SmogRank / History / August 28, 2023

Most polluted cities on August 28, 2023

1,825 cities ranked by their average PM2.5 over the day; the worst was Grants Pass, United States, at 211.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during August 28, 2023. All episodes.

← Grants Pass 211.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for August 28, 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. 1Grants PassOregon, United States
    28614.1×
  2. 2RoseburgOregon, United States
    25912.3×
  3. 3MedfordOregon, United States
    23510.7×
  4. 4BendOregon, United States
    23010.3×
  5. 5AshlandOregon, United States
    2249.9×
  6. 6RedmondOregon, United States
    1967.9×
  7. 7Fort McMurrayAlberta, Canada
    1786.3×
  8. 8Grande PrairieAlberta, Canada
    1695.5×
  9. 9ReginaSaskatchewan, Canada
    1644.9×
  10. 10The DallesOregon, United States
    1634.8×
  11. 11XonacatlánMéxico, Mexico
    1624.8×
  12. 12Dhakalow-cost sensorsDhaka Division, Bangladesh
    1624.7×
  13. 13KolkataWest Bengal, India
    1604.5×
  14. 14Fort St. JohnBritish Columbia, Canada
    1594.5×
  15. 15Prince AlbertSaskatchewan, Canada
    1584.3×
  16. 16AltamontOregon, United States
    1564.2×
  17. 17NacimientoBiobio, Chile
    1564.2×
  18. 18EdmontonAlberta, Canada
    1554.1×
  19. 19IlindenIlinden, North Macedonia
    1544.0×
  20. 20AlexandriaAlexandria, Egypt
    1513.7×
  21. 21KamloopsBritish Columbia, Canada
    1493.7×
  22. 22Swift CurrentSaskatchewan, Canada
    1423.5×
  23. 23HualquiBiobio, Chile
    1383.4×
  24. 24Kampalalow-cost sensorsCentral Region, Uganda
    1353.3×
  25. 25SaskatoonSaskatchewan, Canada
    1323.2×
  26. 26Puerto VarasLos Lagos Region, Chile
    1303.2×
  27. 27ChillánÑuble, Chile
    1233.0×
  28. 28Lahorelow-cost sensorsPunjab, Pakistan
    1233.0×
  29. 29CuranilahueBiobio, Chile
    1182.8×
  30. 30DelhiDelhi, India
    1172.8×
  31. 31CauquenesMaule Region, Chile
    1172.8×
  32. 32San CarlosÑuble, Chile
    1162.8×
  33. 32CuricóMaule Region, Chile
    1162.8×
  34. 34Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1132.7×
  35. 35TalcaMaule Region, Chile
    1122.7×
  36. 36TarnówLesser Poland, Poland
    1102.6×
  37. 37PentictonBritish Columbia, Canada
    1102.6×
  38. 38La UniónLos Ríos Region, Chile
    1092.6×
  39. 39RengoO'Higgins Region, Chile
    1072.5×
  40. 40CoyhaiqueAysén, Chile
    1052.5×
  41. 41PristinaPristina, Kosovo
    1032.4×
  42. 42OsornoLos Lagos Region, Chile
    1022.4×
  43. 43CoronelBiobio, Chile
    1002.3×
  44. 44N'DjamenaN’Djaména, Chad
    992.3×
  45. 45SantiagoSantiago Metropolitan, Chile
    992.3×
  46. 46RancaguaO'Higgins Region, Chile
    972.3×
  47. 46Los ÁngelesBiobio, Chile
    972.3×
  48. 48Puerto AysénAysén, Chile
    972.3×
  49. 49Red DeerAlberta, Canada
    972.2×
  50. 50San Salvador TizatlalliMéxico, Mexico
    972.2×
  51. 51San Francisco TlalcilalcalpanMéxico, Mexico
    962.2×
  52. 51TalaganteSantiago Metropolitan, Chile
    962.2×
  53. 53ValdiviaLos Ríos Region, Chile
    952.2×
  54. 53LimaLima Province, Peru
    952.2×
  55. 55KigaliKigali, Rwanda
    952.2×
  56. 56TolucaMéxico, Mexico
    932.1×
  57. 56MexicaliBaja California, Mexico
    932.1×
  58. 58Santa Anita - Los FicusLima region, Peru
    932.1×
  59. 59KelownaBritish Columbia, Canada
    922.1×
  60. 60TalcahuanoBiobio, Chile
    922.1×
  61. 60Puerto MonttLos Lagos Region, Chile
    922.1×
  62. 62CuernavacaMorelos, Mexico
    912.0×
  63. 63VernonBritish Columbia, Canada
    912.0×
  64. 64Sherwood ParkAlberta, Canada
    912.0×
  65. 65St. AlbertAlberta, Canada
    902.0×
