SmogRank / History / August 21, 2023

Most polluted cities on August 21, 2023

1,665 cities ranked by their average PM2.5 over the day; the worst was Kamloops, Canada, at 597.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during August 21, 2023. All episodes.

← Kamloops 597.0 µg/m³ 500 µg/m³15 WHO 24-hour guideline
Every city ranked for August 21, 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. 1KamloopsBritish Columbia, Canada
    500+39.8×
  2. 2Tri-CitiesWashington, United States
    28614.1×
  3. 3PentictonBritish Columbia, Canada
    28514.0×
  4. 4Walla WallaWashington, United States
    27113.1×
  5. 5HermistonOregon, United States
    27013.0×
  6. 6KelownaBritish Columbia, Canada
    24311.2×
  7. 7WenatcheeWashington, United States
    23810.9×
  8. 8SunnysideWashington, United States
    23310.5×
  9. 9RedmondOregon, United States
    23210.5×
  10. 9PascoWashington, United States
    23210.5×
  11. 11Moses LakeWashington, United States
    22910.3×
  12. 12YakimaWashington, United States
    2169.4×
  13. 13EllensburgWashington, United States
    2149.3×
  14. 14PendletonOregon, United States
    2008.3×
  15. 15VernonBritish Columbia, Canada
    1998.3×
  16. 16ManamaManama, Bahrain
    1927.6×
  17. 17Grants PassOregon, United States
    1917.5×
  18. 18BendOregon, United States
    1877.2×
  19. 19The DallesOregon, United States
    1826.6×
  20. 20Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1644.9×
  21. 21CoyhaiqueAysén, Chile
    1634.8×
  22. 22MedfordOregon, United States
    1624.7×
  23. 23Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1574.3×
  24. 24IlindenIlinden, North Macedonia
    1574.3×
  25. 25SpokaneWashington, United States
    1564.2×
  26. 26Lahorelow-cost sensorsPunjab, Pakistan
    1564.1×
  27. 27Islamabadlow-cost sensorsIslamabad, Pakistan
    1533.9×
  28. 28IssaquahWashington, United States
    1533.9×
  29. 29AuburnWashington, United States
    1513.7×
  30. 30LewistonIdaho, United States
    1493.7×
  31. 31CranbrookBritish Columbia, Canada
    1483.6×
  32. 32DushanbeDushanbe, Tajikistan
    1333.2×
  33. 33Dhakalow-cost sensorsDhaka Division, Bangladesh
    1303.2×
  34. 34AlexandriaAlexandria, Egypt
    1212.9×
  35. 35JakartaJakarta, Indonesia
    1202.9×
  36. 36AshlandOregon, United States
    1192.9×
  37. 37SquamishBritish Columbia, Canada
    1192.9×
  38. 38Coeur d'AleneIdaho, United States
    1152.7×
  39. 39SarajevoFederation of B&H, Bosnia and Herzegovina
    1132.7×
  40. 40CatañoCataño, Puerto Rico
    1112.6×
  41. 41Spokane ValleyWashington, United States
    1102.6×
  42. 42JeddahMecca Region, Saudi Arabia
    1082.6×
  43. 43KigaliKigali, Rwanda
    1072.5×
  44. 44Addis AbabaAddis Ababa, Ethiopia
    1032.4×
  45. 45OsornoLos Lagos Region, Chile
    992.3×
  46. 46AntananarivoAnalamanga, Madagascar
    992.3×
  47. 47Puerto AysénAysén, Chile
    972.3×
  48. 47Ciudad JuárezChihuahua, Mexico
    972.3×
  49. 49DelhiDelhi, India
    932.1×
  50. 50Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    922.1×
  51. 51PristinaPristina, Kosovo
    922.1×
  52. 52Columbia CityWashington, United States
    902.0×
  53. 53La UniónLos Ríos Region, Chile
    902.0×
  54. 54SenicaTrnava Region, Slovakia
    881.9×
  55. 54NacimientoBiobio, Chile
    881.9×
  56. 56University CityMissouri, United States
    881.9×
  57. 57CuranilahueBiobio, Chile
    871.9×
  58. 58MinamataKumamoto, Japan
    871.9×
  59. 59HanoiHanoi, Vietnam
    861.9×
  60. 60JolietIllinois, United States
    861.9×
  61. 61RentonWashington, United States
    861.9×
  62. 62Puerto VarasLos Lagos Region, Chile
    861.8×
  63. 63ChennaiTamil Nadu, India
