SmogRank / History / December 9, 2024

Most polluted cities on December 9, 2024

2,271 cities ranked by their average PM2.5 over the day; the worst was Ulan Bator, Mongolia, at 255.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during December 9, 2024. All episodes.

← Ulan Bator 255.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for December 9, 2024, 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. 1Ulan BatorUlaanbaatar, Mongolia
    36017.0×
  2. 2Dhakalow-cost sensorsDhaka Division, Bangladesh
    31815.6×
  3. 3Lahorelow-cost sensorsPunjab, Pakistan
    23910.9×
  4. 4KolkataWest Bengal, India
    23010.3×
  5. 5Yerevanlow-cost sensorsYerevan, Armenia
    1978.1×
  6. 6Kampalalow-cost sensorsCentral Region, Uganda
    1887.2×
  7. 6CairoCairo, Egypt
    1887.2×
  8. 8Kathmandulow-cost sensorsBagmati Province, Nepal
    1846.9×
  9. 9DelhiDelhi, India
    1796.4×
  10. 10Novi PazarCentral Serbia, Serbia
    1756.0×
  11. 11Islamabadlow-cost sensorsIslamabad, Pakistan
    1756.0×
  12. 12DushanbeDushanbe, Tajikistan
    1725.7×
  13. 13SalorTashkent Region, Uzbekistan
    1655.0×
  14. 14Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1644.9×
  15. 15HanoiHanoi, Vietnam
    1594.5×
  16. 16Banja LukaSrpska, Bosnia and Herzegovina
    1574.3×
  17. 17ChennaiTamil Nadu, India
    1574.2×
  18. 18UžiceCentral Serbia, Serbia
    1574.2×
  19. 19CholulaPuebla, Mexico
    1554.1×
  20. 20LazarevacCentral Serbia, Serbia
    1554.1×
  21. 21BaghdadBaghdad, Iraq
    1554.1×
  22. 22PirotCentral Serbia, Serbia
    1544.0×
  23. 23NišCentral Serbia, Serbia
    1533.9×
  24. 24SarajevoFederation of B&H, Bosnia and Herzegovina
    1533.9×
  25. 25ÖstersundJämtland, Sweden
    1513.7×
  26. 26ShenyangLiaoning, China
    1473.6×
  27. 27ValjevoCentral Serbia, Serbia
    1463.6×
  28. 28KraljevoCentral Serbia, Serbia
    1443.5×
  29. 29AntananarivoAnalamanga, Madagascar
    1413.4×
  30. 30MumbaiMaharashtra, India
    1333.2×
  31. 31NegotinCentral Serbia, Serbia
    1273.1×
  32. 32BakersfieldCalifornia, United States
    1263.0×
  33. 33Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1263.0×
  34. 34HyderabadTelangana, India
    1233.0×
  35. 35ClovisCalifornia, United States
    1202.9×
  36. 36Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    1192.9×
  37. 37GuangzhouGuangdong, China
    1182.8×
  38. 38Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    1152.8×
  39. 39BellinzonaTicino, Switzerland
    1142.7×
  40. 40NacimientoBiobio, Chile
    1142.7×
  41. 41Abujalow-cost sensorsFCT, Nigeria
    1132.7×
  42. 42SmederevoCentral Serbia, Serbia
    1132.7×
  43. 43KigaliKigali, Rwanda
    1122.7×
  44. 44ColomboWestern Province, Sri Lanka
    1112.6×
  45. 45FresnoCalifornia, United States
    1102.6×
  46. 46Botevgradlow-cost sensorsSofia, Bulgaria
    1092.6×
  47. 47ObrenovacCentral Serbia, Serbia
    1092.6×
  48. 48Ciudad NezahualcoyotlMéxico, Mexico
    1082.6×
  49. 49ČačakCentral Serbia, Serbia
    1082.5×
  50. 50KragujevacCentral Serbia, Serbia
    1062.5×
  51. 51Santa Anita - Los FicusLima region, Peru
    982.3×
  52. 52TravnikFederation of B&H, Bosnia and Herzegovina
    982.3×
  53. 53ZemunCentral Serbia, Serbia
    972.3×
  54. 54PančevoVojvodina, Serbia
    972.3×
  55. 55MaderaCalifornia, United States
    962.2×
  56. 55PortervilleCalifornia, United States
    962.2×
  57. 57BakuBaki, Azerbaijan
    962.2×
  58. 58SremčicaCentral Serbia, Serbia
    952.2×
  59. 59BeijingBeijing, China
    942.2×
  60. 60TagawaFukuoka, Japan
    942.2×
  61. 61Los AngelesCalifornia, United States
    942.1×
  62. 62Accralow-cost sensorsGreater Accra, Ghana
    942.1×
  63. 63AstanaAstana, Kazakhstan
    942.1×
  64. 64HanfordCalifornia, United States
    932.1×
  65. 65BurbankCalifornia, United States
    932.1×
  66. 66LučenecBanská Bystrica Region, Slovakia
    932.1×
