SmogRank / History / January 4, 2023

Most polluted cities on January 4, 2023

1,190 cities ranked by their average PM2.5 over the day; the worst was Lahore, Pakistan, at 452.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during January 4, 2023. All episodes.

← Lahore 452.0 µg/m³ 400 µg/m³15 WHO 24-hour guideline
Every city ranked for January 4, 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. 1Lahorelow-cost sensorsPunjab, Pakistan
    500+30.1×
  2. 2DelhiDelhi, India
    28914.3×
  3. 3PljevljaPljevlja, Montenegro
    28814.2×
  4. 4Dhakalow-cost sensorsDhaka Division, Bangladesh
    25011.7×
  5. 5BitolaBitola, North Macedonia
    23610.7×
  6. 6Islamabadlow-cost sensorsIslamabad, Pakistan
    1917.5×
  7. 7Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1897.3×
  8. 8MumbaiMaharashtra, India
    1816.6×
  9. 9HanoiHanoi, Vietnam
    1806.5×
  10. 10PodgoricaPodgorica, Montenegro
    1806.5×
  11. 11BaghdadBaghdad, Iraq
    1796.4×
  12. 12Banja LukaSrpska, Bosnia and Herzegovina
    1776.2×
  13. 13PristinaPristina, Kosovo
    1745.9×
  14. 14BamakoBamako, Mali
    1735.8×
  15. 15Botevgradlow-cost sensorsSofia, Bulgaria
    1715.6×
  16. 16Accralow-cost sensorsGreater Accra, Ghana
    1675.2×
  17. 17VolosThessaly, Greece
    1645.0×
  18. 18Kathmandulow-cost sensorsBagmati Province, Nepal
    1604.5×
  19. 19BadgerAlaska, United States
    1544.0×
  20. 20AlexandriaAlexandria, Egypt
    1523.8×
  21. 21Kampalalow-cost sensorsCentral Region, Uganda
    1523.8×
  22. 22NišCentral Serbia, Serbia
    1493.7×
  23. 23Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1483.6×
  24. 24HyderabadTelangana, India
    1453.5×
  25. 25AthensAttica, Greece
    1443.5×
  26. 26ThessaloníkiCentral Macedonia, Greece
    1353.3×
  27. 27Haskovolow-cost sensorsHaskovo, Bulgaria
    1233.0×
  28. 28KłodzkoLower Silesia, Poland
    1212.9×
  29. 29TocopillaAntofagasta, Chile
    1182.8×
  30. 30RatchaburiRatchaburi, Thailand
    1172.8×
  31. 31BeijingBeijing, China
    1132.7×
  32. 32Sevlievolow-cost sensorsGabrovo, Bulgaria
    1122.7×
  33. 32ColomboWestern Province, Sri Lanka
    1122.7×
  34. 34Hua HinPrachuap Khiri Khan, Thailand
    1112.6×
  35. 35GuangzhouGuangdong, China
    1102.6×
  36. 36BelgradeCentral Serbia, Serbia
    1082.5×
  37. 37NogalesSonora, Mexico
    1062.5×
  38. 38Tin Shui WaiYuen Long, Hong Kong
    1062.5×
  39. 39Cluj-NapocaCluj County, Romania
    1042.4×
  40. 40ShanghaiShanghai, China
    1032.4×
  41. 41LamphunLamphun, Thailand
    1022.4×
  42. 42XàtivaValencia, Spain
    1002.3×
  43. 43WolfsbergCarinthia, Austria
    992.3×
  44. 44RuseRuse, Bulgaria
    992.3×
  45. 45BohumínMoravian-Silesian Region, Czechia
    972.3×
  46. 46CraiovaDolj, Romania
    972.3×
  47. 47KrakówLesser Poland, Poland
    972.2×
  48. 48Nong KhaemBangkok, Thailand
    962.2×
  49. 49PátraWest Greece, Greece
    962.2×
  50. 50Mong KokYau Tsim Mong District, Hong Kong
    952.2×
  51. 51ChisinauChișinău Municipality, Moldova
    952.2×
  52. 51Bang NaBangkok, Thailand
    952.2×
  53. 53Ga-RankuwaNorth West, South Africa
    952.2×
  54. 54Tsuen WanTsuen Wan, Hong Kong
    942.2×
  55. 55Wan ChaiWan Chai, Hong Kong
    942.2×
  56. 56Gabrovolow-cost sensorsGabrovo, Bulgaria
    942.1×
  57. 57Khlong Sam WaBangkok, Thailand
    942.1×
  58. 58DushanbeDushanbe, Tajikistan
    932.1×
  59. 59ErmeloMpumalanga, South Africa
    932.1×
  60. 59Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    932.1×
  61. 61PiraeusAttica, Greece
    922.1×
  62. 61Kwai ChungKwai Tsing District, Hong Kong
    922.1×
  63. 63Mae SotTak, Thailand
