SmogRank / History / April 24, 2024

Most polluted cities on April 24, 2024

2,166 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 191.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during April 24, 2024. All episodes.

← N'Djamena 191.0 µg/m³ 150 µg/m³15 WHO 24-hour guideline
Every city ranked for April 24, 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. 1N'DjamenaN’Djaména, Chad
    26612.7×
  2. 2Kathmandulow-cost sensorsBagmati Province, Nepal
    1796.3×
  3. 3CairoCairo, Egypt
    1756.0×
  4. 4CoyhaiqueAysén, Chile
    1735.8×
  5. 5TlaquepaqueJalisco, Mexico
    1715.6×
  6. 6Ubon RatchathaniUbon Ratchathani, Thailand
    1705.5×
  7. 7AthensAttica, Greece
    1695.4×
  8. 8HualpénBiobio, Chile
    1695.4×
  9. 9KhalándrionAttica, Greece
    1665.1×
  10. 10NanNan, Thailand
    1645.0×
  11. 11PhayaoPhayao, Thailand
    1644.9×
  12. 12Santa Anita - Los FicusLima region, Peru
    1634.9×
  13. 13VillarricaAraucania, Chile
    1634.9×
  14. 14Dhakalow-cost sensorsDhaka Division, Bangladesh
    1624.8×
  15. 15Mae SaiChiang Rai, Thailand
    1624.7×
  16. 16LampangLampang, Thailand
    1614.7×
  17. 17NacimientoBiobio, Chile
    1614.6×
  18. 18AcharnésAttica, Greece
    1614.6×
  19. 19San CarlosÑuble, Chile
    1594.4×
  20. 20UttaraditUttaradit, Thailand
    1584.3×
  21. 21Chiang MaiChiang Mai, Thailand
    1564.2×
  22. 22PiraeusAttica, Greece
    1564.2×
  23. 23HyderabadTelangana, India
    1554.1×
  24. 24Chiang RaiChiang Rai, Thailand
    1554.1×
  25. 24CuranilahueBiobio, Chile
    1554.1×
  26. 26HanoiHanoi, Vietnam
    1533.9×
  27. 27KolkataWest Bengal, India
    1523.8×
  28. 28PhraePhrae, Thailand
    1513.7×
  29. 29MukdahanMukdahan, Thailand
    1513.7×
  30. 30KalasinKalasin, Thailand
    1453.6×
  31. 31Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1443.5×
  32. 31HualquiBiobio, Chile
    1443.5×
  33. 33JakartaJakarta, Indonesia
    1433.5×
  34. 34SukhothaiSukhothai, Thailand
    1423.5×
  35. 34LamphunLamphun, Thailand
    1423.5×
  36. 36DelhiDelhi, India
    1393.4×
  37. 37ChillánÑuble, Chile
    1373.4×
  38. 38AguascalientesAguascalientes, Mexico
    1373.3×
  39. 39PhichitPhichit, Thailand
    1363.3×
  40. 39Los ÁngelesBiobio, Chile
    1363.3×
  41. 41Kamphaeng PhetKamphaeng Phet, Thailand
    1343.3×
  42. 42TemucoAraucania, Chile
    1313.2×
  43. 43CuricóMaule Region, Chile
    1293.1×
  44. 44TallahasseeFlorida, United States
    1283.1×
  45. 45LoeiLoei, Thailand
    1273.1×
  46. 46Amnat CharoenAmnat Charoen, Thailand
    1263.1×
  47. 47Vientianelow-cost sensorsVientiane Prefecture, Laos
    1263.0×
  48. 47OsornoLos Lagos Region, Chile
    1263.0×
  49. 49GuadalajaraJalisco, Mexico
    1253.0×
  50. 50Puerto AysénAysén, Chile
    1233.0×
  51. 51ValdiviaLos Ríos Region, Chile
    1233.0×
  52. 52PhetchabunPhetchabun, Thailand
    1222.9×
  53. 53YangonYangon, Myanmar
    1212.9×
  54. 54AsprópyrgosAttica, Greece
    1212.9×
  55. 55Udon ThaniUdon Thani, Thailand
    1192.9×
  56. 56Sakon NakhonSakon Nakhon, Thailand
    1172.8×
  57. 57Nong Bua LamphuNong Bua Lamphu, Thailand
    1152.8×
  58. 57TolucaMéxico, Mexico
    1152.8×
  59. 59Mae SotTak, Thailand
    1122.7×
  60. 59YasothonYasothon, Thailand
    1122.7×
  61. 59Nakhon SawanNakhon Sawan, Thailand
    1122.7×
  62. 62Chai NatChai Nat, Thailand
    1112.6×
  63. 63ChiguayanteBiobio, Chile
    1092.6×
  64. 64ZapopanJalisco, Mexico
    1082.6×
  65. 65KanchanaburiKanchanaburi, Thailand
    1072.5×
  66. 66TalcahuanoBiobio, Chile
