SmogRank / History / July 21, 2024

Most polluted cities on July 21, 2024

2,173 cities ranked by their average PM2.5 over the day; the worst was Prince Albert, Canada, at 203.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during July 21, 2024. All episodes.

← Prince Albert 203.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for July 21, 2024, 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. 1Prince AlbertSaskatchewan, Canada
    27813.5×
  2. 2Fort McMurrayAlberta, Canada
    25612.1×
  3. 3SaskatoonSaskatchewan, Canada
    23810.9×
  4. 4OsornoLos Lagos Region, Chile
    2159.3×
  5. 5Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    2018.4×
  6. 6TalcaMaule Region, Chile
    1715.6×
  7. 7CuricóMaule Region, Chile
    1705.5×
  8. 8Puerto VarasLos Lagos Region, Chile
    1705.5×
  9. 9HualquiBiobio, Chile
    1705.5×
  10. 10Puerto AysénAysén, Chile
    1705.5×
  11. 11TemucoAraucania, Chile
    1695.4×
  12. 12La UniónLos Ríos Region, Chile
    1665.1×
  13. 13TalcahuanoBiobio, Chile
    1655.0×
  14. 14ChillánÑuble, Chile
    1644.9×
  15. 15NacimientoBiobio, Chile
    1644.9×
  16. 16RengoO'Higgins Region, Chile
    1624.7×
  17. 17RancaguaO'Higgins Region, Chile
    1624.7×
  18. 18Lahorelow-cost sensorsPunjab, Pakistan
    1604.6×
  19. 19CoronelBiobio, Chile
    1584.3×
  20. 20ChiguayanteBiobio, Chile
    1564.2×
  21. 21Fort St. JohnBritish Columbia, Canada
    1554.0×
  22. 22QuilpuéValparaiso, Chile
    1544.0×
  23. 23Grande PrairieAlberta, Canada
    1533.9×
  24. 24Kampalalow-cost sensorsCentral Region, Uganda
    1523.8×
  25. 25EdmontonAlberta, Canada
    1523.8×
  26. 26ConcepciónBiobio, Chile
    1513.7×
  27. 27Puerto MonttLos Lagos Region, Chile
    1483.6×
  28. 28SantiagoSantiago Metropolitan, Chile
    1443.5×
  29. 29Medicine HatAlberta, Canada
    1413.4×
  30. 30CauquenesMaule Region, Chile
    1393.4×
  31. 31ToméBiobio, Chile
    1353.3×
  32. 32ReginaSaskatchewan, Canada
    1353.3×
  33. 33Rapid CitySouth Dakota, United States
    1353.3×
  34. 34AntananarivoAnalamanga, Madagascar
    1323.2×
  35. 35Puente AltoSantiago Metropolitan, Chile
    1303.1×
  36. 36CoyhaiqueAysén, Chile
    1283.1×
  37. 37AltamontOregon, United States
    1253.0×
  38. 38TalaganteSantiago Metropolitan, Chile
    1212.9×
  39. 39CuranilahueBiobio, Chile
    1202.9×
  40. 40San Pedro de la PazBiobio, Chile
    1202.9×
  41. 41QuillotaValparaiso, Chile
    1182.8×
  42. 42ValdiviaLos Ríos Region, Chile
    1162.8×
  43. 43Great FallsMontana, United States
    1152.7×
  44. 44LotaBiobio, Chile
    1142.7×
  45. 45Red DeerAlberta, Canada
    1092.6×
  46. 46Prince GeorgeBritish Columbia, Canada
    1072.5×
  47. 47VillarricaAraucania, Chile
    1072.5×
  48. 48DelhiDelhi, India
    1042.5×
  49. 49St. AlbertAlberta, Canada
    1032.4×
  50. 50Islamabadlow-cost sensorsIslamabad, Pakistan
    1022.4×
  51. 51LimaLima Province, Peru
    972.3×
  52. 52BeijingBeijing, China
    962.2×
  53. 53QuinteroValparaiso, Chile
    962.2×
  54. 54São PauloSão Paulo, Brazil
    942.1×
  55. 55Karachilow-cost sensorsSindh, Pakistan
    922.1×
  56. 56Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    922.1×
  57. 57Los ÁngelesBiobio, Chile
    902.0×
  58. 58Addis AbabaAddis Ababa, Ethiopia
    902.0×
  59. 58Santa Anita - Los FicusLima region, Peru
    902.0×
  60. 60Viña del MarValparaiso, Chile
    902.0×
  61. 61SarajevoFederation of B&H, Bosnia and Herzegovina
    892.0×
  62. 62Şabāḩ as SālimMubārak al Kabīr, Kuwait
    881.9×
  63. 63HanoiHanoi, Vietnam
