SmogRank / History / December 21, 2024

Most polluted cities on December 21, 2024

2,296 cities ranked by their average PM2.5 over the day; the worst was Lahore, Pakistan, at 281.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during December 21, 2024. All episodes.

← Lahore 281.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for December 21, 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. 1Lahorelow-cost sensorsPunjab, Pakistan
    41218.7×
  2. 2Dhakalow-cost sensorsDhaka Division, Bangladesh
    38217.7×
  3. 3Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    33416.1×
  4. 4DelhiDelhi, India
    30215.1×
  5. 5Ulan BatorUlaanbaatar, Mongolia
    25211.8×
  6. 6DushanbeDushanbe, Tajikistan
    24611.4×
  7. 7Islamabadlow-cost sensorsIslamabad, Pakistan
    24311.2×
  8. 8N'DjamenaN’Djaména, Chad
    23610.7×
  9. 9KolkataWest Bengal, India
    1998.3×
  10. 10NogalesSonora, Mexico
    1937.7×
  11. 11MumbaiMaharashtra, India
    1887.2×
  12. 12HyderabadTelangana, India
    1806.5×
  13. 13Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    1725.7×
  14. 14Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    1715.6×
  15. 15Kampalalow-cost sensorsCentral Region, Uganda
    1675.2×
  16. 16CairoCairo, Egypt
    1665.1×
  17. 16Accralow-cost sensorsGreater Accra, Ghana
    1665.1×
  18. 18Kathmandulow-cost sensorsBagmati Province, Nepal
    1614.6×
  19. 19ShanghaiShanghai, China
    1594.5×
  20. 20AntananarivoAnalamanga, Madagascar
    1574.2×
  21. 20Medina Estateslow-cost sensorsGreater Accra, Ghana
    1574.2×
  22. 22Yerevanlow-cost sensorsYerevan, Armenia
    1564.2×
  23. 23Banja LukaSrpska, Bosnia and Herzegovina
    1544.0×
  24. 24TijuanaBaja California, Mexico
    1513.7×
  25. 25BadgerAlaska, United States
    1493.7×
  26. 26ValjevoCentral Serbia, Serbia
    1433.5×
  27. 27Nong KhaemBangkok, Thailand
    1393.4×
  28. 28Yangp'yŏngGyeonggi-do, South Korea
    1273.1×
  29. 29Novi PazarCentral Serbia, Serbia
    1263.0×
  30. 30Ban Samae DamBangkok, Thailand
    1253.0×
  31. 30Bang NaBangkok, Thailand
    1253.0×
  32. 30WabuGyeonggi-do, South Korea
    1253.0×
  33. 33HwadoGyeonggi-do, South Korea
    1243.0×
  34. 34PubalGyeonggi-do, South Korea
    1243.0×
  35. 35Lak SiBangkok, Thailand
    1233.0×
  36. 35Khlong Sam WaBangkok, Thailand
    1233.0×
  37. 37SalorTashkent Region, Uzbekistan
    1222.9×
  38. 38Tuen MunTuen Mun, Hong Kong
    1202.9×
  39. 39Mueang NonthaburiNonthaburi, Thailand
    1172.8×
  40. 39Jurupa ValleyCalifornia, United States
    1172.8×
  41. 41BangkokBangkok, Thailand
    1162.8×
  42. 41YeojuGyeonggi-do, South Korea
    1162.8×
  43. 43Icheon-siGyeonggi-do, South Korea
    1162.8×
  44. 44CheorwonGangwon-do, South Korea
    1142.7×
  45. 45GwangjuGyeonggi-do, South Korea
    1142.7×
  46. 46Santa Anita - Los FicusLima region, Peru
    1142.7×
  47. 47ChungjuNorth Chungcheong, South Korea
    1132.7×
  48. 48Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1132.7×
  49. 48Bueng KumBangkok, Thailand
    1132.7×
  50. 50MilduraVictoria, Australia
    1122.7×
  51. 51YangonYangon, Myanmar
    1112.6×
  52. 51YeongjuGyeongsangbuk-do, South Korea
    1112.6×
  53. 53Guri-siGyeonggi-do, South Korea
    1102.6×
  54. 54NamyangjuGyeonggi-do, South Korea
    1092.6×
  55. 55Sai MaiBangkok, Thailand
    1092.6×
  56. 56SeoulSeoul, South Korea
    1092.6×
  57. 57BakersfieldCalifornia, United States
    1082.6×
  58. 58WŏnjuGangwon-do, South Korea
    1082.6×
  59. 58SuwonGyeonggi-do, South Korea
    1082.6×
  60. 60Uijeongbu-siGyeonggi-do, South Korea
    1082.5×
  61. 61Hongch’ŏnGangwon-do, South Korea
    1072.5×
  62. 62HanamGyeonggi-do, South Korea
    1072.5×
  63. 63Bang KapiBangkok, Thailand
    1072.5×
  64. 63JungpyongNorth Chungcheong, South Korea
