SmogRank / History / July 23, 2025

Most polluted cities on July 23, 2025

2,536 cities ranked by their average PM2.5 over the day; the worst was Osorno, Chile, at 148.5 µg/m³. Each city's own local calendar day.

Bad-air episodes during July 23, 2025. All episodes.

← Osorno 148.5 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for July 23, 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. 1OsornoLos Lagos Region, Chile
    2249.9×
  2. 2DhaulpurRajasthan, India
    2058.7×
  3. 3LinaresMaule Region, Chile
    2008.3×
  4. 4CoyhaiqueAysén, Chile
    1998.3×
  5. 5La UniónLos Ríos Region, Chile
    1897.3×
  6. 6RamanathapuramTamil Nadu, India
    1856.9×
  7. 7OotyTamil Nadu, India
    1846.8×
  8. 8CuricóMaule Region, Chile
    1836.7×
  9. 9Sri GanganagarRajasthan, India
    1776.2×
  10. 10BhelaiChhattisgarh, India
    1776.2×
  11. 11NacimientoBiobio, Chile
    1776.2×
  12. 12Puerto VarasLos Lagos Region, Chile
    1766.1×
  13. 13HualpénBiobio, Chile
    1735.8×
  14. 14KigaliKigali, Rwanda
    1725.7×
  15. 15Gadag-BetageriKarnataka, India
    1695.4×
  16. 16SamāstipurBihar, India
    1685.3×
  17. 17ValdiviaLos Ríos Region, Chile
    1675.2×
  18. 18Puerto MonttLos Lagos Region, Chile
    1665.2×
  19. 19JodaOdisha, India
    1655.0×
  20. 20TemucoAraucania, Chile
    1634.8×
  21. 21CuranilahueBiobio, Chile
    1624.8×
  22. 22SantiagoSantiago Metropolitan, Chile
    1604.5×
  23. 23VillarricaAraucania, Chile
    1594.4×
  24. 24GummidipundiTamil Nadu, India
    1584.4×
  25. 25GobindgarhPunjab, India
    1574.3×
  26. 26HassanKarnataka, India
    1564.1×
  27. 27CoronelBiobio, Chile
    1554.1×
  28. 28TalcaMaule Region, Chile
    1554.1×
  29. 29Lahorelow-cost sensorsPunjab, Pakistan
    1554.1×
  30. 30TalcahuanoBiobio, Chile
    1544.0×
  31. 31SingrauliMadhya Pradesh, India
    1543.9×
  32. 32TalaganteSantiago Metropolitan, Chile
    1523.8×
  33. 33RancaguaO'Higgins Region, Chile
    1513.7×
  34. 34ReginaSaskatchewan, Canada
    1463.6×
  35. 35San CarlosÑuble, Chile
    1403.4×
  36. 36JakartaJakarta, Indonesia
    1383.4×
  37. 37HājīpurBihar, India
    1353.3×
  38. 38SangāreddiTelangana, India
    1333.2×
  39. 39ChāndaMaharashtra, India
    1333.2×
  40. 40Faisalabadlow-cost sensorsPunjab, Pakistan
    1313.2×
  41. 41Los ÁngelesBiobio, Chile
    1303.1×
  42. 42Puente AltoSantiago Metropolitan, Chile
    1293.1×
  43. 43PāliRajasthan, India
    1253.0×
  44. 43HualquiBiobio, Chile
    1253.0×
  45. 45Dubailow-cost sensorsDubai, United Arab Emirates
    1233.0×
  46. 46Puerto AysénAysén, Chile
    1233.0×
  47. 47LoniUttar Pradesh, India
    1202.9×
  48. 48ĀsansolWest Bengal, India
    1182.8×
  49. 49Dera Colliery TownshipOdisha, India
    1162.8×
  50. 50DurgapurWest Bengal, India
    1152.8×
  51. 51GorakhpurUttar Pradesh, India
    1152.7×
  52. 52Santa Anita - Los FicusLima region, Peru
    1152.7×
  53. 53QuillotaValparaiso, Chile
    1122.7×
  54. 54ChillánÑuble, Chile
    1122.7×
  55. 54PithampurMadhya Pradesh, India
    1122.7×
  56. 56ToméBiobio, Chile
    1122.7×
  57. 57SaharsaBihar, India
    1112.6×
  58. 58VijayawadaAndhra Pradesh, India
    1082.6×
  59. 59SīkarRajasthan, India
    1072.5×
  60. 60QuilpuéValparaiso, Chile
    1062.5×
  61. 61Gujranwalalow-cost sensorsPunjab, Pakistan
    1052.5×
  62. 62San Pedro de la PazBiobio, Chile
    1052.5×
  63. 63DausaRajasthan, India
    1032.4×
  64. 64Swift CurrentSaskatchewan, Canada
    1032.4×
  65. 65CauquenesMaule Region, Chile
