SmogRank / History / January 2, 2023

Most polluted cities on January 2, 2023

1,140 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 449.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during January 2, 2023. All episodes.

← N'Djamena 449.0 µg/m³ 400 µg/m³15 WHO 24-hour guideline
Every city ranked for January 2, 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. 1N'DjamenaN’Djaména, Chad
    500+29.9×
  2. 2Lahorelow-cost sensorsPunjab, Pakistan
    500+28.4×
  3. 3DelhiDelhi, India
    38817.9×
  4. 4PljevljaPljevlja, Montenegro
    35016.7×
  5. 5Dhakalow-cost sensorsDhaka Division, Bangladesh
    26912.9×
  6. 6Abujalow-cost sensorsFCT, Nigeria
    22910.3×
  7. 7Karachilow-cost sensorsSindh, Pakistan
    2068.7×
  8. 7Accralow-cost sensorsGreater Accra, Ghana
    2068.7×
  9. 9Islamabadlow-cost sensorsIslamabad, Pakistan
    1998.3×
  10. 10Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1957.9×
  11. 11PristinaPristina, Kosovo
    1917.5×
  12. 11Banja LukaSrpska, Bosnia and Herzegovina
    1917.5×
  13. 13DushanbeDushanbe, Tajikistan
    1867.0×
  14. 14MumbaiMaharashtra, India
    1786.3×
  15. 15NišCentral Serbia, Serbia
    1766.1×
  16. 16HanoiHanoi, Vietnam
    1756.0×
  17. 17CraiovaDolj, Romania
    1675.2×
  18. 18BelgradeCentral Serbia, Serbia
    1675.2×
  19. 19Kathmandulow-cost sensorsBagmati Province, Nepal
    1655.0×
  20. 20ChisinauChișinău Municipality, Moldova
    1624.7×
  21. 21AlexandriaAlexandria, Egypt
    1604.6×
  22. 22Botevgradlow-cost sensorsSofia, Bulgaria
    1604.5×
  23. 23BaghdadBaghdad, Iraq
    1594.4×
  24. 24HyderabadTelangana, India
    1544.0×
  25. 25ShanghaiShanghai, China
    1513.7×
  26. 26RužomberokŽilina Region, Slovakia
    1473.6×
  27. 27KrakówLesser Poland, Poland
    1463.6×
  28. 28BadgerAlaska, United States
    1443.5×
  29. 29Haskovolow-cost sensorsHaskovo, Bulgaria
    1443.5×
  30. 30BamakoBamako, Mali
    1413.4×
  31. 31KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    1373.4×
  32. 32Dimitrovgradlow-cost sensorsHaskovo, Bulgaria
    1323.2×
  33. 33ThessaloníkiCentral Macedonia, Greece
    1323.2×
  34. 34IaşiIași County, Romania
    1323.2×
  35. 35SalorTashkent Region, Uzbekistan
    1293.1×
  36. 36Tha BoNong Khai, Thailand
    1293.1×
  37. 37RuseRuse, Bulgaria
    1273.1×
  38. 38Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    1273.1×
  39. 39VolosThessaly, Greece
    1172.8×
  40. 40AthensAttica, Greece
    1172.8×
  41. 41Khlong Sam WaBangkok, Thailand
    1122.7×
  42. 42Ban Samae DamBangkok, Thailand
    1092.6×
  43. 43SofiaSofia-Capital, Bulgaria
    1082.6×
  44. 44KošiceKošice Region, Slovakia
    1082.5×
  45. 45Sevlievolow-cost sensorsGabrovo, Bulgaria
    1062.5×
  46. 46Kampalalow-cost sensorsCentral Region, Uganda
    1062.5×
  47. 47Cluj-NapocaCluj County, Romania
    1022.4×
  48. 48RatchaburiRatchaburi, Thailand
    1022.4×
  49. 48Nong KhaemBangkok, Thailand
    1022.4×
  50. 50Hua HinPrachuap Khiri Khan, Thailand
    1012.4×
  51. 51PátraWest Greece, Greece
    1012.4×
  52. 52BerounCentral Bohemia, Czechia
    1002.4×
  53. 53Bang Khun ThianBangkok, Thailand
    992.3×
  54. 54Khan Na YaoBangkok, Thailand
    992.3×
  55. 55ColomboWestern Province, Sri Lanka
    992.3×
  56. 56BakuBaki, Azerbaijan
    982.3×
  57. 57LamphunLamphun, Thailand
    982.3×
  58. 58Saphan SungBangkok, Thailand
    982.3×
  59. 59LoeiLoei, Thailand
    962.2×
  60. 60Bueng KumBangkok, Thailand
    962.2×
  61. 61Vranov nad TopľouPrešov Region, Slovakia
    952.2×
  62. 62Bang KapiBangkok, Thailand
    942.2×
  63. 63Lak SiBangkok, Thailand
    942.2×
