SmogRank / History / October 20, 2024

Most polluted cities on October 20, 2024

2,274 cities ranked by their average PM2.5 over the day; the worst was Lahore, Pakistan, at 226.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during October 20, 2024. All episodes.

← Lahore 226.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for October 20, 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
    30215.1×
  2. 2Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    2149.3×
  3. 3DelhiDelhi, India
    1968.0×
  4. 4Kampalalow-cost sensorsCentral Region, Uganda
    1806.4×
  5. 5Forest GroveOregon, United States
    1776.2×
  6. 6Dhakalow-cost sensorsDhaka Division, Bangladesh
    1705.5×
  7. 7KolkataWest Bengal, India
    1695.5×
  8. 8Islamabadlow-cost sensorsIslamabad, Pakistan
    1675.3×
  9. 9NegotinCentral Serbia, Serbia
    1614.6×
  10. 10Kathmandulow-cost sensorsBagmati Province, Nepal
    1604.6×
  11. 11Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1564.2×
  12. 12Czechowice-DziedziceSilesia, Poland
    1493.7×
  13. 13Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    1443.5×
  14. 14ManamaManama, Bahrain
    1413.4×
  15. 15Kuala LumpurKuala Lumpur, Malaysia
    1383.4×
  16. 16BaghdadBaghdad, Iraq
    1303.2×
  17. 17GyálPest County, Hungary
    1293.1×
  18. 18Banja LukaSrpska, Bosnia and Herzegovina
    1212.9×
  19. 19Novi PazarCentral Serbia, Serbia
    1152.8×
  20. 20HanoiHanoi, Vietnam
    1142.7×
  21. 21AstanaAstana, Kazakhstan
    1082.6×
  22. 22Jastrzębie ZdrójSilesia, Poland
    1052.5×
  23. 23Victoria de DurangoDurango, Mexico
    1042.5×
  24. 24Karachilow-cost sensorsSindh, Pakistan
    1032.4×
  25. 25ŻywiecSilesia, Poland
    1022.4×
  26. 26ValjevoCentral Serbia, Serbia
    1012.4×
  27. 27TravnikFederation of B&H, Bosnia and Herzegovina
    962.2×
  28. 27ColumbusOhio, United States
    962.2×
  29. 29CoyhaiqueAysén, Chile
    952.2×
  30. 30UžiceCentral Serbia, Serbia
    942.1×
  31. 31IndianapolisIndiana, United States
    932.1×
  32. 32SalorTashkent Region, Uzbekistan
    922.1×
  33. 32FengshanTakao, Taiwan
    922.1×
  34. 34NyíregyházaSzabolcs-Szatmár-Bereg, Hungary
    922.1×
  35. 34Debrecenlow-cost sensorsHajdú-Bihar, Hungary
    922.1×
  36. 36ChaozhouTaiwan, Taiwan
    912.0×
  37. 37AshgabatAshgabat, Turkmenistan
    902.0×
  38. 38PrzemyślSubcarpathia, Poland
    881.9×
  39. 39Skarżysko-KamiennaŚwiętokrzyskie, Poland
    881.9×
  40. 39AntananarivoAnalamanga, Madagascar
    881.9×
  41. 41RacibórzSilesia, Poland
    861.9×
  42. 42KatowiceSilesia, Poland
    861.9×
  43. 43Almatylow-cost sensorsAlmaty, Kazakhstan
    861.9×
  44. 43Bielsko-BialaSilesia, Poland
    861.9×
  45. 45DejCluj County, Romania
    861.8×
  46. 46MumbaiMaharashtra, India
    851.8×
  47. 47PoznańGreater Poland, Poland
    841.8×
  48. 48Santa Anita - Los FicusLima region, Peru
    841.8×
  49. 49Gorzów WielkopolskiLubusz, Poland
    841.8×
  50. 50Puerto AysénAysén, Chile
    841.8×
  51. 51Zielona GóraLubusz, Poland
    831.8×
  52. 52BeijingBeijing, China
    831.7×
  53. 53GuangzhouGuangdong, China
    821.7×
  54. 54IaşiIași County, Romania
    821.7×
  55. 55BerounCentral Bohemia, Czechia
    821.7×
  56. 56Jacobo HunterArequipa, Peru
    811.7×
  57. 57WłocławekKujawsko-Pomorskie, Poland
    811.7×
  58. 58KielceŚwiętokrzyskie, Poland
    801.7×
  59. 58West MifflinPennsylvania, United States
    801.7×
  60. 60OlomoucOlomouc Region, Czechia
    801.6×
  61. 61KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    801.6×
  62. 62GdyniaPomerania, Poland
    791.6×
