SmogRank / History / October 4, 2024

Most polluted cities on October 4, 2024

1,724 cities ranked by their average PM2.5 over the day; the worst was Lahore, Pakistan, at 127.0 µg/m³. Each city's own local calendar day.

← Lahore 127.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for October 4, 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. 1Lahorelow-cost sensorsPunjab, Pakistan
    2028.5×
  2. 2Kampalalow-cost sensorsCentral Region, Uganda
    1967.9×
  3. 3Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1786.3×
  4. 4HanoiHanoi, Vietnam
    1574.3×
  5. 5Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    1523.8×
  6. 6NacimientoBiobio, Chile
    1493.7×
  7. 7BeijingBeijing, China
    1493.7×
  8. 8AshgabatAshgabat, Turkmenistan
    1453.6×
  9. 9Islamabadlow-cost sensorsIslamabad, Pakistan
    1443.5×
  10. 10DelhiDelhi, India
    1393.4×
  11. 11KolkataWest Bengal, India
    1383.4×
  12. 12Dhakalow-cost sensorsDhaka Division, Bangladesh
    1182.8×
  13. 12ChillánÑuble, Chile
    1182.8×
  14. 14CairoCairo, Egypt
    1162.8×
  15. 15JakartaJakarta, Indonesia
    1162.8×
  16. 16LimaLima Province, Peru
    1082.6×
  17. 17BaghdadBaghdad, Iraq
    1062.5×
  18. 18Puerto VarasLos Lagos Region, Chile
    1042.4×
  19. 19Santa Anita - Los FicusLima region, Peru
    992.3×
  20. 20HualpénBiobio, Chile
    992.3×
  21. 21VillarricaAraucania, Chile
    992.3×
  22. 22CoyhaiqueAysén, Chile
    992.3×
  23. 23ChiguayanteBiobio, Chile
    962.2×
  24. 24SalorTashkent Region, Uzbekistan
    962.2×
  25. 25ToméBiobio, Chile
    942.1×
  26. 26DushanbeDushanbe, Tajikistan
    942.1×
  27. 27Villa Poeta José Gálvez BarrenecheaLima region, Peru
    932.1×
  28. 28La UniónLos Ríos Region, Chile
    922.1×
  29. 28ButteMontana, United States
    922.1×
  30. 30HualquiBiobio, Chile
    922.1×
  31. 31CoronelBiobio, Chile
    912.0×
  32. 32Jacobo HunterArequipa, Peru
    912.0×
  33. 33ValdiviaLos Ríos Region, Chile
    912.0×
  34. 34Los ÁngelesBiobio, Chile
    902.0×
  35. 35SantiagoSantiago Metropolitan, Chile
    902.0×
  36. 36TemucoAraucania, Chile
    892.0×
  37. 37CuricóMaule Region, Chile
    881.9×
  38. 38OsornoLos Lagos Region, Chile
    881.9×
  39. 39TalcaMaule Region, Chile
    871.9×
  40. 40TocopillaAntofagasta, Chile
    841.8×
  41. 41RancaguaO'Higgins Region, Chile
    831.8×
  42. 42ChennaiTamil Nadu, India
    831.7×
  43. 42Jastrzębie ZdrójSilesia, Poland
    831.7×
  44. 44Puente AltoSantiago Metropolitan, Chile
    821.7×
  45. 45N'DjamenaN’Djaména, Chad
    821.7×
  46. 45YauriCuzco Department, Peru
    821.7×
  47. 47BendOregon, United States
    801.7×
  48. 48San Francisco De BorjaLima region, Peru
    801.7×
  49. 49Istanbullow-cost sensorsIstanbul, Turkey
    801.6×
  50. 50NogalesSonora, Mexico
    791.6×
  51. 51CauquenesMaule Region, Chile
    781.6×
  52. 52CuranilahueBiobio, Chile
    781.6×
  53. 53ConcepciónBiobio, Chile
    771.6×
  54. 54AricaArica y Parinacota Region, Chile
    771.5×
  55. 55TalaganteSantiago Metropolitan, Chile
    771.5×
  56. 56Bang NaBangkok, Thailand
    771.5×
  57. 56Wan ChaiWan Chai, Hong Kong
    771.5×
  58. 58QuillotaValparaiso, Chile
    771.5×
  59. 58AntofagastaAntofagasta, Chile
    771.5×
  60. 60RengoO'Higgins Region, Chile
    771.5×
  61. 61BurbankCalifornia, United States
    761.5×
  62. 62TalcahuanoBiobio, Chile
    761.5×
  63. 63Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    751.5×
  64. 64Ang Mo Kio New TownSingapore
    751.5×
  65. 65Kathmandulow-cost sensorsBagmati Province, Nepal
    751.5×
  66. 66CallaoCallao, Peru
    741.4×
  67. 67Şabāḩ as SālimMubārak al Kabīr, Kuwait
