SmogRank / History / January 27, 2023

Most polluted cities on January 27, 2023

1,191 cities ranked by their average PM2.5 over the day; the worst was Gómez Palacio, Mexico, at 985.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during January 27, 2023. All episodes.

← Gómez Palacio 985.0 µg/m³ 900 µg/m³15 WHO 24-hour guideline
Every city ranked for January 27, 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+65.7×
  2. 2Dhakalow-cost sensorsDhaka Division, Bangladesh
    35216.7×
  3. 3DushanbeDushanbe, Tajikistan
    24611.4×
  4. 4SalorTashkent Region, Uzbekistan
    23210.5×
  5. 5Almatylow-cost sensorsAlmaty, Kazakhstan
    2109.0×
  6. 6Abujalow-cost sensorsFCT, Nigeria
    2058.7×
  7. 7ZacatecasZacatecas, Mexico
    2038.5×
  8. 8N'DjamenaN’Djaména, Chad
    2028.5×
  9. 9MumbaiMaharashtra, India
    1967.9×
  10. 10Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    1907.4×
  11. 11Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1846.8×
  12. 12DelhiDelhi, India
    1836.7×
  13. 13Lahorelow-cost sensorsPunjab, Pakistan
    1806.4×
  14. 14AguascalientesAguascalientes, Mexico
    1796.3×
  15. 15BaghdadBaghdad, Iraq
    1776.2×
  16. 16AlexandriaAlexandria, Egypt
    1776.2×
  17. 17Islamabadlow-cost sensorsIslamabad, Pakistan
    1725.7×
  18. 18Yerevanlow-cost sensorsYerevan, Armenia
    1675.2×
  19. 19HyderabadTelangana, India
    1634.9×
  20. 20KigaliKigali, Rwanda
    1604.6×
  21. 21SukhothaiSukhothai, Thailand
    1584.4×
  22. 22LampangLampang, Thailand
    1574.3×
  23. 23Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1574.2×
  24. 24Kampalalow-cost sensorsCentral Region, Uganda
    1564.2×
  25. 25RatchaburiRatchaburi, Thailand
    1564.2×
  26. 26HanoiHanoi, Vietnam
    1564.2×
  27. 26AranyaprathetSa Kaeo, Thailand
    1564.2×
  28. 28Khlong Sam WaBangkok, Thailand
    1564.2×
  29. 29LamphunLamphun, Thailand
    1554.1×
  30. 30Ban Samae DamBangkok, Thailand
    1554.1×
  31. 31Nong KhaemBangkok, Thailand
    1554.1×
  32. 31Lat KrabangBangkok, Thailand
    1554.1×
  33. 33Samut SakhonSamut Sakhon, Thailand
    1554.1×
  34. 34Bang Khun ThianBangkok, Thailand
    1554.0×
  35. 35Khan Na YaoBangkok, Thailand
    1533.9×
  36. 36Lak SiBangkok, Thailand
    1533.9×
  37. 37Bang NaBangkok, Thailand
    1523.8×
  38. 38Nakhon PathomNakhon Pathom, Thailand
    1523.8×
  39. 39NanNan, Thailand
    1513.7×
  40. 40Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    1513.7×
  41. 41Nong ChokBangkok, Thailand
    1503.7×
  42. 41Bueng KumBangkok, Thailand
    1503.7×
  43. 43UttaraditUttaradit, Thailand
    1503.7×
  44. 43PhichitPhichit, Thailand
    1503.7×
  45. 43Saphan SungBangkok, Thailand
    1503.7×
  46. 46Mae SotTak, Thailand
    1493.7×
  47. 47Chiang RaiChiang Rai, Thailand
    1473.6×
  48. 48Nong Bua LamphuNong Bua Lamphu, Thailand
    1423.5×
  49. 48BangkokBangkok, Thailand
    1423.5×
  50. 50PhetchabunPhetchabun, Thailand
    1423.5×
  51. 51Nakhon RatchasimaNakhon Ratchasima, Thailand
    1413.5×
  52. 52Bang KapiBangkok, Thailand
    1413.4×
  53. 53Mueang NonthaburiNonthaburi, Thailand
    1393.4×
  54. 54Tha BoNong Khai, Thailand
    1383.4×
  55. 55Mae SaiChiang Rai, Thailand
    1383.4×
  56. 56Karachilow-cost sensorsSindh, Pakistan
    1373.4×
  57. 57Khlong LuangPathum Thani, Thailand
    1373.3×
  58. 58Lop BuriLopburi, Thailand
    1343.3×
  59. 59Kamphaeng PhetKamphaeng Phet, Thailand
    1333.2×
  60. 59Jastrzębie ZdrójSilesia, Poland
    1333.2×
  61. 61Ban Khlong PrawetBangkok, Thailand
    1313.2×
  62. 62Ban ChangRayong, Thailand
    1303.1×
  63. 63ŁaskŁódź Voivodeship, Poland
