SmogRank / History / July 26, 2023

Most polluted cities on July 26, 2023

1,274 cities ranked by their average PM2.5 over the day; the worst was Coyhaique, Chile, at 144.5 µg/m³. Each city's own local calendar day.

Bad-air episodes during July 26, 2023. All episodes.

← Coyhaique 144.5 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for July 26, 2023, 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. 1CoyhaiqueAysén, Chile
    2209.6×
  2. 2OsornoLos Lagos Region, Chile
    1826.6×
  3. 3Puerto AysénAysén, Chile
    1675.2×
  4. 4La UniónLos Ríos Region, Chile
    1644.9×
  5. 5San CarlosÑuble, Chile
    1624.8×
  6. 6San Mateo AtencoMéxico, Mexico
    1624.7×
  7. 7LinaresMaule Region, Chile
    1614.6×
  8. 8NacimientoBiobio, Chile
    1594.4×
  9. 9TalcahuanoBiobio, Chile
    1554.1×
  10. 10ChillánÑuble, Chile
    1544.0×
  11. 11CuranilahueBiobio, Chile
    1533.9×
  12. 12ValdiviaLos Ríos Region, Chile
    1513.7×
  13. 13CauquenesMaule Region, Chile
    1433.5×
  14. 14TemucoAraucania, Chile
    1433.5×
  15. 15Puerto VarasLos Lagos Region, Chile
    1423.5×
  16. 16Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1403.4×
  17. 17Puerto MonttLos Lagos Region, Chile
    1403.4×
  18. 18Lahorelow-cost sensorsPunjab, Pakistan
    1363.3×
  19. 19JakartaJakarta, Indonesia
    1343.3×
  20. 20DushanbeDushanbe, Tajikistan
    1283.1×
  21. 21CoronelBiobio, Chile
    1212.9×
  22. 22Los ÁngelesBiobio, Chile
    1202.9×
  23. 23ToméBiobio, Chile
    1162.8×
  24. 23RengoO'Higgins Region, Chile
    1162.8×
  25. 25Wan ChaiWan Chai, Hong Kong
    1112.6×
  26. 26Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1092.6×
  27. 27SantiagoSantiago Metropolitan, Chile
    1082.5×
  28. 28MexicaliBaja California, Mexico
    1072.5×
  29. 29BarrieOntario, Canada
    1042.4×
  30. 29NewmarketOntario, Canada
    1042.4×
  31. 31RancaguaO'Higgins Region, Chile
    1032.4×
  32. 32TalaganteSantiago Metropolitan, Chile
    1032.4×
  33. 33LansingMichigan, United States
    1012.4×
  34. 34BeijingBeijing, China
    1002.4×
  35. 35CuricóMaule Region, Chile
    992.3×
  36. 36PristinaPristina, Kosovo
    982.3×
  37. 37HollandMichigan, United States
    982.3×
  38. 38Puente AltoSantiago Metropolitan, Chile
    972.2×
  39. 38ConcepciónBiobio, Chile
    972.2×
  40. 40PeterboroughOntario, Canada
    942.1×
  41. 41HualquiBiobio, Chile
    932.1×
  42. 41OakvilleOntario, Canada
    932.1×
  43. 43GuangzhouGuangdong, China
    932.1×
  44. 43Grand RapidsMichigan, United States
    932.1×
  45. 45San Pedro de la PazBiobio, Chile
    932.1×
  46. 46TalcaMaule Region, Chile
    932.1×
  47. 47Bay CityMichigan, United States
    922.1×
  48. 48MiltonOntario, Canada
    922.1×
  49. 49SarajevoFederation of B&H, Bosnia and Herzegovina
    912.1×
  50. 50JenisonMichigan, United States
    912.0×
  51. 51AsprópyrgosAttica, Greece
    912.0×
  52. 52GuelphOntario, Canada
    912.0×
  53. 53FlintMichigan, United States
    912.0×
  54. 53KitchenerOntario, Canada
    912.0×
  55. 55Port HuronMichigan, United States
    902.0×
  56. 56QuillotaValparaiso, Chile
    902.0×
  57. 57SalorTashkent Region, Uzbekistan
    881.9×
  58. 57BramptonOntario, Canada
    881.9×
  59. 59SarniaOntario, Canada
    881.9×
  60. 60Mong KokYau Tsim Mong District, Hong Kong
    881.9×
  61. 60KalamazooMichigan, United States
    881.9×
  62. 62Santa Anita - Los FicusLima region, Peru
    871.9×
  63. 63TorontoOntario, Canada
    861.9×
  64. 64DearbornMichigan, United States
    861.9×
