SmogRank / History / April 30, 2024

Most polluted cities on April 30, 2024

2,332 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 578.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during April 30, 2024. All episodes.

← N'Djamena 578.0 µg/m³ 500 µg/m³15 WHO 24-hour guideline
Every city ranked for April 30, 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
    500+38.5×
  2. 2Kathmandulow-cost sensorsBagmati Province, Nepal
    1907.4×
  3. 3Ubon RatchathaniUbon Ratchathani, Thailand
    1766.1×
  4. 4NanNan, Thailand
    1685.4×
  5. 5PhayaoPhayao, Thailand
    1685.3×
  6. 6Mae SaiChiang Rai, Thailand
    1685.3×
  7. 6Chiang MaiChiang Mai, Thailand
    1685.3×
  8. 8TlaquepaqueJalisco, Mexico
    1634.8×
  9. 9LampangLampang, Thailand
    1634.8×
  10. 10Vientianelow-cost sensorsVientiane Prefecture, Laos
    1614.7×
  11. 11Santa Anita - Los FicusLima region, Peru
    1614.6×
  12. 12Dhakalow-cost sensorsDhaka Division, Bangladesh
    1604.6×
  13. 13Chiang RaiChiang Rai, Thailand
    1604.6×
  14. 14HanoiHanoi, Vietnam
    1584.3×
  15. 15UttaraditUttaradit, Thailand
    1523.8×
  16. 16LamphunLamphun, Thailand
    1513.7×
  17. 17LoeiLoei, Thailand
    1493.7×
  18. 18KolkataWest Bengal, India
    1433.5×
  19. 19DelhiDelhi, India
    1413.5×
  20. 20Kamphaeng PhetKamphaeng Phet, Thailand
    1403.4×
  21. 21KalasinKalasin, Thailand
    1373.4×
  22. 22MukdahanMukdahan, Thailand
    1373.3×
  23. 23Lahorelow-cost sensorsPunjab, Pakistan
    1363.3×
  24. 24PhraePhrae, Thailand
    1353.3×
  25. 25Puerto VarasLos Lagos Region, Chile
    1333.2×
  26. 26SukhothaiSukhothai, Thailand
    1323.2×
  27. 27BurgosCastille and León, Spain
    1323.2×
  28. 28Nong Bua LamphuNong Bua Lamphu, Thailand
    1283.1×
  29. 29Mae SotTak, Thailand
    1273.1×
  30. 30Puerto AysénAysén, Chile
    1263.0×
  31. 31Udon ThaniUdon Thani, Thailand
    1253.0×
  32. 31Amnat CharoenAmnat Charoen, Thailand
    1253.0×
  33. 33ĆuprijaCentral Serbia, Serbia
    1222.9×
  34. 34Sakon NakhonSakon Nakhon, Thailand
    1212.9×
  35. 35KanchanaburiKanchanaburi, Thailand
    1202.9×
  36. 36PhetchabunPhetchabun, Thailand
    1182.8×
  37. 37San Luis PotosíSan Luis Potosí, Mexico
    1182.8×
  38. 38Si Sa KetSi Sa Ket, Thailand
    1152.7×
  39. 38JakartaJakarta, Indonesia
    1152.7×
  40. 38OsornoLos Lagos Region, Chile
    1152.7×
  41. 41ShenyangLiaoning, China
    1132.7×
  42. 42YasothonYasothon, Thailand
    1122.7×
  43. 43TehuacánPuebla, Mexico
    1122.7×
  44. 44HyderabadTelangana, India
    1102.6×
  45. 44Ciudad JuárezChihuahua, Mexico
    1102.6×
  46. 46Karachilow-cost sensorsSindh, Pakistan
    1102.6×
  47. 46YangonYangon, Myanmar
    1102.6×
  48. 48SeonghwanChungcheongnam-do, South Korea
    1092.6×
  49. 49CairoCairo, Egypt
    1072.5×
  50. 49CoyhaiqueAysén, Chile
    1072.5×
  51. 51Goyang-siGyeonggi-do, South Korea
    1042.5×
  52. 52Puerto MonttLos Lagos Region, Chile
    1032.4×
  53. 53RatchaburiRatchaburi, Thailand
    1022.4×
  54. 54Gimpo-siGyeonggi-do, South Korea
    1002.4×
  55. 55YeojuGyeonggi-do, South Korea
    1002.3×
  56. 56TangjinChungcheongnam-do, South Korea
    992.3×
  57. 56PyeongtaekGyeonggi-do, South Korea
    992.3×
  58. 58VillarricaAraucania, Chile
    982.3×
  59. 59Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    982.3×
  60. 59SeoulSeoul, South Korea
    982.3×
  61. 61NacimientoBiobio, Chile
    972.3×
  62. 62Hwaseong-siGyeonggi-do, South Korea
    972.3×
  63. 63Ansan-siGyeonggi-do, South Korea
    972.2×
  64. 63Ciudad ApodacaNuevo León, Mexico
    972.2×
  65. 65Uijeongbu-siGyeonggi-do, South Korea
    962.2×
