SmogRank / History / January 28, 2023

Most polluted cities on January 28, 2023

1,270 cities ranked by their average PM2.5 over the day; the worst was Gómez Palacio, Mexico, at 986.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during January 28, 2023. All episodes.

← Gómez Palacio 986.0 µg/m³ 900 µg/m³15 WHO 24-hour guideline
Every city ranked for January 28, 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. 2Almatylow-cost sensorsAlmaty, Kazakhstan
    25712.1×
  3. 3Lahorelow-cost sensorsPunjab, Pakistan
    25411.9×
  4. 4Dhakalow-cost sensorsDhaka Division, Bangladesh
    24511.3×
  5. 5N'DjamenaN’Djaména, Chad
    2239.9×
  6. 6DushanbeDushanbe, Tajikistan
    2179.4×
  7. 7DelhiDelhi, India
    1978.1×
  8. 8Islamabadlow-cost sensorsIslamabad, Pakistan
    1947.8×
  9. 9Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1937.7×
  10. 10MumbaiMaharashtra, India
    1846.9×
  11. 11HyderabadTelangana, India
    1806.5×
  12. 12Ciudad Benito JuárezNuevo León, Mexico
    1796.4×
  13. 13Abujalow-cost sensorsFCT, Nigeria
    1735.8×
  14. 14SalorTashkent Region, Uzbekistan
    1735.8×
  15. 15MonterreyNuevo León, Mexico
    1705.5×
  16. 16Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    1695.4×
  17. 17GarcíaNuevo León, Mexico
    1624.8×
  18. 18BaghdadBaghdad, Iraq
    1624.7×
  19. 19Santa CatarinaNuevo León, Mexico
    1614.7×
  20. 20LampangLampang, Thailand
    1594.5×
  21. 21Karachilow-cost sensorsSindh, Pakistan
    1564.2×
  22. 22LamphunLamphun, Thailand
    1554.1×
  23. 22HanoiHanoi, Vietnam
    1554.1×
  24. 24AlexandriaAlexandria, Egypt
    1554.1×
  25. 25Kathmandulow-cost sensorsBagmati Province, Nepal
    1544.0×
  26. 26YangonYangon, Myanmar
    1523.8×
  27. 27NanNan, Thailand
    1523.8×
  28. 28Ciudad General EscobedoNuevo León, Mexico
    1493.7×
  29. 29RatchaburiRatchaburi, Thailand
    1483.6×
  30. 30SukhothaiSukhothai, Thailand
    1443.5×
  31. 31Kamphaeng PhetKamphaeng Phet, Thailand
    1413.5×
  32. 32DrammenBuskerud, Norway
    1403.4×
  33. 33Ciudad ApodacaNuevo León, Mexico
    1333.2×
  34. 34Mae SotTak, Thailand
    1313.2×
  35. 35Mae SaiChiang Rai, Thailand
    1303.2×
  36. 36Chiang RaiChiang Rai, Thailand
    1303.2×
  37. 37Chiang MaiChiang Mai, Thailand
    1303.1×
  38. 38MexicaliBaja California, Mexico
    1283.1×
  39. 39KigaliKigali, Rwanda
    1263.0×
  40. 40TakTak, Thailand
    1253.0×
  41. 41UttaraditUttaradit, Thailand
    1253.0×
  42. 42Samut SakhonSamut Sakhon, Thailand
    1222.9×
  43. 43San Mateo AtencoMéxico, Mexico
    1212.9×
  44. 44Nong KhaemBangkok, Thailand
    1212.9×
  45. 44Khlong Sam WaBangkok, Thailand
    1212.9×
  46. 46Kampalalow-cost sensorsCentral Region, Uganda
    1202.9×
  47. 46BakuBaki, Azerbaijan
    1202.9×
  48. 48Banja LukaSrpska, Bosnia and Herzegovina
    1152.7×
  49. 49Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1142.7×
  50. 50BitolaBitola, North Macedonia
    1132.7×
  51. 51AshgabatAshgabat, Turkmenistan
    1132.7×
  52. 52Lak SiBangkok, Thailand
    1112.6×
  53. 53Bueng KumBangkok, Thailand
    1112.6×
  54. 54TolucaMéxico, Mexico
    1102.6×
  55. 55Villa Poeta José Gálvez BarrenecheaLima region, Peru
    1102.6×
  56. 56Bang Khun ThianBangkok, Thailand
    1102.6×
  57. 57VolosThessaly, Greece
    1092.6×
  58. 57Hua HinPrachuap Khiri Khan, Thailand
    1092.6×
  59. 59Nakhon PathomNakhon Pathom, Thailand
    1072.5×
  60. 60MeylanAuvergne-Rhône-Alpes, France
    1062.5×
  61. 61Nakhon SawanNakhon Sawan, Thailand
    1052.5×
  62. 62HanfordCalifornia, United States
    1052.5×
  63. 63Mueang NonthaburiNonthaburi, Thailand
    1042.4×
