SmogRank / History / July 25, 2025

Most polluted cities on July 25, 2025

2,456 cities ranked by their average PM2.5 over the day; the worst was Cuddalore, India, at 86.5 µg/m³. Each city's own local calendar day.

Bad-air episodes during July 25, 2025. All episodes.

← Cuddalore 86.5 µg/m³ 80 µg/m³15 WHO 24-hour guideline
Every city ranked for July 25, 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. 1CuddaloreTamil Nadu, India
    1735.8×
  2. 2KigaliKigali, Rwanda
    1685.3×
  3. 3CoyhaiqueAysén, Chile
    1675.2×
  4. 4OotyTamil Nadu, India
    1634.9×
  5. 5RengoO'Higgins Region, Chile
    1614.7×
  6. 6Greater NoidaUttar Pradesh, India
    1564.1×
  7. 7UnderaGujarat, India
    1554.1×
  8. 8DuluthMinnesota, United States
    1544.0×
  9. 9ManamaManama, Bahrain
    1533.9×
  10. 10BaddiHimachal Pradesh, India
    1523.8×
  11. 11Faisalabadlow-cost sensorsPunjab, Pakistan
    1523.8×
  12. 11JakartaJakarta, Indonesia
    1523.8×
  13. 13BulandshahrUttar Pradesh, India
    1523.8×
  14. 14Gujranwalalow-cost sensorsPunjab, Pakistan
    1513.7×
  15. 15Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1503.7×
  16. 16LoniUttar Pradesh, India
    1493.7×
  17. 17DādriUttar Pradesh, India
    1483.6×
  18. 18TirupparangunramTamil Nadu, India
    1463.6×
  19. 19DushanbeDushanbe, Tajikistan
    1453.6×
  20. 20Lahorelow-cost sensorsPunjab, Pakistan
    1453.6×
  21. 21SantiagoSantiago Metropolitan, Chile
    1453.6×
  22. 22GhāziābādUttar Pradesh, India
    1443.5×
  23. 23TalaganteSantiago Metropolitan, Chile
    1443.5×
  24. 24MinneapolisMinnesota, United States
    1353.3×
  25. 25Trois-RivièresQuebec, Canada
    1333.2×
  26. 26ShawiniganQuebec, Canada
    1323.2×
  27. 27Saint PaulMinnesota, United States
    1313.2×
  28. 28BlaineMinnesota, United States
    1303.2×
  29. 29NarelaDelhi, India
    1283.1×
  30. 30Sorel-TracyQuebec, Canada
    1273.1×
  31. 31Sialkotlow-cost sensorsPunjab, Pakistan
    1243.0×
  32. 32Multanlow-cost sensorsPunjab, Pakistan
    1243.0×
  33. 32OsornoLos Lagos Region, Chile
    1243.0×
  34. 34Eau ClaireWisconsin, United States
    1233.0×
  35. 35RancaguaO'Higgins Region, Chile
    1222.9×
  36. 36PāliRajasthan, India
    1212.9×
  37. 37NoidaUttar Pradesh, India
    1202.9×
  38. 38DrummondvilleQuebec, Canada
    1162.8×
  39. 39HāpurUttar Pradesh, India
    1142.7×
  40. 39Puente AltoSantiago Metropolitan, Chile
    1142.7×
  41. 41BawānaDelhi, India
    1142.7×
  42. 42VijayawadaAndhra Pradesh, India
    1132.7×
  43. 43MorādābādUttar Pradesh, India
    1122.7×
  44. 44VelloreTamil Nadu, India
    1112.6×
  45. 45BurnsvilleMinnesota, United States
    1102.6×
  46. 46Saint MichaelMinnesota, United States
    1102.6×
  47. 47SamāstipurBihar, India
    1102.6×
  48. 47MarquetteMichigan, United States
    1102.6×
  49. 47PithampurMadhya Pradesh, India
    1102.6×
  50. 50DelhiDelhi, India
    1082.6×
  51. 51Saint CloudMinnesota, United States
    1082.6×
  52. 52Green BayWisconsin, United States
    1062.5×
  53. 53GunsanJeollabuk-do, South Korea
    1062.5×
  54. 54BānswāraRajasthan, India
    1062.5×
  55. 55MuzaffarnagarUttar Pradesh, India
    1052.5×
  56. 56KotaRajasthan, India
    1052.5×
  57. 57GranbyQuebec, Canada
    1052.5×
  58. 58L'Ancienne-LoretteQuebec, Canada
    1052.5×
  59. 59SherbrookeQuebec, Canada
    1022.4×
  60. 60BārānRajasthan, India
    1012.4×
  61. 61NalbāriAssam, India
    1012.4×
  62. 62TonkRajasthan, India
    1002.4×
  63. 63ValdiviaLos Ríos Region, Chile
    992.3×
  64. 64Changchunlow-cost sensorsJilin, China
