SmogRank / History / August 6, 2025

Most polluted cities on August 6, 2025

2,535 cities ranked by their average PM2.5 over the day; the worst was Ooty, India, at 918.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during August 6, 2025. All episodes.

← Ooty 918.0 µg/m³ 900 µg/m³15 WHO 24-hour guideline
Every city ranked for August 6, 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. 1OotyTamil Nadu, India
    500+61.2×
  2. 2Ceglie MessapicaApulia, Italy
    500+28.1×
  3. 3Sri GanganagarRajasthan, India
    1957.9×
  4. 4KigaliKigali, Rwanda
    1826.6×
  5. 5OsornoLos Lagos Region, Chile
    1756.0×
  6. 6NacimientoBiobio, Chile
    1715.6×
  7. 7LinaresMaule Region, Chile
    1685.3×
  8. 8ManamaManama, Bahrain
    1644.9×
  9. 9NeelankaraiTamil Nadu, India
    1594.5×
  10. 10CuddaloreTamil Nadu, India
    1594.5×
  11. 11San CarlosÑuble, Chile
    1584.4×
  12. 12JodaOdisha, India
    1574.2×
  13. 13JhānsiUttar Pradesh, India
    1564.1×
  14. 14AngulOdisha, India
    1554.1×
  15. 15Puerto VarasLos Lagos Region, Chile
    1533.9×
  16. 16GobindgarhPunjab, India
    1513.7×
  17. 17BathindaPunjab, India
    1493.7×
  18. 18Bihār SharīfBihar, India
    1483.6×
  19. 19Iloilolow-cost sensorsWestern Visayas, Philippines
    1403.4×
  20. 19ChillánÑuble, Chile
    1403.4×
  21. 21ChāndaMaharashtra, India
    1403.4×
  22. 22GummidipundiTamil Nadu, India
    1373.3×
  23. 23Puerto AysénAysén, Chile
    1353.3×
  24. 24Los ÁngelesBiobio, Chile
    1343.3×
  25. 25CuricóMaule Region, Chile
    1333.2×
  26. 26CoyhaiqueAysén, Chile
    1333.2×
  27. 27TalcaMaule Region, Chile
    1313.2×
  28. 28SangāreddiTelangana, India
    1303.1×
  29. 29SuperiorWisconsin, United States
    1293.1×
  30. 29BhiwadiRajasthan, India
    1293.1×
  31. 31MuzaffarnagarUttar Pradesh, India
    1283.1×
  32. 32VillarricaAraucania, Chile
    1233.0×
  33. 33TalaganteSantiago Metropolitan, Chile
    1222.9×
  34. 33Puerto MonttLos Lagos Region, Chile
    1222.9×
  35. 35SaugorMadhya Pradesh, India
    1222.9×
  36. 36Prince AlbertSaskatchewan, Canada
    1202.9×
  37. 37CoronelBiobio, Chile
    1202.9×
  38. 37Greater NoidaUttar Pradesh, India
    1202.9×
  39. 39ValdiviaLos Ríos Region, Chile
    1172.8×
  40. 40ChittoorAndhra Pradesh, India
    1162.8×
  41. 41RengoO'Higgins Region, Chile
    1152.8×
  42. 42BuffaloNew York, United States
    1142.7×
  43. 43MarquetteMichigan, United States
    1142.7×
  44. 44RochesterNew York, United States
    1142.7×
  45. 45HājīpurBihar, India
    1132.7×
  46. 46Addis AbabaAddis Ababa, Ethiopia
    1132.7×
  47. 47Oconomowoclow-cost sensorsWisconsin, United States
    1132.7×
  48. 48MothīhāriBihar, India
    1122.7×
  49. 49SantiagoSantiago Metropolitan, Chile
    1122.7×
  50. 50DushanbeDushanbe, Tajikistan
    1112.6×
  51. 51La UniónLos Ríos Region, Chile
    1102.6×
  52. 52ChāpraBihar, India
    1092.6×
  53. 52BānswāraRajasthan, India
    1092.6×
  54. 52TemucoAraucania, Chile
    1092.6×
  55. 55ScrantonPennsylvania, United States
    1082.6×
  56. 56VijayawadaAndhra Pradesh, India
    1082.6×
  57. 57RamanathapuramTamil Nadu, India
    1072.5×
  58. 58BuxarBihar, India
    1072.5×
  59. 58BelagaviKarnataka, India
    1072.5×
  60. 60LondonOntario, Canada
    1072.5×
  61. 60MandideepMadhya Pradesh, India
    1072.5×
  62. 62PanvelMaharashtra, India
    1062.5×
  63. 62KalyānMaharashtra, India
    1062.5×
  64. 64Franklin ParkIllinois, United States
    1052.5×
  65. 65CuranilahueBiobio, Chile
    1052.5×
  66. 66QuilpuéValparaiso, Chile
    1042.5×
  67. 67St. CatharinesOntario, Canada