  66. 65Bucheon-siGyeonggi-do, South Korea
    962.2×
  67. 67GwangmyeongGyeonggi-do, South Korea
    962.2×
  68. 68Nakhon PathomNakhon Pathom, Thailand
    952.2×
  69. 68Guri-siGyeonggi-do, South Korea
    952.2×
  70. 68IncheonIncheon, South Korea
    952.2×
  71. 68Icheon-siGyeonggi-do, South Korea
    952.2×
  72. 72LimaLima Province, Peru
    942.2×
  73. 73OsanGyeonggi-do, South Korea
    942.1×
  74. 74Jacobo HunterArequipa, Peru
    932.1×
  75. 75PubalGyeonggi-do, South Korea
    932.1×
  76. 76Abujalow-cost sensorsFCT, Nigeria
    932.1×
  77. 77Nakhon SawanNakhon Sawan, Thailand
    932.1×
  78. 78Sing BuriSing Buri, Thailand
    922.1×
  79. 78Roi EtRoi Et, Thailand
    922.1×
  80. 78PhichitPhichit, Thailand
    922.1×
  81. 81Anyang-siGyeonggi-do, South Korea
    922.1×
  82. 82Chai NatChai Nat, Thailand
    922.1×
  83. 83São PauloSão Paulo, Brazil
    922.1×
  84. 84AsanChungcheongnam-do, South Korea
    912.1×
  85. 85Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    912.0×
  86. 85NamyangjuGyeonggi-do, South Korea
    912.0×
  87. 87RengoO'Higgins Region, Chile
    902.0×
  88. 88Suphan BuriSuphan Buri, Thailand
    902.0×
  89. 89ShanghaiShanghai, China
    902.0×
  90. 90Ganghwa-gunIncheon, South Korea
    892.0×
  91. 91Lop BuriLopburi, Thailand
    881.9×
  92. 91San Luis de la PazGuanajuato, Mexico
    881.9×
  93. 93GunsanJeollabuk-do, South Korea
    881.9×
  94. 94SuwonGyeonggi-do, South Korea
    871.9×
  95. 94Tepeji del Río de OcampoHidalgo, Mexico
    871.9×
  96. 96HanamGyeonggi-do, South Korea
    871.9×
  97. 96CauquenesMaule Region, Chile
    871.9×
  98. 98Nakhon RatchasimaNakhon Ratchasima, Thailand
    871.9×
  99. 98ChaiyaphumChaiyaphum, Thailand
    871.9×
  100. 100YesanChungcheongnam-do, South Korea
    861.9×
  101. 100AnseongGyeonggi-do, South Korea
    861.9×
  102. 102Ulan BatorUlaanbaatar, Mongolia
    861.9×
  103. 103SinanJeollanam-do, South Korea
    851.8×
  104. 104HualquiBiobio, Chile
    851.8×
  105. 105BaghdadBaghdad, Iraq
    851.8×
  106. 105Şabāḩ as SālimMubārak al Kabīr, Kuwait
    851.8×
  107. 107Kampalalow-cost sensorsCentral Region, Uganda
    841.8×
  108. 108Nong KhaemBangkok, Thailand
    841.8×
  109. 109IksanJeollabuk-do, South Korea
    831.8×
  110. 109HwadoGyeonggi-do, South Korea
    831.8×
  111. 111PhetchaburiPhetchaburi, Thailand
    831.8×
  112. 111WŏnjuGangwon-do, South Korea
    831.8×
  113. 111WabuGyeonggi-do, South Korea
    831.8×
  114. 114Chinch'ŏnNorth Chungcheong, South Korea
    831.7×
  115. 115JeddahMecca Region, Saudi Arabia
    831.7×
  116. 115Seongnam-siGyeonggi-do, South Korea
    831.7×
  117. 117ImsilJeollabuk-do, South Korea
    821.7×
  118. 118MunsanGyeonggi-do, South Korea
    821.7×
  119. 118JangheungJeollanam-do, South Korea
    821.7×
  120. 120BensalemPennsylvania, United States
    821.7×
  121. 121DamyangJeollanam-do, South Korea
    821.7×
  122. 121BuanJeollabuk-do, South Korea
    821.7×
  123. 123YangjuGyeonggi-do, South Korea
    821.7×
  124. 124HongseongChungcheongnam-do, South Korea
    821.7×
  125. 125GwangjuGyeonggi-do, South Korea
    811.7×
  126. 125Koch'angJeollabuk-do, South Korea
    811.7×
  127. 127KinzanChungcheongnam-do, South Korea
    811.7×
  128. 127Guatemala CityGuatemala, Guatemala
    811.7×
  129. 129Hua HinPrachuap Khiri Khan, Thailand
    801.7×
  130. 130KimjeJeollabuk-do, South Korea
    801.6×
  131. 130ValdiviaLos Ríos Region, Chile
    801.6×
  132. 130ChillánÑuble, Chile
    801.6×
  133. 130San Miguel de AllendeGuanajuato, Mexico
    801.6×
  134. 134RabinalBaja Verapaz, Guatemala
    791.6×
  135. 135BakuBaki, Azerbaijan
