SmogRank / History / August 23, 2025

Most polluted cities on August 23, 2025

2,559 cities ranked by their average PM2.5 over the day; the worst was Saltillo, Mexico, at 366.0 µg/m³. Each city's own local calendar day.

← Saltillo 366.0 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every city ranked for August 23, 2025, 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. 1SaltilloCoahuila, Mexico
    500+24.4×
  2. 2KalaburagiKarnataka, India
    27913.6×
  3. 3CuddaloreTamil Nadu, India
    2008.3×
  4. 4RānipetTamil Nadu, India
    1998.3×
  5. 5NacimientoBiobio, Chile
    1695.4×
  6. 6UnderaGujarat, India
    1665.2×
  7. 7Beitbridgelow-cost sensorsMatabeleland South Province, Zimbabwe
    1655.0×
  8. 8Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    1624.8×
  9. 9KigaliKigali, Rwanda
    1614.6×
  10. 10DhaulpurRajasthan, India
    1604.5×
  11. 11HualpénBiobio, Chile
    1574.3×
  12. 12Gujranwalalow-cost sensorsPunjab, Pakistan
    1554.1×
  13. 13Lahorelow-cost sensorsPunjab, Pakistan
    1533.9×
  14. 14Sialkotlow-cost sensorsPunjab, Pakistan
    1533.9×
  15. 15PatancheruTelangana, India
    1523.8×
  16. 16Faisalabadlow-cost sensorsPunjab, Pakistan
    1513.7×
  17. 17TrentoTrentino-Alto Adige, Italy
    1493.7×
  18. 18OsornoLos Lagos Region, Chile
    1483.6×
  19. 19Bihār SharīfBihar, India
    1473.6×
  20. 20DushanbeDushanbe, Tajikistan
    1423.5×
  21. 21LewistonIdaho, United States
    1413.4×
  22. 22AlwarRajasthan, India
    1403.4×
  23. 23Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1393.4×
  24. 24ValdiviaLos Ríos Region, Chile
    1363.3×
  25. 25Puerto VarasLos Lagos Region, Chile
    1333.2×
  26. 26La UniónLos Ríos Region, Chile
    1323.2×
  27. 27Rawalpindilow-cost sensorsPunjab, Pakistan
    1293.1×
  28. 28BawānaDelhi, India
    1233.0×
  29. 29TalcahuanoBiobio, Chile
    1233.0×
  30. 30TiruppurTamil Nadu, India
    1212.9×
  31. 31Puerto AysénAysén, Chile
    1192.9×
  32. 32VijayawadaAndhra Pradesh, India
    1182.8×
  33. 32GummidipundiTamil Nadu, India
    1182.8×
  34. 34SamāstipurBihar, India
    1172.8×
  35. 35KalyānMaharashtra, India
    1152.7×
  36. 36RasapūdipalemAndhra Pradesh, India
    1132.7×
  37. 37JakartaJakarta, Indonesia
    1132.7×
  38. 38MothīhāriBihar, India
    1122.7×
  39. 39GobindgarhPunjab, India
    1112.6×
  40. 40OurenseGalicia, Spain
    1112.6×
  41. 41Multanlow-cost sensorsPunjab, Pakistan
    1092.6×
  42. 41RengoO'Higgins Region, Chile
    1092.6×
  43. 41SerilingampalleTelangana, India
    1092.6×
  44. 44QuilpuéValparaiso, Chile
    1082.6×
  45. 45Puerto MonttLos Lagos Region, Chile
    1082.5×
  46. 46CuricóMaule Region, Chile
    1072.5×
  47. 47Ashaimanlow-cost sensorsGreater Accra, Ghana
    1062.5×
  48. 48RourkelaOdisha, India
    1052.5×
  49. 49KadapaAndhra Pradesh, India
    1042.5×
  50. 50BhiwadiRajasthan, India
    1032.4×
  51. 51Islamabadlow-cost sensorsIslamabad, Pakistan
    1022.4×
  52. 52ChittoorAndhra Pradesh, India
    1022.4×
  53. 53Dubailow-cost sensorsDubai, United Arab Emirates
    1012.4×
  54. 54CuranilahueBiobio, Chile
    1002.4×
  55. 55VillarricaAraucania, Chile
    972.3×
  56. 56NarelaDelhi, India
    962.2×
  57. 57NagaonAssam, India
    962.2×
  58. 58RancaguaO'Higgins Region, Chile
    962.2×
  59. 59Temalow-cost sensorsGreater Accra, Ghana
    962.2×
  60. 59CoronelBiobio, Chile
    962.2×
  61. 61SangāreddiTelangana, India