  64. 64SukhothaiSukhothai, Thailand
    932.1×
  65. 65Frýdek-MístekMoravian-Silesian Region, Czechia
    932.1×
  66. 66Mueang NonthaburiNonthaburi, Thailand
    922.1×
  67. 67Bang NaBangkok, Thailand
    912.0×
  68. 68PhraePhrae, Thailand
    902.0×
  69. 68Wan ChaiWan Chai, Hong Kong
    902.0×
  70. 68Tin Shui WaiYuen Long, Hong Kong
    902.0×
  71. 71BangkokBangkok, Thailand
    902.0×
  72. 71ŽilinaŽilina Region, Slovakia
    902.0×
  73. 71EdinburgTexas, United States
    902.0×
  74. 74JeddahMecca Region, Saudi Arabia
    902.0×
  75. 74Khlong LuangPathum Thani, Thailand
    902.0×
  76. 76Sai MaiBangkok, Thailand
    902.0×
  77. 77Tai PoTai Po, Hong Kong
    892.0×
  78. 78MostÚstí nad Labem Region, Czechia
    892.0×
  79. 79Nakhon RatchasimaNakhon Ratchasima, Thailand
    892.0×
  80. 80BucharestBucharest, Romania
    881.9×
  81. 80PrešovPrešov Region, Slovakia
    881.9×
  82. 82NanNan, Thailand
    881.9×
  83. 83Buri RamBuriram, Thailand
    881.9×
  84. 84Santa Cruz de TenerifeCanary Islands, Spain
    881.9×
  85. 84Lat KrabangBangkok, Thailand
    881.9×
  86. 86Nakhon PathomNakhon Pathom, Thailand
    871.9×
  87. 87Si Maha PhotPrachin Buri, Thailand
    871.9×
  88. 87FanlingNorth District, Hong Kong
    871.9×
  89. 89Mong KokYau Tsim Mong District, Hong Kong
    871.9×
  90. 89Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    871.9×
  91. 91PhichitPhichit, Thailand
    861.9×
  92. 92San AntonioTexas, United States
    861.9×
  93. 93Nong ChokBangkok, Thailand
    861.8×
  94. 93LaredoTexas, United States
    861.8×
  95. 93West FargoNorth Dakota, United States
    861.8×
  96. 96Ban Khlong PrawetBangkok, Thailand
    851.8×
  97. 96Las Palmas de Gran CanariaCanary Islands, Spain
    851.8×
  98. 98Nong Bua LamphuNong Bua Lamphu, Thailand
    851.8×
  99. 99XàtivaValencia, Spain
    851.8×
  100. 100Samut SakhonSamut Sakhon, Thailand
    851.8×
  101. 100LinzUpper Austria, Austria
    851.8×
  102. 102LampangLampang, Thailand
    851.8×
  103. 102ŽideniceSouth Moravian, Czechia
    851.8×
  104. 104PiraeusAttica, Greece
    841.8×
  105. 104Nakhon SawanNakhon Sawan, Thailand
    841.8×
  106. 106Kwai ChungKwai Tsing District, Hong Kong
    841.8×
  107. 107Suphan BuriSuphan Buri, Thailand
    841.8×
  108. 108Udon ThaniUdon Thani, Thailand
    841.8×
  109. 109Ubon RatchathaniUbon Ratchathani, Thailand
    831.8×
  110. 110SzegedCsongrád, Hungary
    831.8×
  111. 110DearbornMichigan, United States
    831.8×
  112. 112Tha YangPhetchaburi, Thailand
    831.8×
  113. 112AranyaprathetSa Kaeo, Thailand
    831.8×
  114. 114Mae SotTak, Thailand
    831.7×
  115. 115KigaliKigali, Rwanda
    831.7×
  116. 115KalasinKalasin, Thailand
    831.7×
  117. 117UttaraditUttaradit, Thailand
    821.7×
  118. 117QuinteroValparaiso, Chile
    821.7×
  119. 119BergenVestland, Norway
    821.7×
  120. 120Chiang MaiChiang Mai, Thailand
    821.7×
  121. 120SaraburiSaraburi, Thailand
    821.7×
  122. 120Roi EtRoi Et, Thailand
    821.7×
  123. 120HavířovMoravian-Silesian Region, Czechia
    821.7×
  124. 120Bielsko-BialaSilesia, Poland
    821.7×
  125. 125AcharnésAttica, Greece
    821.7×
  126. 125Sakon NakhonSakon Nakhon, Thailand
    821.7×
  127. 125Tsuen WanTsuen Wan, Hong Kong
    821.7×
  128. 125LitvínovÚstí nad Labem Region, Czechia
    821.7×
  129. 129ZvolenBanská Bystrica Region, Slovakia
    821.7×
  130. 129MartinŽilina Region, Slovakia
    821.7×
  131. 129NacimientoBiobio, Chile
    821.7×
  132. 132HumennéPrešov Region, Slovakia
    811.7×
  133. 132Mae SaiChiang Rai, Thailand
    811.7×
  134. 132GuangzhouGuangdong, China
    811.7×
