SmogRank / History / July 21, 2025

Most polluted cities on July 21, 2025

2,479 cities ranked by their average PM2.5 over the day; the worst was Amritsar, India, at 210.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during July 21, 2025. All episodes.

← Amritsar 210.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for July 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. 1AmritsarPunjab, India
    28514.0×
  2. 2Prince AlbertSaskatchewan, Canada
    27913.6×
  3. 3NacimientoBiobio, Chile
    1967.9×
  4. 4LinaresMaule Region, Chile
    1856.9×
  5. 5BhelaiChhattisgarh, India
    1786.3×
  6. 6CoyhaiqueAysén, Chile
    1776.2×
  7. 7GobindgarhPunjab, India
    1756.0×
  8. 8SaskatoonSaskatchewan, Canada
    1725.7×
  9. 9DhaulpurRajasthan, India
    1715.6×
  10. 9CuricóMaule Region, Chile
    1715.6×
  11. 11KigaliKigali, Rwanda
    1705.5×
  12. 12UnderaGujarat, India
    1644.9×
  13. 13RengoO'Higgins Region, Chile
    1624.8×
  14. 14CoronelBiobio, Chile
    1624.7×
  15. 15PāliRajasthan, India
    1614.7×
  16. 16RancaguaO'Higgins Region, Chile
    1614.6×
  17. 17Sri GanganagarRajasthan, India
    1604.5×
  18. 18CuranilahueBiobio, Chile
    1594.5×
  19. 19Los ÁngelesBiobio, Chile
    1594.5×
  20. 20TalaganteSantiago Metropolitan, Chile
    1584.4×
  21. 21GayaBihar, India
    1584.3×
  22. 22SuratGujarat, India
    1574.3×
  23. 23TalcaMaule Region, Chile
    1564.2×
  24. 24SantiagoSantiago Metropolitan, Chile
    1564.1×
  25. 25DushanbeDushanbe, Tajikistan
    1554.1×
  26. 26QuilpuéValparaiso, Chile
    1554.1×
  27. 27Puerto AysénAysén, Chile
    1523.8×
  28. 28HualpénBiobio, Chile
    1523.8×
  29. 29LogroñoLa Rioja, Spain
    1523.8×
  30. 29HualquiBiobio, Chile
    1523.8×
  31. 31GummidipundiTamil Nadu, India
    1513.7×
  32. 32ChillánÑuble, Chile
    1513.7×
  33. 33Puerto VarasLos Lagos Region, Chile
    1483.6×
  34. 34BegusaraiBihar, India
    1443.5×
  35. 35Gujranwalalow-cost sensorsPunjab, Pakistan
    1403.4×
  36. 35NagapattinamTamil Nadu, India
    1403.4×
  37. 37ConcónValparaiso, Chile
    1393.4×
  38. 38Santa Anita - Los FicusLima region, Peru
    1373.3×
  39. 39QuillotaValparaiso, Chile
    1323.2×
  40. 40CholulaPuebla, Mexico
    1313.2×
  41. 41JodaOdisha, India
    1313.2×
  42. 42Puente AltoSantiago Metropolitan, Chile
    1303.1×
  43. 43Sialkotlow-cost sensorsPunjab, Pakistan
    1263.0×
  44. 44San CarlosÑuble, Chile
    1253.0×
  45. 45Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1253.0×
  46. 46LoniUttar Pradesh, India
    1243.0×
  47. 47San Francisco De BorjaLima region, Peru
    1243.0×
  48. 48TiruchirappalliTamil Nadu, India
    1233.0×
  49. 48KotaRajasthan, India
    1233.0×
  50. 48CauquenesMaule Region, Chile
    1233.0×
  51. 51TemucoAraucania, Chile
    1233.0×
  52. 52Faisalabadlow-cost sensorsPunjab, Pakistan
    1202.9×
  53. 52TonkRajasthan, India
    1202.9×
  54. 54HafnarfjörðurCapital Region, Iceland
    1192.9×
  55. 55GhāziābādUttar Pradesh, India
    1192.9×
  56. 56RājgīrBihar, India
    1192.8×
  57. 56OsornoLos Lagos Region, Chile
    1192.8×
  58. 58Gadag-BetageriKarnataka, India
    1172.8×
  59. 59HājīpurBihar, India
    1162.8×
  60. 60JhānsiUttar Pradesh, India
    1152.7×
  61. 61NajafgarhDelhi, India
    1152.7×
  62. 62CuddaloreTamil Nadu, India
    1142.7×
  63. 63Lahorelow-cost sensorsPunjab, Pakistan
    1132.7×
  64. 64Rawalpindilow-cost sensorsPunjab, Pakistan
    1132.7×
  65. 64La UniónLos Ríos Region, Chile
    1132.7×
