SmogRank / History / April 7, 2024

Most polluted cities on April 7, 2024

2,244 cities ranked by their average PM2.5 over the day; the worst was Piedras Negras, Mexico, at 986.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during April 7, 2024. All episodes.

← Piedras Negras 986.0 µg/m³ 900 µg/m³15 WHO 24-hour guideline
Every city ranked for April 7, 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. 1Piedras NegrasCoahuila, Mexico
    500+65.7×
  2. 2Mae SaiChiang Rai, Thailand
    25011.7×
  3. 3Chiang MaiChiang Mai, Thailand
    22810.2×
  4. 4Kathmandulow-cost sensorsBagmati Province, Nepal
    2199.6×
  5. 5Chiang RaiChiang Rai, Thailand
    1988.1×
  6. 6LamphunLamphun, Thailand
    1897.3×
  7. 7LampangLampang, Thailand
    1786.3×
  8. 8PhayaoPhayao, Thailand
    1786.2×
  9. 9NanNan, Thailand
    1776.1×
  10. 10UttaraditUttaradit, Thailand
    1745.9×
  11. 11Vientianelow-cost sensorsVientiane Prefecture, Laos
    1735.8×
  12. 12PhraePhrae, Thailand
    1705.5×
  13. 13DziałdowoWarmia-Masuria, Poland
    1685.3×
  14. 14Dhakalow-cost sensorsDhaka Division, Bangladesh
    1665.1×
  15. 15SukhothaiSukhothai, Thailand
    1645.0×
  16. 16LoeiLoei, Thailand
    1644.9×
  17. 17Ubon RatchathaniUbon Ratchathani, Thailand
    1624.7×
  18. 18Kamphaeng PhetKamphaeng Phet, Thailand
    1604.6×
  19. 19KalasinKalasin, Thailand
    1594.5×
  20. 20ShenyangLiaoning, China
    1584.3×
  21. 21MukdahanMukdahan, Thailand
    1574.3×
  22. 22PhichitPhichit, Thailand
    1574.2×
  23. 23Udon ThaniUdon Thani, Thailand
    1533.9×
  24. 24Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1533.9×
  25. 25PhetchabunPhetchabun, Thailand
    1523.8×
  26. 26Amnat CharoenAmnat Charoen, Thailand
    1523.8×
  27. 27BailénAndalusia, Spain
    1473.6×
  28. 28JaénAndalusia, Spain
    1473.6×
  29. 29Sakon NakhonSakon Nakhon, Thailand
    1463.6×
  30. 30Nong Bua LamphuNong Bua Lamphu, Thailand
    1463.6×
  31. 31CuencaCastille-La Mancha, Spain
    1453.6×
  32. 32KolkataWest Bengal, India
    1443.5×
  33. 33Roi EtRoi Et, Thailand
    1403.4×
  34. 34HyderabadTelangana, India
    1403.4×
  35. 35Nakhon SawanNakhon Sawan, Thailand
    1383.4×
  36. 36Chai NatChai Nat, Thailand
    1373.3×
  37. 37Forest ParkGeorgia, United States
    1343.3×
  38. 38KanchanaburiKanchanaburi, Thailand
    1343.3×
  39. 39YasothonYasothon, Thailand
    1333.2×
  40. 40PubalGyeonggi-do, South Korea
    1323.2×
  41. 41YeojuGyeonggi-do, South Korea
    1303.1×
  42. 42Khon KaenKhon Kaen, Thailand
    1263.1×
  43. 43YesanChungcheongnam-do, South Korea
    1253.0×
  44. 44JungpyongNorth Chungcheong, South Korea
    1253.0×
  45. 45Sing BuriSing Buri, Thailand
    1243.0×
  46. 46NacimientoBiobio, Chile
    1233.0×
  47. 47Karachilow-cost sensorsSindh, Pakistan
    1182.8×
  48. 48Mae SotTak, Thailand
    1172.8×
  49. 49AsanChungcheongnam-do, South Korea
    1172.8×
  50. 50HwadoGyeonggi-do, South Korea
    1162.8×
  51. 51HongseongChungcheongnam-do, South Korea
    1152.7×
  52. 51CholulaPuebla, Mexico
    1152.7×
  53. 53Icheon-siGyeonggi-do, South Korea
    1152.7×
  54. 54SeonghwanChungcheongnam-do, South Korea
    1132.7×
  55. 55PyeongtaekGyeonggi-do, South Korea
    1132.7×
  56. 56GunsanJeollabuk-do, South Korea
    1122.7×
  57. 57AnseongGyeonggi-do, South Korea
    1122.7×
  58. 58ChaiyaphumChaiyaphum, Thailand
    1122.7×
  59. 59WabuGyeonggi-do, South Korea
    1112.6×
  60. 60SejongSejong-si, South Korea
    1102.6×
  61. 61Yangp'yŏngGyeonggi-do, South Korea
    1102.6×
  62. 61LorcaMurcia, Spain
    1102.6×
  63. 63IncheonIncheon, South Korea
    1082.6×
  64. 64WŏnjuGangwon-do, South Korea
