SmogRank / History / January 20, 2024

Most polluted cities on January 20, 2024

2,130 cities ranked by their average PM2.5 over the day; the worst was Peshawar, Pakistan, at 355.0 µg/m³. Each city's own local calendar day.

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

← Peshawar 355.0 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every city ranked for January 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. 1Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    500+23.7×
  2. 2N'DjamenaN’Djaména, Chad
    47320.8×
  3. 3Lahorelow-cost sensorsPunjab, Pakistan
    39218.1×
  4. 4Dhakalow-cost sensorsDhaka Division, Bangladesh
    31615.5×
  5. 5DelhiDelhi, India
    28714.1×
  6. 6KolkataWest Bengal, India
    28514.0×
  7. 7Islamabadlow-cost sensorsIslamabad, Pakistan
    26912.9×
  8. 8CairoCairo, Egypt
    2048.6×
  9. 9Karachilow-cost sensorsSindh, Pakistan
    1978.1×
  10. 10MumbaiMaharashtra, India
    1897.3×
  11. 11DushanbeDushanbe, Tajikistan
    1816.5×
  12. 12Abujalow-cost sensorsFCT, Nigeria
    1725.7×
  13. 13AstanaAstana, Kazakhstan
    1715.6×
  14. 14SalorTashkent Region, Uzbekistan
    1695.4×
  15. 15Kathmandulow-cost sensorsBagmati Province, Nepal
    1675.3×
  16. 16Lop BuriLopburi, Thailand
    1594.4×
  17. 17Sing BuriSing Buri, Thailand
    1594.4×
  18. 18Bang NaBangkok, Thailand
    1574.2×
  19. 19Khlong Sam WaBangkok, Thailand
    1564.2×
  20. 20Lat KrabangBangkok, Thailand
    1564.2×
  21. 21Nong KhaemBangkok, Thailand
    1564.2×
  22. 22Bang KapiBangkok, Thailand
    1564.2×
  23. 23Bueng KumBangkok, Thailand
    1564.1×
  24. 24Chai NatChai Nat, Thailand
    1554.1×
  25. 25YangonYangon, Myanmar
    1544.0×
  26. 26Samut SakhonSamut Sakhon, Thailand
    1544.0×
  27. 27Banja LukaSrpska, Bosnia and Herzegovina
    1544.0×
  28. 28Suphan BuriSuphan Buri, Thailand
    1533.9×
  29. 29Khlong LuangPathum Thani, Thailand
    1533.9×
  30. 30Ban Samae DamBangkok, Thailand
    1523.8×
  31. 31Khan Na YaoBangkok, Thailand
    1523.8×
  32. 32RatchaburiRatchaburi, Thailand
    1523.8×
  33. 33Saphan SungBangkok, Thailand
    1523.8×
  34. 34Lak SiBangkok, Thailand
    1513.7×
  35. 35KanchanaburiKanchanaburi, Thailand
    1513.7×
  36. 36Si Maha PhotPrachin Buri, Thailand
    1493.7×
  37. 37Ban Khlong PrawetBangkok, Thailand
    1483.6×
  38. 37Bang Bo DistrictSamut Prakan, Thailand
    1483.6×
  39. 39Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    1473.6×
  40. 40AranyaprathetSa Kaeo, Thailand
    1463.6×
  41. 41Nong ChokBangkok, Thailand
    1443.5×
  42. 42DěčínÚstí nad Labem Region, Czechia
    1433.5×
  43. 43BangkokBangkok, Thailand
    1403.4×
  44. 44Phra PradaengSamut Prakan, Thailand
    1393.4×
  45. 45Laem ChabangChon Buri, Thailand
    1373.4×
  46. 46Nakhon SawanNakhon Sawan, Thailand
    1363.3×
  47. 47KigaliKigali, Rwanda
    1353.3×
  48. 48SukhothaiSukhothai, Thailand
    1343.3×
  49. 49Nakhon PathomNakhon Pathom, Thailand
    1333.2×
  50. 50Sai MaiBangkok, Thailand
    1333.2×
  51. 51Ban ChangRayong, Thailand
    1323.2×
  52. 52Mueang NonthaburiNonthaburi, Thailand
    1313.2×
  53. 53RayongRayong, Thailand
    1293.1×
  54. 54PorsgrunnTelemark, Norway
    1273.1×
  55. 55Nakhon RatchasimaNakhon Ratchasima, Thailand
    1273.1×
  56. 56Ban Talat BuengChon Buri, Thailand
    1263.0×
  57. 57SaraburiSaraburi, Thailand
    1243.0×
  58. 58KalasinKalasin, Thailand
    1222.9×
  59. 59Ubon RatchathaniUbon Ratchathani, Thailand
    1212.9×
  60. 60Samut PrakanSamut Prakan, Thailand
    1192.9×
  61. 60LoeiLoei, Thailand
    1192.9×
