SmogRank / History / June 4, 2023

Most polluted cities on June 4, 2023

1,540 cities ranked by their average PM2.5 over the day; the worst was Baghdad, Iraq, at 338.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during June 4, 2023. All episodes.

← Baghdad 338.0 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every city ranked for June 4, 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. 1BaghdadBaghdad, Iraq
    500+22.5×
  2. 2Rouyn-NorandaQuebec, Canada
    29314.5×
  3. 3BloemfonteinFree State, South Africa
    2109.0×
  4. 4NacimientoBiobio, Chile
    1856.9×
  5. 5TlaquepaqueJalisco, Mexico
    1695.4×
  6. 6AppletonWisconsin, United States
    1685.3×
  7. 7HualpénBiobio, Chile
    1675.3×
  8. 8ThembisaGauteng, South Africa
    1675.2×
  9. 9Green BayWisconsin, United States
    1655.1×
  10. 10OsornoLos Lagos Region, Chile
    1634.9×
  11. 11Dhakalow-cost sensorsDhaka Division, Bangladesh
    1634.8×
  12. 12Puerto VarasLos Lagos Region, Chile
    1584.4×
  13. 13MarikanaNorth West, South Africa
    1584.3×
  14. 14La UniónLos Ríos Region, Chile
    1554.1×
  15. 15EtwatwaGauteng, South Africa
    1533.9×
  16. 16BritsNorth West, South Africa
    1533.9×
  17. 17TalcahuanoBiobio, Chile
    1533.9×
  18. 18DelhiDelhi, India
    1533.9×
  19. 19TemucoAraucania, Chile
    1523.8×
  20. 20BrakpanGauteng, South Africa
    1523.8×
  21. 21CoyhaiqueAysén, Chile
    1513.7×
  22. 22Eau ClaireWisconsin, United States
    1453.6×
  23. 23TokozaGauteng, South Africa
    1453.6×
  24. 24CuranilahueBiobio, Chile
    1443.5×
  25. 25ValdiviaLos Ríos Region, Chile
    1433.5×
  26. 26Lahorelow-cost sensorsPunjab, Pakistan
    1423.5×
  27. 27San CarlosÑuble, Chile
    1413.4×
  28. 27PeterboroughOntario, Canada
    1413.4×
  29. 29KolkataWest Bengal, India
    1413.4×
  30. 30Ga-RankuwaNorth West, South Africa
    1403.4×
  31. 31SantiagoSantiago Metropolitan, Chile
    1393.4×
  32. 32CoronelBiobio, Chile
    1373.3×
  33. 33ChillánÑuble, Chile
    1353.3×
  34. 34Los ÁngelesBiobio, Chile
    1343.3×
  35. 35TalaganteSantiago Metropolitan, Chile
    1263.0×
  36. 36JohannesburgGauteng, South Africa
    1253.0×
  37. 37Puente AltoSantiago Metropolitan, Chile
    1222.9×
  38. 37MadisonWisconsin, United States
    1222.9×
  39. 39MilwaukeeWisconsin, United States
    1222.9×
  40. 40CauquenesMaule Region, Chile
    1212.9×
  41. 41WaukeshaWisconsin, United States
    1202.9×
  42. 42Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1172.8×
  43. 43ToméBiobio, Chile
    1172.8×
  44. 44JakartaJakarta, Indonesia
    1152.7×
  45. 45South MilwaukeeWisconsin, United States
    1112.6×
  46. 46HanoiHanoi, Vietnam
    1062.5×
  47. 46Puerto MonttLos Lagos Region, Chile
    1062.5×
  48. 48RengoO'Higgins Region, Chile
    1042.4×
  49. 49ZionIllinois, United States
    1032.4×
  50. 50QuillotaValparaiso, Chile
    1032.4×
  51. 51KigaliKigali, Rwanda
    1022.4×
  52. 52RockfordIllinois, United States
    1012.4×
  53. 53LinaresMaule Region, Chile
    982.3×
  54. 54DushanbeDushanbe, Tajikistan
    972.3×
  55. 55Puerto AysénAysén, Chile
    972.2×
  56. 56QuinteroValparaiso, Chile
    962.2×
  57. 57San Pedro de la PazBiobio, Chile
    962.2×
  58. 58HyderabadTelangana, India
    962.2×
  59. 59LimaLima Province, Peru
    952.2×
  60. 60RancaguaO'Higgins Region, Chile
    952.2×
  61. 60DecaturIllinois, United States
    952.2×
  62. 62CelayaGuanajuato, Mexico
    952.2×
  63. 63ClintonIowa, United States
    942.1×
  64. 64BloomingtonIllinois, United States
    912.0×
  65. 65Islamabadlow-cost sensorsIslamabad, Pakistan