  67. 67DejCluj County, Romania
    932.1×
  68. 68Zagreblow-cost sensorsZagreb, Croatia
    922.1×
  69. 69PubalGyeonggi-do, South Korea
    922.1×
  70. 70Imperial BeachCalifornia, United States
    912.0×
  71. 71YangonYangon, Myanmar
    902.0×
  72. 71Medina Estateslow-cost sensorsGreater Accra, Ghana
    902.0×
  73. 71Silao de la VictoriaGuanajuato, Mexico
    902.0×
  74. 74FutogVojvodina, Serbia
    902.0×
  75. 75ZvolenBanská Bystrica Region, Slovakia
    902.0×
  76. 76Haskovolow-cost sensorsHaskovo, Bulgaria
    902.0×
  77. 77CoyhaiqueAysén, Chile
    892.0×
  78. 78Almatylow-cost sensorsAlmaty, Kazakhstan
    892.0×
  79. 79Jacobo HunterArequipa, Peru
    881.9×
  80. 80Liptovský Mikulᚎilina Region, Slovakia
    881.9×
  81. 81BelgradeCentral Serbia, Serbia
    871.9×
  82. 82JakartaJakarta, Indonesia
    861.9×
  83. 83Nong KhaemBangkok, Thailand
    861.8×
  84. 84Santa Monicalow-cost sensorsCalifornia, United States
    851.8×
  85. 85Khlong Sam WaBangkok, Thailand
    851.8×
  86. 86IrapuatoGuanajuato, Mexico
    851.8×
  87. 87Novi SadVojvodina, Serbia
    841.8×
  88. 88KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    831.8×
  89. 89Dimitrovgradlow-cost sensorsHaskovo, Bulgaria
    831.8×
  90. 89Tuen MunTuen Mun, Hong Kong
    831.8×
  91. 89Hawthornelow-cost sensorsCalifornia, United States
    831.8×
  92. 92Inglewoodlow-cost sensorsCalifornia, United States
    831.7×
  93. 93CorcoranCalifornia, United States
    821.7×
  94. 94Vientianelow-cost sensorsVientiane Prefecture, Laos
    821.7×
  95. 95ŻywiecSilesia, Poland
    821.7×
  96. 95San Luis de la PazGuanajuato, Mexico
    821.7×
  97. 97Istanbullow-cost sensorsIstanbul, Turkey
    811.7×
  98. 98JinchengFukien, Taiwan
    811.7×
  99. 98ChaozhouTaiwan, Taiwan
    811.7×
  100. 100Bang NaBangkok, Thailand
    801.6×
  101. 100Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    801.6×
  102. 100RacibórzSilesia, Poland
    801.6×
  103. 103Cluj-NapocaCluj County, Romania
    791.6×
  104. 103San Tung Chung HangIslands, Hong Kong
    791.6×
  105. 105Ecatepec de MorelosMéxico, Mexico
    791.6×
  106. 106MercedCalifornia, United States
    791.6×
  107. 107LuganoTicino, Switzerland
    791.6×
  108. 107Chula VistaCalifornia, United States
    791.6×
  109. 109Ganghwa-gunIncheon, South Korea
    781.6×
  110. 109PiscoIca, Peru
    781.6×
  111. 111PristinaPristina, Kosovo
    781.6×
  112. 111ComptonCalifornia, United States
    781.6×
  113. 113YeojuGyeonggi-do, South Korea
    781.6×
  114. 114Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    771.5×
  115. 114Lat KrabangBangkok, Thailand
    771.5×
  116. 116San DiegoCalifornia, United States
    771.5×
  117. 117TocopillaAntofagasta, Chile
    771.5×
  118. 117Bueng KumBangkok, Thailand
    771.5×
  119. 119PtujUrban Municipality of Ptuj, Slovenia
    771.5×
  120. 120Tin Shui WaiYuen Long, Hong Kong
    761.5×
  121. 120GyőrGyőr-Moson-Sopron, Hungary
    761.5×
  122. 122Mexico CityMexico City, Mexico
    761.5×
  123. 123Yangp'yŏngGyeonggi-do, South Korea
    761.5×
  124. 123CelayaGuanajuato, Mexico
    761.5×
  125. 123Carsonlow-cost sensorsCalifornia, United States
    761.5×
  126. 126QuillotaValparaiso, Chile
    761.5×
  127. 127AshgabatAshgabat, Turkmenistan
    761.5×
  128. 128Jastrzębie ZdrójSilesia, Poland
    751.5×
  129. 128Saphan SungBangkok, Thailand
    751.5×
  130. 130Wan ChaiWan Chai, Hong Kong
    751.5×
  131. 130Icheon-siGyeonggi-do, South Korea
    751.5×
  132. 132ThessaloníkiCentral Macedonia, Greece
    751.5×
  133. 133PyeongtaekGyeonggi-do, South Korea
    751.5×
  134. 133HarrisburgPennsylvania, United States
    751.5×
  135. 135Banská BystricaBanská Bystrica Region, Slovakia
    741.4×
  136. 135OstravaMoravian-Silesian Region, Czechia
    741.4×
  137. 135León de los AldamaGuanajuato, Mexico
    741.4×
