SmogRank / History / September 1, 2024

Most polluted cities on September 1, 2024

1,785 cities ranked by their average PM2.5 over the day; the worst was Villarrica, Chile, at 83.2 µg/m³. Each city's own local calendar day.

Bad-air episodes during September 1, 2024. All episodes.

← Villarrica 83.2 µg/m³ 80 µg/m³15 WHO 24-hour guideline
Every city ranked for September 1, 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. 1VillarricaAraucania, Chile
    1705.5×
  2. 2NacimientoBiobio, Chile
    1655.1×
  3. 3ChillánÑuble, Chile
    1584.3×
  4. 4Santa Anita - Los FicusLima region, Peru
    1544.0×
  5. 5Puerto AysénAysén, Chile
    1533.9×
  6. 6HualquiBiobio, Chile
    1533.9×
  7. 7CuricóMaule Region, Chile
    1523.8×
  8. 8SantiagoSantiago Metropolitan, Chile
    1453.6×
  9. 9Los ÁngelesBiobio, Chile
    1433.5×
  10. 10TalcaMaule Region, Chile
    1363.3×
  11. 11NampaIdaho, United States
    1343.3×
  12. 12BoiseIdaho, United States
    1333.2×
  13. 13Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1313.2×
  14. 14MeridianIdaho, United States
    1293.1×
  15. 15Puente AltoSantiago Metropolitan, Chile
    1263.0×
  16. 16TalaganteSantiago Metropolitan, Chile
    1243.0×
  17. 17CuranilahueBiobio, Chile
    1222.9×
  18. 18CoyhaiqueAysén, Chile
    1212.9×
  19. 19DushanbeDushanbe, Tajikistan
    1202.9×
  20. 19RancaguaO'Higgins Region, Chile
    1202.9×
  21. 21TemucoAraucania, Chile
    1192.8×
  22. 22Puerto MonttLos Lagos Region, Chile
    1182.8×
  23. 23CoronelBiobio, Chile
    1172.8×
  24. 24JakartaJakarta, Indonesia
    1162.8×
  25. 25CairoCairo, Egypt
    1152.7×
  26. 26Lahorelow-cost sensorsPunjab, Pakistan
    1142.7×
  27. 26ToméBiobio, Chile
    1142.7×
  28. 28São PauloSão Paulo, Brazil
    1122.7×
  29. 29BaghdadBaghdad, Iraq
    1102.6×
  30. 30OsornoLos Lagos Region, Chile
    1082.6×
  31. 31ValdiviaLos Ríos Region, Chile
    1052.5×
  32. 32RengoO'Higgins Region, Chile
    1032.4×
  33. 33Dhakalow-cost sensorsDhaka Division, Bangladesh
    1002.4×
  34. 34CauquenesMaule Region, Chile
    982.3×
  35. 35San Francisco De BorjaLima region, Peru
    972.3×
  36. 36DelhiDelhi, India
    972.2×
  37. 37QuilpuéValparaiso, Chile
    962.2×
  38. 38QuillotaValparaiso, Chile
    952.2×
  39. 39La UniónLos Ríos Region, Chile
    932.1×
  40. 40Puerto VarasLos Lagos Region, Chile
    902.0×
  41. 41QuinteroValparaiso, Chile
    881.9×
  42. 41ChiguayanteBiobio, Chile
    881.9×
  43. 43TalcahuanoBiobio, Chile
    871.9×
  44. 44CallaoCallao, Peru
    861.9×
  45. 45MaputoMaputo City, Mozambique
    851.8×
  46. 45AlgiersAlgiers, Algeria
    851.8×
  47. 47Addis AbabaAddis Ababa, Ethiopia
    841.8×
  48. 48LotaBiobio, Chile
    821.7×
  49. 49Viña del MarValparaiso, Chile
    811.7×
  50. 50Villa Poeta José Gálvez BarrenecheaLima region, Peru
    811.7×
  51. 51Şabāḩ as SālimMubārak al Kabīr, Kuwait
    801.6×
  52. 51La SerenaCoquimbo Region, Chile
    801.6×
  53. 53LimaLima Province, Peru
    801.6×
  54. 54NonsanChungcheongnam-do, South Korea
    791.6×
  55. 55Karachilow-cost sensorsSindh, Pakistan
    791.6×
  56. 55Ban Talat BuengChon Buri, Thailand
    791.6×
  57. 57Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    791.6×
  58. 58HanamGyeonggi-do, South Korea
    781.6×
  59. 59Quezon Citylow-cost sensorsNational Capital Region, Philippines
    771.6×
  60. 59HualpénBiobio, Chile
    771.6×
  61. 59ConcónValparaiso, Chile
    771.6×
  62. 59AntofagastaAntofagasta, Chile
    771.6×
  63. 63YauriCuzco Department, Peru
    771.5×
  64. 64Islamabadlow-cost sensorsIslamabad, Pakistan
    771.5×