    851.8×
  64. 64EugeneOregon, United States
    851.8×
  65. 65HumennéPrešov Region, Slovakia
    841.8×
  66. 66RengoO'Higgins Region, Chile
    841.8×
  67. 67ArnoldMissouri, United States
    841.8×
  68. 68Lexingtonlow-cost sensorsMassachusetts, United States
    841.8×
  69. 69Puerto MonttLos Lagos Region, Chile
    831.7×
  70. 70West MifflinPennsylvania, United States
    821.7×
  71. 71JesiThe Marches, Italy
    821.7×
  72. 72St. LouisMissouri, United States
    811.7×
  73. 72RoseburgOregon, United States
    811.7×
  74. 74SliemaTas-Sliema, Malta
    801.6×
  75. 75HollandMichigan, United States
    801.6×
  76. 75ChilliwackBritish Columbia, Canada
    801.6×
  77. 77MostaIl-Mosta, Malta
    801.6×
  78. 77Calumet CityIllinois, United States
    801.6×
  79. 79MolineIllinois, United States
    791.6×
  80. 80North VancouverBritish Columbia, Canada
    791.6×
  81. 81PrešovPrešov Region, Slovakia
    791.6×
  82. 81SaskatoonSaskatchewan, Canada
    791.6×
  83. 83CantonOhio, United States
    791.6×
  84. 84DallasTexas, United States
    781.6×
  85. 84East ChicagoIndiana, United States
    781.6×
  86. 84ShorelineWashington, United States
    781.6×
  87. 87CopiapóAtacama, Chile
    781.6×
  88. 87AntofagastaAntofagasta, Chile
    781.6×
  89. 87SeattleWashington, United States
    781.6×
  90. 90BakuBaki, Azerbaijan
    781.6×
  91. 91East Saint LouisIllinois, United States
    781.6×
  92. 91BellevueWashington, United States
    781.6×
  93. 93BirminghamAlabama, United States
    781.6×
  94. 93ClintonIowa, United States
    781.6×
  95. 93TacomaWashington, United States
    781.6×
  96. 96Vranov nad TopľouPrešov Region, Slovakia
    771.6×
  97. 97NairobiNairobi County, Kenya
    771.5×
  98. 97HyderabadTelangana, India
    771.5×
  99. 97NitraNitra Region, Slovakia
    771.5×
  100. 97Falconara MarittimaThe Marches, Italy
    771.5×
  101. 97DavenportIowa, United States
    771.5×
  102. 102Franklin ParkIllinois, United States
    771.5×
  103. 103Samut SakhonSamut Sakhon, Thailand
    761.5×
  104. 104SninaPrešov Region, Slovakia
    761.5×
  105. 104BremertonWashington, United States
    761.5×
  106. 106CoronelBiobio, Chile
    761.5×
  107. 106Little RockArkansas, United States
    761.5×
  108. 106RochesterMinnesota, United States
    761.5×
  109. 106WilkinsburgPennsylvania, United States
    761.5×
  110. 106EdmontonAlberta, Canada
    761.5×
  111. 111NaplesCampania, Italy
    751.5×
  112. 112HonmachiKumamoto, Japan
    751.5×
  113. 112SantiagoSantiago Metropolitan, Chile
    751.5×
  114. 112KalamazooMichigan, United States
    751.5×
  115. 112Prince AlbertSaskatchewan, Canada
    751.5×
  116. 116BratislavaBratislava Region, Slovakia
    751.5×
  117. 116ModugnoApulia, Italy
    751.5×
  118. 116ParklandWashington, United States
    751.5×
  119. 119BensalemPennsylvania, United States
    751.5×
  120. 120AricaArica y Parinacota Region, Chile
    751.5×
  121. 121ValdiviaLos Ríos Region, Chile
    741.4×
  122. 122ShenyangLiaoning, China
    741.4×
  123. 122ReginaSaskatchewan, Canada
    741.4×
  124. 124North CharlestonSouth Carolina, United States
    741.4×
  125. 125JenisonMichigan, United States
    741.4×
  126. 126Grand RapidsMichigan, United States
    741.4×
  127. 127ShakopeeMinnesota, United States
    731.4×
  128. 127Grande PrairieAlberta, Canada
    731.4×
  129. 129BelgradeCentral Serbia, Serbia
    731.4×
  130. 129LemayMissouri, United States
    731.4×
  131. 129Prince GeorgeBritish Columbia, Canada
    731.4×
  132. 129West VancouverBritish Columbia, Canada
    731.4×
  133. 133Kempten (Allgäu)Bavaria, Germany
    731.4×