    962.2×
  62. 61TalaganteSantiago Metropolitan, Chile
    962.2×
  63. 63MangaluruKarnataka, India
    942.2×
  64. 64AmritsarPunjab, India
    942.1×
  65. 65AlangadKerala, India
    942.1×
  66. 66San CarlosÑuble, Chile
    932.1×
  67. 66AltamontOregon, United States
    932.1×
  68. 68GūduvāncheriTamil Nadu, India
    932.1×
  69. 69Hararelow-cost sensorsHarare, Zimbabwe
    922.1×
  70. 69PāliRajasthan, India
    922.1×
  71. 71RedmondOregon, United States
    922.1×
  72. 72Istanbullow-cost sensorsIstanbul, Turkey
    912.1×
  73. 73KannurKerala, India
    912.0×
  74. 74QuthbullapurTelangana, India
    912.0×
  75. 75NalbāriAssam, India
    902.0×
  76. 75ChāpraBihar, India
    902.0×
  77. 77San Pedro de la PazBiobio, Chile
    902.0×
  78. 78DelhiDelhi, India
    892.0×
  79. 78YamanashiYamanashi, Japan
    892.0×
  80. 80SaharsaBihar, India
    892.0×
  81. 81CoyhaiqueAysén, Chile
    881.9×
  82. 82GhāziābādUttar Pradesh, India
    881.9×
  83. 83ConcepciónBiobio, Chile
    871.9×
  84. 84Quettalow-cost sensorsBalochistan, Pakistan
    871.9×
  85. 85PullmanWashington, United States
    871.9×
  86. 86Changchunlow-cost sensorsJilin, China
    871.9×
  87. 86TemucoAraucania, Chile
    871.9×
  88. 88SatnaMadhya Pradesh, India
    861.9×
  89. 88CopiapóAtacama, Chile
    861.9×
  90. 90RamanathapuramTamil Nadu, India
    861.9×
  91. 90BendOregon, United States
    861.9×
  92. 92AurangābādBihar, India
    851.8×
  93. 92Lagoslow-cost sensorsLagos, Nigeria
    851.8×
  94. 92QuinteroValparaiso, Chile
    851.8×
  95. 95BegusaraiBihar, India
    851.8×
  96. 96ThrissurKerala, India
    851.8×
  97. 96QuillotaValparaiso, Chile
    851.8×
  98. 98HualquiBiobio, Chile
    841.8×
  99. 99NoidaUttar Pradesh, India
    841.8×
  100. 100Sri GanganagarRajasthan, India
    831.8×
  101. 100DādriUttar Pradesh, India
    831.8×
  102. 100UliyazhathuraKerala, India
    831.8×
  103. 103ShenyangLiaoning, China
    831.8×
  104. 103ConcónValparaiso, Chile
    831.8×
  105. 105SalemTamil Nadu, India
    831.7×
  106. 106TalcaMaule Region, Chile
    821.7×
  107. 107CauquenesMaule Region, Chile
    821.7×
  108. 108CoimbatoreTamil Nadu, India
    821.7×
  109. 109Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    821.7×
  110. 109KhurjaUttar Pradesh, India
    821.7×
  111. 111HyderabadTelangana, India
    811.7×
  112. 112Bahawalpurlow-cost sensorsPunjab, Pakistan
    811.7×
  113. 112VrindāvanUttar Pradesh, India
    811.7×
  114. 114TocopillaAntofagasta, Chile
    811.7×
  115. 115Accralow-cost sensorsGreater Accra, Ghana
    811.7×
  116. 116MoscowIdaho, United States
    801.7×
  117. 117MalegaonMaharashtra, India
    801.6×
  118. 118NajafgarhDelhi, India
    801.6×
  119. 118Greater NoidaUttar Pradesh, India
    801.6×
  120. 120MuzaffarnagarUttar Pradesh, India
    791.6×
  121. 121LinaresMaule Region, Chile
    791.6×
  122. 122Karachilow-cost sensorsSindh, Pakistan
    791.6×
  123. 123Medina Estateslow-cost sensorsGreater Accra, Ghana
    791.6×
  124. 124SzegedCsongrád, Hungary
    781.6×
  125. 125ŌtsukiYamanashi, Japan
    781.6×
  126. 125BaddiHimachal Pradesh, India
    781.6×
  127. 127Iloilolow-cost sensorsWestern Visayas, Philippines
    781.6×
  128. 128SantiagoSantiago Metropolitan, Chile
    771.5×
  129. 129ManzanaresCastille-La Mancha, Spain
    771.5×
  130. 130UlsanUlsan, South Korea
    771.5×
  131. 130CoquimboCoquimbo Region, Chile