    982.3×
  65. 65CuricóMaule Region, Chile
    982.3×
  66. 66Dubailow-cost sensorsDubai, United Arab Emirates
    982.3×
  67. 66Sault Ste. MarieOntario, Canada
    982.3×
  68. 68MeerutUttar Pradesh, India
    972.3×
  69. 68ChittoorAndhra Pradesh, India
    972.3×
  70. 70RasapūdipalemAndhra Pradesh, India
    972.2×
  71. 71BuanJeollabuk-do, South Korea
    962.2×
  72. 72QuébecQuebec, Canada
    962.2×
  73. 73Temalow-cost sensorsGreater Accra, Ghana
    962.2×
  74. 74RangioraCanterbury, New Zealand
    952.2×
  75. 74QuthbullapurTelangana, India
    952.2×
  76. 76QuilpuéValparaiso, Chile
    952.2×
  77. 77AshburtonCanterbury, New Zealand
    952.2×
  78. 78NajafgarhDelhi, India
    942.2×
  79. 78HualpénBiobio, Chile
    942.2×
  80. 80JaipurRajasthan, India
    942.1×
  81. 81VaranasiUttar Pradesh, India
    942.1×
  82. 81Apple ValleyMinnesota, United States
    942.1×
  83. 83Greater SudburyOntario, Canada
    942.1×
  84. 84Islamabadlow-cost sensorsIslamabad, Pakistan
    932.1×
  85. 84Bahawalpurlow-cost sensorsPunjab, Pakistan
    932.1×
  86. 86SaugorMadhya Pradesh, India
    932.1×
  87. 86JeongeupJeollabuk-do, South Korea
    932.1×
  88. 88Rawalpindilow-cost sensorsPunjab, Pakistan
    932.1×
  89. 89LinaresMaule Region, Chile
    922.1×
  90. 90ConcónValparaiso, Chile
    922.1×
  91. 91Wan ChaiWan Chai, Hong Kong
    922.1×
  92. 92KimjeJeollabuk-do, South Korea
    912.0×
  93. 93AnantapurAndhra Pradesh, India
    912.0×
  94. 94UdaipurRajasthan, India
    902.0×
  95. 95Wadgaon KolhatiMaharashtra, India
    902.0×
  96. 96MontréalQuebec, Canada
    902.0×
  97. 97TaupoWaikato Region, New Zealand
    902.0×
  98. 98BhiwadiRajasthan, India
    902.0×
  99. 99San CarlosÑuble, Chile
    902.0×
  100. 100LucknowUttar Pradesh, India
    892.0×
  101. 101GobindgarhPunjab, India
    892.0×
  102. 102San Francisco De BorjaLima region, Peru
    892.0×
  103. 103TimaruCanterbury, New Zealand
    892.0×
  104. 103NacimientoBiobio, Chile
    892.0×
  105. 105La SerenaCoquimbo Region, Chile
    892.0×
  106. 106Santa Anita - Los FicusLima region, Peru
    881.9×
  107. 107LudhianaPunjab, India
    881.9×
  108. 107DorvalQuebec, Canada
    881.9×
  109. 109TocopillaAntofagasta, Chile
    881.9×
  110. 110DausaRajasthan, India
    881.9×
  111. 111HyderabadTelangana, India
    871.9×
  112. 111AjmerRajasthan, India
    871.9×
  113. 113Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    871.9×
  114. 113ShakopeeMinnesota, United States
    871.9×
  115. 115VillarricaAraucania, Chile
    861.9×
  116. 115ChillánÑuble, Chile
    861.9×
  117. 117Rivière-des-Prairies–Pointe-aux-TremblesQuebec, Canada
    861.9×
  118. 118CallaoCallao, Peru
    861.9×
  119. 119Addis AbabaAddis Ababa, Ethiopia
    861.8×
  120. 119QuillotaValparaiso, Chile
    861.8×
  121. 119AppletonWisconsin, United States
    861.8×
  122. 122Karachilow-cost sensorsSindh, Pakistan
    851.8×
  123. 122CopiapóAtacama, Chile
    851.8×
  124. 124PyeongtaekGyeonggi-do, South Korea
    851.8×
  125. 124AlangadKerala, India
    851.8×
  126. 126RishīkeshUttarakhand, India
    851.8×
  127. 126Medina Estateslow-cost sensorsGreater Accra, Ghana
    851.8×
  128. 126Accralow-cost sensorsGreater Accra, Ghana
    851.8×
  129. 129Istanbullow-cost sensorsIstanbul, Turkey
    841.8×
  130. 129Puerto MonttLos Lagos Region, Chile
    841.8×
  131. 131BrossardQuebec, Canada
    841.8×
  132. 132ChandigarhChandigarh, India
    841.8×
  133. 132YeonggwangJeollanam-do, South Korea
    841.8×