    912.1×
  64. 64Tai PoTai Po, Hong Kong
    912.0×
  65. 65EtwatwaGauteng, South Africa
    912.0×
  66. 66Saphan SungBangkok, Thailand
    902.0×
  67. 67Tha YangPhetchaburi, Thailand
    902.0×
  68. 68LublinLublin, Poland
    892.0×
  69. 68LampangLampang, Thailand
    892.0×
  70. 70Dimitrovgradlow-cost sensorsHaskovo, Bulgaria
    892.0×
  71. 70VictoriaCentral and Western, Hong Kong
    892.0×
  72. 70DěčínÚstí nad Labem Region, Czechia
    892.0×
  73. 73Nakhon SawanNakhon Sawan, Thailand
    892.0×
  74. 73FanlingNorth District, Hong Kong
    892.0×
  75. 73Lat KrabangBangkok, Thailand
    892.0×
  76. 76NanNan, Thailand
    881.9×
  77. 77Samut SakhonSamut Sakhon, Thailand
    881.9×
  78. 78SukhothaiSukhothai, Thailand
    881.9×
  79. 78ŚwiecieKujawsko-Pomorskie, Poland
    881.9×
  80. 80BakuBaki, Azerbaijan
    871.9×
  81. 81Tha BoNong Khai, Thailand
    871.9×
  82. 81LimaLima Province, Peru
    871.9×
  83. 83BucharestBucharest, Romania
    871.9×
  84. 83Bang Khun ThianBangkok, Thailand
    871.9×
  85. 85PhichitPhichit, Thailand
    871.9×
  86. 85NogalesArizona, United States
    871.9×
  87. 87San Tung Chung HangIslands, Hong Kong
    871.9×
  88. 88Ban Samae DamBangkok, Thailand
    861.9×
  89. 89VanderbijlparkGauteng, South Africa
    861.9×
  90. 89KrapkowiceOpole Voivodeship, Poland
    861.9×
  91. 91KigaliKigali, Rwanda
    851.8×
  92. 92CelayaGuanajuato, Mexico
    851.8×
  93. 92Khan Na YaoBangkok, Thailand
    851.8×
  94. 94Bang KapiBangkok, Thailand
    851.8×
  95. 95Nakhon PathomNakhon Pathom, Thailand
    851.8×
  96. 96Hradec KrálovéHradec Králové Region, Czechia
    851.8×
  97. 97PhayaoPhayao, Thailand
    841.8×
  98. 97Suphan BuriSuphan Buri, Thailand
    841.8×
  99. 99Bueng KumBangkok, Thailand
    841.8×
  100. 100Falconara MarittimaThe Marches, Italy
    831.8×
  101. 101AcharnésAttica, Greece
    831.8×
  102. 102ValdemoroMadrid, Spain
    831.8×
  103. 102FairbanksAlaska, United States
    831.8×
  104. 104TorreviejaValencia, Spain
    831.7×
  105. 105StarachowiceŚwiętokrzyskie, Poland
    821.7×
  106. 105Sha TinSha Tin, Hong Kong
    821.7×
  107. 107SliemaTas-Sliema, Malta
    821.7×
  108. 107RacibórzSilesia, Poland
    821.7×
  109. 107TurinPiedmont, Italy
    821.7×
  110. 107HualpénBiobio, Chile
    821.7×
  111. 111TalaganteSantiago Metropolitan, Chile
    821.7×
  112. 112UttaraditUttaradit, Thailand
    821.7×
  113. 113JesiThe Marches, Italy
    821.7×
  114. 113Villa Poeta José Gálvez BarrenecheaLima region, Peru
    821.7×
  115. 115Sau Mau PingKwun Tong District, Hong Kong
    811.7×
  116. 116Naucalpan de JuárezMéxico, Mexico
    811.7×
  117. 117Lak SiBangkok, Thailand
    811.7×
  118. 118QuinteroValparaiso, Chile
    811.7×
  119. 119BangkokBangkok, Thailand
    801.7×
  120. 120VereenigingGauteng, South Africa
    801.6×
  121. 121Jastrzębie ZdrójSilesia, Poland
    801.6×
  122. 122Mueang NonthaburiNonthaburi, Thailand
    801.6×
  123. 122SantiagoSantiago Metropolitan, Chile
    801.6×
  124. 124Nong ChokBangkok, Thailand
    791.6×
  125. 124IrapuatoGuanajuato, Mexico
    791.6×
  126. 126ConcepciónBiobio, Chile
    791.6×
  127. 127SasolburgFree State, South Africa
    781.6×
  128. 127Ecatepec de MorelosMéxico, Mexico
    781.6×
  129. 129Ban Khlong PrawetBangkok, Thailand
    781.6×
  130. 130AsprópyrgosAttica, Greece
    781.6×
  131. 130Fort CollinsColorado, United States
    781.6×
  132. 132IaşiIași County, Romania
    781.6×
  133. 132Spišská Nová VesKošice Region, Slovakia
    781.6×
  134. 134MonacoMunicipality of Monaco, Monaco
    771.5×