    1082.5×
  65. 65Chinch'ŏnNorth Chungcheong, South Korea
    1072.5×
  66. 66AshgabatAshgabat, Turkmenistan
    1072.5×
  67. 66Si Sa KetSi Sa Ket, Thailand
    1072.5×
  68. 66Cheongju-siNorth Chungcheong, South Korea
    1072.5×
  69. 69GongjuChungcheongnam-do, South Korea
    1072.5×
  70. 70Nakhon RatchasimaNakhon Ratchasima, Thailand
    1062.5×
  71. 71La Línea de la ConcepciónAndalusia, Spain
    1062.5×
  72. 72HanoiHanoi, Vietnam
    1052.5×
  73. 73Hwaseong-siGyeonggi-do, South Korea
    1042.4×
  74. 73ChungjuNorth Chungcheong, South Korea
    1042.4×
  75. 75Gimpo-siGyeonggi-do, South Korea
    1032.4×
  76. 76GwangjuGyeonggi-do, South Korea
    1022.4×
  77. 77CelayaGuanajuato, Mexico
    1022.4×
  78. 78KoesanNorth Chungcheong, South Korea
    1012.4×
  79. 79GapyeongGyeonggi-do, South Korea
    1002.4×
  80. 80Ganghwa-gunIncheon, South Korea
    1002.4×
  81. 81YeongjuGyeongsangbuk-do, South Korea
    992.3×
  82. 82CheonanChungcheongnam-do, South Korea
    992.3×
  83. 83YangjuGyeonggi-do, South Korea
    992.3×
  84. 84Kuala LumpurKuala Lumpur, Malaysia
    992.3×
  85. 84Ansan-siGyeonggi-do, South Korea
    992.3×
  86. 86Guri-siGyeonggi-do, South Korea
    982.3×
  87. 87IksanJeollabuk-do, South Korea
    982.3×
  88. 87Hongch’ŏnGangwon-do, South Korea
    982.3×
  89. 89TangjinChungcheongnam-do, South Korea
    982.3×
  90. 90TemucoAraucania, Chile
    982.3×
  91. 91RabinalBaja Verapaz, Guatemala
    972.3×
  92. 91HualquiBiobio, Chile
    972.3×
  93. 93KigaliKigali, Rwanda
    972.2×
  94. 93UlsanUlsan, South Korea
    972.2×
  95. 95Bucheon-siGyeonggi-do, South Korea
    962.2×
  96. 95Goyang-siGyeonggi-do, South Korea
    962.2×
  97. 97Suphan BuriSuphan Buri, Thailand
    962.2×
  98. 98BuanJeollabuk-do, South Korea
    962.2×
  99. 99DaejeonDaejeon, South Korea
    962.2×
  100. 99OsanGyeonggi-do, South Korea
    962.2×
  101. 101SeoulSeoul, South Korea
    962.2×
  102. 101NonsanChungcheongnam-do, South Korea
    962.2×
  103. 103KimjeJeollabuk-do, South Korea
    952.2×
  104. 104HanamGyeonggi-do, South Korea
    952.2×
  105. 104MelillaMelilla, Spain
    952.2×
  106. 106Islamabadlow-cost sensorsIslamabad, Pakistan
    952.2×
  107. 107MurciaMurcia, Spain
    942.1×
  108. 107AlbaceteCastille-La Mancha, Spain
    942.1×
  109. 109PuertollanoCastille-La Mancha, Spain
    942.1×
  110. 110SatunSatun, Thailand
    932.1×
  111. 111SuwonGyeonggi-do, South Korea
    932.1×
  112. 112AlmeríaAndalusia, Spain
    922.1×
  113. 113BoryeongChungcheongnam-do, South Korea
    922.1×
  114. 113MunsanGyeonggi-do, South Korea
    922.1×
  115. 115BaghdadBaghdad, Iraq
    922.1×
  116. 115HwacheonGangwon-do, South Korea
    922.1×
  117. 117BusanBusan, South Korea
    922.1×
  118. 118PohangGyeongsangbuk-do, South Korea
    912.0×
  119. 119Şabāḩ as SālimMubārak al Kabīr, Kuwait
    902.0×
  120. 119YŏnmuChungcheongnam-do, South Korea
    902.0×
  121. 121CheorwonGangwon-do, South Korea
    902.0×
  122. 122NamsaJeollabuk-do, South Korea
    902.0×
  123. 122GwangmyeongGyeonggi-do, South Korea
    902.0×
  124. 124San RoqueAndalusia, Spain
    892.0×
  125. 124TocopillaAntofagasta, Chile
    892.0×
  126. 124LawrencevilleGeorgia, United States
    892.0×
  127. 127NamyangjuGyeonggi-do, South Korea
    892.0×
  128. 128RanongRanong province, Thailand
    881.9×
  129. 128CeutaCeuta, Spain
    881.9×
  130. 130KasaokaOkayama, Japan
    881.9×
  131. 131AsakuchiOkayama, Japan
    881.9×
  132. 132SurinSurin, Thailand
    881.9×
  133. 133Si Maha PhotPrachin Buri, Thailand
    881.9×
  134. 133YeonilGyeongsangbuk-do, South Korea
    881.9×
  135. 133AlgecirasAndalusia, Spain
