SmogRank / History / January 17, 2023

Most polluted cities on January 17, 2023

1,220 cities ranked by their average PM2.5 over the day; the worst was Gómez Palacio, Mexico, at 510.2 µg/m³. Each city's own local calendar day.

← Gómez Palacio 510.2 µg/m³ 500 µg/m³15 WHO 24-hour guideline
Every city ranked for January 17, 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+34.0×
  2. 2Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    500+30.1×
  3. 3N'DjamenaN’Djaména, Chad
    27413.3×
  4. 4Dhakalow-cost sensorsDhaka Division, Bangladesh
    26512.7×
  5. 5TongaatKwaZulu-Natal, South Africa
    25411.9×
  6. 6Lahorelow-cost sensorsPunjab, Pakistan
    23910.9×
  7. 7DelhiDelhi, India
    22810.2×
  8. 8SalorTashkent Region, Uzbekistan
    2219.7×
  9. 9Karachilow-cost sensorsSindh, Pakistan
    2179.5×
  10. 10MumbaiMaharashtra, India
    2129.1×
  11. 11DushanbeDushanbe, Tajikistan
    2048.6×
  12. 12Almatylow-cost sensorsAlmaty, Kazakhstan
    2018.4×
  13. 13Kampalalow-cost sensorsCentral Region, Uganda
    1978.1×
  14. 14AlexandriaAlexandria, Egypt
    1756.0×
  15. 15BaghdadBaghdad, Iraq
    1755.9×
  16. 16Islamabadlow-cost sensorsIslamabad, Pakistan
    1745.8×
  17. 17Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1685.4×
  18. 17Kathmandulow-cost sensorsBagmati Province, Nepal
    1685.4×
  19. 19KigaliKigali, Rwanda
    1665.1×
  20. 20AshgabatAshgabat, Turkmenistan
    1624.7×
  21. 21GuadalajaraJalisco, Mexico
    1594.4×
  22. 22Accralow-cost sensorsGreater Accra, Ghana
    1533.9×
  23. 23Lop BuriLopburi, Thailand
    1483.6×
  24. 24San Francisco TlalcilalcalpanMéxico, Mexico
    1483.6×
  25. 25TlaquepaqueJalisco, Mexico
    1483.6×
  26. 26HanoiHanoi, Vietnam
    1453.6×
  27. 27CholulaPuebla, Mexico
    1443.5×
  28. 28Ciudad Benito JuárezNuevo León, Mexico
    1363.3×
  29. 29San Mateo AtencoMéxico, Mexico
    1343.3×
  30. 30LamphunLamphun, Thailand
    1333.2×
  31. 31PueblaPuebla, Mexico
    1323.2×
  32. 32Hacienda Santa FeJalisco, Mexico
    1253.0×
  33. 33TolucaMéxico, Mexico
    1243.0×
  34. 34Mae SotTak, Thailand
    1233.0×
  35. 35BadgerAlaska, United States
    1212.9×
  36. 36PhichitPhichit, Thailand
    1212.9×
  37. 36ShanghaiShanghai, China
    1212.9×
  38. 38Si Maha PhotPrachin Buri, Thailand
    1202.9×
  39. 39NanNan, Thailand
    1192.8×
  40. 40LampangLampang, Thailand
    1182.8×
  41. 40Banja LukaSrpska, Bosnia and Herzegovina
    1182.8×
  42. 42LublinLublin, Poland
    1182.8×
  43. 43Suphan BuriSuphan Buri, Thailand
    1162.8×
  44. 44Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    1152.7×
  45. 45Mae SaiChiang Rai, Thailand
    1142.7×
  46. 46RatchaburiRatchaburi, Thailand
    1142.7×
  47. 46Grande PrairieAlberta, Canada
    1142.7×
  48. 48Nakhon SawanNakhon Sawan, Thailand
    1132.7×
  49. 48Bueng KumBangkok, Thailand
    1132.7×
  50. 50PhayaoPhayao, Thailand
    1132.7×
  51. 50Kamphaeng PhetKamphaeng Phet, Thailand
    1132.7×
  52. 52Khlong LuangPathum Thani, Thailand
    1112.6×
  53. 53YangonYangon, Myanmar
    1102.6×
  54. 53XonacatlánMéxico, Mexico
    1102.6×
  55. 55Ciudad NezahualcoyotlMéxico, Mexico
    1102.6×
  56. 56AranyaprathetSa Kaeo, Thailand
    1092.6×
  57. 57Chiang RaiChiang Rai, Thailand
    1072.5×
  58. 58BamakoBamako, Mali
    1062.5×
  59. 59Ecatepec de MorelosMéxico, Mexico
    1062.5×
  60. 60Nong KhaemBangkok, Thailand
    1052.5×
  61. 61ZapopanJalisco, Mexico
    1042.4×
  62. 62Naucalpan de JuárezMéxico, Mexico
    1032.4×
  63. 63Bang NaBangkok, Thailand
    1022.4×
  64. 64UttaraditUttaradit, Thailand
