SmogRank / History / August 17, 2025

Most polluted cities on August 17, 2025

2,544 cities ranked by their average PM2.5 over the day; the worst was Ponferrada, Spain, at 194.0 µg/m³. Each city's own local calendar day.

← Ponferrada 194.0 µg/m³ 150 µg/m³15 WHO 24-hour guideline
Every city ranked for August 17, 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. 1PonferradaCastille and León, Spain
    26912.9×
  2. 2LeónCastille and León, Spain
    2018.4×
  3. 3OsornoLos Lagos Region, Chile
    1867.1×
  4. 4CoyhaiqueAysén, Chile
    1867.0×
  5. 5Puerto VarasLos Lagos Region, Chile
    1856.9×
  6. 6GummidipundiTamil Nadu, India
    1796.4×
  7. 7VillarricaAraucania, Chile
    1745.9×
  8. 8KigaliKigali, Rwanda
    1655.1×
  9. 9DhaulpurRajasthan, India
    1644.9×
  10. 10JhānsiUttar Pradesh, India
    1624.7×
  11. 11SamāstipurBihar, India
    1614.7×
  12. 12Los ÁngelesBiobio, Chile
    1614.7×
  13. 13ArāriaBihar, India
    1604.6×
  14. 14Faisalabadlow-cost sensorsPunjab, Pakistan
    1604.6×
  15. 15KalyānMaharashtra, India
    1554.1×
  16. 16ValdiviaLos Ríos Region, Chile
    1544.0×
  17. 17HualpénBiobio, Chile
    1544.0×
  18. 18Santa LucíaCanary Islands, Spain
    1533.9×
  19. 19NacimientoBiobio, Chile
    1533.9×
  20. 20La UniónLos Ríos Region, Chile
    1533.9×
  21. 21Sri GanganagarRajasthan, India
    1523.8×
  22. 22TemucoAraucania, Chile
    1523.8×
  23. 23Lahorelow-cost sensorsPunjab, Pakistan
    1463.6×
  24. 24LinaresMaule Region, Chile
    1443.5×
  25. 25DushanbeDushanbe, Tajikistan
    1433.5×
  26. 26ManamaManama, Bahrain
    1403.4×
  27. 27Istanbullow-cost sensorsIstanbul, Turkey
    1383.4×
  28. 28CuranilahueBiobio, Chile
    1373.4×
  29. 29Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1353.3×
  30. 30Multanlow-cost sensorsPunjab, Pakistan
    1343.3×
  31. 31SaharsaBihar, India
    1333.2×
  32. 32PatancheruTelangana, India
    1313.2×
  33. 33BawānaDelhi, India
    1273.1×
  34. 34Puerto MonttLos Lagos Region, Chile
    1263.0×
  35. 35Gujranwalalow-cost sensorsPunjab, Pakistan
    1253.0×
  36. 36NalbāriAssam, India
    1243.0×
  37. 37PāliRajasthan, India
    1212.9×
  38. 37NarelaDelhi, India
    1212.9×
  39. 37Iloilolow-cost sensorsWestern Visayas, Philippines
    1212.9×
  40. 40GobindgarhPunjab, India
    1202.9×
  41. 41LoniUttar Pradesh, India
    1182.8×
  42. 42Puerto AysénAysén, Chile
    1182.8×
  43. 43San CarlosÑuble, Chile
    1162.8×
  44. 44ChittoorAndhra Pradesh, India
    1142.7×
  45. 45OurenseGalicia, Spain
    1122.7×
  46. 46Rawalpindilow-cost sensorsPunjab, Pakistan
    1122.7×
  47. 47JakartaJakarta, Indonesia
    1122.7×
  48. 48BhiwadiRajasthan, India
    1112.6×
  49. 49TalcahuanoBiobio, Chile
    1112.6×
  50. 50LimaLima Province, Peru
    1082.6×
  51. 50Aya NagarDelhi, India
    1082.6×
  52. 52Sialkotlow-cost sensorsPunjab, Pakistan
    1082.5×
  53. 53CandelariaCanary Islands, Spain
    1062.5×
  54. 54BuxarBihar, India
    1062.5×
  55. 54BathindaPunjab, India
    1062.5×
  56. 56Greater NoidaUttar Pradesh, India
    1052.5×
  57. 57HualquiBiobio, Chile
    1052.5×
  58. 58Medina del CampoCastille and León, Spain
    1052.5×
  59. 59MorādābādUttar Pradesh, India
    1042.4×
  60. 60SalamancaCastille and León, Spain
    1032.4×
  61. 61CuricóMaule Region, Chile
    1032.4×
  62. 62RangioraCanterbury, New Zealand
    1022.4×
  63. 63VijayawadaAndhra Pradesh, India
    1022.4×
  64. 64JumillaMurcia, Spain
