SmogRank / History / August 31, 2024

Most polluted cities on August 31, 2024

1,772 cities ranked by their average PM2.5 over the day; the worst was Nacimiento, Chile, at 109.9 µg/m³. Each city's own local calendar day.

Bad-air episodes during August 31, 2024. All episodes.

← Nacimiento 109.9 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for August 31, 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. 1NacimientoBiobio, Chile
    1897.3×
  2. 2ValdiviaLos Ríos Region, Chile
    1816.5×
  3. 3Los ÁngelesBiobio, Chile
    1816.5×
  4. 4MeridianIdaho, United States
    1806.4×
  5. 5VillarricaAraucania, Chile
    1786.2×
  6. 6BoiseIdaho, United States
    1776.2×
  7. 7NampaIdaho, United States
    1776.2×
  8. 8CuranilahueBiobio, Chile
    1675.2×
  9. 9Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1665.2×
  10. 10TemucoAraucania, Chile
    1645.0×
  11. 11Santa Anita - Los FicusLima region, Peru
    1645.0×
  12. 12OsornoLos Lagos Region, Chile
    1644.9×
  13. 13TalcahuanoBiobio, Chile
    1564.2×
  14. 14ChillánÑuble, Chile
    1564.2×
  15. 15HualpénBiobio, Chile
    1533.9×
  16. 16Puerto AysénAysén, Chile
    1533.9×
  17. 17CoyhaiqueAysén, Chile
    1523.8×
  18. 18CoronelBiobio, Chile
    1513.7×
  19. 19HualquiBiobio, Chile
    1453.6×
  20. 20Lahorelow-cost sensorsPunjab, Pakistan
    1403.4×
  21. 21RancaguaO'Higgins Region, Chile
    1243.0×
  22. 22La UniónLos Ríos Region, Chile
    1222.9×
  23. 23RengoO'Higgins Region, Chile
    1202.9×
  24. 24Puerto VarasLos Lagos Region, Chile
    1182.8×
  25. 25BeijingBeijing, China
    1162.8×
  26. 26DushanbeDushanbe, Tajikistan
    1152.8×
  27. 27Asunciónlow-cost sensorsAsuncion, Paraguay
    1132.7×
  28. 28SantiagoSantiago Metropolitan, Chile
    1122.7×
  29. 29CairoCairo, Egypt
    1122.7×
  30. 29ChiguayanteBiobio, Chile
    1122.7×
  31. 31Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1112.6×
  32. 31TalcaMaule Region, Chile
    1112.6×
  33. 33São PauloSão Paulo, Brazil
    1112.6×
  34. 34Puerto MonttLos Lagos Region, Chile
    1102.6×
  35. 35TalaganteSantiago Metropolitan, Chile
    1102.6×
  36. 36Puente AltoSantiago Metropolitan, Chile
    1062.5×
  37. 37ToméBiobio, Chile
    992.3×
  38. 38CuricóMaule Region, Chile
    982.3×
  39. 39BaghdadBaghdad, Iraq
    962.2×
  40. 39Addis AbabaAddis Ababa, Ethiopia
    962.2×
  41. 41CauquenesMaule Region, Chile
    952.2×
  42. 42DelhiDelhi, India
    942.1×
  43. 43Dhakalow-cost sensorsDhaka Division, Bangladesh
    942.1×
  44. 44ConcepciónBiobio, Chile
    932.1×
  45. 45JakartaJakarta, Indonesia
    912.0×
  46. 45YauriCuzco Department, Peru
    912.0×
  47. 45San Francisco De BorjaLima region, Peru
    912.0×
  48. 48Karachilow-cost sensorsSindh, Pakistan
    902.0×
  49. 49QuillotaValparaiso, Chile
    892.0×
  50. 49CallaoCallao, Peru
    892.0×
  51. 51Twin FallsIdaho, United States
    881.9×
  52. 52San Pedro de la PazBiobio, Chile
    861.9×
  53. 53TocopillaAntofagasta, Chile
    831.8×
  54. 54Kathmandulow-cost sensorsBagmati Province, Nepal
    821.7×
  55. 54Bielsko-BialaSilesia, Poland
    821.7×
  56. 56Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    821.7×
  57. 57QuilpuéValparaiso, Chile
    811.7×
  58. 58QuinteroValparaiso, Chile
    801.7×
  59. 59Jacobo HunterArequipa, Peru
    801.6×
  60. 60LotaBiobio, Chile
    801.6×
  61. 61N'DjamenaN’Djaména, Chad
    801.6×
  62. 62KatowiceSilesia, Poland
    791.6×
  63. 63MaputoMaputo City, Mozambique
    791.6×
  64. 63YuanlinTaiwan, Taiwan
    791.6×
