SmogRank / History / January 18, 2023

Most polluted cities on January 18, 2023

1,218 cities ranked by their average PM2.5 over the day; the worst was Gómez Palacio, Mexico, at 503.2 µg/m³. Each city's own local calendar day.

Bad-air episodes during January 18, 2023. All episodes.

← Gómez Palacio 503.2 µg/m³ 500 µg/m³15 WHO 24-hour guideline
Every city ranked for January 18, 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. 1Gómez PalacioDurango, Mexico
    500+33.5×
  2. 2Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    49321.5×
  3. 3Lahorelow-cost sensorsPunjab, Pakistan
    29314.5×
  4. 4Dhakalow-cost sensorsDhaka Division, Bangladesh
    28614.1×
  5. 5Karachilow-cost sensorsSindh, Pakistan
    26112.4×
  6. 6DelhiDelhi, India
    25011.7×
  7. 7MumbaiMaharashtra, India
    24911.6×
  8. 8Almatylow-cost sensorsAlmaty, Kazakhstan
    24411.3×
  9. 9SalorTashkent Region, Uzbekistan
    2109.0×
  10. 10Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1927.6×
  11. 11AshgabatAshgabat, Turkmenistan
    1776.2×
  12. 12Islamabadlow-cost sensorsIslamabad, Pakistan
    1776.2×
  13. 13Addis AbabaAddis Ababa, Ethiopia
    1685.3×
  14. 14KigaliKigali, Rwanda
    1675.2×
  15. 15DushanbeDushanbe, Tajikistan
    1665.1×
  16. 16Kathmandulow-cost sensorsBagmati Province, Nepal
    1634.8×
  17. 17N'DjamenaN’Djaména, Chad
    1614.7×
  18. 18SliemaTas-Sliema, Malta
    1614.6×
  19. 19Ceglie MessapicaApulia, Italy
    1604.6×
  20. 20YangonYangon, Myanmar
    1574.2×
  21. 21AlexandriaAlexandria, Egypt
    1554.1×
  22. 22HanoiHanoi, Vietnam
    1533.9×
  23. 23LęborkPomerania, Poland
    1523.8×
  24. 24TlaquepaqueJalisco, Mexico
    1483.6×
  25. 25Nong KhaemBangkok, Thailand
    1473.6×
  26. 26San Francisco TlalcilalcalpanMéxico, Mexico
    1443.5×
  27. 27Accralow-cost sensorsGreater Accra, Ghana
    1423.5×
  28. 28Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1393.4×
  29. 29RatchaburiRatchaburi, Thailand
    1393.4×
  30. 30ShanghaiShanghai, China
    1373.4×
  31. 31CholulaPuebla, Mexico
    1363.3×
  32. 32CelayaGuanajuato, Mexico
    1343.2×
  33. 33BamakoBamako, Mali
    1333.2×
  34. 34LamphunLamphun, Thailand
    1333.2×
  35. 35San Mateo AtencoMéxico, Mexico
    1323.2×
  36. 36MostaIl-Mosta, Malta
    1313.2×
  37. 37TolucaMéxico, Mexico
    1263.0×
  38. 38SzamotułyGreater Poland, Poland
    1253.0×
  39. 39Mae SaiChiang Rai, Thailand
    1243.0×
  40. 40Mae SotTak, Thailand
    1243.0×
  41. 40Bang Khun ThianBangkok, Thailand
    1243.0×
  42. 42Nakhon PathomNakhon Pathom, Thailand
    1233.0×
  43. 42Hacienda Santa FeJalisco, Mexico
    1233.0×
  44. 44HyderabadTelangana, India
    1233.0×
  45. 44Khlong LuangPathum Thani, Thailand
    1233.0×
  46. 46Jelenia GóraLower Silesia, Poland
    1212.9×
  47. 47NanNan, Thailand
    1202.9×
  48. 48Bang NaBangkok, Thailand
    1192.9×
  49. 49PhayaoPhayao, Thailand
    1192.9×
  50. 49Chiang RaiChiang Rai, Thailand
    1192.9×
  51. 51LampangLampang, Thailand
    1192.8×
  52. 52BadgerAlaska, United States
    1182.8×
  53. 53Ban Samae DamBangkok, Thailand
    1182.8×
  54. 54Kampalalow-cost sensorsCentral Region, Uganda
    1172.8×
  55. 55Bueng KumBangkok, Thailand
    1162.8×
  56. 56Ciudad Benito JuárezNuevo León, Mexico
    1132.7×
  57. 57Chiang MaiChiang Mai, Thailand
    1122.7×
  58. 58Kamphaeng PhetKamphaeng Phet, Thailand
    1122.7×
  59. 59KrapkowiceOpole Voivodeship, Poland
    1112.6×
  60. 60UttaraditUttaradit, Thailand
    1102.6×
  61. 61Villa Poeta José Gálvez BarrenecheaLima region, Peru
    1092.6×
  62. 62GuadalajaraJalisco, Mexico