  134. 133NewarkDelaware, United States
    731.4×
  135. 133Fort WorthTexas, United States
    731.4×
  136. 133MuscatineIowa, United States
    731.4×
  137. 133HammondIndiana, United States
    731.4×
  138. 133South BendIndiana, United States
    731.4×
  139. 133BurnsvilleMinnesota, United States
    731.4×
  140. 140TrnavaTrnava Region, Slovakia
    721.4×
  141. 141NorthbrookIllinois, United States
    721.4×
  142. 141PortlandMaine, United States
    721.4×
  143. 141WarrenOhio, United States
    721.4×
  144. 144Spišská Nová VesKošice Region, Slovakia
    721.4×
  145. 144Hradec KrálovéHradec Králové Region, Czechia
    721.4×
  146. 144Banja LukaSrpska, Bosnia and Herzegovina
    721.4×
  147. 144ToledoOhio, United States
    721.4×
  148. 144UkiahCalifornia, United States
    721.4×
  149. 149Abujalow-cost sensorsFCT, Nigeria
    721.3×
  150. 150SavannahGeorgia, United States
    711.3×
  151. 150Des PlainesIllinois, United States
    711.3×
  152. 152ShreveportLouisiana, United States
    711.3×
  153. 152DentonTexas, United States
    711.3×
  154. 152Swift CurrentSaskatchewan, Canada
    711.3×
  155. 155PeoriaIllinois, United States
    711.3×
  156. 155HempsteadNew York, United States
    711.3×
  157. 155PittsburghPennsylvania, United States
    711.3×
  158. 158ŽilinaŽilina Region, Slovakia
    711.3×
  159. 158MartinŽilina Region, Slovakia
    711.3×
  160. 158Alto HospicioTarapacá, Chile
    711.3×
  161. 158ElizabethNew Jersey, United States
    711.3×
  162. 162TalaganteSantiago Metropolitan, Chile
    711.3×
  163. 162RockfordIllinois, United States
    711.3×
  164. 162TrentonNew Jersey, United States
    711.3×
  165. 162YoungstownOhio, United States
    711.3×
  166. 166KasaokaOkayama, Japan
    711.3×
  167. 166PartizánskeTrenčín Region, Slovakia
    711.3×
  168. 166KladnoCentral Bohemia, Czechia
    711.3×
  169. 166SalernoCampania, Italy
    711.3×
  170. 166Saint MichaelMinnesota, United States
    711.3×
  171. 171AnkenyIowa, United States
    701.3×
  172. 171PortageIndiana, United States
    701.3×
  173. 173ObitaNagasaki, Japan
    701.3×
  174. 174KošiceKošice Region, Slovakia
    701.3×
  175. 174MostÚstí nad Labem Region, Czechia
    701.3×
  176. 174QuillotaValparaiso, Chile
    701.3×
  177. 174CelayaGuanajuato, Mexico
    701.3×
  178. 174WindsorOntario, Canada
    701.3×
  179. 179TemucoAraucania, Chile
    701.3×
  180. 179PhiladelphiaPennsylvania, United States
    701.3×
  181. 179GaryIndiana, United States
    701.3×
  182. 179SayamaOsaka, Japan
    701.3×
  183. 183Terre HauteIndiana, United States
    701.3×
  184. 184BellinzonaTicino, Switzerland
    691.3×
  185. 184SpringdaleArkansas, United States
    691.3×
  186. 184NorwoodOhio, United States
    691.3×
  187. 184DuncanBritish Columbia, Canada
    691.3×
  188. 188ŻabbarĦaż-Żabbar, Malta
    691.3×
  189. 188NurembergBavaria, Germany
    691.3×
  190. 188Ponte Vedra BeachFlorida, United States
    691.3×
  191. 188RichmondCalifornia, United States
    691.3×
  192. 192IyoEhime, Japan
    691.3×
  193. 192BerounCentral Bohemia, Czechia
    691.3×
  194. 192Puente AltoSantiago Metropolitan, Chile
    691.3×
  195. 192ElkhartIndiana, United States
    691.3×
  196. 192DearbornMichigan, United States
    691.3×
  197. 192Apple ValleyMinnesota, United States
    691.3×
  198. 192New BrunswickNew Jersey, United States
    691.3×
  199. 199PesaroThe Marches, Italy
    691.2×
  200. 199TexarkanaTexas, United States
    691.2×

Top 200 of 1,665 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, 2023, smogrank.com/history/2023-08-21 (accessed 2 Oct 2026).

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