SmogRank / History / May 19, 2023

Most polluted cities on May 19, 2023

1,310 cities ranked by their average PM2.5 over the day; the worst was Grande Prairie, Canada, at 343.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during May 19, 2023. All episodes.

← Grande Prairie 343.0 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every city ranked for May 19, 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. 1Grande PrairieAlberta, Canada
    500+22.9×
  2. 2Fort St. JohnBritish Columbia, Canada
    29814.9×
  3. 3EdmontonAlberta, Canada
    1846.8×
  4. 4LongmontColorado, United States
    1786.3×
  5. 5NacimientoBiobio, Chile
    1776.2×
  6. 6Ken CarylColorado, United States
    1745.9×
  7. 7ThorntonColorado, United States
    1715.6×
  8. 8DenverColorado, United States
    1715.6×
  9. 9ChillánÑuble, Chile
    1705.5×
  10. 10San CarlosÑuble, Chile
    1705.5×
  11. 11St. AlbertAlberta, Canada
    1675.2×
  12. 12HelenaMontana, United States
    1644.9×
  13. 13Dhakalow-cost sensorsDhaka Division, Bangladesh
    1634.8×
  14. 14OsornoLos Lagos Region, Chile
    1634.8×
  15. 15Lahorelow-cost sensorsPunjab, Pakistan
    1624.7×
  16. 16GreeleyColorado, United States
    1614.7×
  17. 17BoulderColorado, United States
    1614.6×
  18. 18Sherwood ParkAlberta, Canada
    1594.5×
  19. 19Puerto VarasLos Lagos Region, Chile
    1584.4×
  20. 20CheyenneWyoming, United States
    1574.3×
  21. 21TalcahuanoBiobio, Chile
    1564.2×
  22. 22HualquiBiobio, Chile
    1554.1×
  23. 23LinaresMaule Region, Chile
    1544.0×
  24. 24Los ÁngelesBiobio, Chile
    1533.9×
  25. 25DelhiDelhi, India
    1523.8×
  26. 26JakartaJakarta, Indonesia
    1523.8×
  27. 27Fort McMurrayAlberta, Canada
    1523.8×
  28. 28Fort CollinsColorado, United States
    1463.6×
  29. 29TalcaMaule Region, Chile
    1463.6×
  30. 30HanoiHanoi, Vietnam
    1413.5×
  31. 31HyderabadTelangana, India
    1413.5×
  32. 32BaghdadBaghdad, Iraq
    1403.4×
  33. 33Puerto MonttLos Lagos Region, Chile
    1353.3×
  34. 33Colorado SpringsColorado, United States
    1353.3×
  35. 35CoyhaiqueAysén, Chile
    1353.3×
  36. 36LaramieWyoming, United States
    1343.3×
  37. 37CauquenesMaule Region, Chile
    1333.2×
  38. 38CuranilahueBiobio, Chile
    1323.2×
  39. 39AirdrieAlberta, Canada
    1303.2×
  40. 40CuricóMaule Region, Chile
    1303.1×
  41. 41CoronelBiobio, Chile
    1293.1×
  42. 42ButteMontana, United States
    1283.1×
  43. 43ChiguayanteBiobio, Chile
    1243.0×
  44. 44ToméBiobio, Chile
    1243.0×
  45. 45AntananarivoAnalamanga, Madagascar
    1233.0×
  46. 46La UniónLos Ríos Region, Chile
    1202.9×
  47. 47KigaliKigali, Rwanda
    1182.8×
  48. 48Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1172.8×
  49. 48Tha BoNong Khai, Thailand
    1172.8×
  50. 50BeijingBeijing, China
    1152.8×
  51. 51Great FallsMontana, United States
    1152.7×
  52. 52ConcepciónBiobio, Chile
    1152.7×
  53. 53RengoO'Higgins Region, Chile
    1132.7×
  54. 54San Pedro de la PazBiobio, Chile
    1122.7×
  55. 55León de los AldamaGuanajuato, Mexico
    1082.6×
  56. 56LethbridgeAlberta, Canada
    1072.5×
  57. 57MissoulaMontana, United States
    1062.5×
  58. 58Kampalalow-cost sensorsCentral Region, Uganda
    1052.5×
  59. 58TalaganteSantiago Metropolitan, Chile
    1052.5×
  60. 60RancaguaO'Higgins Region, Chile
    1042.5×
  61. 60Puerto AysénAysén, Chile
    1042.5×
  62. 62CasperWyoming, United States
    1042.4×
  63. 63Rock SpringsWyoming, United States
    1032.4×
  64. 64SantiagoSantiago Metropolitan, Chile
    1032.4×
  65. 65LewistonIdaho, United States
    992.3×