    881.9×
  136. 136GijangBusan, South Korea
    881.9×
  137. 137ChuncheonGangwon-do, South Korea
    871.9×
  138. 137MóstolesMadrid, Spain
    871.9×
  139. 137Puente AltoSantiago Metropolitan, Chile
    871.9×
  140. 140SarajevoFederation of B&H, Bosnia and Herzegovina
    871.9×
  141. 141SangjuGyeongsangbuk-do, South Korea
    871.9×
  142. 141OkcheonNorth Chungcheong, South Korea
    871.9×
  143. 141TongyeongGyeongsangnam-do, South Korea
    871.9×
  144. 141GranadaAndalusia, Spain
    871.9×
  145. 145RatchaburiRatchaburi, Thailand
    861.9×
  146. 146ChinjuGyeongsangnam-do, South Korea
    861.9×
  147. 147SaijōEhime, Japan
    861.9×
  148. 147Ciudad RealCastille-La Mancha, Spain
    861.9×
  149. 149MungyeongGyeongsangbuk-do, South Korea
    861.9×
  150. 150WanjuJeollabuk-do, South Korea
    861.8×
  151. 150Molina de SeguraMurcia, Spain
    861.8×
  152. 152Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    851.8×
  153. 152ImsilJeollabuk-do, South Korea
    851.8×
  154. 152AndongGyeongsangbuk-do, South Korea
    851.8×
  155. 155YecheonGyeongsangbuk-do, South Korea
    851.8×
  156. 155MokpoJeollanam-do, South Korea
    851.8×
  157. 155JeonjuJeollabuk-do, South Korea
    851.8×
  158. 155FukuyamaHiroshima, Japan
    851.8×
  159. 159PhuketPhuket, Thailand
    851.8×
  160. 160JeongeupJeollabuk-do, South Korea
    851.8×
  161. 161Alcalá de HenaresMadrid, Spain
    851.8×
  162. 161AtlantaGeorgia, United States
    851.8×
  163. 163CuranilahueBiobio, Chile
    851.8×
  164. 164ShanghaiShanghai, China
    841.8×
  165. 164Uijeongbu-siGyeonggi-do, South Korea
    841.8×
  166. 164KinzanChungcheongnam-do, South Korea
    841.8×
  167. 167KimhaeGyeongsangnam-do, South Korea
    841.8×
  168. 167Khlong Sam WaBangkok, Thailand
    841.8×
  169. 169Bang NaBangkok, Thailand
    841.8×
  170. 169BeijingBeijing, China
    841.8×
  171. 169Ciudad JuárezChihuahua, Mexico
    841.8×
  172. 172EisenGyeongsangbuk-do, South Korea
    841.8×
  173. 173SuncheonJeollanam-do, South Korea
    841.8×
  174. 173CuricóMaule Region, Chile
    841.8×
  175. 173ShikokuchūōEhime, Japan
    841.8×
  176. 176Jeju CityJeju-do, South Korea
    831.8×
  177. 176Santa Anita - Los FicusLima region, Peru
    831.8×
  178. 178AntananarivoAnalamanga, Madagascar
    831.8×
  179. 178SaraburiSaraburi, Thailand
    831.8×
  180. 180SantiagoSantiago Metropolitan, Chile
    831.8×
  181. 181SokchoGangwon-do, South Korea
    831.7×
  182. 181Seongnam-siGyeonggi-do, South Korea
    831.7×
  183. 181Azuqueca de HenaresCastille-La Mancha, Spain
    831.7×
  184. 181Candler-McAfeeGeorgia, United States
    831.7×
  185. 185HaenamJeollanam-do, South Korea
    831.7×
  186. 186MumbaiMaharashtra, India
    821.7×
  187. 186DamyangJeollanam-do, South Korea
    821.7×
  188. 186QuinteroValparaiso, Chile
    821.7×
  189. 186KennesawGeorgia, United States
    821.7×
  190. 190HayangGyeongsangbuk-do, South Korea
    821.7×
  191. 190Donghae CityGangwon-do, South Korea
    821.7×
  192. 192YangguGangwon-do, South Korea
    821.7×
  193. 193Buri RamBuriram, Thailand
    811.7×
  194. 193Anyang-siGyeonggi-do, South Korea
    811.7×
  195. 193CoronelBiobio, Chile
    811.7×
  196. 196Abujalow-cost sensorsFCT, Nigeria
    811.7×
  197. 196AlgeteMadrid, Spain
    811.7×
  198. 196TalaganteSantiago Metropolitan, Chile
    811.7×
  199. 196SinanJeollanam-do, South Korea
    811.7×
  200. 200ZhushanTaiwan, Taiwan
    811.7×

Top 200 of 2,244 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 7, 2024, smogrank.com/history/2024-04-07 (accessed 3 Oct 2026).

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