    1022.4×
  66. 66RangioraCanterbury, New Zealand
    992.3×
  67. 67ConcepciónBiobio, Chile
    992.3×
  68. 68RānīganjWest Bengal, India
    992.3×
  69. 68GayaBihar, India
    992.3×
  70. 70Addis AbabaAddis Ababa, Ethiopia
    982.3×
  71. 71TonkRajasthan, India
    982.3×
  72. 71BaddiHimachal Pradesh, India
    982.3×
  73. 71San Francisco De BorjaLima region, Peru
    982.3×
  74. 74AnantapurAndhra Pradesh, India
    972.3×
  75. 75GhāziābādUttar Pradesh, India
    962.2×
  76. 76MuzaffarpurBihar, India
    962.2×
  77. 77BarbilOdisha, India
    952.2×
  78. 78ManamaManama, Bahrain
    952.2×
  79. 79KadapaAndhra Pradesh, India
    952.2×
  80. 80Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    942.2×
  81. 80LucknowUttar Pradesh, India
    942.2×
  82. 82Istanbullow-cost sensorsIstanbul, Turkey
    942.2×
  83. 83MorādābādUttar Pradesh, India
    942.1×
  84. 84ArrahBihar, India
    942.1×
  85. 84West MemphisArkansas, United States
    942.1×
  86. 86BānswāraRajasthan, India
    942.1×
  87. 86VapiGujarat, India
    942.1×
  88. 88NāgaurRajasthan, India
    922.1×
  89. 89KishanganjBihar, India
    912.0×
  90. 90NalbāriAssam, India
    912.0×
  91. 90Wadgaon KolhatiMaharashtra, India
    912.0×
  92. 92JaipurRajasthan, India
    902.0×
  93. 93KotaRajasthan, India
    902.0×
  94. 93GandhinagarGujarat, India
    902.0×
  95. 95MuzaffarnagarUttar Pradesh, India
    902.0×
  96. 96MothīhāriBihar, India
    902.0×
  97. 97BelpaharOdisha, India
    892.0×
  98. 98LudhianaPunjab, India
    892.0×
  99. 98CallaoCallao, Peru
    892.0×
  100. 100TimaruCanterbury, New Zealand
    892.0×
  101. 101UdaipurRajasthan, India
    881.9×
  102. 101PurniaBihar, India
    881.9×
  103. 101ChiguayanteBiobio, Chile
    881.9×
  104. 101LimaLima Province, Peru
    881.9×
  105. 101MandideepMadhya Pradesh, India
    881.9×
  106. 106AlangadKerala, India
    881.9×
  107. 107NoidaUttar Pradesh, India
    881.9×
  108. 107NaharlagunArunachal Pradesh, India
    881.9×
  109. 109Multanlow-cost sensorsPunjab, Pakistan
    881.9×
  110. 109RourkelaOdisha, India
    881.9×
  111. 109MiryangGyeongsangnam-do, South Korea
    881.9×
  112. 112UlsanUlsan, South Korea
    871.9×
  113. 113San Salvador TizatlalliMéxico, Mexico
    871.9×
  114. 114West FargoNorth Dakota, United States
    871.9×
  115. 115San Francisco TlalcilalcalpanMéxico, Mexico
    871.9×
  116. 116QuinteroValparaiso, Chile
    871.9×
  117. 117ChangnyeongGyeongsangnam-do, South Korea
    861.9×
  118. 118HāpurUttar Pradesh, India
    861.9×
  119. 118MohaliPunjab, India
    861.9×
  120. 120DādriUttar Pradesh, India
    861.8×
  121. 121PatnaBihar, India
    851.8×
  122. 122Iloilolow-cost sensorsWestern Visayas, Philippines
    851.8×
  123. 123SiliguriWest Bengal, India
    851.8×
  124. 123KhannaPunjab, India
    851.8×
  125. 123DūngarpurRajasthan, India
    851.8×
  126. 126MungerBihar, India
    841.8×
  127. 127RājgīrBihar, India
    841.8×
  128. 127ChristchurchCanterbury, New Zealand
    841.8×
  129. 129MalegaonMaharashtra, India
    841.8×
  130. 129Viña del MarValparaiso, Chile
    841.8×
  131. 129Prince AlbertSaskatchewan, Canada
    841.8×
  132. 132XonacatlánMéxico, Mexico
    831.8×
  133. 133BusanBusan, South Korea
    831.8×
  134. 134KannurKerala, India
    831.7×
  135. 135TambaramTamil Nadu, India
    831.7×
  136. 135Temalow-cost sensorsGreater Accra, Ghana
    831.7×
  137. 137HayangGyeongsangbuk-do, South Korea
    821.7×
