SmogRank / History / April 18, 2024

Most polluted cities on April 18, 2024

2,397 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 153.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during April 18, 2024. All episodes.

← N'Djamena 153.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for April 18, 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
    22810.2×
  2. 2CairoCairo, Egypt
    1846.8×
  3. 3Kathmandulow-cost sensorsBagmati Province, Nepal
    1806.4×
  4. 4GyeongjuGyeongsangbuk-do, South Korea
    1776.2×
  5. 5Santa Anita - Los FicusLima region, Peru
    1735.8×
  6. 6OsornoLos Lagos Region, Chile
    1715.6×
  7. 7Chiang MaiChiang Mai, Thailand
    1695.4×
  8. 8Ciudad JuárezChihuahua, Mexico
    1665.2×
  9. 9GijangBusan, South Korea
    1634.9×
  10. 9TsushimaNagasaki, Japan
    1634.9×
  11. 11YoshiokaMiyagi, Japan
    1624.7×
  12. 12BusanBusan, South Korea
    1614.6×
  13. 13UngsangGyeongsangnam-do, South Korea
    1614.6×
  14. 14NanNan, Thailand
    1594.5×
  15. 15UlsanUlsan, South Korea
    1594.5×
  16. 16PhayaoPhayao, Thailand
    1594.5×
  17. 16PohangGyeongsangbuk-do, South Korea
    1594.5×
  18. 18Chiang RaiChiang Rai, Thailand
    1594.4×
  19. 19LamphunLamphun, Thailand
    1594.4×
  20. 20AmagasakiHyōgo, Japan
    1594.4×
  21. 21KimhaeGyeongsangnam-do, South Korea
    1584.3×
  22. 22YeonilGyeongsangbuk-do, South Korea
    1574.3×
  23. 23SokchoGangwon-do, South Korea
    1574.2×
  24. 23IwanumaMiyagi, Japan
    1574.2×
  25. 25Dhakalow-cost sensorsDhaka Division, Bangladesh
    1564.2×
  26. 26Mae SaiChiang Rai, Thailand
    1564.2×
  27. 26SinhyeonGyeongsangnam-do, South Korea
    1564.2×
  28. 28SōmaFukushima, Japan
    1564.2×
  29. 29HyderabadTelangana, India
    1564.1×
  30. 29YangsanGyeongsangnam-do, South Korea
    1564.1×
  31. 29TamanoOkayama, Japan
    1564.1×
  32. 32LampangLampang, Thailand
    1554.1×
  33. 32ShiroishiMiyagi, Japan
    1554.1×
  34. 34BeijingBeijing, China
    1554.1×
  35. 35MukdahanMukdahan, Thailand
    1554.1×
  36. 36Natori-shiMiyagi, Japan
    1554.1×
  37. 37Donghae CityGangwon-do, South Korea
    1554.1×
  38. 38DelhiDelhi, India
    1554.1×
  39. 39KobeHyōgo, Japan
    1554.0×
  40. 40AridaWakayama, Japan
    1544.0×
  41. 41ÖstersundJämtland, Sweden
    1544.0×
  42. 42MiryangGyeongsangnam-do, South Korea
    1544.0×
  43. 43KalasinKalasin, Thailand
    1544.0×
  44. 44EisenGyeongsangbuk-do, South Korea
    1544.0×
  45. 45TongyeongGyeongsangnam-do, South Korea
    1543.9×
  46. 46UttaraditUttaradit, Thailand
    1533.9×
  47. 47NishinomiyaHyōgo, Japan
    1533.9×
  48. 48HayangGyeongsangbuk-do, South Korea
    1533.9×
  49. 49AkashiHyōgo, Japan
    1523.8×
  50. 49FukuyamaHiroshima, Japan
    1523.8×
  51. 51MatsushimaMiyagi, Japan
    1523.8×
  52. 52ŌsakiMiyagi, Japan
    1523.8×
  53. 52SugaiKyoto, Japan
    1523.8×
  54. 54MinatoWakayama, Japan
    1523.8×
  55. 55Ubon RatchathaniUbon Ratchathani, Thailand
    1513.7×
  56. 56TlaquepaqueJalisco, Mexico
    1513.7×
  57. 57Tagajō-shiMiyagi, Japan
    1513.7×
  58. 58HōryūjiNara, Japan
    1503.7×
  59. 59SantyokuGangwon-do, South Korea
    1503.7×
  60. 59TakahashiOkayama, Japan
    1503.7×
  61. 61YeonggwangJeollanam-do, South Korea
    1493.7×
  62. 62Gyeongsan-siGyeongsangbuk-do, South Korea
    1483.6×
  63. 63PhraePhrae, Thailand
