SmogRank / History / October 21, 2024

Most polluted cities on October 21, 2024

2,085 cities ranked by their average PM2.5 over the day; the worst was Lahore, Pakistan, at 228.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during October 21, 2024. All episodes.

← Lahore 228.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for October 21, 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
    30615.2×
  2. 2Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    2209.7×
  3. 3DelhiDelhi, India
    2068.7×
  4. 4Dhakalow-cost sensorsDhaka Division, Bangladesh
    1786.3×
  5. 5Islamabadlow-cost sensorsIslamabad, Pakistan
    1766.1×
  6. 6NegotinCentral Serbia, Serbia
    1755.9×
  7. 7Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1665.1×
  8. 7Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    1665.1×
  9. 9KolkataWest Bengal, India
    1645.0×
  10. 10Kampalalow-cost sensorsCentral Region, Uganda
    1604.5×
  11. 11Banja LukaSrpska, Bosnia and Herzegovina
    1543.9×
  12. 12Kathmandulow-cost sensorsBagmati Province, Nepal
    1433.5×
  13. 13HanoiHanoi, Vietnam
    1283.1×
  14. 14LazarevacCentral Serbia, Serbia
    1283.1×
  15. 15BeijingBeijing, China
    1273.1×
  16. 16SmederevoCentral Serbia, Serbia
    1263.0×
  17. 17NyíregyházaSzabolcs-Szatmár-Bereg, Hungary
    1253.0×
  18. 18DziałdowoWarmia-Masuria, Poland
    1222.9×
  19. 19UžiceCentral Serbia, Serbia
    1182.8×
  20. 20KraljevoCentral Serbia, Serbia
    1182.8×
  21. 21Novi PazarCentral Serbia, Serbia
    1182.8×
  22. 22ValjevoCentral Serbia, Serbia
    1172.8×
  23. 23Skarżysko-KamiennaŚwiętokrzyskie, Poland
    1142.7×
  24. 24Victoria de DurangoDurango, Mexico
    1122.7×
  25. 25Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    1122.7×
  26. 26KielceŚwiętokrzyskie, Poland
    1112.6×
  27. 27ObrenovacCentral Serbia, Serbia
    1062.5×
  28. 28DushanbeDushanbe, Tajikistan
    1052.5×
  29. 29ZemunCentral Serbia, Serbia
    1042.4×
  30. 29Czechowice-DziedziceSilesia, Poland
    1042.4×
  31. 31CairoCairo, Egypt
    1042.4×
  32. 32TravnikFederation of B&H, Bosnia and Herzegovina
    1022.4×
  33. 32VillarricaAraucania, Chile
    1022.4×
  34. 34SalorTashkent Region, Uzbekistan
    982.3×
  35. 35KragujevacCentral Serbia, Serbia
    972.3×
  36. 36Karachilow-cost sensorsSindh, Pakistan
    962.2×
  37. 37StarachowiceŚwiętokrzyskie, Poland
    952.2×
  38. 38ČačakCentral Serbia, Serbia
    952.2×
  39. 39BaghdadBaghdad, Iraq
    942.2×
  40. 40AntananarivoAnalamanga, Madagascar
    942.1×
  41. 41Jacobo HunterArequipa, Peru
    922.1×
  42. 42WłocławekKujawsko-Pomorskie, Poland
    912.0×
  43. 43N'DjamenaN’Djaména, Chad
    912.0×
  44. 44NišCentral Serbia, Serbia
    902.0×
  45. 45PirotCentral Serbia, Serbia
    881.9×
  46. 46ĆuprijaCentral Serbia, Serbia
    871.9×
  47. 47ShanghaiShanghai, China
    871.9×
  48. 48KigaliKigali, Rwanda
    871.9×
  49. 48GyálPest County, Hungary
    871.9×
  50. 48FutogVojvodina, Serbia
    871.9×
  51. 51IaşiIași County, Romania
    861.9×
  52. 52Almatylow-cost sensorsAlmaty, Kazakhstan
    841.8×
  53. 52HualpénBiobio, Chile
    841.8×
  54. 54NiskoSubcarpathia, Poland
    841.8×
  55. 54LublinLublin, Poland
    841.8×
  56. 56ZamośćLublin, Poland
    841.8×
  57. 57Novi SadVojvodina, Serbia
    831.8×
  58. 58TemucoAraucania, Chile
    831.7×
  59. 59Wan ChaiWan Chai, Hong Kong
    821.7×
  60. 60ColumbusOhio, United States
    821.7×
  61. 61FengshanTakao, Taiwan
    821.7×
  62. 61TocopillaAntofagasta, Chile
    821.7×
  63. 63PrzemyślSubcarpathia, Poland