  65. 65Tha BoNong Khai, Thailand
    861.8×
  66. 66DetroitMichigan, United States
    851.8×
  67. 67AthensAttica, Greece
    851.8×
  68. 68RedfordMichigan, United States
    851.8×
  69. 69Dhakalow-cost sensorsDhaka Division, Bangladesh
    841.8×
  70. 69TaylorMichigan, United States
    841.8×
  71. 71ShenyangLiaoning, China
    841.8×
  72. 72XonacatlánMéxico, Mexico
    831.8×
  73. 72TolucaMéxico, Mexico
    831.8×
  74. 74CornwallOntario, Canada
    831.8×
  75. 75San Francisco TlalcilalcalpanMéxico, Mexico
    831.7×
  76. 76EdinburgTexas, United States
    831.7×
  77. 77MilwaukeeWisconsin, United States
    821.7×
  78. 78Sau Mau PingKwun Tong District, Hong Kong
    821.7×
  79. 78LondonOntario, Canada
    821.7×
  80. 80HoustonTexas, United States
    821.7×
  81. 80WindsorOntario, Canada
    821.7×
  82. 82Corpus ChristiTexas, United States
    821.7×
  83. 83GalvestonTexas, United States
    811.7×
  84. 84Ciudad JuárezChihuahua, Mexico
    811.7×
  85. 84South BendIndiana, United States
    811.7×
  86. 86YpsilantiMichigan, United States
    811.7×
  87. 87BrooklinOntario, Canada
    811.7×
  88. 88ElkhartIndiana, United States
    801.7×
  89. 89LaredoTexas, United States
    801.7×
  90. 89MississaugaOntario, Canada
    801.7×
  91. 91BaytownTexas, United States
    801.6×
  92. 91HamiltonOntario, Canada
    801.6×
  93. 93DelhiDelhi, India
    801.6×
  94. 94San Tung Chung HangIslands, Hong Kong
    801.6×
  95. 95Lexingtonlow-cost sensorsMassachusetts, United States
    801.6×
  96. 95Casa GrandeArizona, United States
    801.6×
  97. 97AcharnésAttica, Greece
    791.6×
  98. 97Nong KhaemBangkok, Thailand
    791.6×
  99. 99SliemaTas-Sliema, Malta
    791.6×
  100. 99ClevelandOhio, United States
    791.6×
  101. 101CheektowagaNew York, United States
    791.6×
  102. 102Little RockArkansas, United States
    791.6×
  103. 102WestervilleOhio, United States
    791.6×
  104. 102OttawaOntario, Canada
    791.6×
  105. 105Neu-UlmBavaria, Germany
    791.6×
  106. 105KenmoreNew York, United States
    791.6×
  107. 105BrantfordOntario, Canada
    791.6×
  108. 108MiddletownOhio, United States
    781.6×
  109. 108Live OakTexas, United States
    781.6×
  110. 108Missouri CityTexas, United States
    781.6×
  111. 111AustinTexas, United States
    781.6×
  112. 112Naucalpan de JuárezMéxico, Mexico
    771.6×
  113. 112Mission BendTexas, United States
    771.6×
  114. 112North BayOntario, Canada
    771.6×
  115. 115AstanaAstana, Kazakhstan
    771.5×
  116. 115Ciudad ApodacaNuevo León, Mexico
    771.5×
  117. 117BamakoBamako, Mali
    771.5×
  118. 117West MifflinPennsylvania, United States
    771.5×
  119. 119KhalándrionAttica, Greece
    771.5×
  120. 119HanoiHanoi, Vietnam
    771.5×
  121. 119South MilwaukeeWisconsin, United States
    771.5×
  122. 122NorwoodOhio, United States
    771.5×
  123. 122Franklin ParkIllinois, United States
    771.5×
  124. 122St. ThomasOntario, Canada
    771.5×
  125. 125DaytonOhio, United States
    761.5×
  126. 125NorthbrookIllinois, United States
    761.5×
  127. 127Calumet CityIllinois, United States
    761.5×
  128. 127ChathamOntario, Canada
    761.5×
  129. 127SherbrookeQuebec, Canada
    761.5×
  130. 130La PorteTexas, United States
    761.5×
  131. 130L'Ancienne-LoretteQuebec, Canada
    761.5×
  132. 132Tin Shui WaiYuen Long, Hong Kong
    761.5×
  133. 132VictoriaCentral and Western, Hong Kong
    761.5×
  134. 132PasadenaTexas, United States
    761.5×
  135. 135Kwai ChungKwai Tsing District, Hong Kong
    751.5×
