SmogRank / History / May 25, 2023

Most polluted cities on May 25, 2023

1,520 cities ranked by their average PM2.5 over the day; the worst was Baghdad, Iraq, at 132.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during May 25, 2023. All episodes.

← Baghdad 132.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for May 25, 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. 1BaghdadBaghdad, Iraq
    2078.8×
  2. 2Dhakalow-cost sensorsDhaka Division, Bangladesh
    1594.5×
  3. 3Ga-RankuwaNorth West, South Africa
    1584.4×
  4. 4NacimientoBiobio, Chile
    1584.4×
  5. 5CoyhaiqueAysén, Chile
    1564.2×
  6. 6DushanbeDushanbe, Tajikistan
    1554.0×
  7. 7JakartaJakarta, Indonesia
    1533.9×
  8. 8HyderabadTelangana, India
    1503.7×
  9. 9RengoO'Higgins Region, Chile
    1503.7×
  10. 10CuricóMaule Region, Chile
    1463.6×
  11. 11ThembisaGauteng, South Africa
    1443.5×
  12. 12Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1333.2×
  13. 13LinaresMaule Region, Chile
    1323.2×
  14. 14SantiagoSantiago Metropolitan, Chile
    1313.2×
  15. 15RancaguaO'Higgins Region, Chile
    1293.1×
  16. 16JohannesburgGauteng, South Africa
    1283.1×
  17. 17DurbanKwaZulu-Natal, South Africa
    1273.1×
  18. 18TalaganteSantiago Metropolitan, Chile
    1263.0×
  19. 19BeijingBeijing, China
    1233.0×
  20. 20CauquenesMaule Region, Chile
    1202.9×
  21. 21CelayaGuanajuato, Mexico
    1182.8×
  22. 22SalamancaGuanajuato, Mexico
    1172.8×
  23. 23Wan ChaiWan Chai, Hong Kong
    1122.7×
  24. 24Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1112.6×
  25. 25IrapuatoGuanajuato, Mexico
    1102.6×
  26. 26OsornoLos Lagos Region, Chile
    1082.6×
  27. 27TalcaMaule Region, Chile
    1072.5×
  28. 28CoronelBiobio, Chile
    1062.5×
  29. 29HualquiBiobio, Chile
    1062.5×
  30. 30Puente AltoSantiago Metropolitan, Chile
    1042.4×
  31. 31BloemfonteinFree State, South Africa
    1032.4×
  32. 32Fort McMurrayAlberta, Canada
    1032.4×
  33. 33BritsNorth West, South Africa
    1022.4×
  34. 34QuinteroValparaiso, Chile
    1012.4×
  35. 35SasolburgFree State, South Africa
    1002.3×
  36. 36LublinLublin, Poland
    992.3×
  37. 37RabinalBaja Verapaz, Guatemala
    992.3×
  38. 38EdmontonAlberta, Canada
    982.3×
  39. 39CuranilahueBiobio, Chile
    982.3×
  40. 40GuangzhouGuangdong, China
    982.3×
  41. 40Guatemala CityGuatemala, Guatemala
    982.3×
  42. 42San CarlosÑuble, Chile
    972.3×
  43. 43ChillánÑuble, Chile
    952.2×
  44. 44La UniónLos Ríos Region, Chile
    952.2×
  45. 45Puerto VarasLos Lagos Region, Chile
    952.2×
  46. 46MielecSubcarpathia, Poland
    942.2×
  47. 47Puerto AysénAysén, Chile
    942.1×
  48. 48DębicaSubcarpathia, Poland
    942.1×
  49. 48AntananarivoAnalamanga, Madagascar
    942.1×
  50. 50QuillotaValparaiso, Chile
    932.1×
  51. 51Kampalalow-cost sensorsCentral Region, Uganda
    932.1×
  52. 52KolkataWest Bengal, India
    922.1×
  53. 53Bang NaBangkok, Thailand
    922.1×
  54. 54Addis AbabaAddis Ababa, Ethiopia
    912.0×
  55. 54Puerto MonttLos Lagos Region, Chile
    912.0×
  56. 54Khlong Sam WaBangkok, Thailand
    912.0×
  57. 57Mong KokYau Tsim Mong District, Hong Kong
    902.0×
  58. 58Khan Na YaoBangkok, Thailand
    892.0×
  59. 59KielceŚwiętokrzyskie, Poland
    892.0×
  60. 60Saphan SungBangkok, Thailand
    881.9×
  61. 61BakuBaki, Azerbaijan
    881.9×
  62. 61Ban Samae DamBangkok, Thailand
    881.9×
  63. 63BrakpanGauteng, South Africa
    881.9×
  64. 63ChennaiTamil Nadu, India
    881.9×