    1072.5×
  65. 65Wan ChaiWan Chai, Hong Kong
    1072.5×
  66. 66Goyang-siGyeonggi-do, South Korea
    1062.5×
  67. 67ChennaiTamil Nadu, India
    1062.5×
  68. 68MunsanGyeonggi-do, South Korea
    1052.5×
  69. 68GwangmyeongGyeonggi-do, South Korea
    1052.5×
  70. 70AshgabatAshgabat, Turkmenistan
    1042.5×
  71. 70Tin Shui WaiYuen Long, Hong Kong
    1042.5×
  72. 72GumiGyeongsangbuk-do, South Korea
    1042.5×
  73. 72AnseongGyeonggi-do, South Korea
    1042.5×
  74. 74NogalesArizona, United States
    1042.4×
  75. 75OsanGyeonggi-do, South Korea
    1032.4×
  76. 75Khan Na YaoBangkok, Thailand
    1032.4×
  77. 77BaghdadBaghdad, Iraq
    1032.4×
  78. 77KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    1032.4×
  79. 79Chinch'ŏnNorth Chungcheong, South Korea
    1032.4×
  80. 79Seongnam-siGyeonggi-do, South Korea
    1032.4×
  81. 81KoesanNorth Chungcheong, South Korea
    1022.4×
  82. 82PyeongtaekGyeonggi-do, South Korea
    1022.4×
  83. 83ManlleuCatalonia, Spain
    1022.4×
  84. 84KigaliKigali, Rwanda
    1012.4×
  85. 84ChuncheonGangwon-do, South Korea
    1012.4×
  86. 86San Tung Chung HangIslands, Hong Kong
    1012.4×
  87. 87Gimpo-siGyeonggi-do, South Korea
    1002.4×
  88. 88RiversideCalifornia, United States
    1002.4×
  89. 89Lat KrabangBangkok, Thailand
    1002.3×
  90. 90SeonghwanChungcheongnam-do, South Korea
    992.3×
  91. 90Bucheon-siGyeonggi-do, South Korea
    992.3×
  92. 92Anyang-siGyeonggi-do, South Korea
    992.3×
  93. 93GapyeongGyeonggi-do, South Korea
    992.3×
  94. 94GuangzhouGuangdong, China
    982.3×
  95. 95YangjuGyeonggi-do, South Korea
    982.3×
  96. 95Cheongju-siNorth Chungcheong, South Korea
    982.3×
  97. 97Saphan SungBangkok, Thailand
    982.3×
  98. 98Ban Khlong PrawetBangkok, Thailand
    982.3×
  99. 98HwacheonGangwon-do, South Korea
    982.3×
  100. 100Ganghwa-gunIncheon, South Korea
    982.3×
  101. 101EdmontonAlberta, Canada
    972.3×
  102. 102YeongdongNorth Chungcheong, South Korea
    972.2×
  103. 103Florinlow-cost sensorsCalifornia, United States
    962.2×
  104. 104KinzanChungcheongnam-do, South Korea
    952.2×
  105. 105Nong ChokBangkok, Thailand
    952.2×
  106. 106MungyeongGyeongsangbuk-do, South Korea
    942.2×
  107. 107Ansan-siGyeonggi-do, South Korea
    942.1×
  108. 108TangjinChungcheongnam-do, South Korea
    932.1×
  109. 109FontanaCalifornia, United States
    932.1×
  110. 110IncheonIncheon, South Korea
    932.1×
  111. 111NeietsuGangwon-do, South Korea
    932.1×
  112. 112ShenyangLiaoning, China
    922.1×
  113. 113AndongGyeongsangbuk-do, South Korea
    912.1×
  114. 114SangjuGyeongsangbuk-do, South Korea
    912.0×
  115. 114MillcreekUtah, United States
    912.0×
  116. 116JangseongJeollanam-do, South Korea
    912.0×
  117. 117MizuhoGifu, Japan
    902.0×
  118. 118Vientianelow-cost sensorsVientiane Prefecture, Laos
    902.0×
  119. 119BakuBaki, Azerbaijan
    902.0×
  120. 119AsanChungcheongnam-do, South Korea
    902.0×
  121. 119SarajevoFederation of B&H, Bosnia and Herzegovina
    902.0×
  122. 122ChaozhouTaiwan, Taiwan
    902.0×
  123. 122Tai PoTai Po, Hong Kong
    902.0×
  124. 122Hwaseong-siGyeonggi-do, South Korea
    902.0×
  125. 122SantiagoSantiago Metropolitan, Chile
    902.0×
  126. 126PohangGyeongsangbuk-do, South Korea
    902.0×
  127. 126SejongSejong-si, South Korea
    902.0×
  128. 128GimcheonGyeongsangbuk-do, South Korea
    892.0×
  129. 129Kwai ChungKwai Tsing District, Hong Kong
    881.9×
  130. 130PhoenixArizona, United States
    881.9×
  131. 131DhahranEastern Province, Saudi Arabia
    881.9×
  132. 132Mong KokYau Tsim Mong District, Hong Kong
    881.9×
  133. 133Zagreblow-cost sensorsZagreb, Croatia
    881.9×
  134. 134YecheonGyeongsangbuk-do, South Korea
    871.9×