  65. 65Jastrzębie ZdrójSilesia, Poland
    791.6×
  66. 66AlgiersAlgiers, Algeria
    781.6×
  67. 67ErlunTaiwan, Taiwan
    771.6×
  68. 68AntananarivoAnalamanga, Madagascar
    771.5×
  69. 68IncheonIncheon, South Korea
    771.5×
  70. 70Ganghwa-gunIncheon, South Korea
    771.5×
  71. 70RacibórzSilesia, Poland
    771.5×
  72. 70Villa Poeta José Gálvez BarrenecheaLima region, Peru
    771.5×
  73. 73PrzemyślSubcarpathia, Poland
    761.5×
  74. 73SalorTashkent Region, Uzbekistan
    761.5×
  75. 75LimaLima Province, Peru
    751.5×
  76. 76ChennaiTamil Nadu, India
    751.5×
  77. 76YesanChungcheongnam-do, South Korea
    751.5×
  78. 76ConcónValparaiso, Chile
    751.5×
  79. 79PyeongtaekGyeonggi-do, South Korea
    751.5×
  80. 79Gimpo-siGyeonggi-do, South Korea
    751.5×
  81. 81Chinch'ŏnNorth Chungcheong, South Korea
    741.4×
  82. 82TratTrat, Thailand
    741.4×
  83. 83MielecSubcarpathia, Poland
    731.4×
  84. 83Czechowice-DziedziceSilesia, Poland
    731.4×
  85. 85LublinLublin, Poland
    731.4×
  86. 85Ban Talat BuengChon Buri, Thailand
    731.4×
  87. 85ZhushanTaiwan, Taiwan
    731.4×
  88. 85TangjinChungcheongnam-do, South Korea
    731.4×
  89. 89KrakówLesser Poland, Poland
    731.4×
  90. 90GwangmyeongGyeonggi-do, South Korea
    731.4×
  91. 91NantouTaiwan, Taiwan
    721.4×
  92. 91Hwaseong-siGyeonggi-do, South Korea
    721.4×
  93. 93NonsanChungcheongnam-do, South Korea
    721.4×
  94. 94HanamGyeonggi-do, South Korea
    721.4×
  95. 95SeonghwanChungcheongnam-do, South Korea
    721.3×
  96. 96Quezon Citylow-cost sensorsNational Capital Region, Philippines
    711.3×
  97. 97SuwonGyeonggi-do, South Korea
    711.3×
  98. 97BelfastNorthern Ireland, United Kingdom
    711.3×
  99. 97ŻywiecSilesia, Poland
    711.3×
  100. 100DouliuTaiwan, Taiwan
    711.3×
  101. 100FengshanTakao, Taiwan
    711.3×
  102. 102RadomMazovia, Poland
    711.3×
  103. 103ŁukówLublin, Poland
    711.3×
  104. 103Islamabadlow-cost sensorsIslamabad, Pakistan
    711.3×
  105. 105KielceŚwiętokrzyskie, Poland
    701.3×
  106. 105WanjuJeollabuk-do, South Korea
    701.3×
  107. 105OkcheonNorth Chungcheong, South Korea
    701.3×
  108. 105JungpyongNorth Chungcheong, South Korea
    701.3×
  109. 109KanchanaburiKanchanaburi, Thailand
    701.3×
  110. 109SeoulSeoul, South Korea
    701.3×
  111. 111BakuBaki, Azerbaijan
    701.3×
  112. 111AsanChungcheongnam-do, South Korea
    701.3×
  113. 111Ansan-siGyeonggi-do, South Korea
    701.3×
  114. 111PubalGyeonggi-do, South Korea
    701.3×
  115. 115Samut SakhonSamut Sakhon, Thailand
    701.3×
  116. 115Accralow-cost sensorsGreater Accra, Ghana
    701.3×
  117. 115Jurupa ValleyCalifornia, United States
    701.3×
  118. 118MiskolcBorsod-Abaúj-Zemplén, Hungary
    691.3×
  119. 118SadaoSongkhla, Thailand
    691.3×
  120. 118ChanghuaTaiwan, Taiwan
    691.3×
  121. 121OtwockMazovia, Poland
    691.3×
  122. 121TaipeiTaiwan, Taiwan
    691.3×
  123. 121OsanGyeonggi-do, South Korea
    691.3×
  124. 121Jurong WestSingapore
    691.3×
  125. 121Kędzierzyn-KoźleOpole Voivodeship, Poland
    691.3×
  126. 121Viña del MarValparaiso, Chile
    691.3×
  127. 127CoquimboCoquimbo Region, Chile
    691.3×
  128. 128PortervilleCalifornia, United States
    691.2×
  129. 129DaxiTaiwan, Taiwan
    691.2×
  130. 129Bucheon-siGyeonggi-do, South Korea
    691.2×
  131. 129Goyang-siGyeonggi-do, South Korea
    691.2×
  132. 129IksanJeollabuk-do, South Korea
    691.2×
  133. 129FresnoCalifornia, United States
    691.2×
  134. 134ErlinTaiwan, Taiwan