  66. 66QuillotaValparaiso, Chile
    992.3×
  67. 67QuinteroValparaiso, Chile
    982.3×
  68. 67Red DeerAlberta, Canada
    982.3×
  69. 69Addis AbabaAddis Ababa, Ethiopia
    982.3×
  70. 69CelayaGuanajuato, Mexico
    982.3×
  71. 71GuangzhouGuangdong, China
    972.3×
  72. 72ManamaManama, Bahrain
    962.2×
  73. 73DushanbeDushanbe, Tajikistan
    942.1×
  74. 74Puente AltoSantiago Metropolitan, Chile
    932.1×
  75. 75KolkataWest Bengal, India
    932.1×
  76. 75SalamancaGuanajuato, Mexico
    932.1×
  77. 75BozemanMontana, United States
    932.1×
  78. 78ConcónValparaiso, Chile
    912.0×
  79. 79ValdiviaLos Ríos Region, Chile
    912.0×
  80. 80RexburgIdaho, United States
    902.0×
  81. 81Khlong LuangPathum Thani, Thailand
    902.0×
  82. 82Silao de la VictoriaGuanajuato, Mexico
    892.0×
  83. 83Nong KhaemBangkok, Thailand
    892.0×
  84. 84ChennaiTamil Nadu, India
    881.9×
  85. 85Idaho FallsIdaho, United States
    881.9×
  86. 86Medicine HatAlberta, Canada
    881.9×
  87. 87BangkokBangkok, Thailand
    871.9×
  88. 88CoquimboCoquimbo Region, Chile
    871.9×
  89. 89Viña del MarValparaiso, Chile
    861.9×
  90. 90NorthbrookIllinois, United States
    851.8×
  91. 91GuanajuatoGuanajuato, Mexico
    841.8×
  92. 92WichitaKansas, United States
    841.8×
  93. 93Iowa CityIowa, United States
    841.8×
  94. 94PristinaPristina, Kosovo
    841.8×
  95. 95Samut PrakanSamut Prakan, Thailand
    831.8×
  96. 96Bang KapiBangkok, Thailand
    831.8×
  97. 96Bang Bo DistrictSamut Prakan, Thailand
    831.8×
  98. 98Kathmandulow-cost sensorsBagmati Province, Nepal
    831.8×
  99. 99Des PlainesIllinois, United States
    831.7×
  100. 100Islamabadlow-cost sensorsIslamabad, Pakistan
    821.7×
  101. 100Phra PradaengSamut Prakan, Thailand
    821.7×
  102. 102RabinalBaja Verapaz, Guatemala
    821.7×
  103. 102Guatemala CityGuatemala, Guatemala
    821.7×
  104. 102CaryIllinois, United States
    821.7×
  105. 105CalgaryAlberta, Canada
    821.7×
  106. 106MadisonWisconsin, United States
    821.7×
  107. 107Mueang NonthaburiNonthaburi, Thailand
    811.7×
  108. 107La SerenaCoquimbo Region, Chile
    811.7×
  109. 107PullmanWashington, United States
    811.7×
  110. 110MilwaukeeWisconsin, United States
    811.7×
  111. 111TocopillaAntofagasta, Chile
    811.7×
  112. 112WaukeshaWisconsin, United States
    811.7×
  113. 112AmarilloTexas, United States
    811.7×
  114. 114Prince GeorgeBritish Columbia, Canada
    801.7×
  115. 115Grand IslandNebraska, United States
    801.7×
  116. 116DerbyKansas, United States
    801.6×
  117. 116Calumet CityIllinois, United States
    801.6×
  118. 118South MilwaukeeWisconsin, United States
    801.6×
  119. 118Rapid CitySouth Dakota, United States
    801.6×
  120. 120East Saint LouisIllinois, United States
    801.6×
  121. 121ZionIllinois, United States
    791.6×
  122. 122SheridanWyoming, United States
    791.6×
  123. 123LotaBiobio, Chile
    791.6×
  124. 124East ChicagoIndiana, United States
    791.6×
  125. 124Twin FallsIdaho, United States
    791.6×
  126. 124SpokaneWashington, United States
    791.6×
  127. 124SunnysideWashington, United States
    791.6×
  128. 128ClintonIowa, United States
    781.6×
  129. 129KalamazooMichigan, United States
    781.6×
  130. 130Nakhon PathomNakhon Pathom, Thailand
    781.6×
  131. 130TemucoAraucania, Chile
    781.6×
  132. 130BillingsMontana, United States
    781.6×
  133. 130GilletteWyoming, United States
    781.6×
  134. 134MoscowIdaho, United States
    781.6×
  135. 135NapervilleIllinois, United States
    771.6×
  136. 136OlatheKansas, United States
    771.5×