    912.0×
  66. 66ChennaiTamil Nadu, India
    902.0×
  67. 67JeffersonvilleIndiana, United States
    902.0×
  68. 68EmalahleniMpumalanga, South Africa
    902.0×
  69. 69ConcepciónBiobio, Chile
    902.0×
  70. 70MolineIllinois, United States
    892.0×
  71. 71Santa Anita - Los FicusLima region, Peru
    892.0×
  72. 72HualquiBiobio, Chile
    892.0×
  73. 72AntofagastaAntofagasta, Chile
    892.0×
  74. 74CoquimboCoquimbo Region, Chile
    881.9×
  75. 75Grand RapidsMichigan, United States
    881.9×
  76. 76RochesterMinnesota, United States
    881.9×
  77. 76SaguenayQuebec, Canada
    881.9×
  78. 78ChiguayanteBiobio, Chile
    871.9×
  79. 79JenisonMichigan, United States
    861.9×
  80. 80Valley StationKentucky, United States
    861.8×
  81. 81ThabazimbiLimpopo, South Africa
    851.8×
  82. 81NapervilleIllinois, United States
    851.8×
  83. 83JeddahMecca Region, Saudi Arabia
    851.8×
  84. 84DavenportIowa, United States
    851.8×
  85. 85TocopillaAntofagasta, Chile
    841.8×
  86. 85SpringfieldIllinois, United States
    841.8×
  87. 87LouisvilleKentucky, United States
    841.8×
  88. 88NorthbrookIllinois, United States
    841.8×
  89. 89São PauloSão Paulo, Brazil
    831.8×
  90. 90La SerenaCoquimbo Region, Chile
    831.8×
  91. 90CuricóMaule Region, Chile
    831.8×
  92. 92MukdahanMukdahan, Thailand
    831.7×
  93. 92CaryIllinois, United States
    831.7×
  94. 92Hacienda Santa FeJalisco, Mexico
    831.7×
  95. 95Saint MatthewsKentucky, United States
    831.7×
  96. 96BloomingtonIndiana, United States
    821.7×
  97. 97Karachilow-cost sensorsSindh, Pakistan
    821.7×
  98. 98JeffersontownKentucky, United States
    821.7×
  99. 99HartbeespoortNorth West, South Africa
    821.7×
  100. 99CopiapóAtacama, Chile
    821.7×
  101. 101UttaraditUttaradit, Thailand
    811.7×
  102. 102Des PlainesIllinois, United States
    811.7×
  103. 103KitchenerOntario, Canada
    801.7×
  104. 104JolietIllinois, United States
    801.6×
  105. 105HollandMichigan, United States
    791.6×
  106. 106PhetchabunPhetchabun, Thailand
    781.6×
  107. 106TalcaMaule Region, Chile
    781.6×
  108. 108ErmeloMpumalanga, South Africa
    781.6×
  109. 109NorwoodOhio, United States
    771.6×
  110. 110PhraePhrae, Thailand
    771.5×
  111. 111SalorTashkent Region, Uzbekistan
    771.5×
  112. 111GuangzhouGuangdong, China
    771.5×
  113. 111EvansvilleIndiana, United States
    771.5×
  114. 114Viña del MarValparaiso, Chile
    771.5×
  115. 114ConcónValparaiso, Chile
    771.5×
  116. 116Nakhon RatchasimaNakhon Ratchasima, Thailand
    771.5×
  117. 117Udon ThaniUdon Thani, Thailand
    761.5×
  118. 118Jurong WestSingapore
    761.5×
  119. 119LampangLampang, Thailand
    751.5×
  120. 120Kathmandulow-cost sensorsBagmati Province, Nepal
    751.5×
  121. 120OwensboroKentucky, United States
    751.5×
  122. 122NanNan, Thailand
    751.5×
  123. 122East Saint LouisIllinois, United States
    751.5×
  124. 124BuffaloNew York, United States
    751.5×
  125. 125Fort ThomasKentucky, United States
    741.4×
  126. 125HernandoMississippi, United States
    741.4×
  127. 127SalamancaGuanajuato, Mexico
    741.4×
  128. 127ShakopeeMinnesota, United States
    741.4×
  129. 127SuperiorWisconsin, United States
    741.4×
  130. 130Guatemala CityGuatemala, Guatemala
    741.4×
  131. 130East ChicagoIndiana, United States
    741.4×
  132. 132BurnsvilleMinnesota, United States
    731.4×
  133. 133IndianapolisIndiana, United States
    731.4×
  134. 134MiddelburgMpumalanga, South Africa
    731.4×
  135. 134Fort-de-FranceMartinique, Martinique
