SmogRank / History / September 23, 2024

Most polluted cities on September 23, 2024

1,719 cities ranked by their average PM2.5 over the day; the worst was Kampala, Uganda, at 105.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during September 23, 2024. All episodes.

← Kampala 105.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for September 23, 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. 1Kampalalow-cost sensorsCentral Region, Uganda
    1867.0×
  2. 2Dhakalow-cost sensorsDhaka Division, Bangladesh
    1806.4×
  3. 3Lahorelow-cost sensorsPunjab, Pakistan
    1715.6×
  4. 4Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    1705.5×
  5. 5OsornoLos Lagos Region, Chile
    1695.4×
  6. 6AshgabatAshgabat, Turkmenistan
    1685.3×
  7. 6Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1685.3×
  8. 8Puerto VarasLos Lagos Region, Chile
    1624.8×
  9. 9DelhiDelhi, India
    1624.7×
  10. 10Asunciónlow-cost sensorsAsuncion, Paraguay
    1614.6×
  11. 11DushanbeDushanbe, Tajikistan
    1584.4×
  12. 12Santa Anita - Los FicusLima region, Peru
    1584.3×
  13. 13La UniónLos Ríos Region, Chile
    1533.9×
  14. 14JakartaJakarta, Indonesia
    1343.3×
  15. 15Islamabadlow-cost sensorsIslamabad, Pakistan
    1333.2×
  16. 16AntananarivoAnalamanga, Madagascar
    1283.1×
  17. 17Kathmandulow-cost sensorsBagmati Province, Nepal
    1192.8×
  18. 18KigaliKigali, Rwanda
    1182.8×
  19. 19N'DjamenaN’Djaména, Chad
    1142.7×
  20. 20HyderabadTelangana, India
    1132.7×
  21. 21Puerto MonttLos Lagos Region, Chile
    1122.7×
  22. 22Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1092.6×
  23. 23ChennaiTamil Nadu, India
    1062.5×
  24. 24BaghdadBaghdad, Iraq
    982.3×
  25. 25ValdiviaLos Ríos Region, Chile
    982.3×
  26. 26HanoiHanoi, Vietnam
    942.2×
  27. 27YanacanchaPasco, Peru
    942.1×
  28. 28CoyhaiqueAysén, Chile
    932.1×
  29. 29Duque de CaxiasRio de Janeiro, Brazil
    902.0×
  30. 30HualquiBiobio, Chile
    902.0×
  31. 31CuranilahueBiobio, Chile
    902.0×
  32. 32West MemphisArkansas, United States
    902.0×
  33. 33KolkataWest Bengal, India
    892.0×
  34. 34CairoCairo, Egypt
    881.9×
  35. 35Jacobo HunterArequipa, Peru
    851.8×
  36. 36Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    851.8×
  37. 37SzczecinWest Pomerania, Poland
    851.8×
  38. 38SmederevoCentral Serbia, Serbia
    841.8×
  39. 38KłodzkoLower Silesia, Poland
    841.8×
  40. 40KaliszGreater Poland, Poland
    831.8×
  41. 41SarpsborgØstfold, Norway
    831.7×
  42. 42KraljevoCentral Serbia, Serbia
    821.7×
  43. 42BydgoszczKujawsko-Pomorskie, Poland
    821.7×
  44. 44Puerto AysénAysén, Chile
    821.7×
  45. 45OlsztynWarmia-Masuria, Poland
    821.7×
  46. 46GdyniaPomerania, Poland
    811.7×
  47. 46LillestrømAkershus, Norway
    811.7×
  48. 48VillarricaAraucania, Chile
    801.7×
  49. 48AntofagastaAntofagasta, Chile
    801.7×
  50. 50KołobrzegWest Pomerania, Poland
    801.7×
  51. 51BeijingBeijing, China
    801.6×
  52. 52CauquenesMaule Region, Chile
    801.6×
  53. 53QuillotaValparaiso, Chile
    801.6×
  54. 54WłocławekKujawsko-Pomorskie, Poland
    791.6×
  55. 54BirminghamAlabama, United States
    791.6×
  56. 56GdańskPomerania, Poland
    791.6×
  57. 57StarachowiceŚwiętokrzyskie, Poland
    781.6×
  58. 58Little RockArkansas, United States
    771.6×
  59. 59ElblągWarmia-Masuria, Poland
    771.5×
  60. 59Novi SadVojvodina, Serbia
    771.5×
  61. 61OtwockMazovia, Poland
    761.5×
  62. 62PruszkówMazovia, Poland
    761.5×