    1012.4×
  65. 64RengoO'Higgins Region, Chile
    1012.4×
  66. 66RancaguaO'Higgins Region, Chile
    1012.4×
  67. 67DelhiDelhi, India
    1012.4×
  68. 68Hyderabadlow-cost sensorsSindh, Pakistan
    992.3×
  69. 69KadapaAndhra Pradesh, India
    992.3×
  70. 69ChillánÑuble, Chile
    992.3×
  71. 71AnantapurAndhra Pradesh, India
    992.3×
  72. 72CoronelBiobio, Chile
    972.3×
  73. 73NagaonAssam, India
    972.3×
  74. 74UdaipurRajasthan, India
    962.2×
  75. 75BaripādaOdisha, India
    962.2×
  76. 76les EscaldesEscaldes-Engordany, Andorra
    952.2×
  77. 77ManlleuCatalonia, Spain
    942.2×
  78. 78TalcaMaule Region, Chile
    942.2×
  79. 78SantiagoSantiago Metropolitan, Chile
    942.2×
  80. 80GūduvāncheriTamil Nadu, India
    942.1×
  81. 81RājsamandRajasthan, India
    932.1×
  82. 82Islamabadlow-cost sensorsIslamabad, Pakistan
    932.1×
  83. 83Bahawalpurlow-cost sensorsPunjab, Pakistan
    932.1×
  84. 84Puente AltoSantiago Metropolitan, Chile
    922.1×
  85. 85DādriUttar Pradesh, India
    922.1×
  86. 85LleidaCatalonia, Spain
    922.1×
  87. 87KannurKerala, India
    922.1×
  88. 88SoriaCastille and León, Spain
    922.1×
  89. 89NoidaUttar Pradesh, India
    912.1×
  90. 90LudhianaPunjab, India
    912.0×
  91. 91JalandharPunjab, India
    902.0×
  92. 92MangaluruKarnataka, India
    902.0×
  93. 93KhannaPunjab, India
    892.0×
  94. 94SangāreddiTelangana, India
    892.0×
  95. 95BaddiHimachal Pradesh, India
    892.0×
  96. 96JaipurRajasthan, India
    892.0×
  97. 96San Pedro de la PazBiobio, Chile
    892.0×
  98. 98AmritsarPunjab, India
    881.9×
  99. 99ToméBiobio, Chile
    881.9×
  100. 99ConcepciónBiobio, Chile
    881.9×
  101. 101BurgosCastille and León, Spain
    871.9×
  102. 102ZaragozaAragon, Spain
    861.9×
  103. 102PalenciaCastille and León, Spain
    861.9×
  104. 104SrinagarJammu and Kashmir, India
    861.8×
  105. 104HyderabadTelangana, India
    861.8×
  106. 104HanumāngarhRajasthan, India
    861.8×
  107. 104ChūruRajasthan, India
    861.8×
  108. 108AjmerRajasthan, India
    851.8×
  109. 109AvilésAsturias, Spain
    851.8×
  110. 110NajafgarhDelhi, India
    851.8×
  111. 110CholulaPuebla, Mexico
    851.8×
  112. 112SatnaMadhya Pradesh, India
    841.8×
  113. 113TonkRajasthan, India
    841.8×
  114. 114KatiharBihar, India
    841.8×
  115. 115Addis AbabaAddis Ababa, Ethiopia
    831.8×
  116. 115Aranda de DueroCastille and León, Spain
    831.8×
  117. 117Quettalow-cost sensorsBalochistan, Pakistan
    831.8×
  118. 118KishanganjBihar, India
    831.7×
  119. 118KanchipuramTamil Nadu, India
    831.7×
  120. 118Ashaimanlow-cost sensorsGreater Accra, Ghana
    831.7×
  121. 121RamanathapuramTamil Nadu, India
    831.7×
  122. 122TuxtlaChiapas, Mexico
    821.7×
  123. 122PithampurMadhya Pradesh, India
    821.7×
  124. 122San Francisco De BorjaLima region, Peru
    821.7×
  125. 125JhunjhunūnRajasthan, India
    821.7×
  126. 125ValdemoroMadrid, Spain
    821.7×
  127. 127BegusaraiBihar, India
    821.7×
  128. 128Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    821.7×
  129. 129QuilpuéValparaiso, Chile
    821.7×
  130. 130Sawai MadhopurRajasthan, India
    811.7×
  131. 130MuzaffarpurBihar, India
    811.7×
  132. 130Mollet del VallèsCatalonia, Spain
    811.7×
  133. 133Karachilow-cost sensorsSindh, Pakistan
    811.7×
  134. 133TalaganteSantiago Metropolitan, Chile
    811.7×
  135. 133BayonneNew Jersey, United States