  135. 135CheonanChungcheongnam-do, South Korea
    871.9×
  136. 136JinchengFukien, Taiwan
    871.9×
  137. 137WaegwanGyeongsangbuk-do, South Korea
    861.9×
  138. 138Tsuen WanTsuen Wan, Hong Kong
    861.9×
  139. 139ChiguayanteBiobio, Chile
    861.9×
  140. 140Cheongsong gunGyeongsangbuk-do, South Korea
    861.8×
  141. 141ZgierzŁódź Voivodeship, Poland
    851.8×
  142. 142Puente AltoSantiago Metropolitan, Chile
    851.8×
  143. 143Sha TinSha Tin, Hong Kong
    851.8×
  144. 143YangguGangwon-do, South Korea
    851.8×
  145. 143MaderaCalifornia, United States
    851.8×
  146. 146BurbankCalifornia, United States
    851.8×
  147. 147OkcheonNorth Chungcheong, South Korea
    851.8×
  148. 147WoodlandCalifornia, United States
    851.8×
  149. 149MantecaCalifornia, United States
    841.8×
  150. 150Gyeongsan-siGyeongsangbuk-do, South Korea
    841.8×
  151. 151Sevlievolow-cost sensorsGabrovo, Bulgaria
    841.8×
  152. 152HongseongChungcheongnam-do, South Korea
    841.8×
  153. 153AnaheimCalifornia, United States
    831.8×
  154. 154Sham Shui PoSham Shui Po District, Hong Kong
    831.8×
  155. 154West JordanUtah, United States
    831.8×
  156. 156BuyeoChungcheongnam-do, South Korea
    831.7×
  157. 156VictoriaCentral and Western, Hong Kong
    831.7×
  158. 156TurlockCalifornia, United States
    831.7×
  159. 159YeonilGyeongsangbuk-do, South Korea
    821.7×
  160. 159NonsanChungcheongnam-do, South Korea
    821.7×
  161. 159KunwiGyeongsangbuk-do, South Korea
    821.7×
  162. 159GongjuChungcheongnam-do, South Korea
    821.7×
  163. 163BihaćFederation of B&H, Bosnia and Herzegovina
    821.7×
  164. 164Sau Mau PingKwun Tong District, Hong Kong
    821.7×
  165. 165GangneungGangwon-do, South Korea
    821.7×
  166. 165FresnoCalifornia, United States
    821.7×
  167. 167Los AngelesCalifornia, United States
    821.7×
  168. 167Salt Lake CityUtah, United States
    821.7×
  169. 169Skarżysko-KamiennaŚwiętokrzyskie, Poland
    821.7×
  170. 169YŏnmuChungcheongnam-do, South Korea
    821.7×
  171. 171Istanbullow-cost sensorsIstanbul, Turkey
    811.7×
  172. 171NacimientoBiobio, Chile
    811.7×
  173. 171MercedCalifornia, United States
    811.7×
  174. 174Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    811.7×
  175. 174MielecSubcarpathia, Poland
    811.7×
  176. 174YesanChungcheongnam-do, South Korea
    811.7×
  177. 177EisenGyeongsangbuk-do, South Korea
    811.7×
  178. 177BoryeongChungcheongnam-do, South Korea
    811.7×
  179. 179DębicaSubcarpathia, Poland
    801.7×
  180. 179KaohsiungTakao, Taiwan
    801.7×
  181. 181HayangGyeongsangbuk-do, South Korea
    801.7×
  182. 182UžiceCentral Serbia, Serbia
    801.6×
  183. 183ClovisCalifornia, United States
    801.6×
  184. 183Grande PrairieAlberta, Canada
    801.6×
  185. 185Addis AbabaAddis Ababa, Ethiopia
    801.6×
  186. 185JarosławSubcarpathia, Poland
    801.6×
  187. 187MiskolcBorsod-Abaúj-Zemplén, Hungary
    791.6×
  188. 187AugustówPodlasie, Poland
    791.6×
  189. 189DaeguDaegu, South Korea
    791.6×
  190. 189Torrejón de ArdozMadrid, Spain
    791.6×
  191. 189BoseongJeollanam-do, South Korea
    791.6×
  192. 192PoriSatakunta, Finland
    791.6×
  193. 193RzeszówSubcarpathia, Poland
    781.6×
  194. 193NiskoSubcarpathia, Poland
    781.6×
  195. 193LazarevacCentral Serbia, Serbia
    781.6×
  196. 196KraljevoCentral Serbia, Serbia
    781.6×
  197. 197PrzemyślSubcarpathia, Poland
    781.6×
  198. 197GaltCalifornia, United States
    781.6×
  199. 199CeljeUrban Municipality of Celje, Slovenia
    781.6×
  200. 199Columbialow-cost sensorsMissouri, United States
    781.6×

Top 200 of 2,296 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 21, 2024, smogrank.com/history/2024-12-21 (accessed 3 Oct 2026).

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