    871.9×
  64. 64MitoIbaraki, Japan
    871.9×
  65. 65ManamaManama, Bahrain
    861.9×
  66. 65HelenaMontana, United States
    861.9×
  67. 65Swift CurrentSaskatchewan, Canada
    861.9×
  68. 68Asunciónlow-cost sensorsAsuncion, Paraguay
    851.8×
  69. 69ConcónValparaiso, Chile
    841.8×
  70. 70KamloopsBritish Columbia, Canada
    831.8×
  71. 71JakartaJakarta, Indonesia
    821.7×
  72. 72BucharestBucharest, Romania
    821.7×
  73. 72VernonBritish Columbia, Canada
    821.7×
  74. 74BendOregon, United States
    821.7×
  75. 75San Francisco De BorjaLima region, Peru
    811.7×
  76. 76AntofagastaAntofagasta, Chile
    791.6×
  77. 77ConroeTexas, United States
    781.6×
  78. 78KelownaBritish Columbia, Canada
    771.5×
  79. 79CallaoCallao, Peru
    761.5×
  80. 80DushanbeDushanbe, Tajikistan
    761.5×
  81. 80CalgaryAlberta, Canada
    761.5×
  82. 82Moses LakeWashington, United States
    761.5×
  83. 83MostÚstí nad Labem Region, Czechia
    761.5×
  84. 84RadomskoŁódź Voivodeship, Poland
    751.5×
  85. 85HokotaIbaraki, Japan
    751.5×
  86. 86ButteMontana, United States
    751.5×
  87. 87SereďTrnava Region, Slovakia
    751.5×
  88. 88KochiKochi, Japan
    741.4×
  89. 89ChocopeLa Libertad, Peru
    741.4×
  90. 89ChimboteAncash, Peru
    741.4×
  91. 91ShanghaiShanghai, China
    741.4×
  92. 92CoburgBavaria, Germany
    731.4×
  93. 92Villa Poeta José Gálvez BarrenecheaLima region, Peru
    731.4×
  94. 94KanchanaburiKanchanaburi, Thailand
    731.4×
  95. 95BorCentral Serbia, Serbia
    721.4×
  96. 95SpokaneWashington, United States
    721.4×
  97. 97NitraNitra Region, Slovakia
    721.4×
  98. 98AlgiersAlgiers, Algeria
    721.4×
  99. 99VelesVeles, North Macedonia
    721.3×
  100. 100IwadeWakayama, Japan
    711.3×
  101. 100La SerenaCoquimbo Region, Chile
    711.3×
  102. 102Yerevanlow-cost sensorsYerevan, Armenia
    711.3×
  103. 102CopiapóAtacama, Chile
    711.3×
  104. 102MissoulaMontana, United States
    711.3×
  105. 105SenecBratislava Region, Slovakia
    711.3×
  106. 106KomárnoNitra Region, Slovakia
    701.3×
  107. 107TetovoTetovo, North Macedonia
    701.3×
  108. 108GilletteWyoming, United States
    701.3×
  109. 109KraljevoCentral Serbia, Serbia
    701.3×
  110. 109AshlandOregon, United States
    701.3×
  111. 111MinatoWakayama, Japan
    691.3×
  112. 111Narutochō-mitsuishiTokushima, Japan
    691.3×
  113. 111KasamaIbaraki, Japan
    691.3×
  114. 111BartlettTennessee, United States
    691.3×
  115. 111ChikuseiIbaraki, Japan
    691.3×
  116. 116AkiKochi, Japan
    691.2×
  117. 117Nakhon RatchasimaNakhon Ratchasima, Thailand
    691.2×
  118. 117SenicaTrnava Region, Slovakia
    691.2×
  119. 117PezinokBratislava Region, Slovakia
    691.2×
  120. 120ŌtsukiYamanashi, Japan
    691.2×
  121. 120LitvínovÚstí nad Labem Region, Czechia
    691.2×
  122. 120KaliszGreater Poland, Poland
    691.2×
  123. 120LewistonIdaho, United States
    691.2×
  124. 120CranbrookBritish Columbia, Canada
    691.2×
  125. 125KragujevacCentral Serbia, Serbia
    681.2×
  126. 125SaikiOita, Japan
    681.2×
  127. 125TimaruCanterbury, New Zealand
    681.2×
  128. 128Kathmandulow-cost sensorsBagmati Province, Nepal
    681.2×
  129. 128ObamaFukui, Japan
    681.2×
  130. 130NobeokaMiyazaki, Japan
    681.2×
  131. 130Zielona GóraLubusz, Poland
    681.2×
  132. 130AyaseKanagawa, Japan
    681.2×
  133. 133KošiceKošice Region, Slovakia
    681.2×
  134. 133LazarevacCentral Serbia, Serbia
    681.2×
  135. 135IzumisanoOsaka, Japan
    671.2×
  136. 135IyoEhime, Japan