  65. 64Jurong WestSingapore
    771.5×
  66. 66PyeongtaekGyeonggi-do, South Korea
    761.5×
  67. 67YesanChungcheongnam-do, South Korea
    761.5×
  68. 68PubalGyeonggi-do, South Korea
    751.5×
  69. 69TangjinChungcheongnam-do, South Korea
    751.5×
  70. 70WŏnjuGangwon-do, South Korea
    751.5×
  71. 70SeonghwanChungcheongnam-do, South Korea
    751.5×
  72. 70OsanGyeonggi-do, South Korea
    751.5×
  73. 70CoquimboCoquimbo Region, Chile
    751.5×
  74. 74Chinch'ŏnNorth Chungcheong, South Korea
    741.4×
  75. 75ShanghaiShanghai, China
    741.4×
  76. 75AsanChungcheongnam-do, South Korea
    741.4×
  77. 75CopiapóAtacama, Chile
    741.4×
  78. 78BeijingBeijing, China
    741.4×
  79. 78GwangmyeongGyeonggi-do, South Korea
    741.4×
  80. 80KinzanChungcheongnam-do, South Korea
    731.4×
  81. 81OkcheonNorth Chungcheong, South Korea
    731.4×
  82. 81Icheon-siGyeonggi-do, South Korea
    731.4×
  83. 81CelayaGuanajuato, Mexico
    731.4×
  84. 84XonacatlánMéxico, Mexico
    731.4×
  85. 85Jacobo HunterArequipa, Peru
    731.4×
  86. 86SarajevoFederation of B&H, Bosnia and Herzegovina
    721.4×
  87. 86ConcepciónBiobio, Chile
    721.4×
  88. 88PortervilleCalifornia, United States
    721.4×
  89. 89JeongeupJeollabuk-do, South Korea
    721.4×
  90. 90SuwonGyeonggi-do, South Korea
    711.3×
  91. 91SeoulSeoul, South Korea
    711.3×
  92. 91MissoulaMontana, United States
    711.3×
  93. 93GwangjuGyeonggi-do, South Korea
    711.3×
  94. 93Hwaseong-siGyeonggi-do, South Korea
    711.3×
  95. 93N'DjamenaN’Djaména, Chad
    711.3×
  96. 93Jastrzębie ZdrójSilesia, Poland
    711.3×
  97. 97YeojuGyeonggi-do, South Korea
    711.3×
  98. 97ButteMontana, United States
    711.3×
  99. 99IksanJeollabuk-do, South Korea
    711.3×
  100. 99IncheonIncheon, South Korea
    711.3×
  101. 99VisaliaCalifornia, United States
    711.3×
  102. 102NamsaJeollabuk-do, South Korea
    701.3×
  103. 102Ansan-siGyeonggi-do, South Korea
    701.3×
  104. 102KatowiceSilesia, Poland
    701.3×
  105. 105AricaArica y Parinacota Region, Chile
    701.3×
  106. 106ChocopeLa Libertad, Peru
    701.3×
  107. 107SejongSejong-si, South Korea
    701.3×
  108. 108ErlinTaiwan, Taiwan
    691.3×
  109. 108GuangzhouGuangdong, China
    691.3×
  110. 110KanchanaburiKanchanaburi, Thailand
    691.3×
  111. 110ErlunTaiwan, Taiwan
    691.3×
  112. 112XinyingTaiwan, Taiwan
    691.3×
  113. 112Guri-siGyeonggi-do, South Korea
    691.3×
  114. 112ŻywiecSilesia, Poland
    691.3×
  115. 112RiversideCalifornia, United States
    691.3×
  116. 116Jinan-gunJeollabuk-do, South Korea
    691.2×
  117. 117BuanJeollabuk-do, South Korea
    691.2×
  118. 118TratTrat, Thailand
    691.2×
  119. 118MokpoJeollanam-do, South Korea
    691.2×
  120. 118Gimpo-siGyeonggi-do, South Korea
    691.2×
  121. 118KimjeJeollabuk-do, South Korea
    691.2×
  122. 118ChangsuJeollabuk-do, South Korea
    691.2×
  123. 118Seongnam-siGyeonggi-do, South Korea
    691.2×
  124. 118RacibórzSilesia, Poland
    691.2×
  125. 125Jurupa ValleyCalifornia, United States
    681.2×
  126. 126WanjuJeollabuk-do, South Korea
    681.2×
  127. 126JungpyongNorth Chungcheong, South Korea
    681.2×
  128. 126Anyang-siGyeonggi-do, South Korea
    681.2×
  129. 126Saint CloudMinnesota, United States
    681.2×
  130. 130CheonanChungcheongnam-do, South Korea
    681.2×
  131. 130Medina Estateslow-cost sensorsGreater Accra, Ghana
    681.2×
  132. 132Hongch’ŏnGangwon-do, South Korea
    681.2×
  133. 133AnseongGyeonggi-do, South Korea
    681.2×
  134. 134PrzemyślSubcarpathia, Poland
    671.2×
  135. 134ChennaiTamil Nadu, India
