SmogRank / History / August 21, 2025

Most polluted cities on August 21, 2025

2,507 cities ranked by their average PM2.5 over the day; the worst was Nagapattinam, India, at 729.0 µg/m³. Each city's own local calendar day.

← Nagapattinam 729.0 µg/m³ 700 µg/m³15 WHO 24-hour guideline
Every city ranked for August 21, 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. 1NagapattinamTamil Nadu, India
    500+48.6×
  2. 2SingrauliMadhya Pradesh, India
    500+34.3×
  3. 3SaltilloCoahuila, Mexico
    500+24.4×
  4. 4PāliRajasthan, India
    29914.9×
  5. 5KigaliKigali, Rwanda
    1725.7×
  6. 6KoppalKarnataka, India
    1665.1×
  7. 7RānipetTamil Nadu, India
    1655.0×
  8. 8JhānsiUttar Pradesh, India
    1645.0×
  9. 9UnderaGujarat, India
    1604.5×
  10. 10Faisalabadlow-cost sensorsPunjab, Pakistan
    1564.2×
  11. 11PatancheruTelangana, India
    1533.9×
  12. 12Sri GanganagarRajasthan, India
    1483.6×
  13. 12DhaulpurRajasthan, India
    1483.6×
  14. 14RamanathapuramTamil Nadu, India
    1433.5×
  15. 15Aya NagarDelhi, India
    1403.4×
  16. 16DushanbeDushanbe, Tajikistan
    1373.3×
  17. 17SamāstipurBihar, India
    1343.3×
  18. 18AurangābādBihar, India
    1303.2×
  19. 19Multanlow-cost sensorsPunjab, Pakistan
    1283.1×
  20. 20Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1273.1×
  21. 21Bahawalpurlow-cost sensorsPunjab, Pakistan
    1253.0×
  22. 22KalaburagiKarnataka, India
    1222.9×
  23. 23LorcaMurcia, Spain
    1212.9×
  24. 24NalbāriAssam, India
    1192.9×
  25. 25DausaRajasthan, India
    1182.8×
  26. 26TirupparangunramTamil Nadu, India
    1142.7×
  27. 26RasapūdipalemAndhra Pradesh, India
    1142.7×
  28. 28Gujranwalalow-cost sensorsPunjab, Pakistan
    1142.7×
  29. 28ChittoorAndhra Pradesh, India
    1142.7×
  30. 30VijayawadaAndhra Pradesh, India
    1142.7×
  31. 31MothīhāriBihar, India
    1122.7×
  32. 32Lahorelow-cost sensorsPunjab, Pakistan
    1112.6×
  33. 32ManzanaresCastille-La Mancha, Spain
    1112.6×
  34. 34BhiwandiMaharashtra, India
    1092.6×
  35. 35GobindgarhPunjab, India
    1082.5×
  36. 36BathindaPunjab, India
    1062.5×
  37. 37Karachilow-cost sensorsSindh, Pakistan
    1052.5×
  38. 38BawānaDelhi, India
    1042.5×
  39. 39HāpurUttar Pradesh, India
    1042.4×
  40. 39GūduvāncheriTamil Nadu, India
    1042.4×
  41. 41JaénAndalusia, Spain
    1022.4×
  42. 42CoyhaiqueAysén, Chile
    1002.3×
  43. 43KadapaAndhra Pradesh, India
    992.3×
  44. 43BhiwadiRajasthan, India
    992.3×
  45. 45JakartaJakarta, Indonesia
    972.3×
  46. 46AlangadKerala, India
    972.2×
  47. 47MangaluruKarnataka, India
    962.2×
  48. 48RoparPunjab, India
    952.2×
  49. 48AmritsarPunjab, India
    952.2×
  50. 50OsornoLos Lagos Region, Chile
    952.2×
  51. 51Casa GrandeArizona, United States
    942.2×
  52. 52Sialkotlow-cost sensorsPunjab, Pakistan
    942.1×
  53. 53Greater NoidaUttar Pradesh, India
    922.1×
  54. 54BailénAndalusia, Spain
    922.1×
  55. 55Puerto VarasLos Lagos Region, Chile
    912.1×
  56. 55Puerto AysénAysén, Chile
    912.1×
  57. 57HājīpurBihar, India
    912.0×
  58. 57TuxtlaChiapas, Mexico
    912.0×
  59. 59SerilingampalleTelangana, India
    912.0×
  60. 60CaravacaMurcia, Spain
    902.0×
  61. 60Puerto MonttLos Lagos Region, Chile
    902.0×
  62. 62MuzaffarnagarUttar Pradesh, India
    902.0×
  63. 63GhāziābādUttar Pradesh, India