    1293.1×
  64. 64Laem ChabangChon Buri, Thailand
    1293.1×
  65. 65Sai MaiBangkok, Thailand
    1283.1×
  66. 66RayongRayong, Thailand
    1283.1×
  67. 67Nakhon SawanNakhon Sawan, Thailand
    1273.1×
  68. 68YangonYangon, Myanmar
    1273.1×
  69. 69Hua HinPrachuap Khiri Khan, Thailand
    1263.0×
  70. 70Suphan BuriSuphan Buri, Thailand
    1263.0×
  71. 71Phra PradaengSamut Prakan, Thailand
    1243.0×
  72. 72Addis AbabaAddis Ababa, Ethiopia
    1233.0×
  73. 73Kathmandulow-cost sensorsBagmati Province, Nepal
    1202.9×
  74. 74OtwockMazovia, Poland
    1162.8×
  75. 75Chiang MaiChiang Mai, Thailand
    1142.7×
  76. 76ColomboWestern Province, Sri Lanka
    1142.7×
  77. 77RacibórzSilesia, Poland
    1132.7×
  78. 78TakTak, Thailand
    1122.7×
  79. 78ChaiyaphumChaiyaphum, Thailand
    1122.7×
  80. 80BakuBaki, Azerbaijan
    1112.6×
  81. 81RzeszówSubcarpathia, Poland
    1112.6×
  82. 82VisbyGotland, Sweden
    1102.6×
  83. 83Bielsko-BialaSilesia, Poland
    1092.6×
  84. 84SaraburiSaraburi, Thailand
    1092.6×
  85. 85PakxanBolikhamsai, Laos
    1072.5×
  86. 86Český TěšínMoravian-Silesian Region, Czechia
    1072.5×
  87. 87MukdahanMukdahan, Thailand
    1062.5×
  88. 88AmmanAmman, Jordan
    1062.5×
  89. 89ŻyrardówMazovia, Poland
    1042.4×
  90. 90RadomMazovia, Poland
    1032.4×
  91. 90Ban Talat BuengChon Buri, Thailand
    1032.4×
  92. 92MexicaliBaja California, Mexico
    1022.4×
  93. 93HavířovMoravian-Silesian Region, Czechia
    1022.4×
  94. 94Buri RamBuriram, Thailand
    1012.4×
  95. 95OstravaMoravian-Silesian Region, Czechia
    1012.4×
  96. 96WawerMazovia, Poland
    1002.4×
  97. 97AthensAttica, Greece
    1002.3×
  98. 97PułtuskMazovia, Poland
    1002.3×
  99. 99Sakon NakhonSakon Nakhon, Thailand
    992.3×
  100. 100KutnoŁódź Voivodeship, Poland
    992.3×
  101. 101ChisinauChișinău Municipality, Moldova
    992.3×
  102. 101San Mateo AtencoMéxico, Mexico
    992.3×
  103. 103TocopillaAntofagasta, Chile
    992.3×
  104. 104Udon ThaniUdon Thani, Thailand
    972.3×
  105. 105WrocławLower Silesia, Poland
    972.3×
  106. 106HanfordCalifornia, United States
    972.2×
  107. 107ShanghaiShanghai, China
    962.2×
  108. 108TolucaMéxico, Mexico
    962.2×
  109. 109SiedlceMazovia, Poland
    952.2×
  110. 110ZgierzŁódź Voivodeship, Poland
    952.2×
  111. 110TurinPiedmont, Italy
    952.2×
  112. 112KatowiceSilesia, Poland
    942.2×
  113. 113LublinLublin, Poland
    942.1×
  114. 114KalasinKalasin, Thailand
    932.1×
  115. 115Roi EtRoi Et, Thailand
    932.1×
  116. 116Frýdek-MístekMoravian-Silesian Region, Czechia
    932.1×
  117. 117GuangzhouGuangdong, China
    932.1×
  118. 117PłockMazovia, Poland
    932.1×
  119. 119GarcíaNuevo León, Mexico
    922.1×
  120. 120BitolaBitola, North Macedonia
    922.1×
  121. 120BamakoBamako, Mali
    922.1×
  122. 122TratTrat, Thailand
    922.1×
  123. 122XonacatlánMéxico, Mexico
    922.1×
  124. 124Wan ChaiWan Chai, Hong Kong
    912.1×
  125. 125Ciudad Benito JuárezNuevo León, Mexico
    912.0×
  126. 126Villa Poeta José Gálvez BarrenecheaLima region, Peru
    912.0×
  127. 127TarnówLesser Poland, Poland
    902.0×
  128. 128WarsawMazovia, Poland
    902.0×
  129. 128StarachowiceŚwiętokrzyskie, Poland
    902.0×
  130. 128Konstancin-JeziornaMazovia, Poland
    902.0×
  131. 131Cluj-NapocaCluj County, Romania
    902.0×
  132. 131Santa CatarinaNuevo León, Mexico
    902.0×
  133. 131CorcoranCalifornia, United States
    902.0×
  134. 134ChanthaburiChanthaburi, Thailand
    902.0×
  135. 134CelayaGuanajuato, Mexico
    902.0×