    681.2×
  135. 134New Taipei CityTaipei, Taiwan
    681.2×
  136. 136NiskoSubcarpathia, Poland
    681.2×
  137. 136XizhiTaipei, Taiwan
    681.2×
  138. 136KinzanChungcheongnam-do, South Korea
    681.2×
  139. 139ZhubeiTaiwan, Taiwan
    681.2×
  140. 140CalamaAntofagasta, Chile
    681.2×
  141. 141ZamośćLublin, Poland
    681.2×
  142. 141Anyang-siGyeonggi-do, South Korea
    681.2×
  143. 143Nong KhaemBangkok, Thailand
    671.2×
  144. 143AricaArica y Parinacota Region, Chile
    671.2×
  145. 143PullmanWashington, United States
    671.2×
  146. 146GunsanJeollabuk-do, South Korea
    671.2×
  147. 146KimjeJeollabuk-do, South Korea
    671.2×
  148. 146Icheon-siGyeonggi-do, South Korea
    671.2×
  149. 146VisaliaCalifornia, United States
    671.2×
  150. 150Skarżysko-KamiennaŚwiętokrzyskie, Poland
    671.2×
  151. 150TaibaoTaiwan, Taiwan
    671.2×
  152. 150Guri-siGyeonggi-do, South Korea
    671.2×
  153. 153Konstancin-JeziornaMazovia, Poland
    671.2×
  154. 153TaichungTaiwan, Taiwan
    671.2×
  155. 153CheonanChungcheongnam-do, South Korea
    671.2×
  156. 153Medina Estateslow-cost sensorsGreater Accra, Ghana
    671.2×
  157. 153CopiapóAtacama, Chile
    671.2×
  158. 153SejongSejong-si, South Korea
    671.2×
  159. 159NamsaJeollabuk-do, South Korea
    671.2×
  160. 159Cheongju-siNorth Chungcheong, South Korea
    671.2×
  161. 159AnseongGyeonggi-do, South Korea
    671.2×
  162. 159RadomskoŁódź Voivodeship, Poland
    671.2×
  163. 159RiversideCalifornia, United States
    671.2×
  164. 164BuziTaiwan, Taiwan
    661.2×
  165. 164JeonjuJeollabuk-do, South Korea
    661.2×
  166. 164La SerenaCoquimbo Region, Chile
    661.2×
  167. 164San ClementeIca, Peru
    661.2×
  168. 168NyíregyházaSzabolcs-Szatmár-Bereg, Hungary
    661.2×
  169. 168ToufenTaiwan, Taiwan
    661.2×
  170. 168NeiliTaiwan, Taiwan
    661.2×
  171. 168ShanghaiShanghai, China
    661.2×
  172. 172KoesanNorth Chungcheong, South Korea
    661.1×
  173. 173PuliTaiwan, Taiwan
    661.1×
  174. 173BeigangTaiwan, Taiwan
    661.1×
  175. 175PruszkówMazovia, Poland
    661.1×
  176. 175LegionowoMazovia, Poland
    661.1×
  177. 175BiałystokPodlasie, Poland
    661.1×
  178. 175MokpoJeollanam-do, South Korea
    661.1×
  179. 175NogalesSonora, Mexico
    661.1×
  180. 180NarathiwatNarathiwat, Thailand
    651.1×
  181. 180JinchengFukien, Taiwan
    651.1×
  182. 180Uijeongbu-siGyeonggi-do, South Korea
    651.1×
  183. 180ClovisCalifornia, United States
    651.1×
  184. 184SatunSatun, Thailand
    651.1×
  185. 184XinyingTaiwan, Taiwan
    651.1×
  186. 184GuangzhouGuangdong, China
    651.1×
  187. 184GimcheonGyeongsangbuk-do, South Korea
    651.1×
  188. 184Seongnam-siGyeonggi-do, South Korea
    651.1×
  189. 184SpekeEngland, United Kingdom
    651.1×
  190. 190Hat YaiSongkhla, Thailand
    651.1×
  191. 190KeelungTaiwan, Taiwan
    651.1×
  192. 190WŏnjuGangwon-do, South Korea
    651.1×
  193. 190Ulu BedokSingapore
    651.1×
  194. 190Saphan SungBangkok, Thailand
    651.1×
  195. 195YalaYala, Thailand
    651.1×
  196. 195MukdahanMukdahan, Thailand
    651.1×
  197. 195GwangjuGyeonggi-do, South Korea
    651.1×
  198. 198GumiGyeongsangbuk-do, South Korea
    651.1×
  199. 198Ang Mo Kio New TownSingapore
    651.1×
  200. 198ManchesterEngland, United Kingdom
    651.1×

Top 200 of 1,772 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, August 31, 2024, smogrank.com/history/2024-08-31 (accessed 3 Oct 2026).

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