    902.0×
  64. 64Lagoslow-cost sensorsLagos, Nigeria
    902.0×
  65. 65ArāriaBihar, India
    892.0×
  66. 66San CarlosÑuble, Chile
    892.0×
  67. 67Rawalpindilow-cost sensorsPunjab, Pakistan
    881.9×
  68. 67KanpurUttar Pradesh, India
    881.9×
  69. 69GranadaAndalusia, Spain
    881.9×
  70. 70NarelaDelhi, India
    881.9×
  71. 71Istanbullow-cost sensorsIstanbul, Turkey
    871.9×
  72. 71KishanganjBihar, India
    871.9×
  73. 73AnantapurAndhra Pradesh, India
    871.9×
  74. 74Dera Colliery TownshipOdisha, India
    861.9×
  75. 75LoniUttar Pradesh, India
    861.9×
  76. 75KatiharBihar, India
    861.9×
  77. 77SatnaMadhya Pradesh, India
    861.9×
  78. 77DelhiDelhi, India
    861.9×
  79. 79Vientianelow-cost sensorsVientiane Prefecture, Laos
    851.8×
  80. 80LucknowUttar Pradesh, India
    851.8×
  81. 80CuricóMaule Region, Chile
    851.8×
  82. 82XonacatlánMéxico, Mexico
    851.8×
  83. 83JaipurRajasthan, India
    841.8×
  84. 83ChāpraBihar, India
    841.8×
  85. 85SrinagarJammu and Kashmir, India
    841.8×
  86. 86Quettalow-cost sensorsBalochistan, Pakistan
    831.8×
  87. 86LimaLima Province, Peru
    831.8×
  88. 88KannurKerala, India
    831.8×
  89. 88BaddiHimachal Pradesh, India
    831.8×
  90. 90La UniónLos Ríos Region, Chile
    831.7×
  91. 91BegusaraiBihar, India
    821.7×
  92. 92TirupatiAndhra Pradesh, India
    821.7×
  93. 93PatnaBihar, India
    821.7×
  94. 94ThrissurKerala, India
    821.7×
  95. 94AgraUttar Pradesh, India
    821.7×
  96. 96JalandharPunjab, India
    821.7×
  97. 97BadlapurMaharashtra, India
    811.7×
  98. 97PonferradaCastille and León, Spain
    811.7×
  99. 99San Francisco TlalcilalcalpanMéxico, Mexico
    811.7×
  100. 100JumillaMurcia, Spain
    811.7×
  101. 101Ashaimanlow-cost sensorsGreater Accra, Ghana
    811.7×
  102. 101CholulaPuebla, Mexico
    811.7×
  103. 103BaripādaOdisha, India
    801.7×
  104. 103UliyazhathuraKerala, India
    801.7×
  105. 105HyderabadTelangana, India
    801.6×
  106. 105CuddaloreTamil Nadu, India
    801.6×
  107. 107CuranilahueBiobio, Chile
    801.6×
  108. 108SilcharAssam, India
    791.6×
  109. 109TiruppurTamil Nadu, India
    791.6×
  110. 110Duque de CaxiasRio de Janeiro, Brazil
    791.6×
  111. 110NacimientoBiobio, Chile
    791.6×
  112. 110NoidaUttar Pradesh, India
    791.6×
  113. 113LudhianaPunjab, India
    781.6×
  114. 114CórdobaAndalusia, Spain
    781.6×
  115. 115Islamabadlow-cost sensorsIslamabad, Pakistan
    781.6×
  116. 116KalyānMaharashtra, India
    771.6×
  117. 117DādriUttar Pradesh, India
    771.5×
  118. 118AlcantarillaMurcia, Spain
    771.5×
  119. 118LinaresMaule Region, Chile
    771.5×
  120. 120MaiharMadhya Pradesh, India
    771.5×
  121. 121RengoO'Higgins Region, Chile
    771.5×
  122. 122FujinomiyaShizuoka, Japan
    761.5×
  123. 122ValdiviaLos Ríos Region, Chile
    761.5×
  124. 122TalaganteSantiago Metropolitan, Chile
    761.5×
  125. 122Wadgaon KolhatiMaharashtra, India
    761.5×
  126. 126ThiruvananthapuramKerala, India
    751.5×
  127. 126ŌtsukiYamanashi, Japan
    751.5×
  128. 126RancaguaO'Higgins Region, Chile
    751.5×
  129. 129Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    751.5×
  130. 130ShillongMeghalaya, India
    751.5×
  131. 130Barrio de PeralMurcia, Spain
    751.5×
  132. 132VrindāvanUttar Pradesh, India
    741.4×
  133. 132DurgapurWest Bengal, India