    791.6×
  136. 135Yangp'yŏngGyeonggi-do, South Korea
    791.6×
  137. 137Ban Samae DamBangkok, Thailand
    781.6×
  138. 138León de los AldamaGuanajuato, Mexico
    781.6×
  139. 139YŏnmuChungcheongnam-do, South Korea
    781.6×
  140. 140JeongeupJeollabuk-do, South Korea
    781.6×
  141. 141NipomoCalifornia, United States
    781.6×
  142. 142KoesanNorth Chungcheong, South Korea
    771.6×
  143. 142HaenamJeollanam-do, South Korea
    771.6×
  144. 142CoronelBiobio, Chile
    771.6×
  145. 142SpartanburgSouth Carolina, United States
    771.6×
  146. 146CheonanChungcheongnam-do, South Korea
    771.5×
  147. 146ŻabbarĦaż-Żabbar, Malta
    771.5×
  148. 148Nakhon NayokNakhon Nayok, Thailand
    771.5×
  149. 148AricaArica y Parinacota Region, Chile
    771.5×
  150. 148Villa Poeta José Gálvez BarrenecheaLima region, Peru
    771.5×
  151. 151NamsaJeollabuk-do, South Korea
    771.5×
  152. 151YeongamJeollanam-do, South Korea
    771.5×
  153. 153TemucoAraucania, Chile
    761.5×
  154. 153CelayaGuanajuato, Mexico
    761.5×
  155. 155MokpoJeollanam-do, South Korea
    761.5×
  156. 155San ClementeIca, Peru
    761.5×
  157. 157JungpyongNorth Chungcheong, South Korea
    761.5×
  158. 157Puente AltoSantiago Metropolitan, Chile
    761.5×
  159. 159Khlong LuangPathum Thani, Thailand
    761.5×
  160. 159Bang NaBangkok, Thailand
    761.5×
  161. 159WanjuJeollabuk-do, South Korea
    761.5×
  162. 162SarajevoFederation of B&H, Bosnia and Herzegovina
    761.5×
  163. 162CopiapóAtacama, Chile
    761.5×
  164. 164ChocopeLa Libertad, Peru
    751.5×
  165. 165JangseongJeollanam-do, South Korea
    751.5×
  166. 166PhuketPhuket, Thailand
    751.5×
  167. 167BangkokBangkok, Thailand
    751.5×
  168. 168Eagle PassTexas, United States
    751.5×
  169. 169CheorwonGangwon-do, South Korea
    741.4×
  170. 170Mueang NonthaburiNonthaburi, Thailand
    741.4×
  171. 170MuanJeollanam-do, South Korea
    741.4×
  172. 170IrapuatoGuanajuato, Mexico
    741.4×
  173. 173ToruńKujawsko-Pomorskie, Poland
    741.4×
  174. 173Falconara MarittimaThe Marches, Italy
    741.4×
  175. 173AntofagastaAntofagasta, Chile
    741.4×
  176. 176SeosanChungcheongnam-do, South Korea
    741.4×
  177. 176Lak SiBangkok, Thailand
    741.4×
  178. 178Jeju CityJeju-do, South Korea
    741.4×
  179. 179MasanGwangju, South Korea
    741.4×
  180. 180Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    731.4×
  181. 180YeongdongNorth Chungcheong, South Korea
    731.4×
  182. 180JeonjuJeollabuk-do, South Korea
    731.4×
  183. 183BoryeongChungcheongnam-do, South Korea
    731.4×
  184. 183HualpénBiobio, Chile
    731.4×
  185. 185EwingNew Jersey, United States
    721.4×
  186. 186RanongRanong province, Thailand
    721.4×
  187. 187MaputoMaputo City, Mozambique
    721.3×
  188. 187AlessandriaPiedmont, Italy
    721.3×
  189. 189TocopillaAntofagasta, Chile
    711.3×
  190. 189Arroyo GrandeCalifornia, United States
    711.3×
  191. 191ChungjuNorth Chungcheong, South Korea
    711.3×
  192. 191MissionTexas, United States
    711.3×
  193. 193SaraburiSaraburi, Thailand
    711.3×
  194. 194PattaniPattani, Thailand
    711.3×
  195. 194TalcahuanoBiobio, Chile
    711.3×
  196. 196Ban Khlong PrawetBangkok, Thailand
    711.3×
  197. 196GwangjuGwangju, South Korea
    711.3×
  198. 198DaejeonDaejeon, South Korea
    711.3×
  199. 198TumbaStockholm, Sweden
    711.3×
  200. 200TimaruCanterbury, New Zealand
    701.3×

Top 200 of 2,332 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 30, 2024, smogrank.com/history/2024-04-30 (accessed 3 Oct 2026).

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