    741.4×
  68. 68QuinteroValparaiso, Chile
    741.4×
  69. 68HelenaMontana, United States
    741.4×
  70. 70FontanaCalifornia, United States
    741.4×
  71. 71Los AngelesCalifornia, United States
    741.4×
  72. 72Tuen MunTuen Mun, Hong Kong
    731.4×
  73. 72Jurupa ValleyCalifornia, United States
    731.4×
  74. 74LotaBiobio, Chile
    731.4×
  75. 75Skarżysko-KamiennaŚwiętokrzyskie, Poland
    731.4×
  76. 75GuangzhouGuangdong, China
    731.4×
  77. 75Viña del MarValparaiso, Chile
    731.4×
  78. 75Imperial BeachCalifornia, United States
    731.4×
  79. 75Santa Monicalow-cost sensorsCalifornia, United States
    731.4×
  80. 80RacibórzSilesia, Poland
    731.4×
  81. 80San ClementeIca, Peru
    731.4×
  82. 82FresnoCalifornia, United States
    721.4×
  83. 83PruszkówMazovia, Poland
    721.4×
  84. 84RichmondCalifornia, United States
    721.3×
  85. 85HyderabadTelangana, India
    711.3×
  86. 85QuilpuéValparaiso, Chile
    711.3×
  87. 85La SerenaCoquimbo Region, Chile
    711.3×
  88. 85ConcónValparaiso, Chile
    711.3×
  89. 89Czechowice-DziedziceSilesia, Poland
    711.3×
  90. 89CoquimboCoquimbo Region, Chile
    711.3×
  91. 91San Pedro de la PazBiobio, Chile
    711.3×
  92. 92Jurong WestSingapore
    711.3×
  93. 92CopiapóAtacama, Chile
    711.3×
  94. 94AlgiersAlgiers, Algeria
    711.3×
  95. 94HanfordCalifornia, United States
    711.3×
  96. 96WatertownSouth Dakota, United States
    701.3×
  97. 97Agouralow-cost sensorsCalifornia, United States
    701.3×
  98. 98ManamaManama, Bahrain
    691.3×
  99. 98Addis AbabaAddis Ababa, Ethiopia
    691.3×
  100. 98Chula VistaCalifornia, United States
    691.3×
  101. 101KatowiceSilesia, Poland
    691.2×
  102. 101IndianapolisIndiana, United States
    691.2×
  103. 103RiversideCalifornia, United States
    691.2×
  104. 104El CajonCalifornia, United States
    691.2×
  105. 105Hawthornelow-cost sensorsCalifornia, United States
    681.2×
  106. 106Inglewoodlow-cost sensorsCalifornia, United States
    681.2×
  107. 107Karachilow-cost sensorsSindh, Pakistan
    681.2×
  108. 108Puerto MonttLos Lagos Region, Chile
    681.2×
  109. 109BakuBaki, Azerbaijan
    681.2×
  110. 109Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    681.2×
  111. 111Quezon Citylow-cost sensorsNational Capital Region, Philippines
    671.2×
  112. 111San DiegoCalifornia, United States
    671.2×
  113. 113MielecSubcarpathia, Poland
    671.2×
  114. 113RabinalBaja Verapaz, Guatemala
    671.2×
  115. 113GlendoraCalifornia, United States
    671.2×
  116. 116OtwockMazovia, Poland
    671.2×
  117. 116DallasTexas, United States
    671.2×
  118. 118LegionowoMazovia, Poland
    671.2×
  119. 118HernandoMississippi, United States
    671.2×
  120. 120Guatemala CityGuatemala, Guatemala
    671.2×
  121. 120VisaliaCalifornia, United States
    671.2×
  122. 122Vientianelow-cost sensorsVientiane Prefecture, Laos
    661.2×
  123. 122WoodlandsSingapore
    661.2×
  124. 122Bielsko-BialaSilesia, Poland
    661.2×
  125. 125Alto HospicioTarapacá, Chile
    661.1×
  126. 126CalamaAntofagasta, Chile
    661.1×
  127. 126San JoseCalifornia, United States
    661.1×
  128. 128LublinLublin, Poland
    661.1×
  129. 128McAlesterOklahoma, United States
    661.1×
  130. 130WarsawMazovia, Poland
    661.1×
  131. 130RadomMazovia, Poland
    661.1×
  132. 130BirminghamAlabama, United States
    661.1×
  133. 130BartlettTennessee, United States
    661.1×
  134. 130OaklandCalifornia, United States
    661.1×
  135. 135BerkeleyCalifornia, United States
    651.1×
  136. 135Khlong Sam WaBangkok, Thailand
    651.1×
  137. 137Konstancin-JeziornaMazovia, Poland