    671.2×
  137. 135Accralow-cost sensorsGreater Accra, Ghana
    671.2×
  138. 135YawatahamaEhime, Japan
    671.2×
  139. 135AridaWakayama, Japan
    671.2×
  140. 140TrebišovKošice Region, Slovakia
    671.2×
  141. 140KainanWakayama, Japan
    671.2×
  142. 142MiskolcBorsod-Abaúj-Zemplén, Hungary
    671.2×
  143. 142FujinomiyaShizuoka, Japan
    671.2×
  144. 142TrnavaTrnava Region, Slovakia
    671.2×
  145. 142NankokuKochi, Japan
    671.2×
  146. 146SmederevoCentral Serbia, Serbia
    671.2×
  147. 146Fort LauderdaleFlorida, United States
    671.2×
  148. 146PentictonBritish Columbia, Canada
    671.2×
  149. 149SakaiOsaka, Japan
    671.2×
  150. 149GobōWakayama, Japan
    671.2×
  151. 149IshiokaIbaraki, Japan
    671.2×
  152. 149DěčínÚstí nad Labem Region, Czechia
    671.2×
  153. 149Hitachi-NakaIbaraki, Japan
    671.2×
  154. 149MatsusakaMie, Japan
    671.2×
  155. 149MimaTokushima, Japan
    671.2×
  156. 156PrešovPrešov Region, Slovakia
    661.2×
  157. 156Novi PazarCentral Serbia, Serbia
    661.2×
  158. 156SusakiKochi, Japan
    661.2×
  159. 156NishinomiyaHyōgo, Japan
    661.2×
  160. 156Coeur d'AleneIdaho, United States
    661.2×
  161. 161KavadarciKavadarci, North Macedonia
    661.2×
  162. 161GostivarGostivar, North Macedonia
    661.2×
  163. 161KobeHyōgo, Japan
    661.2×
  164. 161BoiseIdaho, United States
    661.2×
  165. 161Spokane ValleyWashington, United States
    661.2×
  166. 161Saphan SungBangkok, Thailand
    661.2×
  167. 167TanabeWakayama, Japan
    661.1×
  168. 167PúchovTrenčín Region, Slovakia
    661.1×
  169. 167KadaňÚstí nad Labem Region, Czechia
    661.1×
  170. 167Belle GladeFlorida, United States
    661.1×
  171. 167West FargoNorth Dakota, United States
    661.1×
  172. 172KishiwadaOsaka, Japan
    661.1×
  173. 172MeridianIdaho, United States
    661.1×
  174. 174AshgabatAshgabat, Turkmenistan
    661.1×
  175. 174FujiShizuoka, Japan
    661.1×
  176. 174AnanTokushima, Japan
    661.1×
  177. 177Nong KhaemBangkok, Thailand
    661.1×
  178. 177AkashiHyōgo, Japan
    661.1×
  179. 177GyöngyösHeves County, Hungary
    661.1×
  180. 177AshburtonCanterbury, New Zealand
    661.1×
  181. 177KamisuIbaraki, Japan
    661.1×
  182. 182GotembaShizuoka, Japan
    651.1×
  183. 182PortageIndiana, United States
    651.1×
  184. 182TsuchiuraIbaraki, Japan
    651.1×
  185. 182Lat KrabangBangkok, Thailand
    651.1×
  186. 186Bang NaBangkok, Thailand
    651.1×
  187. 186OsakaOsaka, Japan
    651.1×
  188. 186InoKochi, Japan
    651.1×
  189. 186AmagasakiHyōgo, Japan
    651.1×
  190. 186TrenčínTrenčín Region, Slovakia
    651.1×
  191. 186CoquimboCoquimbo Region, Chile
    651.1×
  192. 186CalamaAntofagasta, Chile
    651.1×
  193. 193UžiceCentral Serbia, Serbia
    651.1×
  194. 193Saint CloudMinnesota, United States
    651.1×
  195. 195AsprópyrgosAttica, Greece
    651.1×
  196. 195ShimodaShizuoka, Japan
    651.1×
  197. 197HumennéPrešov Region, Slovakia
    651.1×
  198. 198BitolaBitola, North Macedonia
    641.1×
  199. 198NagahamaShiga, Japan
    641.1×
  200. 198Jurong WestSingapore
    641.1×

Top 200 of 2,173 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

Not covered: the government monitoring networks of China and Turkey, which publish no terms that let us reuse their readings. Most cities there are missing from this board, not clean. Why.

Use this board

SmogRank, most polluted cities, PM2.5, July 21, 2024, smogrank.com/history/2024-07-21 (accessed 3 Oct 2026).

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