  62. 62HyderabadTelangana, India
    1192.8×
  63. 63TratTrat, Thailand
    1172.8×
  64. 64PhichitPhichit, Thailand
    1152.7×
  65. 65SremčicaCentral Serbia, Serbia
    1152.7×
  66. 66Hua HinPrachuap Khiri Khan, Thailand
    1142.7×
  67. 67KłodzkoLower Silesia, Poland
    1122.7×
  68. 67PljevljaPljevlja, Montenegro
    1122.7×
  69. 69DrammenBuskerud, Norway
    1112.6×
  70. 70Ulan BatorUlaanbaatar, Mongolia
    1112.6×
  71. 71SarajevoFederation of B&H, Bosnia and Herzegovina
    1102.6×
  72. 72LampangLampang, Thailand
    1102.6×
  73. 73LazarevacCentral Serbia, Serbia
    1102.6×
  74. 74Almatylow-cost sensorsAlmaty, Kazakhstan
    1082.6×
  75. 75Khon KaenKhon Kaen, Thailand
    1082.5×
  76. 76TarbesOccitanie, France
    1062.5×
  77. 77BeijingBeijing, China
    1062.5×
  78. 77Valašské MeziříčíZlín, Czechia
    1062.5×
  79. 79RanongRanong province, Thailand
    1052.5×
  80. 79Mae SotTak, Thailand
    1052.5×
  81. 81ShenyangLiaoning, China
    1052.5×
  82. 82UttaraditUttaradit, Thailand
    1052.5×
  83. 83YasothonYasothon, Thailand
    1032.4×
  84. 84Wan ChaiWan Chai, Hong Kong
    1022.4×
  85. 84SpeyerRheinland-Pfalz, Germany
    1022.4×
  86. 84Ludwigshafen am RheinRheinland-Pfalz, Germany
    1022.4×
  87. 87LillestrømAkershus, Norway
    1012.4×
  88. 88PančevoVojvodina, Serbia
    1002.3×
  89. 89EtwatwaGauteng, South Africa
    992.3×
  90. 90Grande PrairieAlberta, Canada
    992.3×
  91. 91PhraePhrae, Thailand
    992.3×
  92. 92PhetchabunPhetchabun, Thailand
    982.3×
  93. 93ChennaiTamil Nadu, India
    982.3×
  94. 93HanoiHanoi, Vietnam
    982.3×
  95. 93ChanthaburiChanthaburi, Thailand
    982.3×
  96. 96Udon ThaniUdon Thani, Thailand
    972.3×
  97. 96NanNan, Thailand
    972.3×
  98. 96MannheimBaden-Wurttemberg, Germany
    972.3×
  99. 99Si Sa KetSi Sa Ket, Thailand
    972.3×
  100. 100WormsRheinland-Pfalz, Germany
    972.2×
  101. 100CalexicoCalifornia, United States
    972.2×
  102. 102ChaiyaphumChaiyaphum, Thailand
    962.2×
  103. 102ZlínZlín, Czechia
    962.2×
  104. 104ZemunCentral Serbia, Serbia
    962.2×
  105. 105MiskolcBorsod-Abaúj-Zemplén, Hungary
    962.2×
  106. 105SurinSurin, Thailand
    962.2×
  107. 105CalgaryAlberta, Canada
    962.2×
  108. 108HualpénBiobio, Chile
    952.2×
  109. 108LimaLima Province, Peru
    952.2×
  110. 110BakuBaki, Azerbaijan
    942.1×
  111. 111ForbachGrand Est, France
    922.1×
  112. 112Kamphaeng PhetKamphaeng Phet, Thailand
    902.0×
  113. 113AirdrieAlberta, Canada
    902.0×
  114. 114BelgradeCentral Serbia, Serbia
    892.0×
  115. 115PřerovOlomouc Region, Czechia
    892.0×
  116. 115OlomoucOlomouc Region, Czechia
    892.0×
  117. 117Nong Bua LamphuNong Bua Lamphu, Thailand
    892.0×
  118. 117RennesBrittany, France
    892.0×
  119. 119AthensAttica, Greece
    892.0×
  120. 120CastresOccitanie, France
    881.9×
  121. 121LampertheimHesse, Germany
    881.9×
  122. 121BensheimHesse, Germany
    881.9×
  123. 121LewistonIdaho, United States
    881.9×
  124. 124CallaoCallao, Peru
    881.9×
  125. 125QuinteroValparaiso, Chile
    881.9×
  126. 126PátraWest Greece, Greece
    871.9×
  127. 126ThionvilleGrand Est, France
    871.9×
  128. 126RužomberokŽilina Region, Slovakia
    871.9×
  129. 126FredrikstadØstfold, Norway
    871.9×
  130. 130VerdunGrand Est, France
    871.9×
  131. 130PauNew Aquitaine, France
    871.9×
  132. 130GivorsAuvergne-Rhône-Alpes, France
    871.9×
  133. 133DarmstadtHesse, Germany
    871.9×
  134. 134AsprópyrgosAttica, Greece
    871.9×
  135. 134SatunSatun, Thailand
    871.9×