  64. 64ChisinauChișinău Municipality, Moldova
    1032.4×
  65. 65Tha BoNong Khai, Thailand
    1022.4×
  66. 66Tepeji del Río de OcampoHidalgo, Mexico
    1012.4×
  67. 67Ban ChangRayong, Thailand
    1002.4×
  68. 68VisaliaCalifornia, United States
    1002.4×
  69. 69Ban HouakhouaBokeo, Laos
    1002.3×
  70. 69Khan Na YaoBangkok, Thailand
    1002.3×
  71. 71Sai MaiBangkok, Thailand
    992.3×
  72. 72GuadalajaraJalisco, Mexico
    992.3×
  73. 73BelgradeCentral Serbia, Serbia
    992.3×
  74. 74Khlong LuangPathum Thani, Thailand
    982.3×
  75. 74Bang KapiBangkok, Thailand
    982.3×
  76. 74Bang NaBangkok, Thailand
    982.3×
  77. 74CalexicoCalifornia, United States
    982.3×
  78. 78Suphan BuriSuphan Buri, Thailand
    982.3×
  79. 79ShanghaiShanghai, China
    982.3×
  80. 80CorcoranCalifornia, United States
    982.3×
  81. 81Ban Samae DamBangkok, Thailand
    982.3×
  82. 82RayongRayong, Thailand
    972.3×
  83. 83Saphan SungBangkok, Thailand
    972.3×
  84. 84SallanchesAuvergne-Rhône-Alpes, France
    972.2×
  85. 85BangkokBangkok, Thailand
    962.2×
  86. 86Cadereyta JiménezNuevo León, Mexico
    962.2×
  87. 87CelayaGuanajuato, Mexico
    962.2×
  88. 88FresnoCalifornia, United States
    952.2×
  89. 89Wan ChaiWan Chai, Hong Kong
    952.2×
  90. 90TurinPiedmont, Italy
    952.2×
  91. 91Lat KrabangBangkok, Thailand
    942.2×
  92. 92BakersfieldCalifornia, United States
    942.1×
  93. 93Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    932.1×
  94. 94GardanneProvence-Alpes-Côte d'Azur, France
    932.1×
  95. 95PátraWest Greece, Greece
    932.1×
  96. 96Jastrzębie ZdrójSilesia, Poland
    932.1×
  97. 97RadomMazovia, Poland
    922.1×
  98. 98Bielsko-BialaSilesia, Poland
    922.1×
  99. 99PhetchabunPhetchabun, Thailand
    912.0×
  100. 99LęborkPomerania, Poland
    912.0×
  101. 101BamakoBamako, Mali
    912.0×
  102. 102IrapuatoGuanajuato, Mexico
    912.0×
  103. 103PhuketPhuket, Thailand
    902.0×
  104. 104KhartoumKhartoum, Sudan
    902.0×
  105. 105Surat ThaniSurat Thani, Thailand
    902.0×
  106. 106SaraburiSaraburi, Thailand
    902.0×
  107. 107TocopillaAntofagasta, Chile
    902.0×
  108. 108Ban Khlong PrawetBangkok, Thailand
    892.0×
  109. 109GuangzhouGuangdong, China
    892.0×
  110. 110XonacatlánMéxico, Mexico
    881.9×
  111. 111SantiagoSantiago Metropolitan, Chile
    881.9×
  112. 111TijuanaBaja California, Mexico
    881.9×
  113. 113Tin Shui WaiYuen Long, Hong Kong
    871.9×
  114. 114LimaLima Province, Peru
    871.9×
  115. 115OsloOslo, Norway
    861.9×
  116. 116SiedlceMazovia, Poland
    861.9×
  117. 117PécsBaranya, Hungary
    861.9×
  118. 118Frýdek-MístekMoravian-Silesian Region, Czechia
    861.8×
  119. 118CholulaPuebla, Mexico
    861.8×
  120. 120Nong ChokBangkok, Thailand
    851.8×
  121. 121MarseilleProvence-Alpes-Côte d'Azur, France
    851.8×
  122. 122Si Maha PhotPrachin Buri, Thailand
    851.8×
  123. 122Český TěšínMoravian-Silesian Region, Czechia
    851.8×
  124. 124RacibórzSilesia, Poland
    841.8×
  125. 125ŁukówLublin, Poland
    841.8×
  126. 126Phra PradaengSamut Prakan, Thailand
    841.8×
  127. 127Ciudad NezahualcoyotlMéxico, Mexico
    841.8×
  128. 128NišCentral Serbia, Serbia
    841.8×
  129. 129Botevgradlow-cost sensorsSofia, Bulgaria
    831.8×
  130. 129RancaguaO'Higgins Region, Chile
    831.8×
  131. 131LublinLublin, Poland
    831.7×
  132. 131Valašské MeziříčíZlín, Czechia
    831.7×
  133. 133FanlingNorth District, Hong Kong
    821.7×
  134. 134MielecSubcarpathia, Poland
    821.7×
  135. 134QuinteroValparaiso, Chile
    821.7×
  136. 136OtwockMazovia, Poland
