SmogRank / History / January 9, 2023

Most polluted cities on January 9, 2023

1,186 cities ranked by their average PM2.5 over the day; the worst was Ceglie Messapica, Italy, at 666.0 µg/m³. Each city's own local calendar day.

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

← Ceglie Messapica 666.0 µg/m³ 600 µg/m³15 WHO 24-hour guideline
Every city ranked for January 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. 1Ceglie MessapicaApulia, Italy
    500+44.4×
  2. 2DelhiDelhi, India
    500+29.9×
  3. 3Lahorelow-cost sensorsPunjab, Pakistan
    42019.0×
  4. 4Dhakalow-cost sensorsDhaka Division, Bangladesh
    33016.0×
  5. 5HanoiHanoi, Vietnam
    1917.5×
  6. 6BaghdadBaghdad, Iraq
    1826.6×
  7. 7Islamabadlow-cost sensorsIslamabad, Pakistan
    1816.6×
  8. 8HyderabadTelangana, India
    1756.0×
  9. 9KigaliKigali, Rwanda
    1725.7×
  10. 10Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1645.0×
  11. 11Accralow-cost sensorsGreater Accra, Ghana
    1634.9×
  12. 12AlexandriaAlexandria, Egypt
    1624.8×
  13. 13ŚwiecieKujawsko-Pomorskie, Poland
    1604.6×
  14. 14VolosThessaly, Greece
    1594.5×
  15. 15N'DjamenaN’Djaména, Chad
    1574.3×
  16. 16ShanghaiShanghai, China
    1554.1×
  17. 17BitolaBitola, North Macedonia
    1513.7×
  18. 18EdmontonAlberta, Canada
    1483.6×
  19. 19Dimitrovgradlow-cost sensorsHaskovo, Bulgaria
    1473.6×
  20. 20Haskovolow-cost sensorsHaskovo, Bulgaria
    1453.5×
  21. 21Khlong Sam WaBangkok, Thailand
    1443.5×
  22. 22Sevlievolow-cost sensorsGabrovo, Bulgaria
    1423.5×
  23. 23Mueang NonthaburiNonthaburi, Thailand
    1403.4×
  24. 24MumbaiMaharashtra, India
    1383.4×
  25. 25Kathmandulow-cost sensorsBagmati Province, Nepal
    1383.4×
  26. 26RatchaburiRatchaburi, Thailand
    1353.3×
  27. 27Bang Khun ThianBangkok, Thailand
    1353.3×
  28. 28AthensAttica, Greece
    1353.3×
  29. 29Bang NaBangkok, Thailand
    1343.3×
  30. 30Nong KhaemBangkok, Thailand
    1343.2×
  31. 31Hua HinPrachuap Khiri Khan, Thailand
    1323.2×
  32. 32San JoséSan José, Costa Rica
    1313.2×
  33. 33Nong ChokBangkok, Thailand
    1313.2×
  34. 34SukhothaiSukhothai, Thailand
    1293.1×
  35. 35NišCentral Serbia, Serbia
    1283.1×
  36. 36Saphan SungBangkok, Thailand
    1283.1×
  37. 37Ban Samae DamBangkok, Thailand
    1273.1×
  38. 38Lak SiBangkok, Thailand
    1273.1×
  39. 39Lat KrabangBangkok, Thailand
    1263.1×
  40. 40Samut SakhonSamut Sakhon, Thailand
    1243.0×
  41. 40Khan Na YaoBangkok, Thailand
    1243.0×
  42. 42Bang KapiBangkok, Thailand
    1233.0×
  43. 43Abujalow-cost sensorsFCT, Nigeria
    1212.9×
  44. 44NanNan, Thailand
    1212.9×
  45. 44BangkokBangkok, Thailand
    1212.9×
  46. 46Bueng KumBangkok, Thailand
    1212.9×
  47. 47LamphunLamphun, Thailand
    1192.9×
  48. 48Suphan BuriSuphan Buri, Thailand
    1172.8×
  49. 49Sai MaiBangkok, Thailand
    1172.8×
  50. 50Ga-RankuwaNorth West, South Africa
    1162.8×
  51. 50Karachilow-cost sensorsSindh, Pakistan
    1162.8×
  52. 52PristinaPristina, Kosovo
    1152.7×
  53. 52Lop BuriLopburi, Thailand
    1152.7×
  54. 54Khlong LuangPathum Thani, Thailand
    1142.7×
  55. 55LęborkPomerania, Poland
    1142.7×
  56. 56Tha YangPhetchaburi, Thailand
    1132.7×
  57. 56PodgoricaPodgorica, Montenegro
    1132.7×
  58. 58Ban Khlong PrawetBangkok, Thailand
    1132.7×
  59. 59Mae SotTak, Thailand
    1122.7×
  60. 60Saint CloudMinnesota, United States
    1112.6×
  61. 61ColomboWestern Province, Sri Lanka
    1112.6×
  62. 62ToruńKujawsko-Pomorskie, Poland
    1102.6×
  63. 63St. AlbertAlberta, Canada
    1102.6×
  64. 64Nakhon PathomNakhon Pathom, Thailand
    1092.6×
