SmogRank / History / December 20, 2024

Most polluted cities on December 20, 2024

2,321 cities ranked by their average PM2.5 over the day; the worst was Delhi, India, at 332.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during December 20, 2024. All episodes.

← Delhi 332.0 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every city ranked for December 20, 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. 1DelhiDelhi, India
    500+22.1×
  2. 2Lahorelow-cost sensorsPunjab, Pakistan
    49921.7×
  3. 3N'DjamenaN’Djaména, Chad
    43519.5×
  4. 4Dhakalow-cost sensorsDhaka Division, Bangladesh
    29914.9×
  5. 5DushanbeDushanbe, Tajikistan
    26212.5×
  6. 6Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    24611.4×
  7. 7KolkataWest Bengal, India
    23710.8×
  8. 8Islamabadlow-cost sensorsIslamabad, Pakistan
    2249.9×
  9. 9BaghdadBaghdad, Iraq
    2098.9×
  10. 9NegotinCentral Serbia, Serbia
    2098.9×
  11. 11Ulan BatorUlaanbaatar, Mongolia
    1967.9×
  12. 12PirotCentral Serbia, Serbia
    1937.7×
  13. 13Novi PazarCentral Serbia, Serbia
    1927.6×
  14. 14MumbaiMaharashtra, India
    1907.4×
  15. 15KraljevoCentral Serbia, Serbia
    1796.4×
  16. 16Kathmandulow-cost sensorsBagmati Province, Nepal
    1766.1×
  17. 17Kampalalow-cost sensorsCentral Region, Uganda
    1735.8×
  18. 18ValjevoCentral Serbia, Serbia
    1675.2×
  19. 19CodleaBrașov County, Romania
    1675.2×
  20. 20Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    1624.8×
  21. 21ČačakCentral Serbia, Serbia
    1604.6×
  22. 22UžiceCentral Serbia, Serbia
    1604.5×
  23. 23SmederevoCentral Serbia, Serbia
    1574.3×
  24. 24AntananarivoAnalamanga, Madagascar
    1554.1×
  25. 25HyderabadTelangana, India
    1544.0×
  26. 26ShenyangLiaoning, China
    1544.0×
  27. 27NogalesSonora, Mexico
    1533.9×
  28. 28NišCentral Serbia, Serbia
    1533.8×
  29. 29Medina Estateslow-cost sensorsGreater Accra, Ghana
    1523.8×
  30. 30ThessaloníkiCentral Macedonia, Greece
    1513.7×
  31. 31Accralow-cost sensorsGreater Accra, Ghana
    1463.6×
  32. 32LazarevacCentral Serbia, Serbia
    1453.5×
  33. 33TijuanaBaja California, Mexico
    1423.5×
  34. 34Wan ChaiWan Chai, Hong Kong
    1423.5×
  35. 35ObrenovacCentral Serbia, Serbia
    1413.4×
  36. 36CraiovaDolj, Romania
    1403.4×
  37. 36PančevoVojvodina, Serbia
    1403.4×
  38. 36Tuen MunTuen Mun, Hong Kong
    1403.4×
  39. 39KragujevacCentral Serbia, Serbia
    1373.3×
  40. 40RuseRuse, Bulgaria
    1343.2×
  41. 41Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    1323.2×
  42. 42San Tung Chung HangIslands, Hong Kong
    1323.2×
  43. 42PubalGyeonggi-do, South Korea
    1323.2×
  44. 44BelgradeCentral Serbia, Serbia
    1313.2×
  45. 45Vientianelow-cost sensorsVientiane Prefecture, Laos
    1313.2×
  46. 46GuangzhouGuangdong, China
    1293.1×
  47. 47Tin Shui WaiYuen Long, Hong Kong
    1283.1×
  48. 48Nong KhaemBangkok, Thailand
    1273.1×
  49. 49GwangjuGyeonggi-do, South Korea
    1263.1×
  50. 50Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    1253.0×
  51. 51ZemunCentral Serbia, Serbia
    1253.0×
  52. 51Ganghwa-gunIncheon, South Korea
    1253.0×
  53. 53BucharestBucharest, Romania
    1202.9×
  54. 54AnseongGyeonggi-do, South Korea
    1202.9×
  55. 55Yerevanlow-cost sensorsYerevan, Armenia
    1182.8×
  56. 56Kwai ChungKwai Tsing District, Hong Kong
    1172.8×
  57. 57Mong KokYau Tsim Mong District, Hong Kong
    1172.8×
  58. 57SuwonGyeonggi-do, South Korea
    1172.8×
  59. 59SeonghwanChungcheongnam-do, South Korea
    1172.8×
  60. 60VictoriaCentral and Western, Hong Kong
    1152.8×
  61. 61Icheon-siGyeonggi-do, South Korea
    1152.7×
  62. 62Yangp'yŏngGyeonggi-do, South Korea
    1142.7×
  63. 63Santa Anita - Los FicusLima region, Peru
    1142.7×