  134. 134IncheonIncheon, South Korea
    841.8×
  135. 135Puerto AysénAysén, Chile
    841.8×
  136. 135Aya NagarDelhi, India
    841.8×
  137. 137JalandharPunjab, India
    831.8×
  138. 138SilcharAssam, India
    831.8×
  139. 138CuranilahueBiobio, Chile
    831.8×
  140. 140CoquimboCoquimbo Region, Chile
    831.8×
  141. 141KannurKerala, India
    831.7×
  142. 142TiruchirappalliTamil Nadu, India
    821.7×
  143. 143Ganghwa-gunIncheon, South Korea
    821.7×
  144. 144TirupatiAndhra Pradesh, India
    821.7×
  145. 145SpekeEngland, United Kingdom
    811.7×
  146. 145San Francisco TlalcilalcalpanMéxico, Mexico
    811.7×
  147. 147NāgaurRajasthan, India
    811.7×
  148. 147Hwaseong-siGyeonggi-do, South Korea
    811.7×
  149. 149LimaLima Province, Peru
    801.7×
  150. 150MahādMaharashtra, India
    801.6×
  151. 150GorakhpurUttar Pradesh, India
    801.6×
  152. 152IksanJeollabuk-do, South Korea
    801.6×
  153. 153ThrissurKerala, India
    801.6×
  154. 153GūduvāncheriTamil Nadu, India
    801.6×
  155. 153TuxtlaChiapas, Mexico
    801.6×
  156. 156Puerto VarasLos Lagos Region, Chile
    791.6×
  157. 156MillcreekUtah, United States
    791.6×
  158. 158Ansan-siGyeonggi-do, South Korea
    791.6×
  159. 159XonacatlánMéxico, Mexico
    791.6×
  160. 160QuinteroValparaiso, Chile
    791.6×
  161. 161KhannaPunjab, India
    781.6×
  162. 161Los ÁngelesBiobio, Chile
    781.6×
  163. 163KhurjaUttar Pradesh, India
    781.6×
  164. 164Gimpo-siGyeonggi-do, South Korea
    781.6×
  165. 165JhānsiUttar Pradesh, India
    781.6×
  166. 165Stoke-on-TrentEngland, United Kingdom
    781.6×
  167. 167NajuJeollanam-do, South Korea
    771.6×
  168. 167CauquenesMaule Region, Chile
    771.6×
  169. 167SingrauliMadhya Pradesh, India
    771.6×
  170. 170MalegaonMaharashtra, India
    771.5×
  171. 170Manchesterlow-cost sensorsEngland, United Kingdom
    771.5×
  172. 170NeelankaraiTamil Nadu, India
    771.5×
  173. 173CoronelBiobio, Chile
    771.5×
  174. 173AricaArica y Parinacota Region, Chile
    771.5×
  175. 175SrinagarJammu and Kashmir, India
    771.5×
  176. 175OsanGyeonggi-do, South Korea
    771.5×
  177. 175SuperiorWisconsin, United States
    771.5×
  178. 178MokpoJeollanam-do, South Korea
    761.5×
  179. 179SeoulSeoul, South Korea
    761.5×
  180. 179Oconomowoclow-cost sensorsWisconsin, United States
    761.5×
  181. 179Nepeanlow-cost sensorsOntario, Canada
    761.5×
  182. 179SejongSejong-si, South Korea
    761.5×
  183. 183TemucoAraucania, Chile
    761.5×
  184. 183TalcaMaule Region, Chile
    761.5×
  185. 183HualquiBiobio, Chile
    761.5×
  186. 183SinanJeollanam-do, South Korea
    761.5×
  187. 187Icheon-siGyeonggi-do, South Korea
    761.5×
  188. 188MuanJeollanam-do, South Korea
    761.5×
  189. 188La UniónLos Ríos Region, Chile
    761.5×
  190. 190JhālāwārRajasthan, India
    751.5×
  191. 190DurgapurWest Bengal, India
    751.5×
  192. 190ĀsansolWest Bengal, India
    751.5×
  193. 193VijayapuraKarnataka, India
    751.5×
  194. 194ChennaiTamil Nadu, India
    751.5×
  195. 194DhuleMaharashtra, India
    751.5×
  196. 194BhopalMadhya Pradesh, India
    751.5×
  197. 194SuwonGyeonggi-do, South Korea
    751.5×
  198. 198Cheadle HulmeEngland, United Kingdom
    751.5×
  199. 198Rouyn-NorandaQuebec, Canada
    751.5×
  200. 198VapiGujarat, India
    751.5×

Top 200 of 2,456 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, July 25, 2025, smogrank.com/history/2025-07-25 (accessed 2 Oct 2026).

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