  65. 65Sherwood ParkAlberta, Canada
    1082.6×
  66. 66YangonYangon, Myanmar
    1082.5×
  67. 67LampangLampang, Thailand
    1072.5×
  68. 68PhayaoPhayao, Thailand
    1072.5×
  69. 68GdyniaPomerania, Poland
    1072.5×
  70. 70PhraePhrae, Thailand
    1062.5×
  71. 71Udon ThaniUdon Thani, Thailand
    1062.5×
  72. 72BamakoBamako, Mali
    1052.5×
  73. 73ThessaloníkiCentral Macedonia, Greece
    1042.5×
  74. 74Bang Bo DistrictSamut Prakan, Thailand
    1042.4×
  75. 75WłocławekKujawsko-Pomorskie, Poland
    1032.4×
  76. 76Nong Bua LamphuNong Bua Lamphu, Thailand
    1022.4×
  77. 77UttaraditUttaradit, Thailand
    1022.4×
  78. 78Nakhon SawanNakhon Sawan, Thailand
    1012.4×
  79. 78LoeiLoei, Thailand
    1012.4×
  80. 80Nakhon RatchasimaNakhon Ratchasima, Thailand
    1012.4×
  81. 81Almatylow-cost sensorsAlmaty, Kazakhstan
    1002.4×
  82. 82SzamotułyGreater Poland, Poland
    992.3×
  83. 83Si Maha PhotPrachin Buri, Thailand
    982.3×
  84. 84Phra PradaengSamut Prakan, Thailand
    972.2×
  85. 85ShakopeeMinnesota, United States
    962.2×
  86. 86PljevljaPljevlja, Montenegro
    952.2×
  87. 87AcharnésAttica, Greece
    942.2×
  88. 87ChaiyaphumChaiyaphum, Thailand
    942.2×
  89. 89PhichitPhichit, Thailand
    942.2×
  90. 90PoznańGreater Poland, Poland
    942.1×
  91. 91Mae SaiChiang Rai, Thailand
    932.1×
  92. 91NacimientoBiobio, Chile
    932.1×
  93. 93Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    932.1×
  94. 94Chiang RaiChiang Rai, Thailand
    932.1×
  95. 94RayongRayong, Thailand
    932.1×
  96. 94Buri RamBuriram, Thailand
    932.1×
  97. 94GdańskPomerania, Poland
    932.1×
  98. 98StarachowiceŚwiętokrzyskie, Poland
    932.1×
  99. 98KrakówLesser Poland, Poland
    932.1×
  100. 100MinneapolisMinnesota, United States
    922.1×
  101. 101KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    922.1×
  102. 101AranyaprathetSa Kaeo, Thailand
    922.1×
  103. 101Saint PaulMinnesota, United States
    922.1×
  104. 104PhetchabunPhetchabun, Thailand
    922.1×
  105. 105Kamphaeng PhetKamphaeng Phet, Thailand
    922.1×
  106. 106Ban ChangRayong, Thailand
    912.0×
  107. 107Chiang MaiChiang Mai, Thailand
    912.0×
  108. 108SalorTashkent Region, Uzbekistan
    902.0×
  109. 109LublinLublin, Poland
    902.0×
  110. 110MukdahanMukdahan, Thailand
    892.0×
  111. 111TratTrat, Thailand
    892.0×
  112. 112KościerzynaPomerania, Poland
    892.0×
  113. 112KatowiceSilesia, Poland
    892.0×
  114. 114ChanthaburiChanthaburi, Thailand
    881.9×
  115. 115KutnoŁódź Voivodeship, Poland
    881.9×
  116. 115Villa Poeta José Gálvez BarrenecheaLima region, Peru
    881.9×
  117. 117SuperiorWisconsin, United States
    881.9×
  118. 118Apple ValleyMinnesota, United States
    881.9×
  119. 119Eau ClaireWisconsin, United States
    871.9×
  120. 120CalexicoCalifornia, United States
    871.9×
  121. 121PakxanBolikhamsai, Laos
    871.9×
  122. 122BydgoszczKujawsko-Pomorskie, Poland
    871.9×
  123. 122LimaLima Province, Peru
    871.9×
  124. 124ŻyrardówMazovia, Poland
    861.9×
  125. 125Ban HouakhouaBokeo, Laos
    851.8×
  126. 126VanderbijlparkGauteng, South Africa
    851.8×
  127. 127Wan ChaiWan Chai, Hong Kong
    851.8×
  128. 128Gorzów WielkopolskiLubusz, Poland
    851.8×
  129. 129CelayaGuanajuato, Mexico
    841.8×
  130. 130PłockMazovia, Poland
    841.8×
  131. 130NogalesArizona, United States
    841.8×
  132. 132AsprópyrgosAttica, Greece
    831.8×
  133. 133Sakon NakhonSakon Nakhon, Thailand
    831.8×
  134. 134SaraburiSaraburi, Thailand
    831.7×
  135. 135Tin Shui WaiYuen Long, Hong Kong
    821.7×
  136. 135NogalesSonora, Mexico
