SmogRank / History / April 6, 2024

Most polluted cities on April 6, 2024

2,226 cities ranked by their average PM2.5 over the day; the worst was Mae Sai, Thailand, at 214.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during April 6, 2024. All episodes.

← Mae Sai 214.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for April 6, 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. 1Mae SaiChiang Rai, Thailand
    28914.3×
  2. 2Chiang MaiChiang Mai, Thailand
    2159.3×
  3. 3LampangLampang, Thailand
    1957.9×
  4. 3Chiang RaiChiang Rai, Thailand
    1957.9×
  5. 5LamphunLamphun, Thailand
    1897.3×
  6. 6PhayaoPhayao, Thailand
    1846.8×
  7. 7NanNan, Thailand
    1796.4×
  8. 8Kathmandulow-cost sensorsBagmati Province, Nepal
    1796.4×
  9. 9Vientianelow-cost sensorsVientiane Prefecture, Laos
    1766.1×
  10. 10Ciudad JuárezChihuahua, Mexico
    1705.5×
  11. 11PhraePhrae, Thailand
    1705.5×
  12. 12AstanaAstana, Kazakhstan
    1695.4×
  13. 13KalasinKalasin, Thailand
    1685.4×
  14. 14BeijingBeijing, China
    1675.2×
  15. 15Udon ThaniUdon Thani, Thailand
    1665.2×
  16. 16LoeiLoei, Thailand
    1665.1×
  17. 17Dhakalow-cost sensorsDhaka Division, Bangladesh
    1655.0×
  18. 18UttaraditUttaradit, Thailand
    1634.9×
  19. 19SukhothaiSukhothai, Thailand
    1634.8×
  20. 20MukdahanMukdahan, Thailand
    1634.8×
  21. 21Kamphaeng PhetKamphaeng Phet, Thailand
    1624.8×
  22. 22PhichitPhichit, Thailand
    1604.6×
  23. 23DziałdowoWarmia-Masuria, Poland
    1594.5×
  24. 24Nong Bua LamphuNong Bua Lamphu, Thailand
    1594.4×
  25. 25ShenyangLiaoning, China
    1574.3×
  26. 26KolkataWest Bengal, India
    1564.2×
  27. 27Ubon RatchathaniUbon Ratchathani, Thailand
    1564.2×
  28. 28KanchanaburiKanchanaburi, Thailand
    1554.1×
  29. 28PhetchabunPhetchabun, Thailand
    1554.1×
  30. 30Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1554.1×
  31. 31Nakhon SawanNakhon Sawan, Thailand
    1544.0×
  32. 32HyderabadTelangana, India
    1544.0×
  33. 33Roi EtRoi Et, Thailand
    1533.9×
  34. 34Chai NatChai Nat, Thailand
    1533.9×
  35. 35ChaiyaphumChaiyaphum, Thailand
    1523.8×
  36. 36Sakon NakhonSakon Nakhon, Thailand
    1523.8×
  37. 37Khon KaenKhon Kaen, Thailand
    1523.8×
  38. 38Amnat CharoenAmnat Charoen, Thailand
    1513.7×
  39. 39SeonghwanChungcheongnam-do, South Korea
    1503.7×
  40. 40YasothonYasothon, Thailand
    1453.6×
  41. 41Lop BuriLopburi, Thailand
    1443.5×
  42. 42Sing BuriSing Buri, Thailand
    1323.2×
  43. 43PubalGyeonggi-do, South Korea
    1293.1×
  44. 44Mae SotTak, Thailand
    1283.1×
  45. 45TangjinChungcheongnam-do, South Korea
    1273.1×
  46. 46PyeongtaekGyeonggi-do, South Korea
    1233.0×
  47. 47AnseongGyeonggi-do, South Korea
    1222.9×
  48. 48Hwaseong-siGyeonggi-do, South Korea
    1202.9×
  49. 49Bucheon-siGyeonggi-do, South Korea
    1192.9×
  50. 50DerbyKansas, United States
    1192.8×
  51. 51PuertollanoCastille-La Mancha, Spain
    1182.8×
  52. 52Nakhon RatchasimaNakhon Ratchasima, Thailand
    1182.8×
  53. 53YeojuGyeonggi-do, South Korea
    1182.8×
  54. 53Ansan-siGyeonggi-do, South Korea
    1182.8×
  55. 55GwangmyeongGyeonggi-do, South Korea
    1172.8×
  56. 56YesanChungcheongnam-do, South Korea
    1152.8×
  57. 57Goyang-siGyeonggi-do, South Korea
    1152.7×
  58. 58WabuGyeonggi-do, South Korea
    1142.7×
  59. 59OsanGyeonggi-do, South Korea
    1142.7×
  60. 59IncheonIncheon, South Korea
    1142.7×
  61. 61HwadoGyeonggi-do, South Korea
    1132.7×
  62. 62JungpyongNorth Chungcheong, South Korea
    1122.7×
  63. 63SeoulSeoul, South Korea
    1112.6×