  66. 66ChiguayanteBiobio, Chile
    1132.7×
  67. 67San Pedro de la PazBiobio, Chile
    1122.7×
  68. 68Des PlainesIllinois, United States
    1112.6×
  69. 69RockfordIllinois, United States
    1092.6×
  70. 70Franklin ParkIllinois, United States
    1092.6×
  71. 71RatlāmMadhya Pradesh, India
    1082.6×
  72. 72KadapaAndhra Pradesh, India
    1082.6×
  73. 73MandideepMadhya Pradesh, India
    1072.5×
  74. 74CallaoCallao, Peru
    1072.5×
  75. 75BhiwadiRajasthan, India
    1072.5×
  76. 76NoidaUttar Pradesh, India
    1062.5×
  77. 77ChāndaMaharashtra, India
    1062.5×
  78. 77BawānaDelhi, India
    1062.5×
  79. 79VillarricaAraucania, Chile
    1052.5×
  80. 79ValdiviaLos Ríos Region, Chile
    1052.5×
  81. 81RasapūdipalemAndhra Pradesh, India
    1052.5×
  82. 82ManamaManama, Bahrain
    1042.4×
  83. 82DurgapurWest Bengal, India
    1042.4×
  84. 84LucknowUttar Pradesh, India
    1032.4×
  85. 85DelhiDelhi, India
    1032.4×
  86. 86QuinteroValparaiso, Chile
    1032.4×
  87. 87AnantapurAndhra Pradesh, India
    1022.4×
  88. 88KanpurUttar Pradesh, India
    1022.4×
  89. 89Dubailow-cost sensorsDubai, United Arab Emirates
    1022.4×
  90. 89JakartaJakarta, Indonesia
    1022.4×
  91. 91Elmwood ParkIllinois, United States
    1002.3×
  92. 92ElginIllinois, United States
    992.3×
  93. 93Viña del MarValparaiso, Chile
    992.3×
  94. 93CaryIllinois, United States
    992.3×
  95. 95NarelaDelhi, India
    982.3×
  96. 96VijayawadaAndhra Pradesh, India
    972.3×
  97. 97SingrauliMadhya Pradesh, India
    972.3×
  98. 98MaiharMadhya Pradesh, India
    972.3×
  99. 99NagaonAssam, India
    972.2×
  100. 100ĀsansolWest Bengal, India
    962.2×
  101. 100KalamazooMichigan, United States
    962.2×
  102. 100Eau ClaireWisconsin, United States
    962.2×
  103. 103Greater NoidaUttar Pradesh, India
    962.2×
  104. 104TalcahuanoBiobio, Chile
    962.2×
  105. 104CoquimboCoquimbo Region, Chile
    962.2×
  106. 106DausaRajasthan, India
    952.2×
  107. 107DādriUttar Pradesh, India
    952.2×
  108. 108BulandshahrUttar Pradesh, India
    952.2×
  109. 109ChittoorAndhra Pradesh, India
    952.2×
  110. 110MuzaffarnagarUttar Pradesh, India
    942.2×
  111. 111SaharsaBihar, India
    942.1×
  112. 111BaddiHimachal Pradesh, India
    942.1×
  113. 113NorthbrookIllinois, United States
    942.1×
  114. 114Puerto MonttLos Lagos Region, Chile
    932.1×
  115. 115Oconomowoclow-cost sensorsWisconsin, United States
    932.1×
  116. 116MadisonWisconsin, United States
    922.1×
  117. 117BhilwaraRajasthan, India
    922.1×
  118. 117TocopillaAntofagasta, Chile
    922.1×
  119. 119MorādābādUttar Pradesh, India
    912.1×
  120. 119Grand RapidsMichigan, United States
    912.1×
  121. 121RājsamandRajasthan, India
    912.0×
  122. 121ZionIllinois, United States
    912.0×
  123. 121CalgaryAlberta, Canada
    912.0×
  124. 121PithampurMadhya Pradesh, India
    912.0×
  125. 125HāpurUttar Pradesh, India
    912.0×
  126. 126RangioraCanterbury, New Zealand
    902.0×
  127. 127JaipurRajasthan, India
    902.0×
  128. 128NalbāriAssam, India
    902.0×
  129. 128BridgeviewIllinois, United States
    902.0×
  130. 128JenisonMichigan, United States
    902.0×
  131. 128QuthbullapurTelangana, India
    902.0×
  132. 132HollandMichigan, United States
    902.0×
  133. 133ChicagoIllinois, United States
    892.0×
  134. 134LimaLima Province, Peru
    881.9×
  135. 135Addis AbabaAddis Ababa, Ethiopia
    881.9×
  136. 135RānīganjWest Bengal, India