    1042.4×
  67. 67CoronelBiobio, Chile
    1032.4×
  68. 68ToméBiobio, Chile
    1032.4×
  69. 68Puerto VarasLos Lagos Region, Chile
    1032.4×
  70. 70Sing BuriSing Buri, Thailand
    1022.4×
  71. 70Victoria de DurangoDurango, Mexico
    1022.4×
  72. 72BeijingBeijing, China
    1022.4×
  73. 73Khon KaenKhon Kaen, Thailand
    1012.4×
  74. 74Lop BuriLopburi, Thailand
    982.3×
  75. 75La UniónLos Ríos Region, Chile
    972.3×
  76. 76ChaiyaphumChaiyaphum, Thailand
    962.2×
  77. 77JeddahMecca Region, Saudi Arabia
    952.2×
  78. 77LimaLima Province, Peru
    952.2×
  79. 79Roi EtRoi Et, Thailand
    942.2×
  80. 80RatchaburiRatchaburi, Thailand
    932.1×
  81. 81SantiagoSantiago Metropolitan, Chile
    912.1×
  82. 82Santiago de QuerétaroQuerétaro, Mexico
    912.0×
  83. 83Jastrzębie ZdrójSilesia, Poland
    912.0×
  84. 84ConcepciónBiobio, Chile
    902.0×
  85. 85Bielsko-BialaSilesia, Poland
    902.0×
  86. 86BaghdadBaghdad, Iraq
    902.0×
  87. 87GuangzhouGuangdong, China
    902.0×
  88. 88Islamabadlow-cost sensorsIslamabad, Pakistan
    892.0×
  89. 88Villa Poeta José Gálvez BarrenecheaLima region, Peru
    892.0×
  90. 90PhuketPhuket, Thailand
    892.0×
  91. 90CauquenesMaule Region, Chile
    892.0×
  92. 92ValjevoCentral Serbia, Serbia
    892.0×
  93. 93Wan ChaiWan Chai, Hong Kong
    881.9×
  94. 94ShenyangLiaoning, China
    881.9×
  95. 94Abujalow-cost sensorsFCT, Nigeria
    881.9×
  96. 94ŁaskŁódź Voivodeship, Poland
    881.9×
  97. 97RacibórzSilesia, Poland
    881.9×
  98. 98AntananarivoAnalamanga, Madagascar
    871.9×
  99. 99KatowiceSilesia, Poland
    871.9×
  100. 100KourouGuyane, French Guiana
    861.9×
  101. 101RancaguaO'Higgins Region, Chile
    851.8×
  102. 101Jacobo HunterArequipa, Peru
    851.8×
  103. 103Puente AltoSantiago Metropolitan, Chile
    851.8×
  104. 104León de los AldamaGuanajuato, Mexico
    851.8×
  105. 105Suphan BuriSuphan Buri, Thailand
    851.8×
  106. 106Bang NaBangkok, Thailand
    841.8×
  107. 106MonterreyNuevo León, Mexico
    841.8×
  108. 108PhetchaburiPhetchaburi, Thailand
    841.8×
  109. 108Khlong Sam WaBangkok, Thailand
    841.8×
  110. 110ZgierzŁódź Voivodeship, Poland
    841.8×
  111. 111Nakhon PathomNakhon Pathom, Thailand
    831.8×
  112. 111ShanghaiShanghai, China
    831.8×
  113. 113Hua HinPrachuap Khiri Khan, Thailand
    831.8×
  114. 113IndioCalifornia, United States
    831.8×
  115. 115DębicaSubcarpathia, Poland
    831.8×
  116. 115SurinSurin, Thailand
    831.8×
  117. 115TalcaMaule Region, Chile
    831.8×
  118. 118RabinalBaja Verapaz, Guatemala
    831.7×
  119. 118San Pedro de la PazBiobio, Chile
    831.7×
  120. 120SaraburiSaraburi, Thailand
    831.7×
  121. 120ToruńKujawsko-Pomorskie, Poland
    831.7×
  122. 122RanongRanong province, Thailand
    821.7×
  123. 123Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    821.7×
  124. 123TalaganteSantiago Metropolitan, Chile
    821.7×
  125. 125Nakhon NayokNakhon Nayok, Thailand
    821.7×
  126. 126Novi PazarCentral Serbia, Serbia
    821.7×
  127. 126YongkangTaiwan, Taiwan
    821.7×
  128. 126CelayaGuanajuato, Mexico
    821.7×
  129. 129Mong KokYau Tsim Mong District, Hong Kong
    811.7×
  130. 130SatunSatun, Thailand
    811.7×
  131. 131SarajevoFederation of B&H, Bosnia and Herzegovina
    811.7×
  132. 132MumbaiMaharashtra, India
    811.7×
  133. 132TřinecMoravian-Silesian Region, Czechia
    811.7×
  134. 134KigaliKigali, Rwanda
    811.7×
  135. 134Addis AbabaAddis Ababa, Ethiopia