  64. 64Icheon-siGyeonggi-do, South Korea
    1102.6×
  65. 64JaénAndalusia, Spain
    1102.6×
  66. 66AsanChungcheongnam-do, South Korea
    1092.6×
  67. 67Gimpo-siGyeonggi-do, South Korea
    1082.6×
  68. 67BailénAndalusia, Spain
    1082.6×
  69. 69Hua HinPrachuap Khiri Khan, Thailand
    1072.5×
  70. 69Guri-siGyeonggi-do, South Korea
    1072.5×
  71. 71CheonanChungcheongnam-do, South Korea
    1062.5×
  72. 71CuencaCastille-La Mancha, Spain
    1062.5×
  73. 73KigaliKigali, Rwanda
    1052.5×
  74. 73HanamGyeonggi-do, South Korea
    1052.5×
  75. 75HongseongChungcheongnam-do, South Korea
    1032.4×
  76. 76JeddahMecca Region, Saudi Arabia
    1032.4×
  77. 77SuwonGyeonggi-do, South Korea
    1022.4×
  78. 78HanoiHanoi, Vietnam
    1012.4×
  79. 78Suphan BuriSuphan Buri, Thailand
    1012.4×
  80. 80Chinch'ŏnNorth Chungcheong, South Korea
    1012.4×
  81. 80CelayaGuanajuato, Mexico
    1012.4×
  82. 82Si Maha PhotPrachin Buri, Thailand
    992.3×
  83. 83GunsanJeollabuk-do, South Korea
    992.3×
  84. 84MunsanGyeonggi-do, South Korea
    992.3×
  85. 84Anyang-siGyeonggi-do, South Korea
    992.3×
  86. 86MumbaiMaharashtra, India
    982.3×
  87. 86SaraburiSaraburi, Thailand
    982.3×
  88. 88IksanJeollabuk-do, South Korea
    982.3×
  89. 88Santa Anita - Los FicusLima region, Peru
    982.3×
  90. 90SeosanChungcheongnam-do, South Korea
    982.3×
  91. 91RatchaburiRatchaburi, Thailand
    972.3×
  92. 91Ganghwa-gunIncheon, South Korea
    972.3×
  93. 93Karachilow-cost sensorsSindh, Pakistan
    972.3×
  94. 93Bang NaBangkok, Thailand
    972.3×
  95. 95Yangp'yŏngGyeonggi-do, South Korea
    972.2×
  96. 96WŏnjuGangwon-do, South Korea
    962.2×
  97. 97SatunSatun, Thailand
    962.2×
  98. 98Si Sa KetSi Sa Ket, Thailand
    962.2×
  99. 98Taesal-liChungcheongnam-do, South Korea
    962.2×
  100. 98NamyangjuGyeonggi-do, South Korea
    962.2×
  101. 101Islamabadlow-cost sensorsIslamabad, Pakistan
    952.2×
  102. 101GwangjuGyeonggi-do, South Korea
    952.2×
  103. 103BaghdadBaghdad, Iraq
    952.2×
  104. 104SejongSejong-si, South Korea
    952.2×
  105. 105TocopillaAntofagasta, Chile
    952.2×
  106. 106Uijeongbu-siGyeonggi-do, South Korea
    952.2×
  107. 107Buri RamBuriram, Thailand
    942.2×
  108. 108BoryeongChungcheongnam-do, South Korea
    942.1×
  109. 108KimjeJeollabuk-do, South Korea
    942.1×
  110. 110BuanJeollabuk-do, South Korea
    942.1×
  111. 110Ciudad RealCastille-La Mancha, Spain
    942.1×
  112. 112MonterreyNuevo León, Mexico
    932.1×
  113. 113SurinSurin, Thailand
    932.1×
  114. 114GapyeongGyeonggi-do, South Korea
    932.1×
  115. 114Puerto VarasLos Lagos Region, Chile
    932.1×
  116. 116ZhushanTaiwan, Taiwan
    932.1×
  117. 116Khlong Sam WaBangkok, Thailand
    932.1×
  118. 118YangjuGyeonggi-do, South Korea
    922.1×
  119. 118Seongnam-siGyeonggi-do, South Korea
    922.1×
  120. 120Khlong LuangPathum Thani, Thailand
    922.1×
  121. 121Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    922.1×
  122. 121NonsanChungcheongnam-do, South Korea
    922.1×
  123. 123NamsaJeollabuk-do, South Korea
    922.1×
  124. 124WichitaKansas, United States
    902.0×
  125. 125Prachin BuriPrachin Buri, Thailand
    902.0×
  126. 125Cheongju-siNorth Chungcheong, South Korea
    902.0×
  127. 125NacimientoBiobio, Chile
    902.0×
  128. 125SalamancaGuanajuato, Mexico
    902.0×
  129. 129RanongRanong province, Thailand
    902.0×
  130. 130HualquiBiobio, Chile
    892.0×
  131. 131Kuala LumpurKuala Lumpur, Malaysia
    892.0×
  132. 131KoesanNorth Chungcheong, South Korea
    892.0×
  133. 131YŏnmuChungcheongnam-do, South Korea
    892.0×
