SmogRank / History / January 3, 2023

Most polluted cities on January 3, 2023

1,001 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 412.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during January 3, 2023. All episodes.

← N'Djamena 412.0 µg/m³ 400 µg/m³15 WHO 24-hour guideline
Every city ranked for January 3, 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+27.5×
  2. 2Lahorelow-cost sensorsPunjab, Pakistan
    41218.7×
  3. 2DelhiDelhi, India
    41218.7×
  4. 4Abujalow-cost sensorsFCT, Nigeria
    40818.6×
  5. 5Dhakalow-cost sensorsDhaka Division, Bangladesh
    29214.5×
  6. 6DushanbeDushanbe, Tajikistan
    25411.9×
  7. 7Accralow-cost sensorsGreater Accra, Ghana
    2139.2×
  8. 8PristinaPristina, Kosovo
    1957.9×
  9. 9Islamabadlow-cost sensorsIslamabad, Pakistan
    1887.2×
  10. 10Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1816.6×
  11. 11MumbaiMaharashtra, India
    1806.5×
  12. 12Banja LukaSrpska, Bosnia and Herzegovina
    1725.7×
  13. 13BaghdadBaghdad, Iraq
    1715.6×
  14. 14Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1685.3×
  15. 15BamakoBamako, Mali
    1665.1×
  16. 16Kathmandulow-cost sensorsBagmati Province, Nepal
    1604.6×
  17. 17HanoiHanoi, Vietnam
    1594.4×
  18. 18BadgerAlaska, United States
    1584.4×
  19. 19Karachilow-cost sensorsSindh, Pakistan
    1564.2×
  20. 20Kampalalow-cost sensorsCentral Region, Uganda
    1564.2×
  21. 21AlexandriaAlexandria, Egypt
    1564.1×
  22. 22HyderabadTelangana, India
    1554.1×
  23. 23Botevgradlow-cost sensorsSofia, Bulgaria
    1554.1×
  24. 24VolosThessaly, Greece
    1554.0×
  25. 25ThessaloníkiCentral Macedonia, Greece
    1523.8×
  26. 26AthensAttica, Greece
    1493.7×
  27. 27ChisinauChișinău Municipality, Moldova
    1393.4×
  28. 28SalorTashkent Region, Uzbekistan
    1202.9×
  29. 29KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    1182.8×
  30. 30Dimitrovgradlow-cost sensorsHaskovo, Bulgaria
    1152.8×
  31. 31Haskovolow-cost sensorsHaskovo, Bulgaria
    1102.6×
  32. 32ParedesPorto, Portugal
    1082.6×
  33. 33Sevlievolow-cost sensorsGabrovo, Bulgaria
    1062.5×
  34. 34SofiaSofia-Capital, Bulgaria
    1052.5×
  35. 35TurinPiedmont, Italy
    1032.4×
  36. 36LimaLima Province, Peru
    1032.4×
  37. 37AcharnésAttica, Greece
    1032.4×
  38. 38WolfsbergCarinthia, Austria
    1022.4×
  39. 38Villa Poeta José Gálvez BarrenecheaLima region, Peru
    1022.4×
  40. 40Bang Khun ThianBangkok, Thailand
    1022.4×
  41. 41Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    1012.4×
  42. 42Wan ChaiWan Chai, Hong Kong
    1002.4×
  43. 43ColomboWestern Province, Sri Lanka
    1002.4×
  44. 44FairbanksAlaska, United States
    992.3×
  45. 45West FargoNorth Dakota, United States
    992.3×
  46. 46GuangzhouGuangdong, China
    982.3×
  47. 47Nong KhaemBangkok, Thailand
    972.3×
  48. 48Mong KokYau Tsim Mong District, Hong Kong
    962.2×
  49. 49Tin Shui WaiYuen Long, Hong Kong
    962.2×
  50. 50JesiThe Marches, Italy
    942.2×
  51. 51Samut SakhonSamut Sakhon, Thailand
    942.1×
  52. 52RuseRuse, Bulgaria
    932.1×
  53. 52Tai PoTai Po, Hong Kong
    932.1×
  54. 54PiraeusAttica, Greece
    932.1×
  55. 55Almatylow-cost sensorsAlmaty, Kazakhstan
    922.1×
  56. 56VictoriaCentral and Western, Hong Kong
    922.1×
  57. 57FanlingNorth District, Hong Kong
    912.0×
  58. 58BangkokBangkok, Thailand
    912.0×
  59. 59XàtivaValencia, Spain
    902.0×
  60. 60Kwai ChungKwai Tsing District, Hong Kong
    892.0×
  61. 61Mueang NonthaburiNonthaburi, Thailand
    892.0×
  62. 62Nakhon PathomNakhon Pathom, Thailand
    881.9×
  63. 63Tsuen WanTsuen Wan, Hong Kong
    871.9×