    811.7×
  136. 136VrindāvanUttar Pradesh, India
    811.7×
  137. 136SendaiKagoshima, Japan
    811.7×
  138. 138AlangadKerala, India
    811.7×
  139. 139PurniaBihar, India
    801.6×
  140. 139DhuleMaharashtra, India
    801.6×
  141. 139Lagoslow-cost sensorsLagos, Nigeria
    801.6×
  142. 142MungerBihar, India
    801.6×
  143. 143MuzaffarnagarUttar Pradesh, India
    791.6×
  144. 143ValenciaValencia, Spain
    791.6×
  145. 145BulandshahrUttar Pradesh, India
    791.6×
  146. 146MaiharMadhya Pradesh, India
    791.6×
  147. 146GranadaAndalusia, Spain
    791.6×
  148. 148ThrissurKerala, India
    781.6×
  149. 148ChiguayanteBiobio, Chile
    781.6×
  150. 148Lexingtonlow-cost sensorsMassachusetts, United States
    781.6×
  151. 151LogroñoLa Rioja, Spain
    781.6×
  152. 152Miranda de EbroCastille and León, Spain
    771.6×
  153. 153BikanerRajasthan, India
    771.5×
  154. 153GironaCatalonia, Spain
    771.5×
  155. 155GarcíaNuevo León, Mexico
    771.5×
  156. 155Santa CatarinaNuevo León, Mexico
    771.5×
  157. 157ToulouseOccitanie, France
    771.5×
  158. 157GyőrGyőr-Moson-Sopron, Hungary
    771.5×
  159. 157TudelaNavarre, Spain
    771.5×
  160. 160GwaliorMadhya Pradesh, India
    771.5×
  161. 161DurgapurWest Bengal, India
    771.5×
  162. 161MonterreyNuevo León, Mexico
    771.5×
  163. 163RatlāmMadhya Pradesh, India
    761.5×
  164. 163San Salvador TizatlalliMéxico, Mexico
    761.5×
  165. 165BhopalMadhya Pradesh, India
    761.5×
  166. 165MadridMadrid, Spain
    761.5×
  167. 167GijónAsturias, Spain
    761.5×
  168. 168ManzanaresCastille-La Mancha, Spain
    751.5×
  169. 168CauquenesMaule Region, Chile
    751.5×
  170. 170MitrovicëMitrovica, Kosovo
    751.5×
  171. 170SibsāgarAssam, India
    751.5×
  172. 170LucknowUttar Pradesh, India
    751.5×
  173. 173BhilwaraRajasthan, India
    751.5×
  174. 174VijayapuraKarnataka, India
    751.5×
  175. 174BhiwandiMaharashtra, India
    751.5×
  176. 174QuillotaValparaiso, Chile
    751.5×
  177. 177BānswāraRajasthan, India
    751.5×
  178. 177CallaoCallao, Peru
    751.5×
  179. 179PerpignanOccitanie, France
    741.4×
  180. 180Quezon Citylow-cost sensorsNational Capital Region, Philippines
    741.4×
  181. 180JaénAndalusia, Spain
    741.4×
  182. 182RānīganjWest Bengal, India
    741.4×
  183. 182Temalow-cost sensorsGreater Accra, Ghana
    741.4×
  184. 182XonacatlánMéxico, Mexico
    741.4×
  185. 182Ciudad Benito JuárezNuevo León, Mexico
    741.4×
  186. 186ChennaiTamil Nadu, India
    741.4×
  187. 186Winterthurlow-cost sensorsZurich, Switzerland
    741.4×
  188. 188BarcelonaCatalonia, Spain
    741.4×
  189. 189SaugorMadhya Pradesh, India
    741.4×
  190. 190Dera MāndiDelhi, India
    731.4×
  191. 191RānipetTamil Nadu, India
    731.4×
  192. 191KotaRajasthan, India
    731.4×
  193. 193MeerutUttar Pradesh, India
    731.4×
  194. 193Collado-VillalbaMadrid, Spain
    731.4×
  195. 195BadlapurMaharashtra, India
    731.4×
  196. 196RasapūdipalemAndhra Pradesh, India
    721.4×
  197. 196ParbhaniMaharashtra, India
    721.4×
  198. 196CastresOccitanie, France
    721.4×
  199. 199Pasadenalow-cost sensorsCalifornia, United States
    721.4×
  200. 200ChittorgarhRajasthan, India
    721.3×

Top 200 of 2,544 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 17, 2025, smogrank.com/history/2025-08-17 (accessed 2 Oct 2026).

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