SmogRank / History / August 18, 2025

Most polluted cities on August 18, 2025

2,474 cities ranked by their average PM2.5 over the day; the worst was Cuddalore, India, at 578.0 µg/m³. Each city's own local calendar day.

← Cuddalore 578.0 µg/m³ 500 µg/m³15 WHO 24-hour guideline
Every city ranked for August 18, 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
    500+38.5×
  2. 2PonferradaCastille and León, Spain
    24211.1×
  3. 3NagapattinamTamil Nadu, India
    2149.3×
  4. 4LeónCastille and León, Spain
    1907.4×
  5. 5CoyhaiqueAysén, Chile
    1897.3×
  6. 6ArāriaBihar, India
    1877.1×
  7. 7JhānsiUttar Pradesh, India
    1867.0×
  8. 8OsornoLos Lagos Region, Chile
    1796.4×
  9. 9MangaluruKarnataka, India
    1786.3×
  10. 10VillarricaAraucania, Chile
    1756.0×
  11. 11Medina del CampoCastille and León, Spain
    1644.9×
  12. 12Faisalabadlow-cost sensorsPunjab, Pakistan
    1614.7×
  13. 13KalyānMaharashtra, India
    1604.6×
  14. 14Puerto VarasLos Lagos Region, Chile
    1604.5×
  15. 15GummidipundiTamil Nadu, India
    1604.5×
  16. 16KadapaAndhra Pradesh, India
    1594.5×
  17. 17ManamaManama, Bahrain
    1584.3×
  18. 18Puerto MonttLos Lagos Region, Chile
    1574.3×
  19. 19DushanbeDushanbe, Tajikistan
    1564.2×
  20. 20CuranilahueBiobio, Chile
    1564.2×
  21. 21SamāstipurBihar, India
    1544.0×
  22. 22La UniónLos Ríos Region, Chile
    1533.9×
  23. 23ValdiviaLos Ríos Region, Chile
    1533.9×
  24. 24NacimientoBiobio, Chile
    1523.8×
  25. 25Sri GanganagarRajasthan, India
    1523.8×
  26. 26DhaulpurRajasthan, India
    1493.7×
  27. 27CuricóMaule Region, Chile
    1473.6×
  28. 28ChikmagalūrKarnataka, India
    1403.4×
  29. 29Puerto AysénAysén, Chile
    1333.2×
  30. 30Istanbullow-cost sensorsIstanbul, Turkey
    1323.2×
  31. 31Aranda de DueroCastille and León, Spain
    1303.2×
  32. 32Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1303.1×
  33. 33KigaliKigali, Rwanda
    1273.1×
  34. 34PalenciaCastille and León, Spain
    1243.0×
  35. 35Collado-VillalbaMadrid, Spain
    1212.9×
  36. 36NalbāriAssam, India
    1162.8×
  37. 37RengoO'Higgins Region, Chile
    1152.8×
  38. 38CoronelBiobio, Chile
    1152.7×
  39. 39FuenlabradaMadrid, Spain
    1142.7×
  40. 40Addis AbabaAddis Ababa, Ethiopia
    1132.7×
  41. 41Los ÁngelesBiobio, Chile
    1132.7×
  42. 42MothīhāriBihar, India
    1122.7×
  43. 43Multanlow-cost sensorsPunjab, Pakistan
    1122.7×
  44. 44Aya NagarDelhi, India
    1122.7×
  45. 45Greater NoidaUttar Pradesh, India
    1112.6×
  46. 46PāliRajasthan, India
    1102.6×
  47. 47SalamancaCastille and León, Spain
    1092.6×
  48. 48Lahorelow-cost sensorsPunjab, Pakistan
    1092.6×
  49. 49BhiwadiRajasthan, India
    1082.6×
  50. 50BuxarBihar, India
    1072.5×
  51. 50TemucoAraucania, Chile
    1072.5×
  52. 50HualquiBiobio, Chile
    1072.5×
  53. 53GobindgarhPunjab, India
    1072.5×
  54. 54RamanathapuramTamil Nadu, India
    1052.5×
  55. 55ManlleuCatalonia, Spain
    1042.5×
  56. 56RancaguaO'Higgins Region, Chile
    1042.4×
  57. 57TalcahuanoBiobio, Chile
    1012.4×
  58. 58Gujranwalalow-cost sensorsPunjab, Pakistan
    1012.4×
  59. 59GūduvāncheriTamil Nadu, India
    1002.3×
  60. 60VijayawadaAndhra Pradesh, India
    992.3×
  61. 61TalaganteSantiago Metropolitan, Chile
    992.3×
  62. 62LimaLima Province, Peru
    992.3×
  63. 63BathindaPunjab, India
    992.3×