  64. 64KhartoumKhartoum, Sudan
    871.9×
  65. 65Sha TinSha Tin, Hong Kong
    861.9×
  66. 66Sau Mau PingKwun Tong District, Hong Kong
    861.9×
  67. 67BrownsvilleTexas, United States
    861.9×
  68. 68ConcónValparaiso, Chile
    851.8×
  69. 69Klagenfurt am WörtherseeCarinthia, Austria
    851.8×
  70. 70EsztergomKomárom-Esztergom, Hungary
    851.8×
  71. 71JeddahMecca Region, Saudi Arabia
    831.8×
  72. 71Valašské MeziříčíZlín, Czechia
    831.8×
  73. 73ValenciaValencia, Spain
    831.7×
  74. 73HavířovMoravian-Silesian Region, Czechia
    831.7×
  75. 75TocopillaAntofagasta, Chile
    821.7×
  76. 76PátraWest Greece, Greece
    821.7×
  77. 76Khlong LuangPathum Thani, Thailand
    821.7×
  78. 78San Tung Chung HangIslands, Hong Kong
    821.7×
  79. 79TorreviejaValencia, Spain
    821.7×
  80. 79HarrisburgPennsylvania, United States
    821.7×
  81. 81AlessandriaPiedmont, Italy
    811.7×
  82. 82Bang KapiBangkok, Thailand
    811.7×
  83. 82SallanchesAuvergne-Rhône-Alpes, France
    811.7×
  84. 82Frýdek-MístekMoravian-Silesian Region, Czechia
    811.7×
  85. 85EdinburgTexas, United States
    801.7×
  86. 86QuinteroValparaiso, Chile
    801.7×
  87. 87Phra PradaengSamut Prakan, Thailand
    801.6×
  88. 87Santa Anita - Los FicusLima region, Peru
    801.6×
  89. 89PylaíaCentral Macedonia, Greece
    791.6×
  90. 89L'Ancienne-LoretteQuebec, Canada
    791.6×
  91. 91Sham Shui PoSham Shui Po District, Hong Kong
    791.6×
  92. 92Bang Bo DistrictSamut Prakan, Thailand
    791.6×
  93. 92NacimientoBiobio, Chile
    791.6×
  94. 94EdmontonAlberta, Canada
    781.6×
  95. 95AricaArica y Parinacota Region, Chile
    761.5×
  96. 96ValdemoroMadrid, Spain
    751.5×
  97. 96CarlislePennsylvania, United States
    751.5×
  98. 98Falconara MarittimaThe Marches, Italy
    751.5×
  99. 99CelayaGuanajuato, Mexico
    751.5×
  100. 100Gabrovolow-cost sensorsGabrovo, Bulgaria
    751.5×
  101. 101HualpénBiobio, Chile
    741.4×
  102. 102DěčínÚstí nad Labem Region, Czechia
    741.4×
  103. 103BohumínMoravian-Silesian Region, Czechia
    741.4×
  104. 104GranadaAndalusia, Spain
    741.4×
  105. 104LinzUpper Austria, Austria
    741.4×
  106. 106QuillotaValparaiso, Chile
    741.4×
  107. 106LebanonPennsylvania, United States
    741.4×
  108. 108Mladá BoleslavCentral Bohemia, Czechia
    731.4×
  109. 109SantiagoSantiago Metropolitan, Chile
    731.4×
  110. 109RancaguaO'Higgins Region, Chile
    731.4×
  111. 109NogalesSonora, Mexico
    731.4×
  112. 112BakuBaki, Azerbaijan
    731.4×
  113. 112Viña del MarValparaiso, Chile
    731.4×
  114. 114CartagenaMurcia, Spain
    731.4×
  115. 114CoquimboCoquimbo Region, Chile
    731.4×
  116. 116TraunUpper Austria, Austria
    721.4×
  117. 116TalaganteSantiago Metropolitan, Chile
    721.4×
  118. 118GrazStyria, Austria
    721.4×
  119. 118ZlínZlín, Czechia
    721.4×
  120. 118CalamaAntofagasta, Chile
    721.4×
  121. 121SzegedCsongrád, Hungary
    721.4×
  122. 121Hradec KrálovéHradec Králové Region, Czechia
    721.4×
  123. 121ButteMontana, United States
    721.4×
  124. 124KigaliKigali, Rwanda
    711.3×
  125. 124MonacoMunicipality of Monaco, Monaco
    711.3×
  126. 124AntofagastaAntofagasta, Chile
    711.3×
  127. 127Tha BoNong Khai, Thailand
    711.3×
  128. 127LancasterPennsylvania, United States
    711.3×
  129. 129La SerenaCoquimbo Region, Chile
    711.3×
  130. 129CuricóMaule Region, Chile
    711.3×
  131. 129ReadingPennsylvania, United States
    711.3×
  132. 132AntananarivoAnalamanga, Madagascar
    711.3×
  133. 133Český TěšínMoravian-Silesian Region, Czechia
    701.3×
  134. 134LuganoTicino, Switzerland
    701.3×
  135. 134ConcepciónBiobio, Chile