  135. 135PhraePhrae, Thailand
    771.5×
  136. 135AlessandriaPiedmont, Italy
    771.5×
  137. 137Chiang MaiChiang Mai, Thailand
    771.5×
  138. 137ConcónValparaiso, Chile
    771.5×
  139. 139EsztergomKomárom-Esztergom, Hungary
    761.5×
  140. 140PhetchabunPhetchabun, Thailand
    761.5×
  141. 140Viña del MarValparaiso, Chile
    761.5×
  142. 142LoeiLoei, Thailand
    761.5×
  143. 142Bang Bo DistrictSamut Prakan, Thailand
    761.5×
  144. 142KatowiceSilesia, Poland
    761.5×
  145. 142AricaArica y Parinacota Region, Chile
    761.5×
  146. 146GrazStyria, Austria
    761.5×
  147. 147Jelenia GóraLower Silesia, Poland
    751.5×
  148. 147San Pedro de la PazBiobio, Chile
    751.5×
  149. 149WłocławekKujawsko-Pomorskie, Poland
    751.5×
  150. 150Ban ChangRayong, Thailand
    751.5×
  151. 151La SerenaCoquimbo Region, Chile
    751.5×
  152. 152BarBar, Montenegro
    741.4×
  153. 152Sai MaiBangkok, Thailand
    741.4×
  154. 154ToméBiobio, Chile
    741.4×
  155. 155TarnówLesser Poland, Poland
    741.4×
  156. 155Puente AltoSantiago Metropolitan, Chile
    741.4×
  157. 157Kędzierzyn-KoźleOpole Voivodeship, Poland
    741.4×
  158. 157AnconaThe Marches, Italy
    741.4×
  159. 159LyonAuvergne-Rhône-Alpes, France
    731.4×
  160. 159TrentoTrentino-Alto Adige, Italy
    731.4×
  161. 159PesaroThe Marches, Italy
    731.4×
  162. 162TalcahuanoBiobio, Chile
    731.4×
  163. 163Chiang RaiChiang Rai, Thailand
    731.4×
  164. 164Mae SaiChiang Rai, Thailand
    731.4×
  165. 164Klagenfurt am WörtherseeCarinthia, Austria
    731.4×
  166. 164ZvolenBanská Bystrica Region, Slovakia
    731.4×
  167. 167Kamphaeng PhetKamphaeng Phet, Thailand
    731.4×
  168. 167ŁaskŁódź Voivodeship, Poland
    731.4×
  169. 167NacimientoBiobio, Chile
    731.4×
  170. 167ChiguayanteBiobio, Chile
    731.4×
  171. 167CalamaAntofagasta, Chile
    731.4×
  172. 172PylaíaCentral Macedonia, Greece
    721.4×
  173. 172RužomberokŽilina Region, Slovakia
    721.4×
  174. 174AbasoloGuanajuato, Mexico
    721.4×
  175. 175KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    721.4×
  176. 175SaraburiSaraburi, Thailand
    721.4×
  177. 177RayongRayong, Thailand
    721.3×
  178. 177Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    721.3×
  179. 177Nakhon RatchasimaNakhon Ratchasima, Thailand
    721.3×
  180. 180CartagenaMurcia, Spain
    711.3×
  181. 180ToulouseOccitanie, France
    711.3×
  182. 180Mexico CityMexico City, Mexico
    711.3×
  183. 183Khlong LuangPathum Thani, Thailand
    711.3×
  184. 183EdmontonAlberta, Canada
    711.3×
  185. 185Si Maha PhotPrachin Buri, Thailand
    711.3×
  186. 186Lop BuriLopburi, Thailand
    711.3×
  187. 187ThembisaGauteng, South Africa
    711.3×
  188. 187CoquimboCoquimbo Region, Chile
    711.3×
  189. 189GyőrGyőr-Moson-Sopron, Hungary
    701.3×
  190. 189AntofagastaAntofagasta, Chile
    701.3×
  191. 189West FargoNorth Dakota, United States
    701.3×
  192. 192NiskoSubcarpathia, Poland
    701.3×
  193. 193SzegedCsongrád, Hungary
    701.3×
  194. 193OtwockMazovia, Poland
    701.3×
  195. 195KhartoumKhartoum, Sudan
    701.3×
  196. 195Mladá BoleslavCentral Bohemia, Czechia
    701.3×
  197. 197Phra PradaengSamut Prakan, Thailand
    691.3×
  198. 197Romans-sur-IsèreAuvergne-Rhône-Alpes, France
    691.3×
  199. 197BratislavaBratislava Region, Slovakia
    691.3×
  200. 197Collado-VillalbaMadrid, Spain
    691.3×

Top 200 of 1,190 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 4, 2023, smogrank.com/history/2023-01-04 (accessed 2 Oct 2026).

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