    821.7×
  137. 136Nakhon RatchasimaNakhon Ratchasima, Thailand
    821.7×
  138. 136HavířovMoravian-Silesian Region, Czechia
    821.7×
  139. 139Lop BuriLopburi, Thailand
    821.7×
  140. 140EsztergomKomárom-Esztergom, Hungary
    811.7×
  141. 141San Tung Chung HangIslands, Hong Kong
    811.7×
  142. 141Laem ChabangChon Buri, Thailand
    811.7×
  143. 141OstravaMoravian-Silesian Region, Czechia
    811.7×
  144. 144JeddahMecca Region, Saudi Arabia
    811.7×
  145. 144Sha TinSha Tin, Hong Kong
    811.7×
  146. 146VictoriaCentral and Western, Hong Kong
    801.7×
  147. 146Ecatepec de MorelosMéxico, Mexico
    801.7×
  148. 148TalaganteSantiago Metropolitan, Chile
    801.7×
  149. 149Aix-en-ProvenceProvence-Alpes-Côte d'Azur, France
    801.6×
  150. 149ZvolenBanská Bystrica Region, Slovakia
    801.6×
  151. 151TarnówLesser Poland, Poland
    801.6×
  152. 151MercedCalifornia, United States
    801.6×
  153. 153Mong KokYau Tsim Mong District, Hong Kong
    791.6×
  154. 153Kwai ChungKwai Tsing District, Hong Kong
    791.6×
  155. 153DunaújvárosFejér, Hungary
    791.6×
  156. 153ŁaskŁódź Voivodeship, Poland
    791.6×
  157. 153El PasoTexas, United States
    791.6×
  158. 158TratTrat, Thailand
    791.6×
  159. 159StarachowiceŚwiętokrzyskie, Poland
    791.6×
  160. 160Ga-RankuwaNorth West, South Africa
    791.6×
  161. 160Ciudad JuárezChihuahua, Mexico
    791.6×
  162. 162ZlínZlín, Czechia
    781.6×
  163. 162León de los AldamaGuanajuato, Mexico
    781.6×
  164. 164KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    781.6×
  165. 164RzeszówSubcarpathia, Poland
    781.6×
  166. 164TokozaGauteng, South Africa
    781.6×
  167. 167VitrollesProvence-Alpes-Côte d'Azur, France
    781.6×
  168. 167GyőrGyőr-Moson-Sopron, Hungary
    781.6×
  169. 169AthensAttica, Greece
    781.6×
  170. 169ChambéryAuvergne-Rhône-Alpes, France
    781.6×
  171. 171ColomboWestern Province, Sri Lanka
    781.6×
  172. 171Sau Mau PingKwun Tong District, Hong Kong
    781.6×
  173. 171KrapkowiceOpole Voivodeship, Poland
    781.6×
  174. 174SalamancaGuanajuato, Mexico
    771.6×
  175. 175GrenobleAuvergne-Rhône-Alpes, France
    771.5×
  176. 175ConcónValparaiso, Chile
    771.5×
  177. 177QuillotaValparaiso, Chile
    771.5×
  178. 178VeszprémVeszprém, Hungary
    771.5×
  179. 179BohumínMoravian-Silesian Region, Czechia
    771.5×
  180. 179PhoenixArizona, United States
    771.5×
  181. 181ChanthaburiChanthaburi, Thailand
    761.5×
  182. 181Tai PoTai Po, Hong Kong
    761.5×
  183. 181Puente AltoSantiago Metropolitan, Chile
    761.5×
  184. 184Tsuen WanTsuen Wan, Hong Kong
    761.5×
  185. 184HualpénBiobio, Chile
    761.5×
  186. 186San CarlosÑuble, Chile
    761.5×
  187. 187NiskoSubcarpathia, Poland
    761.5×
  188. 188BéthuneHauts-de-France, France
    761.5×
  189. 188San Luis PotosíSan Luis Potosí, Mexico
    761.5×
  190. 190OpoleOpole Voivodeship, Poland
    751.5×
  191. 190NacimientoBiobio, Chile
    751.5×
  192. 192KanchanaburiKanchanaburi, Thailand
    751.5×
  193. 192AranyaprathetSa Kaeo, Thailand
    751.5×
  194. 192MonacoMunicipality of Monaco, Monaco
    751.5×
  195. 195ZnojmoSouth Moravian, Czechia
    751.5×
  196. 195ZapopanJalisco, Mexico
    751.5×
  197. 197MaderaCalifornia, United States
    751.5×
  198. 197San Salvador TizatlalliMéxico, Mexico
    751.5×
  199. 199Sevlievolow-cost sensorsGabrovo, Bulgaria
    741.4×
  200. 199TrnavaTrnava Region, Slovakia
    741.4×

Top 200 of 1,270 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 28, 2023, smogrank.com/history/2023-01-28 (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.