SmogRank / History / April 25, 2024

Most polluted cities on April 25, 2024

2,263 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 279.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during April 25, 2024. All episodes.

← N'Djamena 279.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for April 25, 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
    40818.6×
  2. 2Kathmandulow-cost sensorsBagmati Province, Nepal
    1887.3×
  3. 3CairoCairo, Egypt
    1806.5×
  4. 4Lahorelow-cost sensorsPunjab, Pakistan
    1756.0×
  5. 5Ubon RatchathaniUbon Ratchathani, Thailand
    1705.5×
  6. 6Dhakalow-cost sensorsDhaka Division, Bangladesh
    1705.5×
  7. 7BeijingBeijing, China
    1685.3×
  8. 8DelhiDelhi, India
    1665.1×
  9. 9Ciudad JuárezChihuahua, Mexico
    1665.1×
  10. 10Santa Anita - Los FicusLima region, Peru
    1655.1×
  11. 11TlaquepaqueJalisco, Mexico
    1655.0×
  12. 12Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1604.5×
  13. 13SocorroTexas, United States
    1594.4×
  14. 14KalasinKalasin, Thailand
    1564.2×
  15. 15CoyhaiqueAysén, Chile
    1564.2×
  16. 16NanNan, Thailand
    1554.1×
  17. 17Chiang MaiChiang Mai, Thailand
    1554.1×
  18. 18MukdahanMukdahan, Thailand
    1533.9×
  19. 19LampangLampang, Thailand
    1523.8×
  20. 20UttaraditUttaradit, Thailand
    1523.8×
  21. 21HualpénBiobio, Chile
    1513.7×
  22. 22PhayaoPhayao, Thailand
    1503.7×
  23. 23KolkataWest Bengal, India
    1483.6×
  24. 24Zacatepec de HidalgoMorelos, Mexico
    1473.6×
  25. 25HanoiHanoi, Vietnam
    1443.5×
  26. 26Amnat CharoenAmnat Charoen, Thailand
    1433.5×
  27. 27PhichitPhichit, Thailand
    1413.5×
  28. 28CholulaPuebla, Mexico
    1393.4×
  29. 29TuxtlaChiapas, Mexico
    1383.4×
  30. 30PhraePhrae, Thailand
    1363.3×
  31. 31SukhothaiSukhothai, Thailand
    1343.3×
  32. 32LamphunLamphun, Thailand
    1343.3×
  33. 33Chiang RaiChiang Rai, Thailand
    1283.1×
  34. 34Mae SaiChiang Rai, Thailand
    1273.1×
  35. 35YasothonYasothon, Thailand
    1212.9×
  36. 35Puerto AysénAysén, Chile
    1212.9×
  37. 37HyderabadTelangana, India
    1202.9×
  38. 38GuadalajaraJalisco, Mexico
    1192.8×
  39. 39Mae SotTak, Thailand
    1152.7×
  40. 40Kamphaeng PhetKamphaeng Phet, Thailand
    1142.7×
  41. 41Vientianelow-cost sensorsVientiane Prefecture, Laos
    1142.7×
  42. 42Sakon NakhonSakon Nakhon, Thailand
    1132.7×
  43. 43LoeiLoei, Thailand
    1122.7×
  44. 44Udon ThaniUdon Thani, Thailand
    1082.5×
  45. 45PhetchabunPhetchabun, Thailand
    1072.5×
  46. 46YangonYangon, Myanmar
    1032.4×
  47. 47BaghdadBaghdad, Iraq
    1032.4×
  48. 48TallahasseeFlorida, United States
    1022.4×
  49. 49Santiago de QuerétaroQuerétaro, Mexico
    1022.4×
  50. 50OsornoLos Lagos Region, Chile
    1022.4×
  51. 51CuernavacaMorelos, Mexico
    1022.4×
  52. 52CuricóMaule Region, Chile
    1012.4×
  53. 53Si Sa KetSi Sa Ket, Thailand
    1012.4×
  54. 53JakartaJakarta, Indonesia
    1012.4×
  55. 55NacimientoBiobio, Chile
    992.3×
  56. 56Nong Bua LamphuNong Bua Lamphu, Thailand
    992.3×
  57. 57Roi EtRoi Et, Thailand
    992.3×
  58. 58CuranilahueBiobio, Chile
    982.3×
  59. 59LimaLima Province, Peru
    982.3×
  60. 60Ciudad Benito JuárezNuevo León, Mexico
    972.3×
  61. 61YeojuGyeonggi-do, South Korea
    972.2×
  62. 62Nakhon SawanNakhon Sawan, Thailand
    962.2×
  63. 63HualquiBiobio, Chile
    952.2×
  64. 64ValjevoCentral Serbia, Serbia
    942.1×
  65. 65San ClementeIca, Peru
    942.1×
  66. 66Khon KaenKhon Kaen, Thailand