  64. 64SantiagoSantiago Metropolitan, Chile
    992.3×
  65. 65ChūruRajasthan, India
    982.3×
  66. 66Sialkotlow-cost sensorsPunjab, Pakistan
    982.3×
  67. 67TonkRajasthan, India
    982.3×
  68. 67ChittoorAndhra Pradesh, India
    982.3×
  69. 69Bahawalpurlow-cost sensorsPunjab, Pakistan
    972.3×
  70. 70Karachilow-cost sensorsSindh, Pakistan
    972.3×
  71. 71KishanganjBihar, India
    972.3×
  72. 72UdaipurRajasthan, India
    972.2×
  73. 72JaipurRajasthan, India
    972.2×
  74. 72SingrauliMadhya Pradesh, India
    972.2×
  75. 75BawānaDelhi, India
    962.2×
  76. 75AmritsarPunjab, India
    962.2×
  77. 75AjmerRajasthan, India
    962.2×
  78. 78les EscaldesEscaldes-Engordany, Andorra
    962.2×
  79. 78MadridMadrid, Spain
    962.2×
  80. 80NagaonAssam, India
    962.2×
  81. 81LleidaCatalonia, Spain
    962.2×
  82. 82PatancheruTelangana, India
    952.2×
  83. 82MaiharMadhya Pradesh, India
    952.2×
  84. 84JhunjhunūnRajasthan, India
    942.2×
  85. 85DelhiDelhi, India
    932.1×
  86. 86ValdemoroMadrid, Spain
    932.1×
  87. 87NavalpattuTamil Nadu, India
    922.1×
  88. 88KannurKerala, India
    912.1×
  89. 89RājsamandRajasthan, India
    912.0×
  90. 89AnantapurAndhra Pradesh, India
    912.0×
  91. 91Rawalpindilow-cost sensorsPunjab, Pakistan
    912.0×
  92. 92LoniUttar Pradesh, India
    902.0×
  93. 92Puente AltoSantiago Metropolitan, Chile
    902.0×
  94. 94JakartaJakarta, Indonesia
    902.0×
  95. 95SangāreddiTelangana, India
    892.0×
  96. 96Ganghwa-gunIncheon, South Korea
    892.0×
  97. 97CauquenesMaule Region, Chile
    892.0×
  98. 98NarelaDelhi, India
    881.9×
  99. 99Lagoslow-cost sensorsLagos, Nigeria
    881.9×
  100. 99Santa LucíaCanary Islands, Spain
    881.9×
  101. 99San CarlosÑuble, Chile
    881.9×
  102. 102TalcaMaule Region, Chile
    881.9×
  103. 103RoparPunjab, India
    871.9×
  104. 104OotyTamil Nadu, India
    861.9×
  105. 104LinaresMaule Region, Chile
    861.9×
  106. 106MandideepMadhya Pradesh, India
    861.9×
  107. 107SatnaMadhya Pradesh, India
    861.9×
  108. 108MalegaonMaharashtra, India
    861.8×
  109. 108QuilpuéValparaiso, Chile
    861.8×
  110. 108ConcepciónBiobio, Chile
    861.8×
  111. 111Ashaimanlow-cost sensorsGreater Accra, Ghana
    851.8×
  112. 112Quettalow-cost sensorsBalochistan, Pakistan
    851.8×
  113. 112ValenciaValencia, Spain
    851.8×
  114. 114SevillaAndalusia, Spain
    851.8×
  115. 115ToméBiobio, Chile
    841.8×
  116. 115ChillánÑuble, Chile
    841.8×
  117. 115AlangadKerala, India
    841.8×
  118. 118SilcharAssam, India
    841.8×
  119. 118BegusaraiBihar, India
    841.8×
  120. 118Torrejón de ArdozMadrid, Spain
    841.8×
  121. 121ManzanaresCastille-La Mancha, Spain
    841.8×
  122. 122VelloreTamil Nadu, India
    841.8×
  123. 122CosladaMadrid, Spain
    841.8×
  124. 124PithampurMadhya Pradesh, India
    831.8×
  125. 125DādriUttar Pradesh, India
    831.7×
  126. 126SrinagarJammu and Kashmir, India
    821.7×
  127. 126NoidaUttar Pradesh, India
    821.7×
  128. 128SoriaCastille and León, Spain
    821.7×
  129. 129HyderabadTelangana, India
    821.7×
  130. 130TiruppurTamil Nadu, India
    821.7×
  131. 130ChiguayanteBiobio, Chile
    821.7×
  132. 132BikanerRajasthan, India
    811.7×
  133. 133VrindāvanUttar Pradesh, India
    811.7×
  134. 133SīkarRajasthan, India
    811.7×
  135. 135KatiharBihar, India
    811.7×