  136. 136Tsuen WanTsuen Wan, Hong Kong
    892.0×
  137. 136RancaguaO'Higgins Region, Chile
    892.0×
  138. 138VisaliaCalifornia, United States
    881.9×
  139. 139NiskoSubcarpathia, Poland
    881.9×
  140. 140Valašské MeziříčíZlín, Czechia
    881.9×
  141. 140TijuanaBaja California, Mexico
    881.9×
  142. 140IrapuatoGuanajuato, Mexico
    881.9×
  143. 143KanchanaburiKanchanaburi, Thailand
    871.9×
  144. 144PruszkówMazovia, Poland
    871.9×
  145. 144MeylanAuvergne-Rhône-Alpes, France
    871.9×
  146. 146ŁukówLublin, Poland
    871.9×
  147. 146BiałystokPodlasie, Poland
    871.9×
  148. 148Ciudad JuárezChihuahua, Mexico
    861.9×
  149. 149LimaLima Province, Peru
    861.9×
  150. 150SatunSatun, Thailand
    861.9×
  151. 150GuadalajaraJalisco, Mexico
    861.9×
  152. 152BakersfieldCalifornia, United States
    861.9×
  153. 153NitraNitra Region, Slovakia
    851.8×
  154. 153Kędzierzyn-KoźleOpole Voivodeship, Poland
    851.8×
  155. 153FresnoCalifornia, United States
    851.8×
  156. 153TurlockCalifornia, United States
    851.8×
  157. 157KrosnoSubcarpathia, Poland
    851.8×
  158. 157ModestoCalifornia, United States
    851.8×
  159. 159Tin Shui WaiYuen Long, Hong Kong
    851.8×
  160. 160GyőrGyőr-Moson-Sopron, Hungary
    851.8×
  161. 161Ga-RankuwaNorth West, South Africa
    841.8×
  162. 162KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    831.8×
  163. 162MielecSubcarpathia, Poland
    831.8×
  164. 164JarosławSubcarpathia, Poland
    831.8×
  165. 165FanlingNorth District, Hong Kong
    831.8×
  166. 166LoeiLoei, Thailand
    831.7×
  167. 166KrakówLesser Poland, Poland
    831.7×
  168. 168Mong KokYau Tsim Mong District, Hong Kong
    831.7×
  169. 169VictoriaCentral and Western, Hong Kong
    821.7×
  170. 169KrapkowiceOpole Voivodeship, Poland
    821.7×
  171. 171GrajewoPodlasie, Poland
    821.7×
  172. 171Tepeji del Río de OcampoHidalgo, Mexico
    821.7×
  173. 173Si Sa KetSi Sa Ket, Thailand
    821.7×
  174. 173ToruńKujawsko-Pomorskie, Poland
    821.7×
  175. 173León de los AldamaGuanajuato, Mexico
    821.7×
  176. 176OpoleOpole Voivodeship, Poland
    811.7×
  177. 177Kwai ChungKwai Tsing District, Hong Kong
    811.7×
  178. 177MarseilleProvence-Alpes-Côte d'Azur, France
    811.7×
  179. 177Puente AltoSantiago Metropolitan, Chile
    811.7×
  180. 180AugustówPodlasie, Poland
    811.7×
  181. 181TrnavaTrnava Region, Slovakia
    811.7×
  182. 182KłodzkoLower Silesia, Poland
    801.7×
  183. 183Surat ThaniSurat Thani, Thailand
    801.7×
  184. 183Ciudad NezahualcoyotlMéxico, Mexico
    801.7×
  185. 185JasłoSubcarpathia, Poland
    801.6×
  186. 185BogotáBogota D.C., Colombia
    801.6×
  187. 187Sha TinSha Tin, Hong Kong
    801.6×
  188. 188AcharnésAttica, Greece
    801.6×
  189. 188DrammenBuskerud, Norway
    801.6×
  190. 188San Luis PotosíSan Luis Potosí, Mexico
    801.6×
  191. 188San Salvador TizatlalliMéxico, Mexico
    801.6×
  192. 192MonterreyNuevo León, Mexico
    801.6×
  193. 193SalamancaGuanajuato, Mexico
    791.6×
  194. 194ZlínZlín, Czechia
    791.6×
  195. 195Spišská Nová VesKošice Region, Slovakia
    791.6×
  196. 196BelgradeCentral Serbia, Serbia
    791.6×
  197. 196San Tung Chung HangIslands, Hong Kong
    791.6×
  198. 198Sau Mau PingKwun Tong District, Hong Kong
    791.6×
  199. 198Accralow-cost sensorsGreater Accra, Ghana
    791.6×
  200. 198StocktonCalifornia, United States
    791.6×

Top 200 of 1,191 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 27, 2023, smogrank.com/history/2023-01-27 (accessed 2 Oct 2026).

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