  138. 138VaranasiUttar Pradesh, India
    821.7×
  139. 139ConcónValparaiso, Chile
    821.7×
  140. 140NarelaDelhi, India
    821.7×
  141. 140AngulOdisha, India
    821.7×
  142. 142ChangwonGyeongsangnam-do, South Korea
    811.7×
  143. 142LethbridgeAlberta, Canada
    811.7×
  144. 144Sialkotlow-cost sensorsPunjab, Pakistan
    811.7×
  145. 145NaesŏGyeongsangnam-do, South Korea
    811.7×
  146. 146GuwahatiAssam, India
    801.7×
  147. 146AjmerRajasthan, India
    801.7×
  148. 148ChandigarhChandigarh, India
    801.6×
  149. 148Medicine HatAlberta, Canada
    801.6×
  150. 150AricaArica y Parinacota Region, Chile
    801.6×
  151. 151YangsanGyeongsangnam-do, South Korea
    791.6×
  152. 152Quettalow-cost sensorsBalochistan, Pakistan
    791.6×
  153. 153BāghpatUttar Pradesh, India
    791.6×
  154. 153CoquimboCoquimbo Region, Chile
    791.6×
  155. 155DurgChhattisgarh, India
    781.6×
  156. 156MeerutUttar Pradesh, India
    781.6×
  157. 156Santa CatarinaNuevo León, Mexico
    781.6×
  158. 158GoseongGyeongsangnam-do, South Korea
    781.6×
  159. 159JhānsiUttar Pradesh, India
    781.6×
  160. 159GijangBusan, South Korea
    781.6×
  161. 159Dunedinlow-cost sensorsOtago, New Zealand
    781.6×
  162. 162SilcharAssam, India
    771.6×
  163. 162La SerenaCoquimbo Region, Chile
    771.6×
  164. 162CatañoCataño, Puerto Rico
    771.6×
  165. 165HyderabadTelangana, India
    771.5×
  166. 165CopiapóAtacama, Chile
    771.5×
  167. 167BoisarMaharashtra, India
    771.5×
  168. 167KimhaeGyeongsangnam-do, South Korea
    771.5×
  169. 167UngsangGyeongsangnam-do, South Korea
    771.5×
  170. 167BhiwadiRajasthan, India
    771.5×
  171. 171BadlapurMaharashtra, India
    771.5×
  172. 171SinhyeonGyeongsangnam-do, South Korea
    771.5×
  173. 171ByasanagarOdisha, India
    771.5×
  174. 174JalandharPunjab, India
    771.5×
  175. 175Hyderabadlow-cost sensorsSindh, Pakistan
    771.5×
  176. 175ThāneMaharashtra, India
    771.5×
  177. 175TocopillaAntofagasta, Chile
    771.5×
  178. 175TlaquepaqueJalisco, Mexico
    771.5×
  179. 179JalgaonMaharashtra, India
    761.5×
  180. 179Gyeongsan-siGyeongsangbuk-do, South Korea
    761.5×
  181. 181DelhiDelhi, India
    761.5×
  182. 182Oconomowoclow-cost sensorsWisconsin, United States
    761.5×
  183. 183SarajevoFederation of B&H, Bosnia and Herzegovina
    761.5×
  184. 184ChūruRajasthan, India
    751.5×
  185. 184VijayapuraKarnataka, India
    751.5×
  186. 184BhiwandiMaharashtra, India
    751.5×
  187. 184AmritsarPunjab, India
    751.5×
  188. 184Wake Forestlow-cost sensorsNorth Carolina, United States
    751.5×
  189. 189BulandshahrUttar Pradesh, India
    751.5×
  190. 189SaltilloCoahuila, Mexico
    751.5×
  191. 189AshburtonCanterbury, New Zealand
    751.5×
  192. 189HadongGyeongsangnam-do, South Korea
    751.5×
  193. 193SibsāgarAssam, India
    751.5×
  194. 193TongyeongGyeongsangnam-do, South Korea
    751.5×
  195. 195GwangyangJeollanam-do, South Korea
    751.5×
  196. 195Alto HospicioTarapacá, Chile
    751.5×
  197. 197GarcíaNuevo León, Mexico
    741.4×
  198. 198ChennaiTamil Nadu, India
    741.4×
  199. 199Karachilow-cost sensorsSindh, Pakistan
    741.4×
  200. 199AcariRio de Janeiro, Brazil
    741.4×

Top 200 of 2,536 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

Use this board

SmogRank, most polluted cities, PM2.5, July 23, 2025, smogrank.com/history/2025-07-23 (accessed 2 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.