    1042.5×
  68. 68BarbilOdisha, India
    1032.4×
  69. 69SarniaOntario, Canada
    1032.4×
  70. 70AmravatiMaharashtra, India
    1022.4×
  71. 71WindsorColorado, United States
    1022.4×
  72. 72Temalow-cost sensorsGreater Accra, Ghana
    1012.4×
  73. 73HyderabadTelangana, India
    1012.4×
  74. 73JakartaJakarta, Indonesia
    1012.4×
  75. 75TonkRajasthan, India
    1002.4×
  76. 75PithampurMadhya Pradesh, India
    1002.4×
  77. 77Port HuronMichigan, United States
    1002.4×
  78. 77Sault Ste. MarieOntario, Canada
    1002.4×
  79. 79Faisalabadlow-cost sensorsPunjab, Pakistan
    1002.3×
  80. 79TiruchirappalliTamil Nadu, India
    1002.3×
  81. 81ChicagoIllinois, United States
    992.3×
  82. 82HualpénBiobio, Chile
    992.3×
  83. 83BulandshahrUttar Pradesh, India
    992.3×
  84. 84JaipurRajasthan, India
    982.3×
  85. 84HualquiBiobio, Chile
    982.3×
  86. 84St. ThomasOntario, Canada
    982.3×
  87. 87KanchipuramTamil Nadu, India
    982.3×
  88. 88NandedMaharashtra, India
    982.3×
  89. 88DādriUttar Pradesh, India
    982.3×
  90. 90San Francisco De BorjaLima region, Peru
    982.3×
  91. 91RancaguaO'Higgins Region, Chile
    982.3×
  92. 91NewmarketOntario, Canada
    982.3×
  93. 93DuluthMinnesota, United States
    972.3×
  94. 94RourkelaOdisha, India
    972.3×
  95. 95PittsfieldMassachusetts, United States
    972.3×
  96. 96TirupparangunramTamil Nadu, India
    972.2×
  97. 97State CollegePennsylvania, United States
    972.2×
  98. 98PatancheruTelangana, India
    962.2×
  99. 98NagaonAssam, India
    962.2×
  100. 98KannurKerala, India
    962.2×
  101. 101BridgeviewIllinois, United States
    962.2×
  102. 102Elmwood ParkIllinois, United States
    962.2×
  103. 103PāliRajasthan, India
    962.2×
  104. 103BhāgalpurBihar, India
    962.2×
  105. 103Des PlainesIllinois, United States
    962.2×
  106. 106MeerutUttar Pradesh, India
    962.2×
  107. 107KadapaAndhra Pradesh, India
    952.2×
  108. 108BrookfieldIllinois, United States
    952.2×
  109. 108CarlislePennsylvania, United States
    952.2×
  110. 110NaharlagunArunachal Pradesh, India
    952.2×
  111. 111QuinteroValparaiso, Chile
    952.2×
  112. 111AmīnpurTelangana, India
    952.2×
  113. 113DoltonIllinois, United States
    942.2×
  114. 113LebanonPennsylvania, United States
    942.2×
  115. 115Dera Colliery TownshipOdisha, India
    942.1×
  116. 116Puente AltoSantiago Metropolitan, Chile
    942.1×
  117. 116AlbanyNew York, United States
    942.1×
  118. 116SingrauliMadhya Pradesh, India
    942.1×
  119. 119Pasadenalow-cost sensorsCalifornia, United States
    942.1×
  120. 120BawānaDelhi, India
    932.1×
  121. 120ArāriaBihar, India
    932.1×
  122. 120Quezon Citylow-cost sensorsNational Capital Region, Philippines
    932.1×
  123. 123RasapūdipalemAndhra Pradesh, India
    932.1×
  124. 124HāpurUttar Pradesh, India
    932.1×
  125. 124ChittorgarhRajasthan, India
    932.1×
  126. 126Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    932.1×
  127. 126BrantfordOntario, Canada
    932.1×
  128. 128SyracuseNew York, United States
    922.1×
  129. 129GhāziābādUttar Pradesh, India
    922.1×
  130. 130NagpurMaharashtra, India
    922.1×
  131. 131NalbāriAssam, India
    922.1×
  132. 132MalegaonMaharashtra, India
    912.1×
  133. 132VapiGujarat, India
    912.1×
  134. 132SerilingampalleTelangana, India
    912.1×
  135. 135Gujranwalalow-cost sensorsPunjab, Pakistan
    912.0×
  136. 135LudhianaPunjab, India
    912.0×
  137. 137ConcónValparaiso, Chile
    912.0×
  138. 137WaukeshaWisconsin, United States