  135. 135Sha TinSha Tin, Hong Kong
    811.7×
  136. 136Kamphaeng PhetKamphaeng Phet, Thailand
    811.7×
  137. 136Ústí nad LabemÚstí nad Labem Region, Czechia
    811.7×
  138. 136OlomoucOlomouc Region, Czechia
    811.7×
  139. 139Lop BuriLopburi, Thailand
    811.7×
  140. 139BellinzonaTicino, Switzerland
    811.7×
  141. 139PilsenPlzeň Region, Czechia
    811.7×
  142. 142KadaňÚstí nad Labem Region, Czechia
    801.7×
  143. 143GrazStyria, Austria
    801.7×
  144. 144Ban ChangRayong, Thailand
    801.6×
  145. 144DěčínÚstí nad Labem Region, Czechia
    801.6×
  146. 146RedfordMichigan, United States
    801.6×
  147. 147LuganoTicino, Switzerland
    801.6×
  148. 148PhayaoPhayao, Thailand
    791.6×
  149. 149Grand RapidsMichigan, United States
    791.6×
  150. 150Jastrzębie ZdrójSilesia, Poland
    791.6×
  151. 150Saint PaulMinnesota, United States
    791.6×
  152. 152Si Sa KetSi Sa Ket, Thailand
    791.6×
  153. 152MukdahanMukdahan, Thailand
    791.6×
  154. 152Czechowice-DziedziceSilesia, Poland
    791.6×
  155. 155Phra PradaengSamut Prakan, Thailand
    781.6×
  156. 155EtwatwaGauteng, South Africa
    781.6×
  157. 157IngenioCanary Islands, Spain
    781.6×
  158. 158Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    781.6×
  159. 159FairbanksAlaska, United States
    781.6×
  160. 160OtwockMazovia, Poland
    771.6×
  161. 160eMbalenhleMpumalanga, South Africa
    771.6×
  162. 160Chiang RaiChiang Rai, Thailand
    771.6×
  163. 163TokozaGauteng, South Africa
    771.5×
  164. 163PhetchabunPhetchabun, Thailand
    771.5×
  165. 163Hat YaiSongkhla, Thailand
    771.5×
  166. 163La OrotavaCanary Islands, Spain
    771.5×
  167. 163KalamazooMichigan, United States
    771.5×
  168. 168Spišská Nová VesKošice Region, Slovakia
    771.5×
  169. 168RancaguaO'Higgins Region, Chile
    771.5×
  170. 168ConcónValparaiso, Chile
    771.5×
  171. 171Ga-RankuwaNorth West, South Africa
    771.5×
  172. 171Sau Mau PingKwun Tong District, Hong Kong
    771.5×
  173. 173AronaCanary Islands, Spain
    771.5×
  174. 173DerryNorthern Ireland, United Kingdom
    771.5×
  175. 175Almatylow-cost sensorsAlmaty, Kazakhstan
    771.5×
  176. 175San Tung Chung HangIslands, Hong Kong
    771.5×
  177. 177EsztergomKomárom-Esztergom, Hungary
    761.5×
  178. 177LancasterPennsylvania, United States
    761.5×
  179. 179ChaiyaphumChaiyaphum, Thailand
    761.5×
  180. 179QuillotaValparaiso, Chile
    761.5×
  181. 181LublinLublin, Poland
    761.5×
  182. 181TraunUpper Austria, Austria
    761.5×
  183. 183CuranilahueBiobio, Chile
    761.5×
  184. 184AugustówPodlasie, Poland
    751.5×
  185. 184Calumet CityIllinois, United States
    751.5×
  186. 186VereenigingGauteng, South Africa
    751.5×
  187. 187ChanthaburiChanthaburi, Thailand
    751.5×
  188. 187SantiagoSantiago Metropolitan, Chile
    751.5×
  189. 189AricaArica y Parinacota Region, Chile
    751.5×
  190. 190ArucasCanary Islands, Spain
    751.5×
  191. 190HualpénBiobio, Chile
    751.5×
  192. 190La CrosseWisconsin, United States
    751.5×
  193. 193AustinTexas, United States
    741.4×
  194. 194AshgabatAshgabat, Turkmenistan
    741.4×
  195. 195NiskoSubcarpathia, Poland
    741.4×
  196. 195JohannesburgGauteng, South Africa
    741.4×
  197. 195RayongRayong, Thailand
    741.4×
  198. 195IndianapolisIndiana, United States
    741.4×
  199. 199PakxanBolikhamsai, Laos
    741.4×
  200. 199La SerenaCoquimbo Region, Chile
    741.4×

Top 200 of 1,140 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 2, 2023, smogrank.com/history/2023-01-02 (accessed 2 Oct 2026).

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