  63. 63LegionowoMazovia, Poland
    791.6×
  64. 64MiskolcBorsod-Abaúj-Zemplén, Hungary
    781.6×
  65. 65TainanTaiwan, Taiwan
    781.6×
  66. 65Terre HauteIndiana, United States
    781.6×
  67. 67Addis AbabaAddis Ababa, Ethiopia
    781.6×
  68. 68KaliszGreater Poland, Poland
    781.6×
  69. 69WestervilleOhio, United States
    771.6×
  70. 70PuliTaiwan, Taiwan
    771.5×
  71. 71NiskoSubcarpathia, Poland
    771.5×
  72. 71KragujevacCentral Serbia, Serbia
    771.5×
  73. 71N'DjamenaN’Djaména, Chad
    771.5×
  74. 71ZgierzŁódź Voivodeship, Poland
    771.5×
  75. 75CodleaBrașov County, Romania
    771.5×
  76. 75OpoleOpole Voivodeship, Poland
    771.5×
  77. 75KrakówLesser Poland, Poland
    771.5×
  78. 78BydgoszczKujawsko-Pomorskie, Poland
    771.5×
  79. 79ČačakCentral Serbia, Serbia
    761.5×
  80. 79DushanbeDushanbe, Tajikistan
    761.5×
  81. 81Bang NaBangkok, Thailand
    761.5×
  82. 82MiddletownOhio, United States
    761.5×
  83. 83KaohsiungTakao, Taiwan
    751.5×
  84. 84Kędzierzyn-KoźleOpole Voivodeship, Poland
    751.5×
  85. 85PřerovOlomouc Region, Czechia
    751.5×
  86. 85KutnoŁódź Voivodeship, Poland
    751.5×
  87. 85RedfordMichigan, United States
    751.5×
  88. 88YongkangTaiwan, Taiwan
    751.5×
  89. 89KladnoCentral Bohemia, Czechia
    741.4×
  90. 90BartlettTennessee, United States
    741.4×
  91. 91PrešovPrešov Region, Slovakia
    741.4×
  92. 92KigaliKigali, Rwanda
    741.4×
  93. 92ŽilinaŽilina Region, Slovakia
    741.4×
  94. 94RzeszówSubcarpathia, Poland
    731.4×
  95. 94KościanGreater Poland, Poland
    731.4×
  96. 96VeszprémVeszprém, Hungary
    731.4×
  97. 96KołobrzegWest Pomerania, Poland
    731.4×
  98. 98CairoCairo, Egypt
    731.4×
  99. 99DziałdowoWarmia-Masuria, Poland
    731.4×
  100. 100GdańskPomerania, Poland
    721.4×
  101. 100Upper AltonIllinois, United States
    721.4×
  102. 100JeffersonvilleIndiana, United States
    721.4×
  103. 103AkronOhio, United States
    721.4×
  104. 104BorCentral Serbia, Serbia
    721.4×
  105. 104AntofagastaAntofagasta, Chile
    721.4×
  106. 104San Francisco De BorjaLima region, Peru
    721.4×
  107. 107SzczecinWest Pomerania, Poland
    721.4×
  108. 107DetroitMichigan, United States
    721.4×
  109. 107Nepeanlow-cost sensorsOntario, Canada
    721.4×
  110. 110LublinLublin, Poland
    721.3×
  111. 111AugsburgBavaria, Germany
    711.3×
  112. 112PruszkówMazovia, Poland
    711.3×
  113. 113ZamośćLublin, Poland
    711.3×
  114. 113MostÚstí nad Labem Region, Czechia
    711.3×
  115. 115TocopillaAntofagasta, Chile
    711.3×
  116. 116PilsenPlzeň Region, Czechia
    711.3×
  117. 116BirminghamAlabama, United States
    711.3×
  118. 118ŁódźŁódź Voivodeship, Poland
    711.3×
  119. 119Winterthurlow-cost sensorsZurich, Switzerland
    701.3×
  120. 119TeltowBrandenburg, Germany
    701.3×
  121. 119SarajevoFederation of B&H, Bosnia and Herzegovina
    701.3×
  122. 122PúchovTrenčín Region, Slovakia
    701.3×
  123. 123ChennaiTamil Nadu, India
    701.3×
  124. 123VillarricaAraucania, Chile
    701.3×
  125. 123Little RockArkansas, United States
    701.3×
  126. 123Saint MatthewsKentucky, United States
    701.3×
  127. 123ToledoOhio, United States
    701.3×
  128. 128La UniónLos Ríos Region, Chile
    701.3×
  129. 128HualpénBiobio, Chile
    701.3×
  130. 130LučenecBanská Bystrica Region, Slovakia
    701.3×
  131. 130LancasterPennsylvania, United States
    701.3×
  132. 132LazarevacCentral Serbia, Serbia
    691.3×
  133. 132ToruńKujawsko-Pomorskie, Poland
    691.3×
  134. 132NacimientoBiobio, Chile
    691.3×
  135. 132ElginIllinois, United States