    932.1×
  67. 67Kampalalow-cost sensorsCentral Region, Uganda
    922.1×
  68. 68JinchengFukien, Taiwan
    912.1×
  69. 68PubalGyeonggi-do, South Korea
    912.1×
  70. 70Villa Poeta José Gálvez BarrenecheaLima region, Peru
    912.0×
  71. 71Lop BuriLopburi, Thailand
    902.0×
  72. 72PoznańGreater Poland, Poland
    892.0×
  73. 73KościanGreater Poland, Poland
    892.0×
  74. 74ChillánÑuble, Chile
    892.0×
  75. 75PhuketPhuket, Thailand
    892.0×
  76. 76KanchanaburiKanchanaburi, Thailand
    881.9×
  77. 76Chai NatChai Nat, Thailand
    881.9×
  78. 76LęborkPomerania, Poland
    881.9×
  79. 79CelayaGuanajuato, Mexico
    881.9×
  80. 80ChaiyaphumChaiyaphum, Thailand
    881.9×
  81. 81Los ÁngelesBiobio, Chile
    881.9×
  82. 82AugustaGeorgia, United States
    881.9×
  83. 83TemucoAraucania, Chile
    881.9×
  84. 84BizenOkayama, Japan
    871.9×
  85. 85Nakhon RatchasimaNakhon Ratchasima, Thailand
    861.9×
  86. 86RancaguaO'Higgins Region, Chile
    861.9×
  87. 87San CarlosÑuble, Chile
    861.9×
  88. 87La UniónLos Ríos Region, Chile
    861.9×
  89. 89SurinSurin, Thailand
    851.8×
  90. 89AguascalientesAguascalientes, Mexico
    851.8×
  91. 91DębicaSubcarpathia, Poland
    851.8×
  92. 91SuwonGyeonggi-do, South Korea
    851.8×
  93. 91ShenyangLiaoning, China
    851.8×
  94. 91QuillotaValparaiso, Chile
    851.8×
  95. 91Jacobo HunterArequipa, Peru
    851.8×
  96. 96SantiagoSantiago Metropolitan, Chile
    851.8×
  97. 97OsanGyeonggi-do, South Korea
    851.8×
  98. 98Skarżysko-KamiennaŚwiętokrzyskie, Poland
    851.8×
  99. 99Sing BuriSing Buri, Thailand
    841.8×
  100. 100MonterreyNuevo León, Mexico
    841.8×
  101. 101Mixquiahuala de JuárezHidalgo, Mexico
    841.8×
  102. 102Islamabadlow-cost sensorsIslamabad, Pakistan
    831.8×
  103. 103AntananarivoAnalamanga, Madagascar
    821.7×
  104. 103SatunSatun, Thailand
    821.7×
  105. 105Karachilow-cost sensorsSindh, Pakistan
    821.7×
  106. 105Icheon-siGyeonggi-do, South Korea
    821.7×
  107. 105Ciudad ApodacaNuevo León, Mexico
    821.7×
  108. 108ObrenovacCentral Serbia, Serbia
    821.7×
  109. 108KourouGuyane, French Guiana
    821.7×
  110. 110RanongRanong province, Thailand
    821.7×
  111. 111Addis AbabaAddis Ababa, Ethiopia
    821.7×
  112. 111BelmopanCayo District, Belize
    821.7×
  113. 113LazarevacCentral Serbia, Serbia
    811.7×
  114. 114ZemunCentral Serbia, Serbia
    811.7×
  115. 115El PasoTexas, United States
    811.7×
  116. 116MexicaliBaja California, Mexico
    811.7×
  117. 116León de los AldamaGuanajuato, Mexico
    811.7×
  118. 118Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    811.7×
  119. 118Ansan-siGyeonggi-do, South Korea
    811.7×
  120. 118ZgierzŁódź Voivodeship, Poland
    811.7×
  121. 118KutnoŁódź Voivodeship, Poland
    811.7×
  122. 118VillarricaAraucania, Chile
    811.7×
  123. 123UžiceCentral Serbia, Serbia
    801.6×
  124. 124RatchaburiRatchaburi, Thailand
    801.6×
  125. 125KościerzynaPomerania, Poland
    791.6×
  126. 126Puente AltoSantiago Metropolitan, Chile
    791.6×
  127. 127PančevoVojvodina, Serbia
    791.6×
  128. 127WłocławekKujawsko-Pomorskie, Poland
    791.6×
  129. 129SmederevoCentral Serbia, Serbia
    791.6×
  130. 129DushanbeDushanbe, Tajikistan
    791.6×
  131. 129Victoria de DurangoDurango, Mexico
    791.6×
  132. 132San Francisco De BorjaLima region, Peru
    791.6×
  133. 133Gimpo-siGyeonggi-do, South Korea
    781.6×
  134. 134TalaganteSantiago Metropolitan, Chile
    781.6×
  135. 135JarosławSubcarpathia, Poland