    811.7×
  136. 134QuillotaValparaiso, Chile
    811.7×
  137. 137KaliszGreater Poland, Poland
    801.7×
  138. 137BeneventoCampania, Italy
    801.7×
  139. 137IrapuatoGuanajuato, Mexico
    801.7×
  140. 140Si Maha PhotPrachin Buri, Thailand
    801.6×
  141. 141Kędzierzyn-KoźleOpole Voivodeship, Poland
    801.6×
  142. 142Nong KhaemBangkok, Thailand
    791.6×
  143. 142GdyniaPomerania, Poland
    791.6×
  144. 142Guatemala CityGuatemala, Guatemala
    791.6×
  145. 145Ban Samae DamBangkok, Thailand
    791.6×
  146. 146Khlong LuangPathum Thani, Thailand
    781.6×
  147. 146BeigangTaiwan, Taiwan
    781.6×
  148. 146Lake MaryFlorida, United States
    781.6×
  149. 149LęborkPomerania, Poland
    781.6×
  150. 150Phra PradaengSamut Prakan, Thailand
    781.6×
  151. 150WłocławekKujawsko-Pomorskie, Poland
    781.6×
  152. 150PoznańGreater Poland, Poland
    781.6×
  153. 153BangkokBangkok, Thailand
    781.6×
  154. 154Sham Shui PoSham Shui Po District, Hong Kong
    771.5×
  155. 155Czechowice-DziedziceSilesia, Poland
    771.5×
  156. 156KościanGreater Poland, Poland
    771.5×
  157. 157FengshanTakao, Taiwan
    771.5×
  158. 158Surat ThaniSurat Thani, Thailand
    761.5×
  159. 158Zielona GóraLubusz, Poland
    761.5×
  160. 158KrakówLesser Poland, Poland
    761.5×
  161. 161ErlunTaiwan, Taiwan
    761.5×
  162. 161OpoleOpole Voivodeship, Poland
    761.5×
  163. 163BakuBaki, Azerbaijan
    751.5×
  164. 163TainanTaiwan, Taiwan
    751.5×
  165. 163KłodzkoLower Silesia, Poland
    751.5×
  166. 163QuinteroValparaiso, Chile
    751.5×
  167. 167OtwockMazovia, Poland
    751.5×
  168. 168Mueang NonthaburiNonthaburi, Thailand
    751.5×
  169. 168Valašské MeziříčíZlín, Czechia
    751.5×
  170. 170DushanbeDushanbe, Tajikistan
    751.5×
  171. 170ErlinTaiwan, Taiwan
    751.5×
  172. 170KutnoŁódź Voivodeship, Poland
    751.5×
  173. 170CieszynSilesia, Poland
    751.5×
  174. 174PruszkówMazovia, Poland
    751.5×
  175. 175TaibaoTaiwan, Taiwan
    741.4×
  176. 176Lak SiBangkok, Thailand
    741.4×
  177. 177Frýdek-MístekMoravian-Silesian Region, Czechia
    741.4×
  178. 177Viña del MarValparaiso, Chile
    741.4×
  179. 179Nong ChokBangkok, Thailand
    741.4×
  180. 179San Francisco De BorjaLima region, Peru
    741.4×
  181. 181KościerzynaPomerania, Poland
    731.4×
  182. 181Khan Na YaoBangkok, Thailand
    731.4×
  183. 183Samut PrakanSamut Prakan, Thailand
    731.4×
  184. 183ChaozhouTaiwan, Taiwan
    731.4×
  185. 183GdańskPomerania, Poland
    731.4×
  186. 186Gorzów WielkopolskiLubusz, Poland
    731.4×
  187. 187LazarevacCentral Serbia, Serbia
    731.4×
  188. 187ZhushanTaiwan, Taiwan
    731.4×
  189. 189DouliuTaiwan, Taiwan
    721.4×
  190. 189XinyingTaiwan, Taiwan
    721.4×
  191. 191ŻyrardówMazovia, Poland
    721.4×
  192. 191Skarżysko-KamiennaŚwiętokrzyskie, Poland
    721.4×
  193. 191São PauloSão Paulo, Brazil
    721.4×
  194. 191Puerto MonttLos Lagos Region, Chile
    721.4×
  195. 195Chiayi CityTaiwan, Taiwan
    721.4×
  196. 195SzczecinWest Pomerania, Poland
    721.4×
  197. 195BydgoszczKujawsko-Pomorskie, Poland
    721.4×
  198. 195Ciudad Benito JuárezNuevo León, Mexico
    721.4×
  199. 199Samut SakhonSamut Sakhon, Thailand
    721.3×
  200. 200OstravaMoravian-Silesian Region, Czechia
    711.3×

Top 200 of 2,166 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, April 24, 2024, smogrank.com/history/2024-04-24 (accessed 3 Oct 2026).

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