    1483.6×
  64. 63YawataKyoto, Japan
    1483.6×
  65. 65ChangwonGyeongsangnam-do, South Korea
    1483.6×
  66. 66IwadeWakayama, Japan
    1473.6×
  67. 67KameyamaMie, Japan
    1473.6×
  68. 68KolkataWest Bengal, India
    1463.6×
  69. 68TenriNara, Japan
    1463.6×
  70. 70IshinomakiMiyagi, Japan
    1453.6×
  71. 70SadoNiigata, Japan
    1453.6×
  72. 72NaesŏGyeongsangnam-do, South Korea
    1453.6×
  73. 73Kakogawachō-honmachiHyōgo, Japan
    1453.5×
  74. 73SendaiMiyagi, Japan
    1453.5×
  75. 75CholulaPuebla, Mexico
    1433.5×
  76. 76Cheongsong gunGyeongsangbuk-do, South Korea
    1433.5×
  77. 77HigashimatsushimaMiyagi, Japan
    1423.5×
  78. 78NantanKyoto, Japan
    1413.5×
  79. 78AsakuchiOkayama, Japan
    1413.5×
  80. 80KainanWakayama, Japan
    1413.4×
  81. 81HimejiHyōgo, Japan
    1403.4×
  82. 82Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1403.4×
  83. 83DamyangJeollanam-do, South Korea
    1393.4×
  84. 84Mae SotTak, Thailand
    1383.4×
  85. 85TakarazukaHyōgo, Japan
    1383.4×
  86. 86GoseongGyeongsangnam-do, South Korea
    1383.4×
  87. 86ToyonakaOsaka, Japan
    1383.4×
  88. 88VillarricaAraucania, Chile
    1373.3×
  89. 89SōjaOkayama, Japan
    1363.3×
  90. 90MoriokaIwate, Japan
    1353.3×
  91. 90JōyōKyoto, Japan
    1353.3×
  92. 92KurashikiOkayama, Japan
    1343.3×
  93. 92GeojeGyeongsangnam-do, South Korea
    1343.3×
  94. 94HashimotoWakayama, Japan
    1343.3×
  95. 95AndongGyeongsangbuk-do, South Korea
    1323.2×
  96. 96KōtariKyoto, Japan
    1313.2×
  97. 97HigashinozoeHyōgo, Japan
    1313.2×
  98. 98KyotoKyoto, Japan
    1303.2×
  99. 99GangneungGangwon-do, South Korea
    1303.2×
  100. 100YeongjuGyeongsangbuk-do, South Korea
    1303.1×
  101. 101NabariMie, Japan
    1293.1×
  102. 101IkarugaHyōgo, Japan
    1293.1×
  103. 101TatsunoHyōgo, Japan
    1293.1×
  104. 104KinzanChungcheongnam-do, South Korea
    1283.1×
  105. 105DaeguDaegu, South Korea
    1283.1×
  106. 105OnoHyōgo, Japan
    1283.1×
  107. 107YokkaichiMie, Japan
    1283.1×
  108. 108UjiKyoto, Japan
    1273.1×
  109. 108FukushimaFukushima, Japan
    1273.1×
  110. 108San Luis PotosíSan Luis Potosí, Mexico
    1273.1×
  111. 111SaseboNagasaki, Japan
    1263.0×
  112. 112NakatsuOita, Japan
    1263.0×
  113. 113GobōWakayama, Japan
    1263.0×
  114. 114HanoiHanoi, Vietnam
    1243.0×
  115. 115WaegwanGyeongsangbuk-do, South Korea
    1243.0×
  116. 116SukhothaiSukhothai, Thailand
    1243.0×
  117. 117Amnat CharoenAmnat Charoen, Thailand
    1233.0×
  118. 118GumiGyeongsangbuk-do, South Korea
    1233.0×
  119. 119TakashimaShiga, Japan
    1222.9×
  120. 120CoyhaiqueAysén, Chile
    1222.9×
  121. 121KusatsuShiga, Japan
    1222.9×
  122. 121IkiNagasaki, Japan
    1222.9×
  123. 123HikariYamaguchi, Japan
    1212.9×
  124. 123KōriyamaFukushima, Japan
    1212.9×
  125. 123KizugawaKyoto, Japan
    1212.9×
  126. 126TsuyamaOkayama, Japan
    1202.9×
  127. 127YecheonGyeongsangbuk-do, South Korea
    1202.9×
  128. 128YasothonYasothon, Thailand
    1202.9×
  129. 128ŌtakeHiroshima, Japan
    1202.9×
  130. 130ChinjuGyeongsangnam-do, South Korea
    1192.9×
  131. 131SandachōHyōgo, Japan
    1192.9×
  132. 131KinokawaWakayama, Japan
    1192.9×
  133. 133MiharaHiroshima, Japan
    1192.9×
  134. 133HwawŏnDaegu, South Korea
    1192.9×
  135. 135ShibataNiigata, Japan