  65. 65AstanaAstana, Kazakhstan
    881.9×
  66. 66ChiguayanteBiobio, Chile
    881.9×
  67. 66San Pedro de la PazBiobio, Chile
    881.9×
  68. 68VictoriaCentral and Western, Hong Kong
    861.9×
  69. 69VereenigingGauteng, South Africa
    861.8×
  70. 69Bang KapiBangkok, Thailand
    861.8×
  71. 71KrakówLesser Poland, Poland
    851.8×
  72. 72Nong KhaemBangkok, Thailand
    851.8×
  73. 73TalcahuanoBiobio, Chile
    851.8×
  74. 74GrajewoPodlasie, Poland
    841.8×
  75. 75León de los AldamaGuanajuato, Mexico
    841.8×
  76. 76Novi PazarCentral Serbia, Serbia
    831.8×
  77. 77CoquimboCoquimbo Region, Chile
    831.8×
  78. 78Bueng KumBangkok, Thailand
    831.7×
  79. 78Lak SiBangkok, Thailand
    831.7×
  80. 80LegionowoMazovia, Poland
    821.7×
  81. 81Jastrzębie ZdrójSilesia, Poland
    821.7×
  82. 81HernandoMississippi, United States
    821.7×
  83. 83HanoiHanoi, Vietnam
    821.7×
  84. 84BirminghamAlabama, United States
    821.7×
  85. 85BiałystokPodlasie, Poland
    811.7×
  86. 86BangkokBangkok, Thailand
    811.7×
  87. 87Sau Mau PingKwun Tong District, Hong Kong
    801.7×
  88. 88St. AlbertAlberta, Canada
    801.6×
  89. 89Red DeerAlberta, Canada
    801.6×
  90. 90WarsawMazovia, Poland
    791.6×
  91. 90RzeszówSubcarpathia, Poland
    791.6×
  92. 90Ecatepec de MorelosMéxico, Mexico
    791.6×
  93. 90Lat KrabangBangkok, Thailand
    791.6×
  94. 94ParadiseCalifornia, United States
    791.6×
  95. 95ShenyangLiaoning, China
    791.6×
  96. 95Mexico CityMexico City, Mexico
    791.6×
  97. 97PesaroThe Marches, Italy
    781.6×
  98. 97SpringdaleArkansas, United States
    781.6×
  99. 99SiedlceMazovia, Poland
    781.6×
  100. 100CopiapóAtacama, Chile
    781.6×
  101. 101East RidgeTennessee, United States
    781.6×
  102. 102Silao de la VictoriaGuanajuato, Mexico
    781.6×
  103. 103Alto HospicioTarapacá, Chile
    771.5×
  104. 103AbasoloGuanajuato, Mexico
    771.5×
  105. 105GuanajuatoGuanajuato, Mexico
    771.5×
  106. 106Sai MaiBangkok, Thailand
    771.5×
  107. 107ConcónValparaiso, Chile
    771.5×
  108. 108ŁukówLublin, Poland
    761.5×
  109. 108Viña del MarValparaiso, Chile
    761.5×
  110. 108TexarkanaTexas, United States
    761.5×
  111. 111TemucoAraucania, Chile
    761.5×
  112. 111AntofagastaAntofagasta, Chile
    761.5×
  113. 111San Miguel de AllendeGuanajuato, Mexico
    761.5×
  114. 114Tai PoTai Po, Hong Kong
    751.5×
  115. 115PruszkówMazovia, Poland
    751.5×
  116. 115JarosławSubcarpathia, Poland
    751.5×
  117. 117AshgabatAshgabat, Turkmenistan
    751.5×
  118. 117AthensAttica, Greece
    751.5×
  119. 117Sherwood ParkAlberta, Canada
    751.5×
  120. 120FanlingNorth District, Hong Kong
    751.5×
  121. 121BelmopanCayo District, Belize
    751.5×
  122. 122Ban Khlong PrawetBangkok, Thailand
    741.4×
  123. 122RacibórzSilesia, Poland
    741.4×
  124. 124StarachowiceŚwiętokrzyskie, Poland
    741.4×
  125. 124DelhiDelhi, India
    741.4×
  126. 126ChattanoogaTennessee, United States
    741.4×
  127. 127ConcepciónBiobio, Chile
    741.4×
  128. 128HueytownAlabama, United States
    731.4×
  129. 129Tuen MunTuen Mun, Hong Kong
    731.4×
  130. 129San Luis de la PazGuanajuato, Mexico
    731.4×
  131. 129HattiesburgMississippi, United States
    731.4×
  132. 132OtwockMazovia, Poland
    731.4×
  133. 132AirdrieAlberta, Canada
    731.4×
  134. 134PułtuskMazovia, Poland
    721.4×
  135. 134JacksonMississippi, United States
    721.4×
  136. 134MaryvilleTennessee, United States
    721.4×
  137. 137WawerMazovia, Poland