  63. 63KatowiceSilesia, Poland
    761.5×
  64. 63Banja LukaSrpska, Bosnia and Herzegovina
    761.5×
  65. 63San Francisco De BorjaLima region, Peru
    761.5×
  66. 66AlgiersAlgiers, Algeria
    761.5×
  67. 66PoznańGreater Poland, Poland
    761.5×
  68. 66FutogVojvodina, Serbia
    761.5×
  69. 69RacibórzSilesia, Poland
    751.5×
  70. 70DziałdowoWarmia-Masuria, Poland
    751.5×
  71. 70Bang NaBangkok, Thailand
    751.5×
  72. 72KutnoŁódź Voivodeship, Poland
    751.5×
  73. 72Gorzów WielkopolskiLubusz, Poland
    751.5×
  74. 74ZemunCentral Serbia, Serbia
    741.4×
  75. 74Kingston upon HullEngland, United Kingdom
    741.4×
  76. 76Jurong WestSingapore
    741.4×
  77. 76QuilpuéValparaiso, Chile
    741.4×
  78. 76NacimientoBiobio, Chile
    741.4×
  79. 79KościerzynaPomerania, Poland
    741.4×
  80. 80ŁaskŁódź Voivodeship, Poland
    741.4×
  81. 80HualpénBiobio, Chile
    741.4×
  82. 82FredrikstadØstfold, Norway
    741.4×
  83. 83ĆuprijaCentral Serbia, Serbia
    731.4×
  84. 84QuinteroValparaiso, Chile
    731.4×
  85. 84ChillánÑuble, Chile
    731.4×
  86. 86LegionowoMazovia, Poland
    731.4×
  87. 86ObrenovacCentral Serbia, Serbia
    731.4×
  88. 88WarsawMazovia, Poland
    721.4×
  89. 88SantiagoSantiago Metropolitan, Chile
    721.4×
  90. 90KielceŚwiętokrzyskie, Poland
    721.4×
  91. 90AricaArica y Parinacota Region, Chile
    721.4×
  92. 92ŁódźŁódź Voivodeship, Poland
    721.4×
  93. 93LublinLublin, Poland
    721.3×
  94. 93CoronelBiobio, Chile
    721.3×
  95. 95KristiansandAgder, Norway
    711.3×
  96. 95CopiapóAtacama, Chile
    711.3×
  97. 97TocopillaAntofagasta, Chile
    711.3×
  98. 98Konstancin-JeziornaMazovia, Poland
    711.3×
  99. 98CuricóMaule Region, Chile
    711.3×
  100. 98CoquimboCoquimbo Region, Chile
    711.3×
  101. 101NyíregyházaSzabolcs-Szatmár-Bereg, Hungary
    711.3×
  102. 101NišCentral Serbia, Serbia
    711.3×
  103. 101SheffieldEngland, United Kingdom
    711.3×
  104. 101Jurupa ValleyCalifornia, United States
    711.3×
  105. 105Novi PazarCentral Serbia, Serbia
    711.3×
  106. 105CallaoCallao, Peru
    711.3×
  107. 107OsloOslo, Norway
    711.3×
  108. 107NogalesSonora, Mexico
    711.3×
  109. 109PułtuskMazovia, Poland
    701.3×
  110. 109ŁukówLublin, Poland
    701.3×
  111. 109FontanaCalifornia, United States
    701.3×
  112. 112Saphan SungBangkok, Thailand
    701.3×
  113. 113UžiceCentral Serbia, Serbia
    701.3×
  114. 113GainesvilleGeorgia, United States
    701.3×
  115. 115MiskolcBorsod-Abaúj-Zemplén, Hungary
    701.3×
  116. 115Zielona GóraLubusz, Poland
    701.3×
  117. 117ToruńKujawsko-Pomorskie, Poland
    701.3×
  118. 117BytówPomerania, Poland
    701.3×
  119. 117LawrencevilleGeorgia, United States
    701.3×
  120. 120NewmarketEngland, United Kingdom
    691.3×
  121. 121GrajewoPodlasie, Poland
    691.3×
  122. 121TemucoAraucania, Chile
    691.3×
  123. 123LazarevacCentral Serbia, Serbia
    691.2×
  124. 123PłockMazovia, Poland
    691.2×
  125. 123Villa Poeta José Gálvez BarrenecheaLima region, Peru
    691.2×
  126. 126Skarżysko-KamiennaŚwiętokrzyskie, Poland
    691.2×
  127. 126La SerenaCoquimbo Region, Chile
    691.2×
  128. 128BorCentral Serbia, Serbia
    681.2×
  129. 128Almatylow-cost sensorsAlmaty, Kazakhstan
    681.2×
  130. 128Ang Mo Kio New TownSingapore
    681.2×
  131. 131NiskoSubcarpathia, Poland
    681.2×
  132. 131ZgierzŁódź Voivodeship, Poland
    681.2×
  133. 131Kędzierzyn-KoźleOpole Voivodeship, Poland
    681.2×
  134. 134MumbaiMaharashtra, India
    681.2×
