SmogRank / History / June 1, 2023

Most polluted cities on June 1, 2023

1,557 cities ranked by their average PM2.5 over the day; the worst was Osorno, Chile, at 126.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during June 1, 2023. All episodes.

← Osorno 126.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for June 1, 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. 1OsornoLos Lagos Region, Chile
    2018.4×
  2. 2BloemfonteinFree State, South Africa
    1937.7×
  3. 3JohannesburgGauteng, South Africa
    1867.1×
  4. 4Puerto VarasLos Lagos Region, Chile
    1806.5×
  5. 5NacimientoBiobio, Chile
    1796.4×
  6. 6RancaguaO'Higgins Region, Chile
    1695.4×
  7. 7Dhakalow-cost sensorsDhaka Division, Bangladesh
    1655.0×
  8. 8SantiagoSantiago Metropolitan, Chile
    1634.8×
  9. 9TalaganteSantiago Metropolitan, Chile
    1624.7×
  10. 10RengoO'Higgins Region, Chile
    1624.7×
  11. 11BeijingBeijing, China
    1624.7×
  12. 12Puerto AysénAysén, Chile
    1614.6×
  13. 13TemucoAraucania, Chile
    1604.6×
  14. 14TlaquepaqueJalisco, Mexico
    1604.5×
  15. 15HualpénBiobio, Chile
    1564.2×
  16. 16ManamaManama, Bahrain
    1533.9×
  17. 17AshgabatAshgabat, Turkmenistan
    1533.9×
  18. 18BrakpanGauteng, South Africa
    1533.9×
  19. 19CoyhaiqueAysén, Chile
    1523.8×
  20. 20KolkataWest Bengal, India
    1523.8×
  21. 21Los ÁngelesBiobio, Chile
    1483.6×
  22. 22CuranilahueBiobio, Chile
    1403.4×
  23. 23CauquenesMaule Region, Chile
    1403.4×
  24. 24Puente AltoSantiago Metropolitan, Chile
    1373.3×
  25. 25ValdiviaLos Ríos Region, Chile
    1343.3×
  26. 25La UniónLos Ríos Region, Chile
    1343.3×
  27. 25CoronelBiobio, Chile
    1343.3×
  28. 28BritsNorth West, South Africa
    1283.1×
  29. 29TalcahuanoBiobio, Chile
    1233.0×
  30. 30HyderabadTelangana, India
    1172.8×
  31. 31CuricóMaule Region, Chile
    1142.7×
  32. 32KigaliKigali, Rwanda
    1132.7×
  33. 33ThembisaGauteng, South Africa
    1112.6×
  34. 34Lahorelow-cost sensorsPunjab, Pakistan
    1102.6×
  35. 34JakartaJakarta, Indonesia
    1102.6×
  36. 36Kathmandulow-cost sensorsBagmati Province, Nepal
    1082.6×
  37. 37ChillánÑuble, Chile
    1072.5×
  38. 38Fort McMurrayAlberta, Canada
    1072.5×
  39. 39DelhiDelhi, India
    1062.5×
  40. 40HanoiHanoi, Vietnam
    1052.5×
  41. 41Puerto MonttLos Lagos Region, Chile
    1052.5×
  42. 41DoverDelaware, United States
    1052.5×
  43. 43GuangzhouGuangdong, China
    1042.5×
  44. 44San CarlosÑuble, Chile
    1032.4×
  45. 45South VinelandNew Jersey, United States
    1032.4×
  46. 46Viña del MarValparaiso, Chile
    1022.4×
  47. 46CelayaGuanajuato, Mexico
    1022.4×
  48. 48ChennaiTamil Nadu, India
    992.3×
  49. 49ToméBiobio, Chile
    962.2×
  50. 50QuinteroValparaiso, Chile
    962.2×
  51. 51ConcónValparaiso, Chile
    962.2×
  52. 52CoquimboCoquimbo Region, Chile
    962.2×
  53. 53SalamancaGuanajuato, Mexico
    952.2×
  54. 53Rose HillVirginia, United States
    952.2×
  55. 55ConcepciónBiobio, Chile
    952.2×
  56. 56Wan ChaiWan Chai, Hong Kong
    952.2×
  57. 57LinaresMaule Region, Chile
    932.1×
  58. 58Bang NaBangkok, Thailand
    922.1×
  59. 59La SerenaCoquimbo Region, Chile
    912.0×
  60. 60SpringfieldVirginia, United States
    902.0×
  61. 61Ecatepec de MorelosMéxico, Mexico
    892.0×
  62. 62ChiguayanteBiobio, Chile
    881.9×
  63. 63DushanbeDushanbe, Tajikistan
    871.9×
  64. 63CopiapóAtacama, Chile
    871.9×
  65. 65HualquiBiobio, Chile
    871.9×
  66. 66AntofagastaAntofagasta, Chile
    871.9×