    691.3×
  136. 132CantonOhio, United States
    691.3×
  137. 137ČadcaŽilina Region, Slovakia
    691.3×
  138. 137Puente AltoSantiago Metropolitan, Chile
    691.3×
  139. 139RēzekneRēzekne, Latvia
    691.3×
  140. 139Istanbullow-cost sensorsIstanbul, Turkey
    691.3×
  141. 139PirotCentral Serbia, Serbia
    691.3×
  142. 139OsornoLos Lagos Region, Chile
    691.3×
  143. 143Konstancin-JeziornaMazovia, Poland
    691.2×
  144. 143PraguePrague, Czechia
    691.2×
  145. 143BytówPomerania, Poland
    691.2×
  146. 146SantiagoSantiago Metropolitan, Chile
    691.2×
  147. 146Puerto VarasLos Lagos Region, Chile
    691.2×
  148. 148Falconara MarittimaThe Marches, Italy
    681.2×
  149. 148Granite CityIllinois, United States
    681.2×
  150. 148University CityMissouri, United States
    681.2×
  151. 148MuncieIndiana, United States
    681.2×
  152. 152ZhushanTaiwan, Taiwan
    681.2×
  153. 152AricaArica y Parinacota Region, Chile
    681.2×
  154. 152WittenbergSaxony-Anhalt, Germany
    681.2×
  155. 155RadomMazovia, Poland
    681.2×
  156. 155WormsRheinland-Pfalz, Germany
    681.2×
  157. 155DessauSaxony-Anhalt, Germany
    681.2×
  158. 155BerlinState of Berlin, Germany
    681.2×
  159. 155Villa Poeta José Gálvez BarrenecheaLima region, Peru
    681.2×
  160. 160StarachowiceŚwiętokrzyskie, Poland
    681.2×
  161. 160GyőrGyőr-Moson-Sopron, Hungary
    681.2×
  162. 160AugustaGeorgia, United States
    681.2×
  163. 160HernandoMississippi, United States
    681.2×
  164. 164ŁaskŁódź Voivodeship, Poland
    681.2×
  165. 164KościerzynaPomerania, Poland
    681.2×
  166. 164TemucoAraucania, Chile
    681.2×
  167. 167WindsorOntario, Canada
    671.2×
  168. 168RadomskoŁódź Voivodeship, Poland
    671.2×
  169. 168ConcónValparaiso, Chile
    671.2×
  170. 168LondonOntario, Canada
    671.2×
  171. 171IngolstadtBavaria, Germany
    671.2×
  172. 171Strzelce OpolskieOpole Voivodeship, Poland
    671.2×
  173. 171DublinOhio, United States
    671.2×
  174. 174AugustówPodlasie, Poland
    671.2×
  175. 174Nong KhaemBangkok, Thailand
    671.2×
  176. 174Wan ChaiWan Chai, Hong Kong
    671.2×
  177. 177Cluj-NapocaCluj County, Romania
    671.2×
  178. 177NeubrandenburgMecklenburg-Vorpommern, Germany
    671.2×
  179. 177PezinokBratislava Region, Slovakia
    671.2×
  180. 177MartinŽilina Region, Slovakia
    671.2×
  181. 177MasonOhio, United States
    671.2×
  182. 177SarniaOntario, Canada
    671.2×
  183. 183Chiayi CityTaiwan, Taiwan
    661.2×
  184. 183UlmBaden-Wurttemberg, Germany
    661.2×
  185. 185WarsawMazovia, Poland
    661.1×
  186. 185DearbornMichigan, United States
    661.1×
  187. 185Grand RapidsMichigan, United States
    661.1×
  188. 185Lincoln ParkMichigan, United States
    661.1×
  189. 185OregonOhio, United States
    661.1×
  190. 190PeoriaIllinois, United States
    661.1×
  191. 191Puerto MonttLos Lagos Region, Chile
    661.1×
  192. 191Columbialow-cost sensorsMissouri, United States
    661.1×
  193. 191Port HuronMichigan, United States
    661.1×
  194. 194TrenčínTrenčín Region, Slovakia
    661.1×
  195. 195CoronelBiobio, Chile
    651.1×
  196. 195Khlong Sam WaBangkok, Thailand
    651.1×
  197. 197KraljevoCentral Serbia, Serbia
    651.1×
  198. 197Jelenia GóraLower Silesia, Poland
    651.1×
  199. 197ElblągWarmia-Masuria, Poland
    651.1×
  200. 200SmederevoCentral Serbia, Serbia
    651.1×

Top 200 of 2,274 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 20, 2024, smogrank.com/history/2024-10-20 (accessed 3 Oct 2026).

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