  135. 134LeedsEngland, United Kingdom
    681.2×
  136. 134ConcónValparaiso, Chile
    681.2×
  137. 137Yerevanlow-cost sensorsYerevan, Armenia
    681.2×
  138. 137RadomMazovia, Poland
    681.2×
  139. 137ChesterfieldEngland, United Kingdom
    681.2×
  140. 137YauriCuzco Department, Peru
    681.2×
  141. 141Ulu BedokSingapore
    681.2×
  142. 142ZamośćLublin, Poland
    671.2×
  143. 142RancaguaO'Higgins Region, Chile
    671.2×
  144. 142Los ÁngelesBiobio, Chile
    671.2×
  145. 145Nong KhaemBangkok, Thailand
    671.2×
  146. 145BarnsleyEngland, United Kingdom
    671.2×
  147. 145PortervilleCalifornia, United States
    671.2×
  148. 148RiversideCalifornia, United States
    671.2×
  149. 148Khlong Sam WaBangkok, Thailand
    671.2×
  150. 150Bielsko-BialaSilesia, Poland
    671.2×
  151. 151ShanghaiShanghai, China
    661.2×
  152. 152ŻyrardówMazovia, Poland
    661.2×
  153. 152GuangzhouGuangdong, China
    661.2×
  154. 152KrakówLesser Poland, Poland
    661.2×
  155. 152KościanGreater Poland, Poland
    661.2×
  156. 152HueytownAlabama, United States
    661.2×
  157. 157BartlettTennessee, United States
    661.1×
  158. 157AnaheimCalifornia, United States
    661.1×
  159. 159PančevoVojvodina, Serbia
    661.1×
  160. 160WawerMazovia, Poland
    661.1×
  161. 160Newcastle upon TyneEngland, United Kingdom
    661.1×
  162. 160Puente AltoSantiago Metropolitan, Chile
    661.1×
  163. 160Alto HospicioTarapacá, Chile
    661.1×
  164. 160YumaArizona, United States
    661.1×
  165. 165VisaliaCalifornia, United States
    661.1×
  166. 166BelgradeCentral Serbia, Serbia
    651.1×
  167. 166ChocopeLa Libertad, Peru
    651.1×
  168. 168MaputoMaputo City, Mozambique
    651.1×
  169. 168MiddlesbroughEngland, United Kingdom
    651.1×
  170. 168HernandoMississippi, United States
    651.1×
  171. 171YorkEngland, United Kingdom
    651.1×
  172. 172NorwichEngland, United Kingdom
    651.1×
  173. 172GlasgowScotland, United Kingdom
    651.1×
  174. 172BelfastNorthern Ireland, United Kingdom
    651.1×
  175. 175JarosławSubcarpathia, Poland
    651.1×
  176. 175ChiguayanteBiobio, Chile
    651.1×
  177. 177BiałystokPodlasie, Poland
    641.1×
  178. 177RadomskoŁódź Voivodeship, Poland
    641.1×
  179. 177CalamaAntofagasta, Chile
    641.1×
  180. 177San ClementeIca, Peru
    641.1×
  181. 181DrammenBuskerud, Norway
    641.1×
  182. 182Botevgradlow-cost sensorsSofia, Bulgaria
    641.1×
  183. 182PorsgrunnTelemark, Norway
    641.1×
  184. 182TalaganteSantiago Metropolitan, Chile
    641.1×
  185. 185Ban Khlong PrawetBangkok, Thailand
    641.1×
  186. 186ManchesterEngland, United Kingdom
    631.1×
  187. 186LiverpoolEngland, United Kingdom
    631.1×
  188. 186Jelenia GóraLower Silesia, Poland
    631.1×
  189. 186GlendoraCalifornia, United States
    631.1×
  190. 190Phenix CityAlabama, United States
    631.0×
  191. 191EłkWarmia-Masuria, Poland
    631.0×
  192. 191OpoleOpole Voivodeship, Poland
    631.0×
  193. 193TalcahuanoBiobio, Chile
    631.0×
  194. 194ŻywiecSilesia, Poland
    631.0×
  195. 194WrocławLower Silesia, Poland
    631.0×
  196. 194ŚwiecieKujawsko-Pomorskie, Poland
    631.0×
  197. 194TalcaMaule Region, Chile
    631.0×
  198. 194FresnoCalifornia, United States
    631.0×
  199. 194Khan Na YaoBangkok, Thailand
    631.0×
  200. 200WoodlandsSingapore
    631.0×

Top 200 of 1,719 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 23, 2024, smogrank.com/history/2024-09-23 (accessed 3 Oct 2026).

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