    1182.8×
  136. 136ImabariEhime, Japan
    1182.8×
  137. 137JumunjinGangwon-do, South Korea
    1172.8×
  138. 138Narutochō-mitsuishiTokushima, Japan
    1172.8×
  139. 139BizenOkayama, Japan
    1172.8×
  140. 140Sakon NakhonSakon Nakhon, Thailand
    1162.8×
  141. 140ChangsuJeollabuk-do, South Korea
    1162.8×
  142. 140SaijōEhime, Japan
    1162.8×
  143. 143MarugameKagawa, Japan
    1162.8×
  144. 143NacimientoBiobio, Chile
    1162.8×
  145. 145KasaokaOkayama, Japan
    1152.7×
  146. 146KaminokawaTochigi, Japan
    1152.7×
  147. 147YokoteAkita, Japan
    1142.7×
  148. 148SangjuGyeongsangbuk-do, South Korea
    1132.7×
  149. 148KameokaKyoto, Japan
    1132.7×
  150. 150YeojuGyeonggi-do, South Korea
    1132.7×
  151. 150KunwiGyeongsangbuk-do, South Korea
    1132.7×
  152. 152ZentsujichóKagawa, Japan
    1132.7×
  153. 152HakuiIshikawa, Japan
    1132.7×
  154. 154Roi EtRoi Et, Thailand
    1122.7×
  155. 154HashimaGifu, Japan
    1122.7×
  156. 156JangheungJeollanam-do, South Korea
    1122.7×
  157. 156AnanTokushima, Japan
    1122.7×
  158. 156WakuyaMiyagi, Japan
    1122.7×
  159. 159San CarlosÑuble, Chile
    1122.7×
  160. 160HiragiKagawa, Japan
    1122.7×
  161. 160ShikokuchūōEhime, Japan
    1122.7×
  162. 162GotōNagasaki, Japan
    1112.6×
  163. 163Jinan-gunJeollabuk-do, South Korea
    1112.6×
  164. 164Hongch’ŏnGangwon-do, South Korea
    1112.6×
  165. 164SagaSaga, Japan
    1112.6×
  166. 166BaghdadBaghdad, Iraq
    1112.6×
  167. 166Jeju CityJeju-do, South Korea
    1112.6×
  168. 166TakinomiyaKagawa, Japan
    1112.6×
  169. 166TakamatsuKagawa, Japan
    1112.6×
  170. 166KureHiroshima, Japan
    1112.6×
  171. 171NiihamaEhime, Japan
    1102.6×
  172. 171FukuchiyamaKyoto, Japan
    1102.6×
  173. 173NangenJeollabuk-do, South Korea
    1102.6×
  174. 173ŌtsuShiga, Japan
    1102.6×
  175. 175Puerto AysénAysén, Chile
    1092.6×
  176. 175La UniónLos Ríos Region, Chile
    1092.6×
  177. 175HadongGyeongsangnam-do, South Korea
    1092.6×
  178. 178ŌmutaFukuoka, Japan
    1092.6×
  179. 179PubalGyeonggi-do, South Korea
    1092.6×
  180. 180OkcheonNorth Chungcheong, South Korea
    1092.6×
  181. 181KudamatsuYamaguchi, Japan
    1082.6×
  182. 181Kan’onjichōKagawa, Japan
    1082.6×
  183. 183Kashihara-shiNara, Japan
    1082.6×
  184. 184PhetchabunPhetchabun, Thailand
    1082.6×
  185. 184CoronelBiobio, Chile
    1082.6×
  186. 186TokushimaTokushima, Japan
    1082.5×
  187. 186Abujalow-cost sensorsFCT, Nigeria
    1082.5×
  188. 188WŏnjuGangwon-do, South Korea
    1072.5×
  189. 188SeogwipoJeju-do, South Korea
    1072.5×
  190. 190Vientianelow-cost sensorsVientiane Prefecture, Laos
    1072.5×
  191. 190YeongdongNorth Chungcheong, South Korea
    1072.5×
  192. 190ŌgakiGifu, Japan
    1072.5×
  193. 190TakuSaga, Japan
    1072.5×
  194. 194ToyamaToyama, Japan
    1072.5×
  195. 194KashiwaraNara, Japan
    1072.5×
  196. 194HitachiIbaraki, Japan
    1072.5×
  197. 197Icheon-siGyeonggi-do, South Korea
    1062.5×
  198. 198MitoIbaraki, Japan
    1062.5×
  199. 198IwakiFukushima, Japan
    1062.5×
  200. 200GimcheonGyeongsangbuk-do, South Korea
    1062.5×

Top 200 of 2,397 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 18, 2024, smogrank.com/history/2024-04-18 (accessed 3 Oct 2026).

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