    1092.6×
  63. 63PueblaPuebla, Mexico
    1082.6×
  64. 64Lat KrabangBangkok, Thailand
    1072.5×
  65. 65Bang KapiBangkok, Thailand
    1072.5×
  66. 66RacibórzSilesia, Poland
    1062.5×
  67. 66Naucalpan de JuárezMéxico, Mexico
    1062.5×
  68. 66Saphan SungBangkok, Thailand
    1062.5×
  69. 69PhichitPhichit, Thailand
    1062.5×
  70. 70BangkokBangkok, Thailand
    1042.4×
  71. 71ColomboWestern Province, Sri Lanka
    1032.4×
  72. 72Khan Na YaoBangkok, Thailand
    1022.4×
  73. 73TlaxcalaTlaxcala, Mexico
    1012.4×
  74. 74Samut SakhonSamut Sakhon, Thailand
    1012.4×
  75. 75BakuBaki, Azerbaijan
    1002.4×
  76. 75Suphan BuriSuphan Buri, Thailand
    1002.4×
  77. 77MexicaliBaja California, Mexico
    1002.3×
  78. 78XonacatlánMéxico, Mexico
    992.3×
  79. 79Lak SiBangkok, Thailand
    992.3×
  80. 80Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    982.3×
  81. 81ToruńKujawsko-Pomorskie, Poland
    982.3×
  82. 82Ban Khlong PrawetBangkok, Thailand
    972.3×
  83. 82Sai MaiBangkok, Thailand
    972.3×
  84. 84RayongRayong, Thailand
    972.3×
  85. 85TakTak, Thailand
    962.2×
  86. 85Bang Bo DistrictSamut Prakan, Thailand
    962.2×
  87. 87KłodzkoLower Silesia, Poland
    962.2×
  88. 88Ciudad ApodacaNuevo León, Mexico
    952.2×
  89. 89BaghdadBaghdad, Iraq
    952.2×
  90. 89WrocławLower Silesia, Poland
    952.2×
  91. 89WłocławekKujawsko-Pomorskie, Poland
    952.2×
  92. 92MiędzyrzeczLubusz, Poland
    952.2×
  93. 93San Salvador TizatlalliMéxico, Mexico
    942.1×
  94. 94Ecatepec de MorelosMéxico, Mexico
    942.1×
  95. 95Si Maha PhotPrachin Buri, Thailand
    932.1×
  96. 96Nakhon SawanNakhon Sawan, Thailand
    922.1×
  97. 96LimaLima Province, Peru
    922.1×
  98. 98AranyaprathetSa Kaeo, Thailand
    922.1×
  99. 99VanderbijlparkGauteng, South Africa
    922.1×
  100. 100KutnoŁódź Voivodeship, Poland
    922.1×
  101. 101Mueang NonthaburiNonthaburi, Thailand
    922.1×
  102. 102Santiago de QuerétaroQuerétaro, Mexico
    912.0×
  103. 103Cadereyta JiménezNuevo León, Mexico
    912.0×
  104. 104PoznańGreater Poland, Poland
    912.0×
  105. 105Ban Talat BuengChon Buri, Thailand
    912.0×
  106. 105ZgierzŁódź Voivodeship, Poland
    912.0×
  107. 107Nong ChokBangkok, Thailand
    902.0×
  108. 107Zacatepec de HidalgoMorelos, Mexico
    902.0×
  109. 109ŁaskŁódź Voivodeship, Poland
    902.0×
  110. 110Ciudad NezahualcoyotlMéxico, Mexico
    892.0×
  111. 111Phra PradaengSamut Prakan, Thailand
    892.0×
  112. 111DěčínÚstí nad Labem Region, Czechia
    892.0×
  113. 111PłockMazovia, Poland
    892.0×
  114. 114AlessandriaPiedmont, Italy
    892.0×
  115. 115Jastrzębie ZdrójSilesia, Poland
    881.9×
  116. 116Kędzierzyn-KoźleOpole Voivodeship, Poland
    881.9×
  117. 117Lop BuriLopburi, Thailand
    881.9×
  118. 118Zielona GóraLubusz, Poland
    871.9×
  119. 119PhetchabunPhetchabun, Thailand
    871.9×
  120. 119Santa CatarinaNuevo León, Mexico
    871.9×
  121. 121SaraburiSaraburi, Thailand
    871.9×
  122. 122SantiagoSantiago Metropolitan, Chile
    851.8×
  123. 123PristinaPristina, Kosovo
    851.8×
  124. 123Puente AltoSantiago Metropolitan, Chile
    851.8×
  125. 125SzczecinWest Pomerania, Poland
    851.8×
  126. 126GdyniaPomerania, Poland
    841.8×
  127. 126MonterreyNuevo León, Mexico
    841.8×
  128. 128PylaíaCentral Macedonia, Greece
    841.8×
  129. 128ZapopanJalisco, Mexico
    841.8×
  130. 130Tha YangPhetchaburi, Thailand
    841.8×
  131. 131OpoleOpole Voivodeship, Poland
    831.7×
  132. 131Pachuca de SotoHidalgo, Mexico
    831.7×
  133. 133GuangzhouGuangdong, China
    821.7×