  66. 66SarajevoFederation of B&H, Bosnia and Herzegovina
    892.0×
  67. 67AntofagastaAntofagasta, Chile
    892.0×
  68. 68Şabāḩ as SālimMubārak al Kabīr, Kuwait
    881.9×
  69. 68Medicine HatAlberta, Canada
    881.9×
  70. 70Puente AltoSantiago Metropolitan, Chile
    871.9×
  71. 71TerraceBritish Columbia, Canada
    871.9×
  72. 72PrešovPrešov Region, Slovakia
    861.9×
  73. 73BamakoBamako, Mali
    851.8×
  74. 73TemucoAraucania, Chile
    851.8×
  75. 75ChiguayanteBiobio, Chile
    851.8×
  76. 75Victoria de DurangoDurango, Mexico
    851.8×
  77. 77TijuanaBaja California, Mexico
    841.8×
  78. 78CoquimboCoquimbo Region, Chile
    831.8×
  79. 79QuillotaValparaiso, Chile
    831.7×
  80. 80Islamabadlow-cost sensorsIslamabad, Pakistan
    821.7×
  81. 81Ciudad JuárezChihuahua, Mexico
    811.7×
  82. 81ChilliwackBritish Columbia, Canada
    811.7×
  83. 83KošiceKošice Region, Slovakia
    801.6×
  84. 84ChennaiTamil Nadu, India
    791.6×
  85. 85DushanbeDushanbe, Tajikistan
    791.6×
  86. 85AnconaThe Marches, Italy
    791.6×
  87. 87San Pedro de la PazBiobio, Chile
    791.6×
  88. 88NairobiNairobi County, Kenya
    781.6×
  89. 89ToméBiobio, Chile
    781.6×
  90. 89QuinteroValparaiso, Chile
    781.6×
  91. 91CourtenayBritish Columbia, Canada
    771.6×
  92. 92HumennéPrešov Region, Slovakia
    771.5×
  93. 92CalgaryAlberta, Canada
    771.5×
  94. 94Campbell RiverBritish Columbia, Canada
    771.5×
  95. 95SliemaTas-Sliema, Malta
    771.5×
  96. 96ConcónValparaiso, Chile
    771.5×
  97. 97Kathmandulow-cost sensorsBagmati Province, Nepal
    761.5×
  98. 98La SerenaCoquimbo Region, Chile
    751.5×
  99. 98LibertyMissouri, United States
    751.5×
  100. 100ConcepciónBiobio, Chile
    751.5×
  101. 101SquamishBritish Columbia, Canada
    741.4×
  102. 102PrzemyślSubcarpathia, Poland
    741.4×
  103. 102NanaimoBritish Columbia, Canada
    741.4×
  104. 104Ceglie MessapicaApulia, Italy
    741.4×
  105. 105LotaBiobio, Chile
    731.4×
  106. 106EugeneOregon, United States
    731.4×
  107. 106West VancouverBritish Columbia, Canada
    731.4×
  108. 108Spišská Nová VesKošice Region, Slovakia
    721.4×
  109. 108SalorTashkent Region, Uzbekistan
    721.4×
  110. 108JesiThe Marches, Italy
    721.4×
  111. 111AsprópyrgosAttica, Greece
    721.4×
  112. 111Karachilow-cost sensorsSindh, Pakistan
    721.4×
  113. 113MiskolcBorsod-Abaúj-Zemplén, Hungary
    721.4×
  114. 113CopiapóAtacama, Chile
    721.4×
  115. 115HanoiHanoi, Vietnam
    721.4×
  116. 115Viña del MarValparaiso, Chile
    721.4×
  117. 115Villa Poeta José Gálvez BarrenecheaLima region, Peru
    721.4×
  118. 118MostaIl-Mosta, Malta
    721.3×
  119. 119Samut SakhonSamut Sakhon, Thailand
    711.3×
  120. 119ZvolenBanská Bystrica Region, Slovakia
    711.3×
  121. 119Banja LukaSrpska, Bosnia and Herzegovina
    711.3×
  122. 122RzeszówSubcarpathia, Poland
    711.3×
  123. 123Falconara MarittimaThe Marches, Italy
    711.3×
  124. 123IssaquahWashington, United States
    711.3×
  125. 125TocopillaAntofagasta, Chile
    711.3×
  126. 126Ulu BedokSingapore
    711.3×
  127. 126ZapopanJalisco, Mexico
    711.3×
  128. 126Santa CatarinaNuevo León, Mexico
    711.3×
  129. 129AcharnésAttica, Greece
    711.3×
  130. 129Wan ChaiWan Chai, Hong Kong
    711.3×
  131. 129San Francisco De BorjaLima region, Peru
    711.3×
  132. 132AthensAttica, Greece
    701.3×
  133. 132HandlováTrenčín Region, Slovakia
    701.3×
  134. 134Chula VistaCalifornia, United States
    701.3×
  135. 135BellinghamWashington, United States
    701.3×
  136. 136BurnabyBritish Columbia, Canada
    701.3×