  137. 137Mexico CityMexico City, Mexico
    771.5×
  138. 137St. LouisMissouri, United States
    771.5×
  139. 137RockfordIllinois, United States
    771.5×
  140. 140SpringfieldIllinois, United States
    771.5×
  141. 140Franklin ParkIllinois, United States
    771.5×
  142. 140Grand RapidsMichigan, United States
    771.5×
  143. 140JenisonMichigan, United States
    771.5×
  144. 144Granite CityIllinois, United States
    761.5×
  145. 144CranbrookBritish Columbia, Canada
    761.5×
  146. 146North OgdenUtah, United States
    761.5×
  147. 147YangonYangon, Myanmar
    761.5×
  148. 147AricaArica y Parinacota Region, Chile
    761.5×
  149. 147AbasoloGuanajuato, Mexico
    761.5×
  150. 147Moses LakeWashington, United States
    761.5×
  151. 147La Crescenta-Montroselow-cost sensorsCalifornia, United States
    761.5×
  152. 152MolineIllinois, United States
    751.5×
  153. 153SalorTashkent Region, Uzbekistan
    751.5×
  154. 153JolietIllinois, United States
    751.5×
  155. 155DecaturIllinois, United States
    741.4×
  156. 155PeoriaIllinois, United States
    741.4×
  157. 157Samut SakhonSamut Sakhon, Thailand
    741.4×
  158. 157CopiapóAtacama, Chile
    741.4×
  159. 157La CrosseWisconsin, United States
    741.4×
  160. 160NišCentral Serbia, Serbia
    741.4×
  161. 160DavenportIowa, United States
    741.4×
  162. 160BellevueNebraska, United States
    741.4×
  163. 163IrapuatoGuanajuato, Mexico
    741.4×
  164. 163IndianapolisIndiana, United States
    741.4×
  165. 163Kansas CityKansas, United States
    741.4×
  166. 163Walla WallaWashington, United States
    741.4×
  167. 167HammondIndiana, United States
    741.4×
  168. 167LincolnNebraska, United States
    741.4×
  169. 169TopekaKansas, United States
    731.4×
  170. 169HermistonOregon, United States
    731.4×
  171. 169Spokane ValleyWashington, United States
    731.4×
  172. 169HamiltonOntario, Canada
    731.4×
  173. 173GaryIndiana, United States
    721.4×
  174. 174BakuBaki, Azerbaijan
    721.4×
  175. 174KrefeldNorth Rhine-Westphalia, Germany
    721.4×
  176. 174TexarkanaTexas, United States
    721.4×
  177. 177Prince AlbertSaskatchewan, Canada
    721.4×
  178. 178WenatcheeWashington, United States
    721.3×
  179. 179AntofagastaAntofagasta, Chile
    711.3×
  180. 179Ciudad JuárezChihuahua, Mexico
    711.3×
  181. 179BloomingtonIllinois, United States
    711.3×
  182. 179BanningCalifornia, United States
    711.3×
  183. 183ChicagoIllinois, United States
    711.3×
  184. 183CondaIdaho, United States
    711.3×
  185. 185TulsaOklahoma, United States
    701.3×
  186. 185PortageIndiana, United States
    701.3×
  187. 187AppletonWisconsin, United States
    701.3×
  188. 188Swift CurrentSaskatchewan, Canada
    701.3×
  189. 189Hradec KrálovéHradec Králové Region, Czechia
    701.3×
  190. 189San Miguel de AllendeGuanajuato, Mexico
    701.3×
  191. 189LemayMissouri, United States
    701.3×
  192. 189University CityMissouri, United States
    701.3×
  193. 189RedfordMichigan, United States
    701.3×
  194. 194FontanaCalifornia, United States
    701.3×
  195. 195Santa ClaritaCalifornia, United States
    691.3×
  196. 195Coeur d'AleneIdaho, United States
    691.3×
  197. 197ArnoldMissouri, United States
    691.3×
  198. 197Tri-CitiesWashington, United States
    691.3×
  199. 199ParadiseCalifornia, United States
    691.2×
  200. 200TijuanaBaja California, Mexico
    691.2×

Top 200 of 1,310 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, May 19, 2023, smogrank.com/history/2023-05-19 (accessed 2 Oct 2026).

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