    701.3×
  136. 134Port HuronMichigan, United States
    701.3×
  137. 137ManosqueProvence-Alpes-Côte d'Azur, France
    701.3×
  138. 138AsprópyrgosAttica, Greece
    701.3×
  139. 139EllensburgWashington, United States
    691.3×
  140. 140OstravaMoravian-Silesian Region, Czechia
    691.3×
  141. 141Puente AltoSantiago Metropolitan, Chile
    691.2×
  142. 141CopiapóAtacama, Chile
    691.2×
  143. 143ToméBiobio, Chile
    691.2×
  144. 144Fort LeeNew Jersey, United States
    681.2×
  145. 145GyőrGyőr-Moson-Sopron, Hungary
    681.2×
  146. 145BerounCentral Bohemia, Czechia
    681.2×
  147. 145AnconaThe Marches, Italy
    681.2×
  148. 145YorkPennsylvania, United States
    681.2×
  149. 149AlgiersAlgiers, Algeria
    681.2×
  150. 149CallaoCallao, Peru
    681.2×
  151. 151Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    681.2×
  152. 151MarseilleProvence-Alpes-Côte d'Azur, France
    681.2×
  153. 153Santa Cruz de TenerifeCanary Islands, Spain
    681.2×
  154. 154ElizabethNew Jersey, United States
    671.2×
  155. 154QuébecQuebec, Canada
    671.2×
  156. 156Spanish SpringsNevada, United States
    671.2×
  157. 156San Pedro de la PazBiobio, Chile
    671.2×
  158. 158AlbertvilleAuvergne-Rhône-Alpes, France
    671.2×
  159. 158BethlehemPennsylvania, United States
    671.2×
  160. 160HualquiBiobio, Chile
    671.2×
  161. 160Jersey CityNew Jersey, United States
    671.2×
  162. 160ShawiniganQuebec, Canada
    671.2×
  163. 163La SpeziaLiguria, Italy
    661.2×
  164. 163NogalesArizona, United States
    661.2×
  165. 165New York CityNew York, United States
    661.2×
  166. 165BridgeportConnecticut, United States
    661.2×
  167. 167Clermont-FerrandAuvergne-Rhône-Alpes, France
    661.1×
  168. 167TalcaMaule Region, Chile
    661.1×
  169. 169DaxNew Aquitaine, France
    661.1×
  170. 170Port AlberniBritish Columbia, Canada
    661.1×
  171. 171BellinzonaTicino, Switzerland
    661.1×
  172. 171CoronelBiobio, Chile
    661.1×
  173. 171AlbanyNew York, United States
    661.1×
  174. 174ArucasCanary Islands, Spain
    651.1×
  175. 174TalcahuanoBiobio, Chile
    651.1×
  176. 174Puerto VarasLos Lagos Region, Chile
    651.1×
  177. 174Puerto MonttLos Lagos Region, Chile
    651.1×
  178. 178OviedoAsturias, Spain
    651.1×
  179. 178PennsaukenNew Jersey, United States
    651.1×
  180. 178New HavenConnecticut, United States
    651.1×
  181. 181AmstettenLower Austria, Austria
    651.1×
  182. 181MeylanAuvergne-Rhône-Alpes, France
    651.1×
  183. 181BrocktonMassachusetts, United States
    651.1×
  184. 181Bay CityMichigan, United States
    651.1×
  185. 181ProvidenceRhode Island, United States
    651.1×
  186. 181YakimaWashington, United States
    651.1×
  187. 181KitchenerOntario, Canada
    651.1×
  188. 188CauquenesMaule Region, Chile
    641.1×
  189. 188RoseburgOregon, United States
    641.1×
  190. 190LeedsEngland, United Kingdom
    641.1×
  191. 191ChiguayanteBiobio, Chile
    641.1×
  192. 191LindenNew Jersey, United States
    641.1×
  193. 191RutlandVermont, United States
    641.1×
  194. 194DunaújvárosFejér, Hungary
    631.1×
  195. 194PittsfieldMassachusetts, United States
    631.1×
  196. 194Sherwood ParkAlberta, Canada
    631.1×
  197. 197GreenfieldMassachusetts, United States
    631.0×
  198. 197AllentownPennsylvania, United States
    631.0×
  199. 199SaguntoValencia, Spain
    631.0×
  200. 199Las Palmas de Gran CanariaCanary Islands, Spain
    631.0×

Top 200 of 1,001 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 3, 2023, smogrank.com/history/2023-01-03 (accessed 2 Oct 2026).

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