1022.4×
  56. 54BensalemPennsylvania, United States
    1022.4×
  57. 57KošiceKošice Region, Slovakia
    1012.4×
  58. 58GrazStyria, Austria
    1002.4×
  59. 58TepliceÚstí nad Labem Region, Czechia
    1002.4×
  60. 60MiskolcBorsod-Abaúj-Zemplén, Hungary
    992.3×
  61. 61BeneventoCampania, Italy
    972.3×
  62. 62KigaliKigali, Rwanda
    962.2×
  63. 63PassauBavaria, Germany
    962.2×
  64. 63ZapopanJalisco, Mexico
    962.2×
  65. 65Samut PrakanSamut Prakan, Thailand
    952.2×
  66. 66AnsfeldenUpper Austria, Austria
    922.1×
  67. 67Wan ChaiWan Chai, Hong Kong
    912.1×
  68. 68LiberpolisCounty of Osijek-Baranja, Croatia
    912.0×
  69. 69Falconara MarittimaThe Marches, Italy
    912.0×
  70. 70CelayaGuanajuato, Mexico
    902.0×
  71. 71TurinPiedmont, Italy
    902.0×
  72. 72TraunUpper Austria, Austria
    902.0×
  73. 73MartinŽilina Region, Slovakia
    892.0×
  74. 74PesaroThe Marches, Italy
    881.9×
  75. 75SantiagoSantiago Metropolitan, Chile
    881.9×
  76. 76JeddahMecca Region, Saudi Arabia
    881.9×
  77. 77Mong KokYau Tsim Mong District, Hong Kong
    871.9×
  78. 78FresnoCalifornia, United States
    871.9×
  79. 79PátraWest Greece, Greece
    871.9×
  80. 79WelsUpper Austria, Austria
    871.9×
  81. 81Ceglie MessapicaApulia, Italy
    871.9×
  82. 82KasaokaOkayama, Japan
    861.9×
  83. 82VisaliaCalifornia, United States
    861.9×
  84. 84Botevgradlow-cost sensorsSofia, Bulgaria
    861.9×
  85. 85SōjaOkayama, Japan
    851.8×
  86. 85DěčínÚstí nad Labem Region, Czechia
    851.8×
  87. 85AlessandriaPiedmont, Italy
    851.8×
  88. 88BerounCentral Bohemia, Czechia
    851.8×
  89. 88MonterreyNuevo León, Mexico
    851.8×
  90. 90OstravaMoravian-Silesian Region, Czechia
    851.8×
  91. 91PilsenPlzeň Region, Czechia
    851.8×
  92. 91HarrisburgPennsylvania, United States
    851.8×
  93. 91JōsōIbaraki, Japan
    851.8×
  94. 94LinzUpper Austria, Austria
    841.8×
  95. 95PrešovPrešov Region, Slovakia
    841.8×
  96. 96LancasterPennsylvania, United States
    831.8×
  97. 97Tuen MunTuen Mun, Hong Kong
    831.8×
  98. 97StralsundMecklenburg-Vorpommern, Germany
    831.8×
  99. 99DanburyConnecticut, United States
    831.7×
  100. 100GardanneProvence-Alpes-Côte d'Azur, France
    821.7×
  101. 101VolosThessaly, Greece
    821.7×
  102. 101Shimo-tsumaIbaraki, Japan
    821.7×
  103. 101AugustaMaine, United States
    821.7×
  104. 104Kan’onjichōKagawa, Japan
    821.7×
  105. 104WolfsbergCarinthia, Austria
    821.7×
  106. 106MiyakonojōMiyazaki, Japan
    821.7×
  107. 106PhiladelphiaPennsylvania, United States
    821.7×
  108. 108NodaChiba, Japan
    811.7×
  109. 108AbasoloGuanajuato, Mexico
    811.7×
  110. 110IlindenIlinden, North Macedonia
    811.7×
  111. 110San Francisco TlalcilalcalpanMéxico, Mexico
    811.7×
  112. 112Ústí nad LabemÚstí nad Labem Region, Czechia
    811.7×
  113. 113NyíregyházaSzabolcs-Szatmár-Bereg, Hungary
    811.7×
  114. 113Český TěšínMoravian-Silesian Region, Czechia
    811.7×
  115. 115MizuhoGifu, Japan
    801.7×
  116. 116Puente AltoSantiago Metropolitan, Chile
    801.7×
  117. 117Sankt PöltenLower Austria, Austria
    801.6×
  118. 117AmstettenLower Austria, Austria
    801.6×
  119. 119Addis AbabaAddis Ababa, Ethiopia
    801.6×
  120. 119SuzukaMie, Japan
    801.6×
  121. 119SteyrUpper Austria, Austria
    801.6×
  122. 122San Andrés TuxtlaVeracruz, Mexico
    801.6×
  123. 123KurashikiOkayama, Japan
    801.6×
  124. 123LebanonPennsylvania, United States
    801.6×
  125. 125TolucaMéxico, Mexico
    791.6×
  126. 126HumennéPrešov Region, Slovakia
    791.6×
  127. 126Sham Shui PoSham Shui Po District, Hong Kong
    791.6×
  128. 126JesiThe Marches, Italy
    791.6×
  129. 129Almatylow-cost sensorsAlmaty, Kazakhstan
    791.6×
  130. 130RigaRiga, Latvia