    731.4×
  136. 134Iowa CityIowa, United States
    731.4×
  137. 134Calumet CityIllinois, United States
    731.4×
  138. 138DurangoBasque Country, Spain
    731.4×
  139. 138Alto HospicioTarapacá, Chile
    731.4×
  140. 138HammondIndiana, United States
    731.4×
  141. 141RabinalBaja Verapaz, Guatemala
    731.4×
  142. 142New AlbanyIndiana, United States
    721.4×
  143. 142Greater SudburyOntario, Canada
    721.4×
  144. 144Le LamentinMartinique, Martinique
    721.4×
  145. 144MiddletownOhio, United States
    721.4×
  146. 144MinneapolisMinnesota, United States
    721.4×
  147. 147CincinnatiOhio, United States
    721.3×
  148. 148Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    711.3×
  149. 148BirminghamAlabama, United States
    711.3×
  150. 148SpringdaleArkansas, United States
    711.3×
  151. 148LansingMichigan, United States
    711.3×
  152. 152NaplesCampania, Italy
    711.3×
  153. 152Saint PaulMinnesota, United States
    711.3×
  154. 154SasolburgFree State, South Africa
    711.3×
  155. 154MuscatineIowa, United States
    711.3×
  156. 156Le RobertMartinique, Martinique
    711.3×
  157. 156St. LouisMissouri, United States
    711.3×
  158. 156Franklin ParkIllinois, United States
    711.3×
  159. 156Apple ValleyMinnesota, United States
    711.3×
  160. 160PristinaPristina, Kosovo
    701.3×
  161. 160LotaBiobio, Chile
    701.3×
  162. 162FontanaCalifornia, United States
    701.3×
  163. 163LoeiLoei, Thailand
    701.3×
  164. 163BilbaoBasque Country, Spain
    701.3×
  165. 163ElizabethtownKentucky, United States
    701.3×
  166. 166Terre HauteIndiana, United States
    701.3×
  167. 167McKeesportPennsylvania, United States
    691.3×
  168. 168Mae SaiChiang Rai, Thailand
    691.3×
  169. 169KanchanaburiKanchanaburi, Thailand
    691.3×
  170. 170ChaiyaphumChaiyaphum, Thailand
    691.2×
  171. 171AricaArica y Parinacota Region, Chile
    691.2×
  172. 172Si Maha PhotPrachin Buri, Thailand
    681.2×
  173. 173VigoGalicia, Spain
    681.2×
  174. 173KenmoreNew York, United States
    681.2×
  175. 175SoshanguveGauteng, South Africa
    671.2×
  176. 175TexarkanaTexas, United States
    671.2×
  177. 177PhayaoPhayao, Thailand
    671.2×
  178. 178ChicagoIllinois, United States
    671.2×
  179. 178PittsburghPennsylvania, United States
    671.2×
  180. 180Ecatepec de MorelosMéxico, Mexico
    671.2×
  181. 180ColumbusIndiana, United States
    671.2×
  182. 182BakuBaki, Azerbaijan
    671.2×
  183. 183RatchaburiRatchaburi, Thailand
    661.2×
  184. 183Ubon RatchathaniUbon Ratchathani, Thailand
    661.2×
  185. 183Bang NaBangkok, Thailand
    661.2×
  186. 183DuluthMinnesota, United States
    661.2×
  187. 187StilfonteinNorth West, South Africa
    661.2×
  188. 187Chiang MaiChiang Mai, Thailand
    661.2×
  189. 187PhichitPhichit, Thailand
    661.2×
  190. 187CalamaAntofagasta, Chile
    661.2×
  191. 187DublinOhio, United States
    661.2×
  192. 187St. CatharinesOntario, Canada
    661.2×
  193. 187Saphan SungBangkok, Thailand
    661.2×
  194. 194Mexico CityMexico City, Mexico
    661.1×
  195. 194HueytownAlabama, United States
    661.1×
  196. 194University CityMissouri, United States
    661.1×
  197. 197YalaYala, Thailand
    661.1×
  198. 197Laudio / LlodioBasque Country, Spain
    661.1×
  199. 199ShenyangLiaoning, China
    661.1×
  200. 199PaducahKentucky, United States
    661.1×

Top 200 of 1,540 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, June 4, 2023, smogrank.com/history/2023-06-04 (accessed 2 Oct 2026).

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