    821.7×
  64. 64MiskolcBorsod-Abaúj-Zemplén, Hungary
    811.7×
  65. 65AugustówPodlasie, Poland
    811.7×
  66. 65Bielsko-BialaSilesia, Poland
    811.7×
  67. 67ZgierzŁódź Voivodeship, Poland
    801.7×
  68. 68Jurong WestSingapore
    801.6×
  69. 69KrakówLesser Poland, Poland
    801.6×
  70. 70OtwockMazovia, Poland
    791.6×
  71. 70Tuen MunTuen Mun, Hong Kong
    791.6×
  72. 72ElblągWarmia-Masuria, Poland
    791.6×
  73. 73Addis AbabaAddis Ababa, Ethiopia
    781.6×
  74. 74KościanGreater Poland, Poland
    781.6×
  75. 74NacimientoBiobio, Chile
    781.6×
  76. 76Tin Shui WaiYuen Long, Hong Kong
    781.6×
  77. 77PrešovPrešov Region, Slovakia
    781.6×
  78. 77Santa Anita - Los FicusLima region, Peru
    781.6×
  79. 79OlsztynWarmia-Masuria, Poland
    771.5×
  80. 79PančevoVojvodina, Serbia
    771.5×
  81. 79AstanaAstana, Kazakhstan
    771.5×
  82. 79KatowiceSilesia, Poland
    771.5×
  83. 79BrawleyCalifornia, United States
    771.5×
  84. 84PruszkówMazovia, Poland
    771.5×
  85. 84ŁukówLublin, Poland
    771.5×
  86. 86KutnoŁódź Voivodeship, Poland
    771.5×
  87. 86BrookfieldIllinois, United States
    771.5×
  88. 88La UniónLos Ríos Region, Chile
    761.5×
  89. 89Vranov nad TopľouPrešov Region, Slovakia
    761.5×
  90. 90KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    761.5×
  91. 91KošiceKošice Region, Slovakia
    761.5×
  92. 92Bang NaBangkok, Thailand
    751.5×
  93. 92ČadcaŽilina Region, Slovakia
    751.5×
  94. 94ŁaskŁódź Voivodeship, Poland
    751.5×
  95. 94CoronelBiobio, Chile
    751.5×
  96. 96LučenecBanská Bystrica Region, Slovakia
    751.5×
  97. 97ŻywiecSilesia, Poland
    751.5×
  98. 97Upper AltonIllinois, United States
    751.5×
  99. 99FanlingNorth District, Hong Kong
    751.5×
  100. 99Ang Mo Kio New TownSingapore
    751.5×
  101. 101PułtuskMazovia, Poland
    741.4×
  102. 101JarosławSubcarpathia, Poland
    741.4×
  103. 101PúchovTrenčín Region, Slovakia
    741.4×
  104. 101Gorzów WielkopolskiLubusz, Poland
    741.4×
  105. 105ChaozhouTaiwan, Taiwan
    741.4×
  106. 105GuangzhouGuangdong, China
    741.4×
  107. 107GrajewoPodlasie, Poland
    741.4×
  108. 107BelgradeCentral Serbia, Serbia
    741.4×
  109. 109Medina Estateslow-cost sensorsGreater Accra, Ghana
    731.4×
  110. 109PassauBavaria, Germany
    731.4×
  111. 111KaohsiungTakao, Taiwan
    731.4×
  112. 111BirminghamAlabama, United States
    731.4×
  113. 111Jurupa ValleyCalifornia, United States
    731.4×
  114. 114PoznańGreater Poland, Poland
    731.4×
  115. 114KościerzynaPomerania, Poland
    731.4×
  116. 114GdyniaPomerania, Poland
    731.4×
  117. 117LegionowoMazovia, Poland
    731.4×
  118. 118TrebišovKošice Region, Slovakia
    721.4×
  119. 118JakartaJakarta, Indonesia
    721.4×
  120. 118ŁódźŁódź Voivodeship, Poland
    721.4×
  121. 118WestervilleOhio, United States
    721.4×
  122. 122WarsawMazovia, Poland
    721.4×
  123. 122RadomMazovia, Poland
    721.4×
  124. 122OpoleOpole Voivodeship, Poland
    721.4×
  125. 125Mong KokYau Tsim Mong District, Hong Kong
    721.4×
  126. 126KaliszGreater Poland, Poland
    721.4×
  127. 126HualquiBiobio, Chile
    721.4×
  128. 126ChillánÑuble, Chile
    721.4×
  129. 129RuseRuse, Bulgaria
    721.3×
  130. 129GdańskPomerania, Poland
    721.3×
  131. 129BydgoszczKujawsko-Pomorskie, Poland
    721.3×
  132. 132Puerto VarasLos Lagos Region, Chile
    711.3×
  133. 132Los ÁngelesBiobio, Chile
    711.3×
  134. 132GulfportMississippi, United States
    711.3×
  135. 135Tsuen WanTsuen Wan, Hong Kong
    711.3×