    821.7×
  137. 137JohannesburgGauteng, South Africa
    821.7×
  138. 137FanlingNorth District, Hong Kong
    821.7×
  139. 137KłodzkoLower Silesia, Poland
    821.7×
  140. 137PhoenixArizona, United States
    821.7×
  141. 141OtwockMazovia, Poland
    821.7×
  142. 141DushanbeDushanbe, Tajikistan
    821.7×
  143. 141Mong KokYau Tsim Mong District, Hong Kong
    821.7×
  144. 141Ústí nad LabemÚstí nad Labem Region, Czechia
    821.7×
  145. 145Tsuen WanTsuen Wan, Hong Kong
    821.7×
  146. 145VictoriaCentral and Western, Hong Kong
    821.7×
  147. 145WolfsbergCarinthia, Austria
    821.7×
  148. 145UstkaPomerania, Poland
    821.7×
  149. 149Şabāḩ as SālimMubārak al Kabīr, Kuwait
    811.7×
  150. 149Jastrzębie ZdrójSilesia, Poland
    811.7×
  151. 151Tai PoTai Po, Hong Kong
    811.7×
  152. 152LitvínovÚstí nad Labem Region, Czechia
    801.7×
  153. 153Ubon RatchathaniUbon Ratchathani, Thailand
    801.6×
  154. 154AricaArica y Parinacota Region, Chile
    801.6×
  155. 155Kwai ChungKwai Tsing District, Hong Kong
    801.6×
  156. 155ZgierzŁódź Voivodeship, Poland
    801.6×
  157. 155AppletonWisconsin, United States
    801.6×
  158. 158ŁaskŁódź Voivodeship, Poland
    791.6×
  159. 159ClintonIowa, United States
    791.6×
  160. 160SarpsborgØstfold, Norway
    791.6×
  161. 161KalasinKalasin, Thailand
    791.6×
  162. 162PiraeusAttica, Greece
    781.6×
  163. 162CraiovaDolj, Romania
    781.6×
  164. 164Roi EtRoi Et, Thailand
    781.6×
  165. 165BelgradeCentral Serbia, Serbia
    781.6×
  166. 165ZvolenBanská Bystrica Region, Slovakia
    781.6×
  167. 165Green BayWisconsin, United States
    781.6×
  168. 168NiskoSubcarpathia, Poland
    781.6×
  169. 169OlsztynWarmia-Masuria, Poland
    771.6×
  170. 170Ciudad JuárezChihuahua, Mexico
    771.5×
  171. 171RadomMazovia, Poland
    771.5×
  172. 171La CrosseWisconsin, United States
    771.5×
  173. 173WarsawMazovia, Poland
    771.5×
  174. 173RacibórzSilesia, Poland
    771.5×
  175. 175TijuanaBaja California, Mexico
    771.5×
  176. 176Botevgradlow-cost sensorsSofia, Bulgaria
    761.5×
  177. 176ThembisaGauteng, South Africa
    761.5×
  178. 178WawerMazovia, Poland
    761.5×
  179. 178RochesterMinnesota, United States
    761.5×
  180. 180PrešovPrešov Region, Slovakia
    751.5×
  181. 180MarikanaNorth West, South Africa
    751.5×
  182. 182DěčínÚstí nad Labem Region, Czechia
    751.5×
  183. 183Puente AltoSantiago Metropolitan, Chile
    751.5×
  184. 184PruszkówMazovia, Poland
    751.5×
  185. 184PhuketPhuket, Thailand
    751.5×
  186. 186VentspilsVentspils, Latvia
    741.4×
  187. 186León de los AldamaGuanajuato, Mexico
    741.4×
  188. 186Granite CityIllinois, United States
    741.4×
  189. 189BohumínMoravian-Silesian Region, Czechia
    741.4×
  190. 190Si Sa KetSi Sa Ket, Thailand
    741.4×
  191. 190IrapuatoGuanajuato, Mexico
    741.4×
  192. 192KętrzynWarmia-Masuria, Poland
    741.4×
  193. 192MadisonWisconsin, United States
    741.4×
  194. 194Hradec KrálovéHradec Králové Region, Czechia
    731.4×
  195. 195KošiceKošice Region, Slovakia
    731.4×
  196. 195WrocławLower Silesia, Poland
    731.4×
  197. 197SasolburgFree State, South Africa
    731.4×
  198. 197Banská BystricaBanská Bystrica Region, Slovakia
    731.4×
  199. 199PátraWest Greece, Greece
    731.4×
  200. 199WaukeshaWisconsin, United States
    731.4×

Top 200 of 1,186 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

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SmogRank, most polluted cities, PM2.5, January 9, 2023, smogrank.com/history/2023-01-09 (accessed 2 Oct 2026).

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