  67. 67WashingtonDistrict of Columbia, United States
    861.9×
  68. 68San Pedro de la PazBiobio, Chile
    861.9×
  69. 69TalcaMaule Region, Chile
    861.8×
  70. 69QuillotaValparaiso, Chile
    861.8×
  71. 71PristinaPristina, Kosovo
    841.8×
  72. 72BaghdadBaghdad, Iraq
    841.8×
  73. 73RabinalBaja Verapaz, Guatemala
    831.7×
  74. 73Guatemala CityGuatemala, Guatemala
    831.7×
  75. 75BridgeportConnecticut, United States
    821.7×
  76. 76Nong KhaemBangkok, Thailand
    821.7×
  77. 76Mexico CityMexico City, Mexico
    821.7×
  78. 78Khan Na YaoBangkok, Thailand
    821.7×
  79. 79Ban Samae DamBangkok, Thailand
    801.7×
  80. 79Khlong Sam WaBangkok, Thailand
    801.7×
  81. 81AntananarivoAnalamanga, Madagascar
    801.6×
  82. 81ShenyangLiaoning, China
    801.6×
  83. 83GuanajuatoGuanajuato, Mexico
    791.6×
  84. 83BensalemPennsylvania, United States
    791.6×
  85. 85Mong KokYau Tsim Mong District, Hong Kong
    791.6×
  86. 86BilbaoBasque Country, Spain
    791.6×
  87. 86LotaBiobio, Chile
    791.6×
  88. 88NanNan, Thailand
    791.6×
  89. 88Kwai ChungKwai Tsing District, Hong Kong
    791.6×
  90. 90Laudio / LlodioBasque Country, Spain
    781.6×
  91. 90Hacienda Santa FeJalisco, Mexico
    781.6×
  92. 92Saphan SungBangkok, Thailand
    771.6×
  93. 93Nakhon RatchasimaNakhon Ratchasima, Thailand
    771.5×
  94. 93Bang KapiBangkok, Thailand
    771.5×
  95. 95SaguenayQuebec, Canada
    771.5×
  96. 96MukdahanMukdahan, Thailand
    771.5×
  97. 97RayongRayong, Thailand
    771.5×
  98. 97Tuen MunTuen Mun, Hong Kong
    771.5×
  99. 97Silao de la VictoriaGuanajuato, Mexico
    771.5×
  100. 100Lat KrabangBangkok, Thailand
    761.5×
  101. 101Tin Shui WaiYuen Long, Hong Kong
    761.5×
  102. 101San Tung Chung HangIslands, Hong Kong
    761.5×
  103. 103South LaurelMaryland, United States
    761.5×
  104. 103LancasterPennsylvania, United States
    761.5×
  105. 105Ban ChangRayong, Thailand
    761.5×
  106. 105Tsuen WanTsuen Wan, Hong Kong
    761.5×
  107. 107Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    751.5×
  108. 107Bang Bo DistrictSamut Prakan, Thailand
    751.5×
  109. 107ScaggsvilleMaryland, United States
    751.5×
  110. 110Samut SakhonSamut Sakhon, Thailand
    751.5×
  111. 111Sau Mau PingKwun Tong District, Hong Kong
    751.5×
  112. 112Si Maha PhotPrachin Buri, Thailand
    741.4×
  113. 113SalorTashkent Region, Uzbekistan
    741.4×
  114. 114IrapuatoGuanajuato, Mexico
    741.4×
  115. 115Ga-RankuwaNorth West, South Africa
    741.4×
  116. 115TorontoOntario, Canada
    741.4×
  117. 117FanlingNorth District, Hong Kong
    741.4×
  118. 117Alto HospicioTarapacá, Chile
    741.4×
  119. 119Udon ThaniUdon Thani, Thailand
    741.4×
  120. 119HernandoMississippi, United States
    741.4×
  121. 119PhiladelphiaPennsylvania, United States
    741.4×
  122. 122PennsaukenNew Jersey, United States
    731.4×
  123. 123BangkokBangkok, Thailand
    731.4×
  124. 123TexarkanaTexas, United States
    731.4×
  125. 123Lincoln ParkMichigan, United States
    731.4×
  126. 126Nong ChokBangkok, Thailand
    731.4×
  127. 126BeauvaisHauts-de-France, France
    731.4×
  128. 128DurangoBasque Country, Spain
    721.4×
  129. 128San Miguel de AllendeGuanajuato, Mexico
    721.4×
  130. 130Castelló de la PlanaValencia, Spain
    721.4×
  131. 130TrnavaTrnava Region, Slovakia
    721.4×
  132. 130YorkPennsylvania, United States
    721.4×
  133. 133Phra PradaengSamut Prakan, Thailand
    721.4×
  134. 133CaenNormandy, France
    721.4×