    651.1×
  138. 137SpringdaleArkansas, United States
    651.1×
  139. 137MooreOklahoma, United States
    651.1×
  140. 140ŻyrardówMazovia, Poland
    651.1×
  141. 140StarachowiceŚwiętokrzyskie, Poland
    651.1×
  142. 140BogotáBogota D.C., Colombia
    651.1×
  143. 140Little RockArkansas, United States
    651.1×
  144. 140AnaheimCalifornia, United States
    651.1×
  145. 140Santa BarbaraCalifornia, United States
    651.1×
  146. 146Tin Shui WaiYuen Long, Hong Kong
    651.1×
  147. 146San Tung Chung HangIslands, Hong Kong
    651.1×
  148. 148Asunciónlow-cost sensorsAsuncion, Paraguay
    641.1×
  149. 148Carsonlow-cost sensorsCalifornia, United States
    641.1×
  150. 150La Crescenta-Montroselow-cost sensorsCalifornia, United States
    641.1×
  151. 151Kędzierzyn-KoźleOpole Voivodeship, Poland
    641.1×
  152. 151Torrancelow-cost sensorsCalifornia, United States
    641.1×
  153. 153KielceŚwiętokrzyskie, Poland
    641.1×
  154. 153FanlingNorth District, Hong Kong
    641.1×
  155. 153Santa ClaritaCalifornia, United States
    641.1×
  156. 156Puerto AysénAysén, Chile
    631.1×
  157. 156HarrisburgPennsylvania, United States
    631.1×
  158. 158DerbyKansas, United States
    631.0×
  159. 159Ban Khlong PrawetBangkok, Thailand
    631.0×
  160. 159NogalesArizona, United States
    631.0×
  161. 159PortervilleCalifornia, United States
    631.0×
  162. 162ChocopeLa Libertad, Peru
    631.0×
  163. 162ComptonCalifornia, United States
    631.0×
  164. 164AntananarivoAnalamanga, Madagascar
    631.0×
  165. 164ClovisCalifornia, United States
    631.0×
  166. 166Mong KokYau Tsim Mong District, Hong Kong
    621.0×
  167. 166Queenstown Estatelow-cost sensorsSingapore
    621.0×
  168. 168Ban Samae DamBangkok, Thailand
    621.0×
  169. 168ColumbusOhio, United States
    621.0×
  170. 170DębicaSubcarpathia, Poland
    621.0×
  171. 170Oklahoma CityOklahoma, United States
    621.0×
  172. 170West MifflinPennsylvania, United States
    621.0×
  173. 170Colorado SpringsColorado, United States
    621.0×
  174. 174NiskoSubcarpathia, Poland
    621.0×
  175. 174CalexicoCalifornia, United States
    621.0×
  176. 174YanacanchaPasco, Peru
    621.0×
  177. 177OregonOhio, United States
    621.0×
  178. 178GainesvilleGeorgia, United States
    611.0×
  179. 178BakersfieldCalifornia, United States
    611.0×
  180. 178Saphan SungBangkok, Thailand
    611.0×
  181. 181LebanonPennsylvania, United States
    611.0×
  182. 182Tai PoTai Po, Hong Kong
    611.0×
  183. 182RadomskoŁódź Voivodeship, Poland
    611.0×
  184. 182CantonOhio, United States
    611.0×
  185. 185Nong KhaemBangkok, Thailand
    610.9×
  186. 185East RidgeTennessee, United States
    610.9×
  187. 185Lake ElsinoreCalifornia, United States
    610.9×
  188. 185Rio RanchoNew Mexico, United States
    610.9×
  189. 189Bang KapiBangkok, Thailand
    600.9×
  190. 189KrakówLesser Poland, Poland
    600.9×
  191. 189ToledoOhio, United States
    600.9×
  192. 189PowayCalifornia, United States
    600.9×
  193. 189San LeandroCalifornia, United States
    600.9×
  194. 194ChimboteAncash, Peru
    600.9×
  195. 194West MemphisArkansas, United States
    600.9×
  196. 194AlbuquerqueNew Mexico, United States
    600.9×
  197. 197WawerMazovia, Poland
    600.9×
  198. 197ŁukówLublin, Poland
    600.9×
  199. 197DearbornMichigan, United States
    600.9×
  200. 197CorcoranCalifornia, United States
    600.9×

Top 200 of 1,724 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, October 4, 2024, smogrank.com/history/2024-10-04 (accessed 3 Oct 2026).

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