    741.4×
  134. 132TemucoAraucania, Chile
    741.4×
  135. 135MorādābādUttar Pradesh, India
    741.4×
  136. 136VapiGujarat, India
    741.4×
  137. 137TocopillaAntofagasta, Chile
    741.4×
  138. 138NajafgarhDelhi, India
    741.4×
  139. 139VijayapuraKarnataka, India
    741.4×
  140. 139NagahamaShiga, Japan
    741.4×
  141. 139Molina de SeguraMurcia, Spain
    741.4×
  142. 139AntofagastaAntofagasta, Chile
    741.4×
  143. 143CoronelBiobio, Chile
    731.4×
  144. 144RānīganjWest Bengal, India
    731.4×
  145. 144ChennaiTamil Nadu, India
    731.4×
  146. 146Temalow-cost sensorsGreater Accra, Ghana
    731.4×
  147. 147NandedMaharashtra, India
    731.4×
  148. 148Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    731.4×
  149. 148MurciaMurcia, Spain
    731.4×
  150. 150SarajevoFederation of B&H, Bosnia and Herzegovina
    721.4×
  151. 150PithampurMadhya Pradesh, India
    721.4×
  152. 152BulandshahrUttar Pradesh, India
    721.4×
  153. 153CatañoCataño, Puerto Rico
    721.4×
  154. 154GudalurTamil Nadu, India
    721.4×
  155. 155GotembaShizuoka, Japan
    721.3×
  156. 155FukuroiShizuoka, Japan
    721.3×
  157. 155ChillánÑuble, Chile
    721.3×
  158. 158HualquiBiobio, Chile
    711.3×
  159. 158KuwanaMie, Japan
    711.3×
  160. 160BagalkotKarnataka, India
    711.3×
  161. 160Naucalpan de JuárezMéxico, Mexico
    711.3×
  162. 160Puente AltoSantiago Metropolitan, Chile
    711.3×
  163. 160Los ÁngelesBiobio, Chile
    711.3×
  164. 160Ciudad General EscobedoNuevo León, Mexico
    711.3×
  165. 165SalemTamil Nadu, India
    711.3×
  166. 165Fukui-shiFukui, Japan
    711.3×
  167. 167RairangpurOdisha, India
    711.3×
  168. 167UozuToyama, Japan
    711.3×
  169. 167CartagenaMurcia, Spain
    711.3×
  170. 170TokiGifu, Japan
    711.3×
  171. 170ChigasakiKanagawa, Japan
    711.3×
  172. 170MóstolesMadrid, Spain
    711.3×
  173. 173GifuGifu, Japan
    701.3×
  174. 173AricaArica y Parinacota Region, Chile
    701.3×
  175. 173JodaOdisha, India
    701.3×
  176. 176SekimachiGifu, Japan
    701.3×
  177. 177CopiapóAtacama, Chile
    701.3×
  178. 178JhunjhunūnRajasthan, India
    701.3×
  179. 178MaizuruKyoto, Japan
    701.3×
  180. 178ZvolenBanská Bystrica Region, Slovakia
    701.3×
  181. 181PerunduraiTamil Nadu, India
    691.3×
  182. 181MiyazuKyoto, Japan
    691.3×
  183. 181IchinomiyaAichi, Japan
    691.3×
  184. 181SalamancaCastille and León, Spain
    691.3×
  185. 181TōkaiAichi, Japan
    691.3×
  186. 186KhurjaUttar Pradesh, India
    691.3×
  187. 187EisenGyeongsangbuk-do, South Korea
    691.3×
  188. 187Tottori-shiTottori, Japan
    691.3×
  189. 187VillarricaAraucania, Chile
    691.3×
  190. 190HanumāngarhRajasthan, India
    691.2×
  191. 190IwataShizuoka, Japan
    691.2×
  192. 190AshburtonCanterbury, New Zealand
    691.2×
  193. 193ConcónValparaiso, Chile
    691.2×
  194. 194YokkaichiMie, Japan
    681.2×
  195. 195ShivamoggaKarnataka, India
    681.2×
  196. 195PuducherryPuducherry, India
    681.2×
  197. 195NagoyaAichi, Japan
    681.2×
  198. 195KakamigaharaGifu, Japan
    681.2×
  199. 195HualpénBiobio, Chile
    681.2×
  200. 195InabeMie, Japan
    681.2×

Top 200 of 2,507 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 21, 2025, smogrank.com/history/2025-08-21 (accessed 2 Oct 2026).

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