    771.5×
  132. 132Los ÁngelesBiobio, Chile
    771.5×
  133. 133KhannaPunjab, India
    761.5×
  134. 134ChillánÑuble, Chile
    761.5×
  135. 134AkishimaTokyo, Japan
    761.5×
  136. 136OotyTamil Nadu, India
    761.5×
  137. 136BadlapurMaharashtra, India
    761.5×
  138. 136ŌmeTokyo, Japan
    761.5×
  139. 139HachiōjiTokyo, Japan
    761.5×
  140. 140ShibukawaGunma, Japan
    751.5×
  141. 141VijayapuraKarnataka, India
    751.5×
  142. 142PerunduraiTamil Nadu, India
    751.5×
  143. 143LudhianaPunjab, India
    751.5×
  144. 144ChennaiTamil Nadu, India
    741.4×
  145. 144KiryūGunma, Japan
    741.4×
  146. 144JaénAndalusia, Spain
    741.4×
  147. 147PithampurMadhya Pradesh, India
    741.4×
  148. 148TirupparangunramTamil Nadu, India
    741.4×
  149. 148KatiharBihar, India
    741.4×
  150. 150SilcharAssam, India
    731.4×
  151. 150KanumaTochigi, Japan
    731.4×
  152. 150BakersfieldCalifornia, United States
    731.4×
  153. 153IwakiFukushima, Japan
    731.4×
  154. 153RangioraCanterbury, New Zealand
    731.4×
  155. 155KasamaIbaraki, Japan
    731.4×
  156. 155XonacatlánMéxico, Mexico
    731.4×
  157. 157RoparPunjab, India
    731.4×
  158. 157LucknowUttar Pradesh, India
    731.4×
  159. 157YaitaTochigi, Japan
    731.4×
  160. 160BhiwandiMaharashtra, India
    721.4×
  161. 161CorcoranCalifornia, United States
    721.4×
  162. 162AgraUttar Pradesh, India
    721.3×
  163. 162NakanojōGunma, Japan
    721.3×
  164. 162AiharaKanagawa, Japan
    721.3×
  165. 165AshburtonCanterbury, New Zealand
    711.3×
  166. 165IrumaSaitama, Japan
    711.3×
  167. 167ĀsansolWest Bengal, India
    711.3×
  168. 167ImaichiTochigi, Japan
    711.3×
  169. 169LorcaMurcia, Spain
    711.3×
  170. 169TsuchiuraIbaraki, Japan
    711.3×
  171. 171RānīganjWest Bengal, India
    711.3×
  172. 171NandedMaharashtra, India
    711.3×
  173. 171BailénAndalusia, Spain
    711.3×
  174. 174JaipurRajasthan, India
    711.3×
  175. 174MinamirinkanKanagawa, Japan
    711.3×
  176. 176PanvelMaharashtra, India
    711.3×
  177. 176ToméBiobio, Chile
    711.3×
  178. 176Puente AltoSantiago Metropolitan, Chile
    711.3×
  179. 179SanoTochigi, Japan
    701.3×
  180. 179FuenlabradaMadrid, Spain
    701.3×
  181. 179CholulaPuebla, Mexico
    701.3×
  182. 182ShrīrāmpurWest Bengal, India
    701.3×
  183. 182TucsonArizona, United States
    701.3×
  184. 184VelloreTamil Nadu, India
    701.3×
  185. 184MorādābādUttar Pradesh, India
    701.3×
  186. 184DurgapurWest Bengal, India
    701.3×
  187. 184BulandshahrUttar Pradesh, India
    701.3×
  188. 184MaderaCalifornia, United States
    701.3×
  189. 189Dera MāndiDelhi, India
    701.3×
  190. 189OyamaTochigi, Japan
    701.3×
  191. 189ChiguayanteBiobio, Chile
    701.3×
  192. 192ThiruvananthapuramKerala, India
    691.3×
  193. 192BagalkotKarnataka, India
    691.3×
  194. 194AntofagastaAntofagasta, Chile
    691.3×
  195. 195Hyderabadlow-cost sensorsSindh, Pakistan
    691.2×
  196. 195MenumaSaitama, Japan
    691.2×
  197. 195PortervilleCalifornia, United States
    691.2×
  198. 198WŏnjuGangwon-do, South Korea
    691.2×
  199. 198NumataGunma, Japan
    691.2×
  200. 200Wan ChaiWan Chai, Hong Kong
    691.2×

Top 200 of 2,559 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, August 23, 2025, smogrank.com/history/2025-08-23 (accessed 2 Oct 2026).

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