  136. 136MukdahanMukdahan, Thailand
    861.9×
  137. 136Tuen MunTuen Mun, Hong Kong
    861.9×
  138. 136KehlBaden-Wurttemberg, Germany
    861.9×
  139. 139ŽilinaŽilina Region, Slovakia
    861.9×
  140. 139Santa Anita - Los FicusLima region, Peru
    861.9×
  141. 141SantiagoSantiago Metropolitan, Chile
    861.9×
  142. 142ParedesPorto, Portugal
    861.9×
  143. 143Buri RamBuriram, Thailand
    861.8×
  144. 143ReutlingenBaden-Wurttemberg, Germany
    861.8×
  145. 145DieppeNormandy, France
    851.8×
  146. 145HamarInnlandet, Norway
    851.8×
  147. 147StuttgartBaden-Wurttemberg, Germany
    851.8×
  148. 147MetzGrand Est, France
    851.8×
  149. 147Fos-sur-MerProvence-Alpes-Côte d'Azur, France
    851.8×
  150. 147TřinecMoravian-Silesian Region, Czechia
    851.8×
  151. 147ZgierzŁódź Voivodeship, Poland
    851.8×
  152. 147TocopillaAntofagasta, Chile
    851.8×
  153. 153BadgerAlaska, United States
    851.8×
  154. 154FilderstadtBaden-Wurttemberg, Germany
    851.8×
  155. 155DillingenSaarland, Germany
    851.8×
  156. 156RouenNormandy, France
    841.8×
  157. 156Red DeerAlberta, Canada
    841.8×
  158. 158TalaganteSantiago Metropolitan, Chile
    841.8×
  159. 159Hanau am MainHesse, Germany
    841.8×
  160. 159LunévilleGrand Est, France
    841.8×
  161. 159GardanneProvence-Alpes-Côte d'Azur, France
    841.8×
  162. 162EschbornHesse, Germany
    841.8×
  163. 162Romans-sur-IsèreAuvergne-Rhône-Alpes, France
    841.8×
  164. 164GuangzhouGuangdong, China
    831.8×
  165. 164OsloOslo, Norway
    831.8×
  166. 164Puente AltoSantiago Metropolitan, Chile
    831.8×
  167. 167Spišská Nová VesKošice Region, Slovakia
    831.8×
  168. 167Roi EtRoi Et, Thailand
    831.8×
  169. 169Rüsselsheim am MainHesse, Germany
    831.8×
  170. 170KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    831.7×
  171. 170SaarbrückenSaarland, Germany
    831.7×
  172. 170KarlsruheBaden-Wurttemberg, Germany
    831.7×
  173. 170Frankfurt am MainHesse, Germany
    831.7×
  174. 170LuxembourgLuxembourg, Luxembourg
    831.7×
  175. 175TübingenBaden-Wurttemberg, Germany
    831.7×
  176. 175TooeleUtah, United States
    831.7×
  177. 177IaşiIași County, Romania
    821.7×
  178. 177MaarssenUtrecht, The Netherlands
    821.7×
  179. 177Le HavreNormandy, France
    821.7×
  180. 180AmmanAmman, Jordan
    821.7×
  181. 180Surat ThaniSurat Thani, Thailand
    821.7×
  182. 182Limburg an der LahnHesse, Germany
    821.7×
  183. 182Sainte-Geneviève-des-BoisÎle-de-France, France
    821.7×
  184. 182PrievidzaTrenčín Region, Slovakia
    821.7×
  185. 182OurenseGalicia, Spain
    821.7×
  186. 186Kędzierzyn-KoźleOpole Voivodeship, Poland
    821.7×
  187. 187LouviersNormandy, France
    821.7×
  188. 188TrierRheinland-Pfalz, Germany
    811.7×
  189. 188MainzRheinland-Pfalz, Germany
    811.7×
  190. 188QuillotaValparaiso, Chile
    811.7×
  191. 191KatowiceSilesia, Poland
    811.7×
  192. 192Nakhon NayokNakhon Nayok, Thailand
    811.7×
  193. 193PassauBavaria, Germany
    801.7×
  194. 194Esch-sur-AlzetteEsch-sur-Alzette, Luxembourg
    801.7×
  195. 195DziałdowoWarmia-Masuria, Poland
    801.6×
  196. 195Mladá BoleslavCentral Bohemia, Czechia
    801.6×
  197. 195GjøvikInnlandet, Norway
    801.6×
  198. 195ToméBiobio, Chile
    801.6×
  199. 199HerrenbergBaden-Wurttemberg, Germany
    801.6×
  200. 199RengoO'Higgins Region, Chile
    801.6×

Top 200 of 2,130 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, January 20, 2024, smogrank.com/history/2024-01-20 (accessed 3 Oct 2026).

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