  136. 136SpringfieldOhio, United States
    751.5×
  137. 137Bang Bo DistrictSamut Prakan, Thailand
    751.5×
  138. 137AntofagastaAntofagasta, Chile
    751.5×
  139. 137Ciudad Benito JuárezNuevo León, Mexico
    751.5×
  140. 137MasonOhio, United States
    751.5×
  141. 137BrossardQuebec, Canada
    751.5×
  142. 142CantonOhio, United States
    751.5×
  143. 142Eagle PassTexas, United States
    751.5×
  144. 144Tsuen WanTsuen Wan, Hong Kong
    751.5×
  145. 144JolietIllinois, United States
    751.5×
  146. 146QuinteroValparaiso, Chile
    741.4×
  147. 146Green BayWisconsin, United States
    741.4×
  148. 146MontréalQuebec, Canada
    741.4×
  149. 149Tai PoTai Po, Hong Kong
    741.4×
  150. 149BirminghamAlabama, United States
    741.4×
  151. 151BitolaBitola, North Macedonia
    741.4×
  152. 151Abujalow-cost sensorsFCT, Nigeria
    741.4×
  153. 151LotaBiobio, Chile
    741.4×
  154. 154MostaIl-Mosta, Malta
    741.4×
  155. 154Ferry PassFlorida, United States
    741.4×
  156. 156RochesterNew York, United States
    741.4×
  157. 157Tuen MunTuen Mun, Hong Kong
    731.4×
  158. 157College StationTexas, United States
    731.4×
  159. 157GranbyQuebec, Canada
    731.4×
  160. 160MidwayFlorida, United States
    731.4×
  161. 161Viña del MarValparaiso, Chile
    731.4×
  162. 161NapervilleIllinois, United States
    731.4×
  163. 163Karachilow-cost sensorsSindh, Pakistan
    731.4×
  164. 163CincinnatiOhio, United States
    731.4×
  165. 163LebanonOhio, United States
    731.4×
  166. 163San AntonioTexas, United States
    731.4×
  167. 167RaleighNorth Carolina, United States
    731.4×
  168. 168West MemphisArkansas, United States
    721.4×
  169. 169BeltonTexas, United States
    721.4×
  170. 170Rivière-des-Prairies–Pointe-aux-TremblesQuebec, Canada
    721.4×
  171. 171BucharestBucharest, Romania
    721.4×
  172. 171Islamabadlow-cost sensorsIslamabad, Pakistan
    721.4×
  173. 171CoquimboCoquimbo Region, Chile
    721.4×
  174. 174HattiesburgMississippi, United States
    721.3×
  175. 174East ChicagoIndiana, United States
    721.3×
  176. 174DublinOhio, United States
    721.3×
  177. 174AltoonaPennsylvania, United States
    721.3×
  178. 174San Salvador TizatlalliMéxico, Mexico
    721.3×
  179. 179PittsburghPennsylvania, United States
    711.3×
  180. 180ChicagoIllinois, United States
    711.3×
  181. 180ToledoOhio, United States
    711.3×
  182. 182JacksonMississippi, United States
    711.3×
  183. 182ConroeTexas, United States
    711.3×
  184. 182SyracuseNew York, United States
    711.3×
  185. 182BellevilleOntario, Canada
    711.3×
  186. 182KingstonOntario, Canada
    711.3×
  187. 187ChennaiTamil Nadu, India
    711.3×
  188. 188HueytownAlabama, United States
    711.3×
  189. 189MedinaOhio, United States
    701.3×
  190. 190AndersonIndiana, United States
    701.3×
  191. 190AppletonWisconsin, United States
    701.3×
  192. 190WaukeshaWisconsin, United States
    701.3×
  193. 190DorvalQuebec, Canada
    701.3×
  194. 190QuébecQuebec, Canada
    701.3×
  195. 195LimaLima Province, Peru
    701.3×
  196. 195East RidgeTennessee, United States
    701.3×
  197. 195HammondIndiana, United States
    701.3×
  198. 198ConcónValparaiso, Chile
    701.3×
  199. 198DallasTexas, United States
    701.3×
  200. 198ZionIllinois, United States
    701.3×

Top 200 of 1,274 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 26, 2023, smogrank.com/history/2023-07-26 (accessed 2 Oct 2026).

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