  64. 64Tai PoTai Po, Hong Kong
    1132.7×
  65. 65HwadoGyeonggi-do, South Korea
    1122.7×
  66. 66BakersfieldCalifornia, United States
    1122.7×
  67. 67PyeongtaekGyeonggi-do, South Korea
    1112.6×
  68. 67Hwaseong-siGyeonggi-do, South Korea
    1112.6×
  69. 69SeosanChungcheongnam-do, South Korea
    1112.6×
  70. 70Tsuen WanTsuen Wan, Hong Kong
    1102.6×
  71. 70BadgerAlaska, United States
    1102.6×
  72. 72NogalesArizona, United States
    1102.6×
  73. 72Khlong Sam WaBangkok, Thailand
    1102.6×
  74. 74Sham Shui PoSham Shui Po District, Hong Kong
    1092.6×
  75. 75KigaliKigali, Rwanda
    1092.6×
  76. 76Goyang-siGyeonggi-do, South Korea
    1092.6×
  77. 76JungpyongNorth Chungcheong, South Korea
    1092.6×
  78. 78SeoulSeoul, South Korea
    1082.6×
  79. 79YŏnmuChungcheongnam-do, South Korea
    1082.6×
  80. 80ĆuprijaCentral Serbia, Serbia
    1072.5×
  81. 81Bang NaBangkok, Thailand
    1072.5×
  82. 81Sau Mau PingKwun Tong District, Hong Kong
    1072.5×
  83. 81Guri-siGyeonggi-do, South Korea
    1072.5×
  84. 81SejongSejong-si, South Korea
    1072.5×
  85. 85YeojuGyeonggi-do, South Korea
    1062.5×
  86. 86OsanGyeonggi-do, South Korea
    1062.5×
  87. 86TurlockCalifornia, United States
    1062.5×
  88. 88Sha TinSha Tin, Hong Kong
    1062.5×
  89. 89Uijeongbu-siGyeonggi-do, South Korea
    1052.5×
  90. 89IksanJeollabuk-do, South Korea
    1052.5×
  91. 89GwangmyeongGyeonggi-do, South Korea
    1052.5×
  92. 89XonacatlánMéxico, Mexico
    1052.5×
  93. 93BuyeoChungcheongnam-do, South Korea
    1042.5×
  94. 93Cheongju-siNorth Chungcheong, South Korea
    1042.5×
  95. 95YangjuGyeonggi-do, South Korea
    1032.4×
  96. 95Seongnam-siGyeonggi-do, South Korea
    1032.4×
  97. 95Bueng KumBangkok, Thailand
    1032.4×
  98. 98Gimpo-siGyeonggi-do, South Korea
    1022.4×
  99. 98WabuGyeonggi-do, South Korea
    1022.4×
  100. 98Palo Altolow-cost sensorsCalifornia, United States
    1022.4×
  101. 101HongseongChungcheongnam-do, South Korea
    1022.4×
  102. 101Anyang-siGyeonggi-do, South Korea
    1022.4×
  103. 103IncheonIncheon, South Korea
    1022.4×
  104. 103Ansan-siGyeonggi-do, South Korea
    1022.4×
  105. 103Lak SiBangkok, Thailand
    1022.4×
  106. 106NyíregyházaSzabolcs-Szatmár-Bereg, Hungary
    1012.4×
  107. 106TangjinChungcheongnam-do, South Korea
    1012.4×
  108. 108DejCluj County, Romania
    1012.4×
  109. 108Ban Samae DamBangkok, Thailand
    1012.4×
  110. 110Bucheon-siGyeonggi-do, South Korea
    1012.4×
  111. 111MunsanGyeonggi-do, South Korea
    1002.4×
  112. 112HanamGyeonggi-do, South Korea
    1002.3×
  113. 112ModestoCalifornia, United States
    1002.3×
  114. 114YangonYangon, Myanmar
    992.3×
  115. 114ShanghaiShanghai, China
    992.3×
  116. 116ChennaiTamil Nadu, India
    982.3×
  117. 117GunsanJeollabuk-do, South Korea
    982.3×
  118. 117NamyangjuGyeonggi-do, South Korea
    982.3×
  119. 119Mueang NonthaburiNonthaburi, Thailand
    962.2×
  120. 120KimjeJeollabuk-do, South Korea
    962.2×
  121. 120Chinch'ŏnNorth Chungcheong, South Korea
    962.2×
  122. 122BangkokBangkok, Thailand
    952.2×
  123. 123KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    942.1×
  124. 124Sevlievolow-cost sensorsGabrovo, Bulgaria
    942.1×
  125. 124Sai MaiBangkok, Thailand
    942.1×
  126. 126YesanChungcheongnam-do, South Korea
    932.1×
  127. 127SremčicaCentral Serbia, Serbia
    932.1×
  128. 127Khan Na YaoBangkok, Thailand
    932.1×
  129. 129WŏnjuGangwon-do, South Korea
    932.1×
  130. 129NonsanChungcheongnam-do, South Korea
    932.1×
  131. 131Cluj-NapocaCluj County, Romania
    922.1×
  132. 132CheonanChungcheongnam-do, South Korea
    912.1×
  133. 133AsanChungcheongnam-do, South Korea
    912.0×
  134. 134KinzanChungcheongnam-do, South Korea
    912.0×