    1022.4×
  65. 65Khan Na YaoBangkok, Thailand
    1022.4×
  66. 66Zacatepec de HidalgoMorelos, Mexico
    1002.4×
  67. 67SliemaTas-Sliema, Malta
    992.3×
  68. 67TlaxcalaTlaxcala, Mexico
    992.3×
  69. 69Saphan SungBangkok, Thailand
    992.3×
  70. 70Lat KrabangBangkok, Thailand
    992.3×
  71. 71Şabāḩ as SālimMubārak al Kabīr, Kuwait
    982.3×
  72. 71PhetchabunPhetchabun, Thailand
    982.3×
  73. 71Ciudad ApodacaNuevo León, Mexico
    982.3×
  74. 74Villa Poeta José Gálvez BarrenecheaLima region, Peru
    972.3×
  75. 75Chiang MaiChiang Mai, Thailand
    972.3×
  76. 75SaraburiSaraburi, Thailand
    972.3×
  77. 77Bang Khun ThianBangkok, Thailand
    962.2×
  78. 78VeracruzVeracruz, Mexico
    962.2×
  79. 78Lak SiBangkok, Thailand
    962.2×
  80. 80Sai MaiBangkok, Thailand
    962.2×
  81. 81Nong ChokBangkok, Thailand
    952.2×
  82. 82San Salvador TizatlalliMéxico, Mexico
    952.2×
  83. 83Ban Khlong PrawetBangkok, Thailand
    932.1×
  84. 84Nakhon RatchasimaNakhon Ratchasima, Thailand
    932.1×
  85. 84Ban Samae DamBangkok, Thailand
    932.1×
  86. 84Bang KapiBangkok, Thailand
    932.1×
  87. 87MonterreyNuevo León, Mexico
    922.1×
  88. 88Cadereyta JiménezNuevo León, Mexico
    922.1×
  89. 89San Luis PotosíSan Luis Potosí, Mexico
    922.1×
  90. 90Ban HouakhouaBokeo, Laos
    922.1×
  91. 91BéthuneHauts-de-France, France
    912.0×
  92. 92NiskoSubcarpathia, Poland
    912.0×
  93. 93Ciudad General EscobedoNuevo León, Mexico
    892.0×
  94. 94Mexico CityMexico City, Mexico
    892.0×
  95. 95AlessandriaPiedmont, Italy
    892.0×
  96. 95CelayaGuanajuato, Mexico
    892.0×
  97. 97RacibórzSilesia, Poland
    881.9×
  98. 98BangkokBangkok, Thailand
    871.9×
  99. 99OtwockMazovia, Poland
    861.9×
  100. 100LoeiLoei, Thailand
    861.9×
  101. 101RancaguaO'Higgins Region, Chile
    851.8×
  102. 101LimaLima Province, Peru
    851.8×
  103. 103Ga-RankuwaNorth West, South Africa
    851.8×
  104. 103Santa CatarinaNuevo León, Mexico
    851.8×
  105. 105BakuBaki, Azerbaijan
    851.8×
  106. 106AricaArica y Parinacota Region, Chile
    851.8×
  107. 107AbasoloGuanajuato, Mexico
    841.8×
  108. 108PułtuskMazovia, Poland
    841.8×
  109. 109BucharestBucharest, Romania
    831.8×
  110. 110Mueang NonthaburiNonthaburi, Thailand
    831.7×
  111. 111MinatitlánVeracruz, Mexico
    831.7×
  112. 112KłodzkoLower Silesia, Poland
    821.7×
  113. 113StarachowiceŚwiętokrzyskie, Poland
    821.7×
  114. 114Ban Talat BuengChon Buri, Thailand
    811.7×
  115. 114SantiagoSantiago Metropolitan, Chile
    811.7×
  116. 116Pachuca de SotoHidalgo, Mexico
    811.7×
  117. 117Nakhon PathomNakhon Pathom, Thailand
    801.7×
  118. 117GarcíaNuevo León, Mexico
    801.7×
  119. 117León de los AldamaGuanajuato, Mexico
    801.7×
  120. 120ChaiyaphumChaiyaphum, Thailand
    801.6×
  121. 121Sevlievolow-cost sensorsGabrovo, Bulgaria
    791.6×
  122. 122GdyniaPomerania, Poland
    791.6×
  123. 123Puente AltoSantiago Metropolitan, Chile
    791.6×
  124. 124VolosThessaly, Greece
    781.6×
  125. 124RayongRayong, Thailand
    781.6×
  126. 124TurinPiedmont, Italy
    781.6×
  127. 127Samut SakhonSamut Sakhon, Thailand
    781.6×
  128. 128WawerMazovia, Poland
    781.6×
  129. 129Tha YangPhetchaburi, Thailand
    771.6×
  130. 129TalaganteSantiago Metropolitan, Chile
    771.6×
  131. 131HualpénBiobio, Chile
    771.5×
  132. 131CoquimboCoquimbo Region, Chile
    771.5×
  133. 133MiędzyrzeczLubusz, Poland
    771.5×
  134. 134ŻyrardówMazovia, Poland
    761.5×
  135. 134AugustówPodlasie, Poland