  137. 137SninaPrešov Region, Slovakia
    691.3×
  138. 137Ciudad ApodacaNuevo León, Mexico
    691.3×
  139. 139AnaheimCalifornia, United States
    691.3×
  140. 139CoquitlamBritish Columbia, Canada
    691.3×
  141. 139HarewoodBritish Columbia, Canada
    691.3×
  142. 142Addis AbabaAddis Ababa, Ethiopia
    691.2×
  143. 142Port ArthurTexas, United States
    691.2×
  144. 144TlaquepaqueJalisco, Mexico
    691.2×
  145. 145SpokaneWashington, United States
    681.2×
  146. 146PartizánskeTrenčín Region, Slovakia
    681.2×
  147. 147Banská BystricaBanská Bystrica Region, Slovakia
    681.2×
  148. 148HyderabadTelangana, India
    681.2×
  149. 148ComptonCalifornia, United States
    681.2×
  150. 150GalvestonTexas, United States
    681.2×
  151. 150Port CoquitlamBritish Columbia, Canada
    681.2×
  152. 152GuangzhouGuangdong, China
    671.2×
  153. 152CranbrookBritish Columbia, Canada
    671.2×
  154. 154KrosnoSubcarpathia, Poland
    671.2×
  155. 154AricaArica y Parinacota Region, Chile
    671.2×
  156. 156Ciudad Benito JuárezNuevo León, Mexico
    671.2×
  157. 157TetovoTetovo, North Macedonia
    671.2×
  158. 157HermistonOregon, United States
    671.2×
  159. 159Vranov nad TopľouPrešov Region, Slovakia
    671.2×
  160. 159BitolaBitola, North Macedonia
    671.2×
  161. 159PécsBaranya, Hungary
    671.2×
  162. 162Arroyo GrandeCalifornia, United States
    661.2×
  163. 162AirdrieAlberta, Canada
    661.2×
  164. 162North VancouverBritish Columbia, Canada
    661.2×
  165. 165PopradPrešov Region, Slovakia
    661.2×
  166. 165Nong KhaemBangkok, Thailand
    661.2×
  167. 165Ang Mo Kio New TownSingapore
    661.2×
  168. 165NitraNitra Region, Slovakia
    661.2×
  169. 169Calumet CityIllinois, United States
    661.1×
  170. 169LangleyBritish Columbia, Canada
    661.1×
  171. 171San DiegoCalifornia, United States
    661.1×
  172. 171ShorelineWashington, United States
    661.1×
  173. 173KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    661.1×
  174. 173DunaújvárosFejér, Hungary
    661.1×
  175. 173Los AngelesCalifornia, United States
    661.1×
  176. 173AbbotsfordBritish Columbia, Canada
    661.1×
  177. 177Alto HospicioTarapacá, Chile
    661.1×
  178. 178Spokane ValleyWashington, United States
    651.1×
  179. 179OceansideCalifornia, United States
    651.1×
  180. 179AberdeenWashington, United States
    651.1×
  181. 179Port AngelesWashington, United States
    651.1×
  182. 182NaplesCampania, Italy
    651.1×
  183. 183Santa BarbaraCalifornia, United States
    651.1×
  184. 184Ferry PassFlorida, United States
    641.1×
  185. 184Great FallsMontana, United States
    641.1×
  186. 186ReddingCalifornia, United States
    641.1×
  187. 187SzegedCsongrád, Hungary
    641.1×
  188. 187CalamaAntofagasta, Chile
    641.1×
  189. 187Moses LakeWashington, United States
    641.1×
  190. 187SeattleWashington, United States
    641.1×
  191. 191BremertonWashington, United States
    641.1×
  192. 191SunnysideWashington, United States
    641.1×
  193. 193BakuBaki, Azerbaijan
    641.1×
  194. 193Franklin ParkIllinois, United States
    641.1×
  195. 195LiberpolisCounty of Osijek-Baranja, Croatia
    631.1×
  196. 196BirminghamAlabama, United States
    631.0×
  197. 196RentonWashington, United States
    631.0×
  198. 198Bang Bo DistrictSamut Prakan, Thailand
    631.0×
  199. 198VictoriaBritish Columbia, Canada
    631.0×
  200. 200KasaokaOkayama, Japan
    631.0×

Top 200 of 1,825 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 28, 2023, smogrank.com/history/2023-08-28 (accessed 2 Oct 2026).

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