    781.6×
  136. 135MumbaiMaharashtra, India
    781.6×
  137. 135PyeongtaekGyeonggi-do, South Korea
    781.6×
  138. 138QuinteroValparaiso, Chile
    781.6×
  139. 138CoronelBiobio, Chile
    781.6×
  140. 140ŻyrardówMazovia, Poland
    771.6×
  141. 141Si Maha PhotPrachin Buri, Thailand
    771.5×
  142. 142BelgradeCentral Serbia, Serbia
    771.5×
  143. 142SeonghwanChungcheongnam-do, South Korea
    771.5×
  144. 142Anyang-siGyeonggi-do, South Korea
    771.5×
  145. 142Santa CatarinaNuevo León, Mexico
    771.5×
  146. 146ColomboWestern Province, Sri Lanka
    771.5×
  147. 146Buri RamBuriram, Thailand
    771.5×
  148. 146PueblaPuebla, Mexico
    771.5×
  149. 149SarajevoFederation of B&H, Bosnia and Herzegovina
    761.5×
  150. 150IncheonIncheon, South Korea
    761.5×
  151. 151KragujevacCentral Serbia, Serbia
    751.5×
  152. 151Viña del MarValparaiso, Chile
    751.5×
  153. 151Puerto VarasLos Lagos Region, Chile
    751.5×
  154. 154NišCentral Serbia, Serbia
    751.5×
  155. 154TangjinChungcheongnam-do, South Korea
    751.5×
  156. 156PruszkówMazovia, Poland
    741.4×
  157. 156EdinburgTexas, United States
    741.4×
  158. 158NiskoSubcarpathia, Poland
    741.4×
  159. 158DziałdowoWarmia-Masuria, Poland
    741.4×
  160. 158Bucheon-siGyeonggi-do, South Korea
    741.4×
  161. 158GwangmyeongGyeonggi-do, South Korea
    741.4×
  162. 162Cadereyta JiménezNuevo León, Mexico
    741.4×
  163. 162MissionTexas, United States
    741.4×
  164. 164JeddahMecca Region, Saudi Arabia
    741.4×
  165. 164Abujalow-cost sensorsFCT, Nigeria
    741.4×
  166. 166Seongnam-siGyeonggi-do, South Korea
    741.4×
  167. 166HwadoGyeonggi-do, South Korea
    741.4×
  168. 166ŁaskŁódź Voivodeship, Poland
    741.4×
  169. 166CalamaAntofagasta, Chile
    741.4×
  170. 170StarachowiceŚwiętokrzyskie, Poland
    741.4×
  171. 170Goyang-siGyeonggi-do, South Korea
    741.4×
  172. 170ToruńKujawsko-Pomorskie, Poland
    741.4×
  173. 170KatowiceSilesia, Poland
    741.4×
  174. 174RadomMazovia, Poland
    731.4×
  175. 174LublinLublin, Poland
    731.4×
  176. 176Novi PazarCentral Serbia, Serbia
    731.4×
  177. 176SzczecinWest Pomerania, Poland
    731.4×
  178. 178ČačakCentral Serbia, Serbia
    731.4×
  179. 178Wan ChaiWan Chai, Hong Kong
    731.4×
  180. 178WŏnjuGangwon-do, South Korea
    731.4×
  181. 178GdyniaPomerania, Poland
    731.4×
  182. 178Puerto MonttLos Lagos Region, Chile
    731.4×
  183. 178ConcónValparaiso, Chile
    731.4×
  184. 184Suphan BuriSuphan Buri, Thailand
    721.4×
  185. 184PattaniPattani, Thailand
    721.4×
  186. 184Bang NaBangkok, Thailand
    721.4×
  187. 187GwangjuGyeonggi-do, South Korea
    721.4×
  188. 187AlbanyGeorgia, United States
    721.4×
  189. 189IrapuatoGuanajuato, Mexico
    721.4×
  190. 190SiedlceMazovia, Poland
    721.4×
  191. 190SaraburiSaraburi, Thailand
    721.4×
  192. 190Nakhon NayokNakhon Nayok, Thailand
    721.4×
  193. 193ZamośćLublin, Poland
    721.3×
  194. 193PohangGyeongsangbuk-do, South Korea
    721.3×
  195. 193AricaArica y Parinacota Region, Chile
    721.3×
  196. 196RabinalBaja Verapaz, Guatemala
    711.3×
  197. 196ChimboteAncash, Peru
    711.3×
  198. 198KraljevoCentral Serbia, Serbia
    711.3×
  199. 198PhetchaburiPhetchaburi, Thailand
    711.3×
  200. 198Guatemala CityGuatemala, Guatemala
    711.3×

Top 200 of 2,263 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 25, 2024, smogrank.com/history/2024-04-25 (accessed 3 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.