    881.9×
  137. 137Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    881.9×
  138. 137Karachilow-cost sensorsSindh, Pakistan
    881.9×
  139. 137BrookfieldIllinois, United States
    881.9×
  140. 140PatnaBihar, India
    871.9×
  141. 140ChristchurchCanterbury, New Zealand
    871.9×
  142. 142HyderabadTelangana, India
    871.9×
  143. 142GorakhpurUttar Pradesh, India
    871.9×
  144. 144MuzaffarpurBihar, India
    871.9×
  145. 144JabalpurMadhya Pradesh, India
    871.9×
  146. 144GūduvāncheriTamil Nadu, India
    871.9×
  147. 147Istanbullow-cost sensorsIstanbul, Turkey
    861.9×
  148. 148PurniaBihar, India
    861.9×
  149. 148Temalow-cost sensorsGreater Accra, Ghana
    861.9×
  150. 148ConcepciónBiobio, Chile
    861.9×
  151. 151NandedMaharashtra, India
    861.9×
  152. 151NapervilleIllinois, United States
    861.9×
  153. 153UdaipurRajasthan, India
    861.8×
  154. 153MohaliPunjab, India
    861.8×
  155. 155La SerenaCoquimbo Region, Chile
    851.8×
  156. 156WyomingMichigan, United States
    851.8×
  157. 157BilāspurChhattisgarh, India
    851.8×
  158. 158Aya NagarDelhi, India
    841.8×
  159. 159MilwaukeeWisconsin, United States
    841.8×
  160. 160Islamabadlow-cost sensorsIslamabad, Pakistan
    841.8×
  161. 160ReykjavíkCapital Region, Iceland
    841.8×
  162. 160AirdrieAlberta, Canada
    841.8×
  163. 163KannurKerala, India
    841.8×
  164. 164South MilwaukeeWisconsin, United States
    831.8×
  165. 165XonacatlánMéxico, Mexico
    831.8×
  166. 166Saint PaulMinnesota, United States
    831.7×
  167. 167AmravatiMaharashtra, India
    831.7×
  168. 168MalegaonMaharashtra, India
    821.7×
  169. 169Villa Poeta José Gálvez BarrenecheaLima region, Peru
    821.7×
  170. 169MinneapolisMinnesota, United States
    821.7×
  171. 171BadlapurMaharashtra, India
    821.7×
  172. 171AjmerRajasthan, India
    821.7×
  173. 171BlaineMinnesota, United States
    821.7×
  174. 174Quezon Citylow-cost sensorsNational Capital Region, Philippines
    811.7×
  175. 175San Francisco TlalcilalcalpanMéxico, Mexico
    811.7×
  176. 175AuroraIllinois, United States
    811.7×
  177. 177LudhianaPunjab, India
    811.7×
  178. 177KanchipuramTamil Nadu, India
    811.7×
  179. 179DurgChhattisgarh, India
    811.7×
  180. 179RochesterMinnesota, United States
    811.7×
  181. 181ThrissurKerala, India
    801.7×
  182. 182AtlixcoPuebla, Mexico
    801.6×
  183. 183AhmedabadGujarat, India
    801.6×
  184. 184RishīkeshUttarakhand, India
    801.6×
  185. 185NagpurMaharashtra, India
    801.6×
  186. 185LotaBiobio, Chile
    801.6×
  187. 187Changchunlow-cost sensorsJilin, China
    791.6×
  188. 187Oak LawnIllinois, United States
    791.6×
  189. 189EdmontonAlberta, Canada
    791.6×
  190. 190Multanlow-cost sensorsPunjab, Pakistan
    791.6×
  191. 190TuxtlaChiapas, Mexico
    791.6×
  192. 192SiliguriWest Bengal, India
    781.6×
  193. 193BhiwandiMaharashtra, India
    781.6×
  194. 193AricaArica y Parinacota Region, Chile
    781.6×
  195. 195LansingMichigan, United States
    781.6×
  196. 196RourkelaOdisha, India
    771.6×
  197. 197AriyalūrTamil Nadu, India
    771.5×
  198. 198SīkarRajasthan, India
    771.5×
  199. 199MangaluruKarnataka, India
    771.5×
  200. 200AshburtonCanterbury, New Zealand
    771.5×

Top 200 of 2,479 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 21, 2025, smogrank.com/history/2025-07-21 (accessed 2 Oct 2026).

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