    912.0×
  139. 139HarrisburgPennsylvania, United States
    912.0×
  140. 139LongmontColorado, United States
    912.0×
  141. 141GayaBihar, India
    912.0×
  142. 142BhiwandiMaharashtra, India
    902.0×
  143. 142AppletonWisconsin, United States
    902.0×
  144. 144HammondIndiana, United States
    902.0×
  145. 145PratāpgarhRajasthan, India
    902.0×
  146. 146AurangābādBihar, India
    902.0×
  147. 146Green BayWisconsin, United States
    902.0×
  148. 148JalandharPunjab, India
    902.0×
  149. 149ChiguayanteBiobio, Chile
    892.0×
  150. 149ElginIllinois, United States
    892.0×
  151. 151Multanlow-cost sensorsPunjab, Pakistan
    892.0×
  152. 151La Crescenta-Montroselow-cost sensorsCalifornia, United States
    892.0×
  153. 153MorādābādUttar Pradesh, India
    892.0×
  154. 154Viña del MarValparaiso, Chile
    892.0×
  155. 154Oak LawnIllinois, United States
    892.0×
  156. 154Santa Anita - Los FicusLima region, Peru
    892.0×
  157. 157YorkPennsylvania, United States
    881.9×
  158. 157KitchenerOntario, Canada
    881.9×
  159. 159NoidaUttar Pradesh, India
    881.9×
  160. 160ThāneMaharashtra, India
    881.9×
  161. 160TaupoWaikato Region, New Zealand
    881.9×
  162. 160TalcahuanoBiobio, Chile
    881.9×
  163. 163EriePennsylvania, United States
    881.9×
  164. 164CaryIllinois, United States
    881.9×
  165. 164AllistonOntario, Canada
    881.9×
  166. 164San Salvador TizatlalliMéxico, Mexico
    881.9×
  167. 167MilwaukeeWisconsin, United States
    881.9×
  168. 167TorontoOntario, Canada
    881.9×
  169. 169PuneMaharashtra, India
    871.9×
  170. 169RockfordIllinois, United States
    871.9×
  171. 169LancasterPennsylvania, United States
    871.9×
  172. 172DhuleMaharashtra, India
    871.9×
  173. 173SouthfieldMichigan, United States
    871.9×
  174. 173WindsorOntario, Canada
    871.9×
  175. 175QuillotaValparaiso, Chile
    861.9×
  176. 175CallaoCallao, Peru
    861.9×
  177. 177AntofagastaAntofagasta, Chile
    861.9×
  178. 178ThrissurKerala, India
    851.8×
  179. 178HamiltonOntario, Canada
    851.8×
  180. 180Accralow-cost sensorsGreater Accra, Ghana
    851.8×
  181. 181NarelaDelhi, India
    851.8×
  182. 181DelhiDelhi, India
    851.8×
  183. 183SaharsaBihar, India
    851.8×
  184. 183DurgapurWest Bengal, India
    851.8×
  185. 183DausaRajasthan, India
    851.8×
  186. 183ConcepciónBiobio, Chile
    851.8×
  187. 183MadisonWisconsin, United States
    851.8×
  188. 183BramptonOntario, Canada
    851.8×
  189. 183GuelphOntario, Canada
    851.8×
  190. 190OurenseGalicia, Spain
    851.8×
  191. 191Istanbullow-cost sensorsIstanbul, Turkey
    841.8×
  192. 191Dunedinlow-cost sensorsOtago, New Zealand
    841.8×
  193. 191Fort CollinsColorado, United States
    841.8×
  194. 194Sialkotlow-cost sensorsPunjab, Pakistan
    841.8×
  195. 194Dera MāndiDelhi, India
    841.8×
  196. 194NapervilleIllinois, United States
    841.8×
  197. 197UdaipurRajasthan, India
    841.8×
  198. 197MiltonOntario, Canada
    841.8×
  199. 199AuroraIllinois, United States
    841.8×
  200. 199SteubenvilleOhio, United States
    841.8×

Top 200 of 2,535 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

Not covered: the government monitoring networks of China and Turkey, which publish no terms that let us reuse their readings. Most cities there are missing from this board, not clean. Why.

Use this board

SmogRank, most polluted cities, PM2.5, August 6, 2025, smogrank.com/history/2025-08-06 (accessed 3 Oct 2026).

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