  136. 135ConcónValparaiso, Chile
    811.7×
  137. 137MuzaffarpurBihar, India
    811.7×
  138. 137AlcantarillaMurcia, Spain
    811.7×
  139. 139JalandharPunjab, India
    811.7×
  140. 139GwaliorMadhya Pradesh, India
    811.7×
  141. 139AlgeteMadrid, Spain
    811.7×
  142. 142JaénAndalusia, Spain
    801.7×
  143. 143Alcalá de HenaresMadrid, Spain
    801.7×
  144. 144Mollet del VallèsCatalonia, Spain
    801.6×
  145. 145JumillaMurcia, Spain
    801.6×
  146. 146Hondomachi-hondoKumamoto, Japan
    801.6×
  147. 147Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    791.6×
  148. 147MorādābādUttar Pradesh, India
    791.6×
  149. 147OurenseGalicia, Spain
    791.6×
  150. 147NaharlagunArunachal Pradesh, India
    791.6×
  151. 151BadlapurMaharashtra, India
    791.6×
  152. 152LorcaMurcia, Spain
    791.6×
  153. 152CandelariaCanary Islands, Spain
    791.6×
  154. 154NagpurMaharashtra, India
    791.6×
  155. 154SavannahGeorgia, United States
    791.6×
  156. 154San Pedro de la PazBiobio, Chile
    791.6×
  157. 157NajafgarhDelhi, India
    791.6×
  158. 157LudhianaPunjab, India
    791.6×
  159. 159SaguntoValencia, Spain
    781.6×
  160. 159CholulaPuebla, Mexico
    781.6×
  161. 161Islamabadlow-cost sensorsIslamabad, Pakistan
    781.6×
  162. 161BaddiHimachal Pradesh, India
    781.6×
  163. 163TumkūrKarnataka, India
    781.6×
  164. 164Sawai MadhopurRajasthan, India
    781.6×
  165. 164MurciaMurcia, Spain
    781.6×
  166. 166ThrissurKerala, India
    781.6×
  167. 167SaugorMadhya Pradesh, India
    771.6×
  168. 168RasapūdipalemAndhra Pradesh, India
    771.5×
  169. 169MinamataKumamoto, Japan
    771.5×
  170. 170HokotaIbaraki, Japan
    771.5×
  171. 170TuxtlaChiapas, Mexico
    771.5×
  172. 172Iloilolow-cost sensorsWestern Visayas, Philippines
    761.5×
  173. 173IncheonIncheon, South Korea
    761.5×
  174. 174CopiapóAtacama, Chile
    761.5×
  175. 175DewasMadhya Pradesh, India
    751.5×
  176. 175VijayapuraKarnataka, India
    751.5×
  177. 175Ōyanomachi-noboritateKumamoto, Japan
    751.5×
  178. 178SibsāgarAssam, India
    751.5×
  179. 178GironaCatalonia, Spain
    751.5×
  180. 180SaharsaBihar, India
    741.4×
  181. 180Barrio de PeralMurcia, Spain
    741.4×
  182. 182Alcalá de GuadairaAndalusia, Spain
    741.4×
  183. 182SarajevoFederation of B&H, Bosnia and Herzegovina
    741.4×
  184. 184MuzaffarnagarUttar Pradesh, India
    741.4×
  185. 185QuillotaValparaiso, Chile
    741.4×
  186. 186KanchipuramTamil Nadu, India
    741.4×
  187. 186BhilwaraRajasthan, India
    741.4×
  188. 186XonacatlánMéxico, Mexico
    741.4×
  189. 189HwadoGyeonggi-do, South Korea
    731.4×
  190. 190HwawŏnDaegu, South Korea
    731.4×
  191. 191JacksonTennessee, United States
    731.4×
  192. 192Temalow-cost sensorsGreater Accra, Ghana
    731.4×
  193. 193Molina de SeguraMurcia, Spain
    721.4×
  194. 193CórdobaAndalusia, Spain
    721.4×
  195. 195BhopalMadhya Pradesh, India
    721.4×
  196. 196RourkelaOdisha, India
    721.4×
  197. 196Dera Colliery TownshipOdisha, India
    721.4×
  198. 198GoseongGyeongsangnam-do, South Korea
    721.4×
  199. 199AurangābādBihar, India
    721.3×
  200. 199YangsanGyeongsangnam-do, South Korea
    721.3×

Top 200 of 2,474 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 18, 2025, smogrank.com/history/2025-08-18 (accessed 2 Oct 2026).

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