  135. 135KalasinKalasin, Thailand
    721.3×
  136. 135Bueng KumBangkok, Thailand
    721.3×
  137. 137VigoGalicia, Spain
    711.3×
  138. 138PakxanBolikhamsai, Laos
    711.3×
  139. 138MooreOklahoma, United States
    711.3×
  140. 140KielSchleswig-Holstein, Germany
    711.3×
  141. 140NewarkDelaware, United States
    711.3×
  142. 140Lak SiBangkok, Thailand
    711.3×
  143. 143Tai PoTai Po, Hong Kong
    711.3×
  144. 144BethlehemPennsylvania, United States
    711.3×
  145. 145LampangLampang, Thailand
    701.3×
  146. 145SpringdaleArkansas, United States
    701.3×
  147. 147San Luis de la PazGuanajuato, Mexico
    701.3×
  148. 147HamiltonOntario, Canada
    701.3×
  149. 149LynnMassachusetts, United States
    701.3×
  150. 149AllentownPennsylvania, United States
    701.3×
  151. 151TocopillaAntofagasta, Chile
    701.3×
  152. 151CalamaAntofagasta, Chile
    701.3×
  153. 151KitchenerOntario, Canada
    701.3×
  154. 154Laem ChabangChon Buri, Thailand
    701.3×
  155. 154LisieuxNormandy, France
    701.3×
  156. 154NorristownPennsylvania, United States
    701.3×
  157. 157OviedoAsturias, Spain
    691.3×
  158. 157BelmopanCayo District, Belize
    691.3×
  159. 159UttaraditUttaradit, Thailand
    691.3×
  160. 159ElktonMaryland, United States
    691.3×
  161. 159ClevelandOhio, United States
    691.3×
  162. 162RatchaburiRatchaburi, Thailand
    691.3×
  163. 162AricaArica y Parinacota Region, Chile
    691.3×
  164. 162LowellMassachusetts, United States
    691.3×
  165. 165KanchanaburiKanchanaburi, Thailand
    691.2×
  166. 166PhraePhrae, Thailand
    691.2×
  167. 166ChanthaburiChanthaburi, Thailand
    691.2×
  168. 168WorcesterMassachusetts, United States
    691.2×
  169. 169Hua HinPrachuap Khiri Khan, Thailand
    681.2×
  170. 169YalaYala, Thailand
    681.2×
  171. 169Ban Talat BuengChon Buri, Thailand
    681.2×
  172. 172RuseRuse, Bulgaria
    681.2×
  173. 172MenenFlanders, Belgium
    681.2×
  174. 172SenicaTrnava Region, Slovakia
    681.2×
  175. 172ChesterPennsylvania, United States
    681.2×
  176. 172BostonMassachusetts, United States
    681.2×
  177. 172LethbridgeAlberta, Canada
    681.2×
  178. 178Saint-BrieucBrittany, France
    681.2×
  179. 178AmiensHauts-de-France, France
    681.2×
  180. 178GyálPest County, Hungary
    681.2×
  181. 181AthensAttica, Greece
    681.2×
  182. 181BermeoBasque Country, Spain
    681.2×
  183. 183BéthuneHauts-de-France, France
    681.2×
  184. 184Sha TinSha Tin, Hong Kong
    671.2×
  185. 184LilleHauts-de-France, France
    671.2×
  186. 184SpringfieldMassachusetts, United States
    671.2×
  187. 184HobbsNew Mexico, United States
    671.2×
  188. 188HarrisburgPennsylvania, United States
    671.2×
  189. 189Mueang NonthaburiNonthaburi, Thailand
    671.2×
  190. 190EdmondOklahoma, United States
    671.2×
  191. 190BarrieOntario, Canada
    671.2×
  192. 190BrantfordOntario, Canada
    671.2×
  193. 190Sai MaiBangkok, Thailand
    671.2×
  194. 194Ban Khlong PrawetBangkok, Thailand
    671.2×
  195. 194Kuils RiverWestern Cape, South Africa
    671.2×
  196. 194SulphurLouisiana, United States
    671.2×
  197. 194LondonOntario, Canada
    671.2×
  198. 198Chiang RaiChiang Rai, Thailand
    661.2×
  199. 198Ubon RatchathaniUbon Ratchathani, Thailand
    661.2×
  200. 198PortsmouthNew Hampshire, United States
    661.2×

Top 200 of 1,557 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 1, 2023, smogrank.com/history/2023-06-01 (accessed 2 Oct 2026).

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