  138. 138Sevlievolow-cost sensorsGabrovo, Bulgaria
    741.4×
  139. 138Ban Samae DamBangkok, Thailand
    741.4×
  140. 138MalackyBratislava Region, Slovakia
    741.4×
  141. 141AntofagastaAntofagasta, Chile
    741.4×
  142. 141El CajonCalifornia, United States
    741.4×
  143. 141Lak SiBangkok, Thailand
    741.4×
  144. 144Jurupa ValleyCalifornia, United States
    741.4×
  145. 145CodleaBrașov County, Romania
    741.4×
  146. 145YeongjuGyeongsangbuk-do, South Korea
    741.4×
  147. 145ChocopeLa Libertad, Peru
    741.4×
  148. 145Puente AltoSantiago Metropolitan, Chile
    741.4×
  149. 145CoquimboCoquimbo Region, Chile
    741.4×
  150. 150BangkokBangkok, Thailand
    741.4×
  151. 150Florinlow-cost sensorsCalifornia, United States
    741.4×
  152. 152Mong KokYau Tsim Mong District, Hong Kong
    731.4×
  153. 153KimjeJeollabuk-do, South Korea
    731.4×
  154. 153HongseongChungcheongnam-do, South Korea
    731.4×
  155. 153Žiar nad HronomBanská Bystrica Region, Slovakia
    731.4×
  156. 153Bielsko-BialaSilesia, Poland
    731.4×
  157. 157ĆuprijaCentral Serbia, Serbia
    731.4×
  158. 158YŏnmuChungcheongnam-do, South Korea
    731.4×
  159. 158Torrancelow-cost sensorsCalifornia, United States
    731.4×
  160. 160LebanonPennsylvania, United States
    731.4×
  161. 161AricaArica y Parinacota Region, Chile
    721.4×
  162. 162ShanghaiShanghai, China
    721.4×
  163. 162Agouralow-cost sensorsCalifornia, United States
    721.4×
  164. 162Khan Na YaoBangkok, Thailand
    721.4×
  165. 165YesanChungcheongnam-do, South Korea
    721.4×
  166. 165SeonghwanChungcheongnam-do, South Korea
    721.4×
  167. 167JeddahMecca Region, Saudi Arabia
    721.4×
  168. 167LimaLima Province, Peru
    721.4×
  169. 167ValdostaGeorgia, United States
    721.4×
  170. 170FanlingNorth District, Hong Kong
    711.3×
  171. 170OpavaMoravian-Silesian Region, Czechia
    711.3×
  172. 170La SerenaCoquimbo Region, Chile
    711.3×
  173. 173GumiGyeongsangbuk-do, South Korea
    711.3×
  174. 174VeszprémVeszprém, Hungary
    711.3×
  175. 174QuinteroValparaiso, Chile
    711.3×
  176. 176BorCentral Serbia, Serbia
    711.3×
  177. 176Gimpo-siGyeonggi-do, South Korea
    711.3×
  178. 176KatowiceSilesia, Poland
    711.3×
  179. 176HamarInnlandet, Norway
    711.3×
  180. 176SantiagoSantiago Metropolitan, Chile
    711.3×
  181. 181Ban Khlong PrawetBangkok, Thailand
    711.3×
  182. 181Quezon Citylow-cost sensorsNational Capital Region, Philippines
    711.3×
  183. 181ConcónValparaiso, Chile
    711.3×
  184. 184TřinecMoravian-Silesian Region, Czechia
    701.3×
  185. 184Columbialow-cost sensorsMissouri, United States
    701.3×
  186. 186Tai PoTai Po, Hong Kong
    701.3×
  187. 186KinzanChungcheongnam-do, South Korea
    701.3×
  188. 186Hwaseong-siGyeonggi-do, South Korea
    701.3×
  189. 186GrazStyria, Austria
    701.3×
  190. 186CuricóMaule Region, Chile
    701.3×
  191. 191PúchovTrenčín Region, Slovakia
    701.3×
  192. 191CopiapóAtacama, Chile
    701.3×
  193. 193Gabrovolow-cost sensorsGabrovo, Bulgaria
    701.3×
  194. 193OsanGyeonggi-do, South Korea
    701.3×
  195. 195YeongdongNorth Chungcheong, South Korea
    701.3×
  196. 195HwadoGyeonggi-do, South Korea
    701.3×
  197. 195RužomberokŽilina Region, Slovakia
    701.3×
  198. 195PhiladelphiaPennsylvania, United States
    701.3×
  199. 199GwangjuGyeonggi-do, South Korea
    691.3×
  200. 199Ansan-siGyeonggi-do, South Korea
    691.3×

Top 200 of 2,271 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

Not covered: the government monitoring networks of China and Turkey, which publish no terms that let us reuse their readings. Most cities there are missing from this board, not clean. Why.

Use this board

SmogRank, most polluted cities, PM2.5, December 9, 2024, smogrank.com/history/2024-12-09 (accessed 3 Oct 2026).

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