    721.4×
  138. 137Los ÁngelesBiobio, Chile
    721.4×
  139. 139Nong ChokBangkok, Thailand
    721.4×
  140. 139Kędzierzyn-KoźleOpole Voivodeship, Poland
    721.4×
  141. 139TrussvilleAlabama, United States
    721.4×
  142. 142KnoxvilleTennessee, United States
    721.3×
  143. 143Bielsko-BialaSilesia, Poland
    711.3×
  144. 144PrešovPrešov Region, Slovakia
    711.3×
  145. 144KragujevacCentral Serbia, Serbia
    711.3×
  146. 144San Tung Chung HangIslands, Hong Kong
    711.3×
  147. 147ŻyrardówMazovia, Poland
    711.3×
  148. 147YangonYangon, Myanmar
    711.3×
  149. 149Islamabadlow-cost sensorsIslamabad, Pakistan
    701.3×
  150. 149ModugnoApulia, Italy
    701.3×
  151. 149GadsdenAlabama, United States
    701.3×
  152. 149Little RockArkansas, United States
    701.3×
  153. 153KošiceKošice Region, Slovakia
    701.3×
  154. 153RadomMazovia, Poland
    701.3×
  155. 153KrosnoSubcarpathia, Poland
    701.3×
  156. 153SmederevoCentral Serbia, Serbia
    701.3×
  157. 153TocopillaAntofagasta, Chile
    701.3×
  158. 153Ferry PassFlorida, United States
    701.3×
  159. 153Corpus ChristiTexas, United States
    701.3×
  160. 160Spišská Nová VesKošice Region, Slovakia
    701.3×
  161. 160Sham Shui PoSham Shui Po District, Hong Kong
    701.3×
  162. 160LotaBiobio, Chile
    701.3×
  163. 160AricaArica y Parinacota Region, Chile
    701.3×
  164. 164MiddelburgMpumalanga, South Africa
    701.3×
  165. 164Karachilow-cost sensorsSindh, Pakistan
    701.3×
  166. 166JeddahMecca Region, Saudi Arabia
    691.3×
  167. 166CalgaryAlberta, Canada
    691.3×
  168. 168Tha BoNong Khai, Thailand
    691.3×
  169. 169West MemphisArkansas, United States
    691.3×
  170. 169GainesvilleGeorgia, United States
    691.3×
  171. 171HuntsvilleAlabama, United States
    691.2×
  172. 172PrzemyślSubcarpathia, Poland
    691.2×
  173. 172Kwai ChungKwai Tsing District, Hong Kong
    691.2×
  174. 174KamloopsBritish Columbia, Canada
    681.2×
  175. 175HumennéPrešov Region, Slovakia
    681.2×
  176. 175Tsuen WanTsuen Wan, Hong Kong
    681.2×
  177. 177HavířovMoravian-Silesian Region, Czechia
    681.2×
  178. 177Frýdek-MístekMoravian-Silesian Region, Czechia
    681.2×
  179. 179NišCentral Serbia, Serbia
    681.2×
  180. 179Falconara MarittimaThe Marches, Italy
    681.2×
  181. 179SpartanburgSouth Carolina, United States
    681.2×
  182. 182GulfportMississippi, United States
    671.2×
  183. 182HobbsNew Mexico, United States
    671.2×
  184. 184AugustówPodlasie, Poland
    671.2×
  185. 185VilniusVilnius, Lithuania
    671.2×
  186. 185MitrovicëMitrovica, Kosovo
    671.2×
  187. 185Baton RougeLouisiana, United States
    671.2×
  188. 188TarnówLesser Poland, Poland
    671.2×
  189. 188PłockMazovia, Poland
    671.2×
  190. 188CalamaAntofagasta, Chile
    671.2×
  191. 191PascagoulaMississippi, United States
    661.2×
  192. 191GreenvilleSouth Carolina, United States
    661.2×
  193. 191Grande PrairieAlberta, Canada
    661.2×
  194. 194ZamośćLublin, Poland
    661.2×
  195. 194KatowiceSilesia, Poland
    661.2×
  196. 194KingsportTennessee, United States
    661.2×
  197. 197ReginaSaskatchewan, Canada
    661.1×
  198. 198Lahorelow-cost sensorsPunjab, Pakistan
    661.1×
  199. 198São PauloSão Paulo, Brazil
    661.1×
  200. 198SulphurLouisiana, United States
    661.1×

Top 200 of 1,520 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, May 25, 2023, smogrank.com/history/2023-05-25 (accessed 2 Oct 2026).

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