    761.5×
  136. 134TakTak, Thailand
    761.5×
  137. 134KatowiceSilesia, Poland
    761.5×
  138. 138DouaiHauts-de-France, France
    761.5×
  139. 139ColomboWestern Province, Sri Lanka
    761.5×
  140. 139SzamotułyGreater Poland, Poland
    761.5×
  141. 139QuinteroValparaiso, Chile
    761.5×
  142. 139MexicaliBaja California, Mexico
    761.5×
  143. 143Viña del MarValparaiso, Chile
    761.5×
  144. 144Jastrzębie ZdrójSilesia, Poland
    761.5×
  145. 144HamiltonOntario, Canada
    761.5×
  146. 146NacimientoBiobio, Chile
    751.5×
  147. 146LinaresMaule Region, Chile
    751.5×
  148. 148ChisinauChișinău Municipality, Moldova
    751.5×
  149. 148EdinburgTexas, United States
    751.5×
  150. 150CuernavacaMorelos, Mexico
    751.5×
  151. 150RengoO'Higgins Region, Chile
    751.5×
  152. 152Tai PoTai Po, Hong Kong
    751.5×
  153. 153QuillotaValparaiso, Chile
    751.5×
  154. 154KanchanaburiKanchanaburi, Thailand
    741.4×
  155. 155GuangzhouGuangdong, China
    741.4×
  156. 156Dimitrovgradlow-cost sensorsHaskovo, Bulgaria
    741.4×
  157. 157Tin Shui WaiYuen Long, Hong Kong
    741.4×
  158. 157Jelenia GóraLower Silesia, Poland
    741.4×
  159. 159LancasterPennsylvania, United States
    741.4×
  160. 160Tsuen WanTsuen Wan, Hong Kong
    741.4×
  161. 160ŁaskŁódź Voivodeship, Poland
    741.4×
  162. 162ThessaloníkiCentral Macedonia, Greece
    731.4×
  163. 162Phra PradaengSamut Prakan, Thailand
    731.4×
  164. 162Buri RamBuriram, Thailand
    731.4×
  165. 165JarosławSubcarpathia, Poland
    731.4×
  166. 165TratTrat, Thailand
    731.4×
  167. 165Mong KokYau Tsim Mong District, Hong Kong
    731.4×
  168. 165ZgierzŁódź Voivodeship, Poland
    731.4×
  169. 169DagenhamEngland, United Kingdom
    731.4×
  170. 170MostaIl-Mosta, Malta
    731.4×
  171. 170CuranilahueBiobio, Chile
    731.4×
  172. 172TalcahuanoBiobio, Chile
    731.4×
  173. 173San Luis de la PazGuanajuato, Mexico
    721.4×
  174. 174RužomberokŽilina Region, Slovakia
    721.4×
  175. 174KrapkowiceOpole Voivodeship, Poland
    721.4×
  176. 174TalcaMaule Region, Chile
    721.4×
  177. 174San CarlosÑuble, Chile
    721.4×
  178. 174Puerto VarasLos Lagos Region, Chile
    721.4×
  179. 174ConcónValparaiso, Chile
    721.4×
  180. 180FanlingNorth District, Hong Kong
    721.4×
  181. 180ThorntonColorado, United States
    721.4×
  182. 180San Pedro de la PazBiobio, Chile
    721.4×
  183. 183DerryNorthern Ireland, United Kingdom
    721.4×
  184. 183WłocławekKujawsko-Pomorskie, Poland
    721.4×
  185. 183ToméBiobio, Chile
    721.4×
  186. 183CuricóMaule Region, Chile
    721.4×
  187. 187CauquenesMaule Region, Chile
    721.3×
  188. 188BeijingBeijing, China
    711.3×
  189. 188GraysEngland, United Kingdom
    711.3×
  190. 190TrentoTrentino-Alto Adige, Italy
    711.3×
  191. 191Hua HinPrachuap Khiri Khan, Thailand
    711.3×
  192. 191Sainte-Geneviève-des-BoisÎle-de-France, France
    711.3×
  193. 191La SerenaCoquimbo Region, Chile
    711.3×
  194. 194Bielsko-BialaSilesia, Poland
    711.3×
  195. 194Fort LauderdaleFlorida, United States
    711.3×
  196. 196PłockMazovia, Poland
    701.3×
  197. 197RadomMazovia, Poland
    701.3×
  198. 197ŁukówLublin, Poland
    701.3×
  199. 197BolzanoTrentino-Alto Adige, Italy
    701.3×
  200. 197HualquiBiobio, Chile
    701.3×

Top 200 of 1,220 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

Use this board

SmogRank, most polluted cities, PM2.5, January 17, 2023, smogrank.com/history/2023-01-17 (accessed 2 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.