  135. 134ChungjuNorth Chungcheong, South Korea
    912.0×
  136. 136MantecaCalifornia, United States
    892.0×
  137. 136Saphan SungBangkok, Thailand
    892.0×
  138. 138Los AngelesCalifornia, United States
    892.0×
  139. 139ChiguayanteBiobio, Chile
    892.0×
  140. 140GumiGyeongsangbuk-do, South Korea
    892.0×
  141. 141Haskovolow-cost sensorsHaskovo, Bulgaria
    881.9×
  142. 141TalaganteSantiago Metropolitan, Chile
    881.9×
  143. 143Lat KrabangBangkok, Thailand
    881.9×
  144. 144MiskolcBorsod-Abaúj-Zemplén, Hungary
    881.9×
  145. 144BoryeongChungcheongnam-do, South Korea
    881.9×
  146. 144KoesanNorth Chungcheong, South Korea
    881.9×
  147. 147Bang KapiBangkok, Thailand
    881.9×
  148. 148Hongch’ŏnGangwon-do, South Korea
    871.9×
  149. 148Puente AltoSantiago Metropolitan, Chile
    871.9×
  150. 150SantiagoSantiago Metropolitan, Chile
    871.9×
  151. 151Addis AbabaAddis Ababa, Ethiopia
    871.9×
  152. 152MasanGwangju, South Korea
    871.9×
  153. 153Ban Khlong PrawetBangkok, Thailand
    861.9×
  154. 154BurbankCalifornia, United States
    861.9×
  155. 155OkcheonNorth Chungcheong, South Korea
    861.9×
  156. 156Dimitrovgradlow-cost sensorsHaskovo, Bulgaria
    861.9×
  157. 156NamsaJeollabuk-do, South Korea
    861.9×
  158. 158LučenecBanská Bystrica Region, Slovakia
    861.8×
  159. 159BakuBaki, Azerbaijan
    851.8×
  160. 159IaşiIași County, Romania
    851.8×
  161. 159ChuncheonGangwon-do, South Korea
    851.8×
  162. 162QuinteroValparaiso, Chile
    851.8×
  163. 163YeongdongNorth Chungcheong, South Korea
    841.8×
  164. 164GongjuChungcheongnam-do, South Korea
    841.8×
  165. 165MillcreekUtah, United States
    841.8×
  166. 166ChaozhouTaiwan, Taiwan
    831.8×
  167. 167QuillotaValparaiso, Chile
    831.8×
  168. 168YeongjuGyeongsangbuk-do, South Korea
    831.7×
  169. 169WanjuJeollabuk-do, South Korea
    831.7×
  170. 169BuanJeollabuk-do, South Korea
    831.7×
  171. 171Carsonlow-cost sensorsCalifornia, United States
    821.7×
  172. 172SofiaSofia-Capital, Bulgaria
    821.7×
  173. 173BeijingBeijing, China
    821.7×
  174. 173Sunnyvalelow-cost sensorsCalifornia, United States
    821.7×
  175. 175NajuJeollanam-do, South Korea
    811.7×
  176. 175GimcheonGyeongsangbuk-do, South Korea
    811.7×
  177. 177Istanbullow-cost sensorsIstanbul, Turkey
    811.7×
  178. 177TracyCalifornia, United States
    811.7×
  179. 179NangenJeollabuk-do, South Korea
    801.7×
  180. 180Hawthornelow-cost sensorsCalifornia, United States
    801.6×
  181. 180San JoseCalifornia, United States
    801.6×
  182. 180PocatelloIdaho, United States
    801.6×
  183. 183GwangjuGwangju, South Korea
    801.6×
  184. 183ImsilJeollabuk-do, South Korea
    801.6×
  185. 185SzegedCsongrád, Hungary
    801.6×
  186. 185Nong ChokBangkok, Thailand
    801.6×
  187. 187SangjuGyeongsangbuk-do, South Korea
    801.6×
  188. 188NacimientoBiobio, Chile
    791.6×
  189. 189Jacobo HunterArequipa, Peru
    791.6×
  190. 190Inglewoodlow-cost sensorsCalifornia, United States
    781.6×
  191. 190South San Franciscolow-cost sensorsCalifornia, United States
    781.6×
  192. 192Taesal-liChungcheongnam-do, South Korea
    781.6×
  193. 192AgüimesCanary Islands, Spain
    781.6×
  194. 192AnaheimCalifornia, United States
    781.6×
  195. 195Torrancelow-cost sensorsCalifornia, United States
    781.6×
  196. 196Santa Cruz de TenerifeCanary Islands, Spain
    771.5×
  197. 197AsprópyrgosAttica, Greece
    771.5×
  198. 197MaspalomasCanary Islands, Spain
    771.5×
  199. 197LugoGalicia, Spain
    771.5×
  200. 197Ciudad NezahualcoyotlMéxico, Mexico
    771.5×

Top 200 of 2,321 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 20, 2024, smogrank.com/history/2024-12-20 (accessed 3 Oct 2026).

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