    791.6×
  131. 130YokkaichiMie, Japan
    791.6×
  132. 130Frýdek-MístekMoravian-Silesian Region, Czechia
    791.6×
  133. 133HanfordCalifornia, United States
    781.6×
  134. 134AntananarivoAnalamanga, Madagascar
    781.6×
  135. 134Silao de la VictoriaGuanajuato, Mexico
    781.6×
  136. 134GuadalajaraJalisco, Mexico
    781.6×
  137. 134AsakuchiOkayama, Japan
    781.6×
  138. 138YatomiAichi, Japan
    781.6×
  139. 139VictoriaCentral and Western, Hong Kong
    781.6×
  140. 139Cadereyta JiménezNuevo León, Mexico
    781.6×
  141. 141HandaAichi, Japan
    781.6×
  142. 141ManlleuCatalonia, Spain
    781.6×
  143. 143Vranov nad TopľouPrešov Region, Slovakia
    771.5×
  144. 143GreenfieldMassachusetts, United States
    771.5×
  145. 145Schwedt (Oder)Brandenburg, Germany
    771.5×
  146. 146FukuyamaHiroshima, Japan
    771.5×
  147. 146GapProvence-Alpes-Côte d'Azur, France
    771.5×
  148. 146OlomoucOlomouc Region, Czechia
    771.5×
  149. 149Tai PoTai Po, Hong Kong
    771.5×
  150. 149ElizabethNew Jersey, United States
    771.5×
  151. 151Klagenfurt am WörtherseeCarinthia, Austria
    771.5×
  152. 151TrnavaTrnava Region, Slovakia
    771.5×
  153. 151Santiago de QuerétaroQuerétaro, Mexico
    771.5×
  154. 151CarlislePennsylvania, United States
    771.5×
  155. 155BolzanoTrentino-Alto Adige, Italy
    761.5×
  156. 155Ciudad General EscobedoNuevo León, Mexico
    761.5×
  157. 157KazoSaitama, Japan
    761.5×
  158. 157MalmöSkåne, Sweden
    761.5×
  159. 157BratislavaBratislava Region, Slovakia
    761.5×
  160. 160MookaTochigi, Japan
    761.5×
  161. 160TrentoTrentino-Alto Adige, Italy
    761.5×
  162. 160YorkPennsylvania, United States
    761.5×
  163. 163HokotaIbaraki, Japan
    761.5×
  164. 163GyőrGyőr-Moson-Sopron, Hungary
    761.5×
  165. 163QuinteroValparaiso, Chile
    761.5×
  166. 163IrapuatoGuanajuato, Mexico
    761.5×
  167. 167PartizánskeTrenčín Region, Slovakia
    761.5×
  168. 167AricaArica y Parinacota Region, Chile
    761.5×
  169. 167San Salvador TizatlalliMéxico, Mexico
    761.5×
  170. 170Sau Mau PingKwun Tong District, Hong Kong
    751.5×
  171. 170PennsaukenNew Jersey, United States
    751.5×
  172. 172YangonYangon, Myanmar
    751.5×
  173. 172RoveretoTrentino-Alto Adige, Italy
    751.5×
  174. 174KochaniKochani, North Macedonia
    751.5×
  175. 174Tin Shui WaiYuen Long, Hong Kong
    751.5×
  176. 174YoukaichiShiga, Japan
    751.5×
  177. 174TsuyamaOkayama, Japan
    751.5×
  178. 178ThessaloníkiCentral Macedonia, Greece
    751.5×
  179. 178BadenLower Austria, Austria
    751.5×
  180. 178ReadingPennsylvania, United States
    751.5×
  181. 181Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    751.5×
  182. 181TsuchiuraIbaraki, Japan
    751.5×
  183. 183KameyamaMie, Japan
    741.4×
  184. 184ZnojmoSouth Moravian, Czechia
    741.4×
  185. 184Santa CatarinaNuevo León, Mexico
    741.4×
  186. 186YawataKyoto, Japan
    741.4×
  187. 186TsuMie, Japan
    741.4×
  188. 186GyōdaSaitama, Japan
    741.4×
  189. 186PatersonNew Jersey, United States
    741.4×
  190. 190ChesterPennsylvania, United States
    741.4×
  191. 190LindenNew Jersey, United States
    741.4×
  192. 192NaplesCampania, Italy
    741.4×
  193. 193PécsBaranya, Hungary
    731.4×
  194. 193PřerovOlomouc Region, Czechia
    731.4×
  195. 193Mladá BoleslavCentral Bohemia, Czechia
    731.4×
  196. 196DejCluj County, Romania
    731.4×
  197. 196FanlingNorth District, Hong Kong
    731.4×
  198. 196TokonameAichi, Japan
    731.4×
  199. 196TakahashiOkayama, Japan
    731.4×
  200. 196PrievidzaTrenčín Region, Slovakia
    731.4×

Top 200 of 1,940 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 9, 2023, smogrank.com/history/2023-12-09 (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.