    671.2×
  136. 134Wan ChaiWan Chai, Hong Kong
    671.2×
  137. 134TocopillaAntofagasta, Chile
    671.2×
  138. 138GunsanJeollabuk-do, South Korea
    671.2×
  139. 139Amnat CharoenAmnat Charoen, Thailand
    671.2×
  140. 139Bucheon-siGyeonggi-do, South Korea
    671.2×
  141. 141MiskolcBorsod-Abaúj-Zemplén, Hungary
    671.2×
  142. 141GimcheonGyeongsangbuk-do, South Korea
    671.2×
  143. 143TainanTaiwan, Taiwan
    671.2×
  144. 143GongjuChungcheongnam-do, South Korea
    671.2×
  145. 145SadaoSongkhla, Thailand
    661.2×
  146. 145Nakhon RatchasimaNakhon Ratchasima, Thailand
    661.2×
  147. 145Yangp'yŏngGyeonggi-do, South Korea
    661.2×
  148. 145Goyang-siGyeonggi-do, South Korea
    661.2×
  149. 149BakuBaki, Azerbaijan
    661.2×
  150. 149BuziTaiwan, Taiwan
    661.2×
  151. 151TarnówLesser Poland, Poland
    661.1×
  152. 151NamyangjuGyeonggi-do, South Korea
    661.1×
  153. 151ChangnyeongGyeongsangnam-do, South Korea
    661.1×
  154. 154Asunciónlow-cost sensorsAsuncion, Paraguay
    661.1×
  155. 154San ClementeIca, Peru
    661.1×
  156. 156Uijeongbu-siGyeonggi-do, South Korea
    661.1×
  157. 156HayangGyeongsangbuk-do, South Korea
    661.1×
  158. 156CalamaAntofagasta, Chile
    661.1×
  159. 156GlendoraCalifornia, United States
    661.1×
  160. 160Cheongju-siNorth Chungcheong, South Korea
    651.1×
  161. 160Accralow-cost sensorsGreater Accra, Ghana
    651.1×
  162. 162MumbaiMaharashtra, India
    651.1×
  163. 162YuanlinTaiwan, Taiwan
    651.1×
  164. 162YŏnmuChungcheongnam-do, South Korea
    651.1×
  165. 165FengshanTakao, Taiwan
    651.1×
  166. 165MasanGwangju, South Korea
    651.1×
  167. 165BakersfieldCalifornia, United States
    651.1×
  168. 165San Pedro de la PazBiobio, Chile
    651.1×
  169. 169YeongdongNorth Chungcheong, South Korea
    651.1×
  170. 170ToufenTaiwan, Taiwan
    651.1×
  171. 170ZhubeiTaiwan, Taiwan
    651.1×
  172. 170BurbankCalifornia, United States
    651.1×
  173. 173KoesanNorth Chungcheong, South Korea
    641.1×
  174. 173ChungjuNorth Chungcheong, South Korea
    641.1×
  175. 173WabuGyeonggi-do, South Korea
    641.1×
  176. 176Los AngelesCalifornia, United States
    641.1×
  177. 177DaejeonDaejeon, South Korea
    641.1×
  178. 177CheorwonGangwon-do, South Korea
    641.1×
  179. 177ŌzuKumamoto, Japan
    641.1×
  180. 177DartfordEngland, United Kingdom
    641.1×
  181. 177ShakopeeMinnesota, United States
    641.1×
  182. 182TaibaoTaiwan, Taiwan
    641.1×
  183. 182NangenJeollabuk-do, South Korea
    641.1×
  184. 184NyíregyházaSzabolcs-Szatmár-Bereg, Hungary
    641.1×
  185. 184NarathiwatNarathiwat, Thailand
    641.1×
  186. 184ClovisCalifornia, United States
    641.1×
  187. 187HwadoGyeonggi-do, South Korea
    631.1×
  188. 187ChanghuaTaiwan, Taiwan
    631.1×
  189. 187Abujalow-cost sensorsFCT, Nigeria
    631.1×
  190. 190MiaoliTaiwan, Taiwan
    631.0×
  191. 190GumiGyeongsangbuk-do, South Korea
    631.0×
  192. 190HongseongChungcheongnam-do, South Korea
    631.0×
  193. 190Bielsko-BialaSilesia, Poland
    631.0×
  194. 190MoscowIdaho, United States
    631.0×
  195. 195Kathmandulow-cost sensorsBagmati Province, Nepal
    631.0×
  196. 195YalaYala, Thailand
    631.0×
  197. 195JeonjuJeollabuk-do, South Korea
    631.0×
  198. 195PlymouthEngland, United Kingdom
    631.0×
  199. 195Twin FallsIdaho, United States
    631.0×
  200. 200BeigangTaiwan, Taiwan
    631.0×

Top 200 of 1,785 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, September 1, 2024, smogrank.com/history/2024-09-01 (accessed 3 Oct 2026).

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