  134. 134ChungjuNorth Chungcheong, South Korea
    892.0×
  135. 135SocorroTexas, United States
    881.9×
  136. 136PhetchaburiPhetchaburi, Thailand
    881.9×
  137. 137Ciudad Benito JuárezNuevo León, Mexico
    881.9×
  138. 138Ban Samae DamBangkok, Thailand
    871.9×
  139. 139Nong ChokBangkok, Thailand
    871.9×
  140. 140Nakhon NayokNakhon Nayok, Thailand
    871.9×
  141. 141Villa Poeta José Gálvez BarrenecheaLima region, Peru
    871.9×
  142. 142Puerto MonttLos Lagos Region, Chile
    861.9×
  143. 143ShanghaiShanghai, China
    861.9×
  144. 144CairoCairo, Egypt
    851.8×
  145. 145Nong KhaemBangkok, Thailand
    851.8×
  146. 145Chiayi CityTaiwan, Taiwan
    851.8×
  147. 147Khan Na YaoBangkok, Thailand
    851.8×
  148. 148BangkokBangkok, Thailand
    851.8×
  149. 148Hongch’ŏnGangwon-do, South Korea
    851.8×
  150. 148MelillaMelilla, Spain
    851.8×
  151. 151PhuketPhuket, Thailand
    851.8×
  152. 152SarajevoFederation of B&H, Bosnia and Herzegovina
    841.8×
  153. 153EisenGyeongsangbuk-do, South Korea
    841.8×
  154. 154Lat KrabangBangkok, Thailand
    841.8×
  155. 155Nakhon PathomNakhon Pathom, Thailand
    841.8×
  156. 156FukuyamaHiroshima, Japan
    841.8×
  157. 156HuelvaAndalusia, Spain
    841.8×
  158. 158Phra PradaengSamut Prakan, Thailand
    831.8×
  159. 159Şabāḩ as SālimMubārak al Kabīr, Kuwait
    831.8×
  160. 159YongkangTaiwan, Taiwan
    831.8×
  161. 159HadongGyeongsangnam-do, South Korea
    831.8×
  162. 162DouliuTaiwan, Taiwan
    831.8×
  163. 162TaharaAichi, Japan
    831.8×
  164. 164KasaokaOkayama, Japan
    831.7×
  165. 164Sai MaiBangkok, Thailand
    831.7×
  166. 166GongjuChungcheongnam-do, South Korea
    821.7×
  167. 166CheorwonGangwon-do, South Korea
    821.7×
  168. 168YeongjuGyeongsangbuk-do, South Korea
    821.7×
  169. 169ChuncheonGangwon-do, South Korea
    821.7×
  170. 170JeongeupJeollabuk-do, South Korea
    821.7×
  171. 171Mueang NonthaburiNonthaburi, Thailand
    821.7×
  172. 171WanjuJeollabuk-do, South Korea
    821.7×
  173. 173YeosuJeollanam-do, South Korea
    821.7×
  174. 174CuricóMaule Region, Chile
    811.7×
  175. 175SaijōEhime, Japan
    811.7×
  176. 176JeonjuJeollabuk-do, South Korea
    811.7×
  177. 177Puente AltoSantiago Metropolitan, Chile
    811.7×
  178. 178MokpoJeollanam-do, South Korea
    811.7×
  179. 179Hat YaiSongkhla, Thailand
    801.7×
  180. 179Bang Bo DistrictSamut Prakan, Thailand
    801.7×
  181. 179SangjuGyeongsangbuk-do, South Korea
    801.7×
  182. 182AshgabatAshgabat, Turkmenistan
    801.6×
  183. 182Bang KapiBangkok, Thailand
    801.6×
  184. 182RabinalBaja Verapaz, Guatemala
    801.6×
  185. 185NiihamaEhime, Japan
    801.6×
  186. 185GwangyangJeollanam-do, South Korea
    801.6×
  187. 185GeojeGyeongsangnam-do, South Korea
    801.6×
  188. 188SinanJeollanam-do, South Korea
    801.6×
  189. 189Ban Talat BuengChon Buri, Thailand
    791.6×
  190. 189HwacheonGangwon-do, South Korea
    791.6×
  191. 191YangonYangon, Myanmar
    791.6×
  192. 191UlsanUlsan, South Korea
    791.6×
  193. 193Surat ThaniSurat Thani, Thailand
    791.6×
  194. 193ValdemoroMadrid, Spain
    791.6×
  195. 193ShikokuchūōEhime, Japan
    791.6×
  196. 196ChinjuGyeongsangnam-do, South Korea
    791.6×
  197. 197BuyeoChungcheongnam-do, South Korea
    781.6×
  198. 197GranadaAndalusia, Spain
    781.6×
  199. 197IrapuatoGuanajuato, Mexico
    781.6×
  200. 200Wan ChaiWan Chai, Hong Kong
    781.6×

Top 200 of 2,226 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 6, 2024, smogrank.com/history/2024-04-06 (accessed 3 Oct 2026).

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