  136. 135San Tung Chung HangIslands, Hong Kong
    711.3×
  137. 135PłockMazovia, Poland
    711.3×
  138. 138WawerMazovia, Poland
    711.3×
  139. 138San ClementeIca, Peru
    711.3×
  140. 138OregonOhio, United States
    711.3×
  141. 141Konstancin-JeziornaMazovia, Poland
    711.3×
  142. 141OsornoLos Lagos Region, Chile
    711.3×
  143. 141Granite CityIllinois, United States
    711.3×
  144. 144Toms RiverNew Jersey, United States
    711.3×
  145. 145MumbaiMaharashtra, India
    711.3×
  146. 145RužomberokŽilina Region, Slovakia
    711.3×
  147. 147SarajevoFederation of B&H, Bosnia and Herzegovina
    701.3×
  148. 148Kwai ChungKwai Tsing District, Hong Kong
    701.3×
  149. 148West MifflinPennsylvania, United States
    701.3×
  150. 150Tai PoTai Po, Hong Kong
    691.3×
  151. 150QuillotaValparaiso, Chile
    691.3×
  152. 152Istanbullow-cost sensorsIstanbul, Turkey
    691.3×
  153. 153SremčicaCentral Serbia, Serbia
    691.3×
  154. 153MartinŽilina Region, Slovakia
    691.3×
  155. 155ColumbusGeorgia, United States
    691.2×
  156. 156BucharestBucharest, Romania
    691.2×
  157. 156Little RockArkansas, United States
    691.2×
  158. 156IndianapolisIndiana, United States
    691.2×
  159. 156JeffersonvilleIndiana, United States
    691.2×
  160. 160ValdiviaLos Ríos Region, Chile
    681.2×
  161. 160ConcónValparaiso, Chile
    681.2×
  162. 162SzegedCsongrád, Hungary
    681.2×
  163. 163PuliTaiwan, Taiwan
    681.2×
  164. 163Zielona GóraLubusz, Poland
    681.2×
  165. 163ToruńKujawsko-Pomorskie, Poland
    681.2×
  166. 166VarnaVarna, Bulgaria
    681.2×
  167. 166ChiguayanteBiobio, Chile
    681.2×
  168. 166AricaArica y Parinacota Region, Chile
    681.2×
  169. 166AntofagastaAntofagasta, Chile
    681.2×
  170. 166New HavenConnecticut, United States
    681.2×
  171. 166MuncieIndiana, United States
    681.2×
  172. 166Nepeanlow-cost sensorsOntario, Canada
    681.2×
  173. 173QuinteroValparaiso, Chile
    681.2×
  174. 174BardejovPrešov Region, Slovakia
    671.2×
  175. 174ŽilinaŽilina Region, Slovakia
    671.2×
  176. 176Jastrzębie ZdrójSilesia, Poland
    671.2×
  177. 177Botevgradlow-cost sensorsSofia, Bulgaria
    671.2×
  178. 177PezinokBratislava Region, Slovakia
    671.2×
  179. 177East Saint LouisIllinois, United States
    671.2×
  180. 180TalcahuanoBiobio, Chile
    671.2×
  181. 180Saint JosephMissouri, United States
    671.2×
  182. 182ŻyrardówMazovia, Poland
    671.2×
  183. 182WrocławLower Silesia, Poland
    671.2×
  184. 182RadomskoŁódź Voivodeship, Poland
    671.2×
  185. 182San Pedro de la PazBiobio, Chile
    671.2×
  186. 186Sham Shui PoSham Shui Po District, Hong Kong
    661.2×
  187. 186BytówPomerania, Poland
    661.2×
  188. 186Imperial BeachCalifornia, United States
    661.2×
  189. 189CauquenesMaule Region, Chile
    661.2×
  190. 190Puente AltoSantiago Metropolitan, Chile
    661.1×
  191. 190LotaBiobio, Chile
    661.1×
  192. 192ZhushanTaiwan, Taiwan
    661.1×
  193. 192Puerto MonttLos Lagos Region, Chile
    661.1×
  194. 192MiddletownOhio, United States
    661.1×
  195. 195AshgabatAshgabat, Turkmenistan
    651.1×
  196. 195Cluj-NapocaCluj County, Romania
    651.1×
  197. 195RacibórzSilesia, Poland
    651.1×
  198. 195ToméBiobio, Chile
    651.1×
  199. 195Columbialow-cost sensorsMissouri, United States
    651.1×
  200. 200WeidenBavaria, Germany
    651.1×

Top 200 of 2,085 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 21, 2024, smogrank.com/history/2024-10-21 (accessed 3 Oct 2026).

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