  134. 134LublinLublin, Poland
    821.7×
  135. 135TurinPiedmont, Italy
    811.7×
  136. 135HualpénBiobio, Chile
    811.7×
  137. 137Grande PrairieAlberta, Canada
    811.7×
  138. 138BerounCentral Bohemia, Czechia
    811.7×
  139. 138NacimientoBiobio, Chile
    811.7×
  140. 140RancaguaO'Higgins Region, Chile
    811.7×
  141. 141KanchanaburiKanchanaburi, Thailand
    801.7×
  142. 141Hua HinPrachuap Khiri Khan, Thailand
    801.7×
  143. 143ŻyrardówMazovia, Poland
    801.6×
  144. 143BeijingBeijing, China
    801.6×
  145. 145VolosThessaly, Greece
    801.6×
  146. 145Mexico CityMexico City, Mexico
    801.6×
  147. 147VereenigingGauteng, South Africa
    801.6×
  148. 147eMbalenhleMpumalanga, South Africa
    801.6×
  149. 149PátraWest Greece, Greece
    791.6×
  150. 150Gorzów WielkopolskiLubusz, Poland
    791.6×
  151. 151Ga-RankuwaNorth West, South Africa
    791.6×
  152. 152BohumínMoravian-Silesian Region, Czechia
    781.6×
  153. 152Ciudad General EscobedoNuevo León, Mexico
    781.6×
  154. 154CuernavacaMorelos, Mexico
    781.6×
  155. 155TratTrat, Thailand
    781.6×
  156. 155FanlingNorth District, Hong Kong
    781.6×
  157. 157BydgoszczKujawsko-Pomorskie, Poland
    781.6×
  158. 157TocopillaAntofagasta, Chile
    781.6×
  159. 159ŻaryLubusz, Poland
    781.6×
  160. 160Nakhon RatchasimaNakhon Ratchasima, Thailand
    771.6×
  161. 161TalaganteSantiago Metropolitan, Chile
    771.5×
  162. 161León de los AldamaGuanajuato, Mexico
    771.5×
  163. 163LiberecLiberec Region, Czechia
    771.5×
  164. 164OstravaMoravian-Silesian Region, Czechia
    771.5×
  165. 164KościerzynaPomerania, Poland
    771.5×
  166. 166Mong KokYau Tsim Mong District, Hong Kong
    771.5×
  167. 167Ciudad JuárezChihuahua, Mexico
    761.5×
  168. 168Wan ChaiWan Chai, Hong Kong
    761.5×
  169. 169TalcahuanoBiobio, Chile
    761.5×
  170. 170ŚwiecieKujawsko-Pomorskie, Poland
    761.5×
  171. 171KatowiceSilesia, Poland
    751.5×
  172. 171AricaArica y Parinacota Region, Chile
    751.5×
  173. 173Tin Shui WaiYuen Long, Hong Kong
    751.5×
  174. 173EdinburgTexas, United States
    751.5×
  175. 175San CarlosÑuble, Chile
    751.5×
  176. 176Los ÁngelesBiobio, Chile
    751.5×
  177. 177CuricóMaule Region, Chile
    741.4×
  178. 177San Pedro de la PazBiobio, Chile
    741.4×
  179. 179RengoO'Higgins Region, Chile
    741.4×
  180. 180BrakpanGauteng, South Africa
    741.4×
  181. 181LinaresMaule Region, Chile
    741.4×
  182. 181CoronelBiobio, Chile
    741.4×
  183. 183Tsuen WanTsuen Wan, Hong Kong
    741.4×
  184. 184Tai PoTai Po, Hong Kong
    731.4×
  185. 184San Juan del RíoQuerétaro, Mexico
    731.4×
  186. 186TarnówLesser Poland, Poland
    731.4×
  187. 186QuinteroValparaiso, Chile
    731.4×
  188. 188PułtuskMazovia, Poland
    731.4×
  189. 188QuillotaValparaiso, Chile
    731.4×
  190. 188Corpus ChristiTexas, United States
    731.4×
  191. 191Viña del MarValparaiso, Chile
    731.4×
  192. 191HualquiBiobio, Chile
    731.4×
  193. 191San Luis de la PazGuanajuato, Mexico
    731.4×
  194. 194Valašské MeziříčíZlín, Czechia
    721.4×
  195. 194TijuanaBaja California, Mexico
    721.4×
  196. 196ToméBiobio, Chile
    721.4×
  197. 196CauquenesMaule Region, Chile
    721.4×
  198. 198BitolaBitola, North Macedonia
    721.4×
  199. 199FairbanksAlaska, United States
    721.4×
  200. 200Kwai ChungKwai Tsing District, Hong Kong
    721.3×

Top 200 of 1,218 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 18, 2023, smogrank.com/history/2023-01-18 (accessed 2 Oct 2026).

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