SmogRank / History / April 8, 2023

Most polluted cities on April 8, 2023

1,456 cities ranked by their average PM2.5 over the day; the worst was Mae Sai, Thailand, at 326.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during April 8, 2023. All episodes.

← Mae Sai 326.0 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every city ranked for April 8, 2023, 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
    500+21.7×
  2. 2Ban HouakhouaBokeo, Laos
    48321.1×
  3. 3Chiang RaiChiang Rai, Thailand
    30415.1×
  4. 4LoeiLoei, Thailand
    28714.1×
  5. 5Chiang MaiChiang Mai, Thailand
    26312.5×
  6. 6PhayaoPhayao, Thailand
    26112.4×
  7. 7Dhakalow-cost sensorsDhaka Division, Bangladesh
    23810.9×
  8. 8NanNan, Thailand
    23610.7×
  9. 9LampangLampang, Thailand
    2229.8×
  10. 10LamphunLamphun, Thailand
    2109.0×
  11. 11N'DjamenaN’Djaména, Chad
    1978.1×
  12. 12PhraePhrae, Thailand
    1826.7×
  13. 13OsornoLos Lagos Region, Chile
    1786.3×
  14. 14UttaraditUttaradit, Thailand
    1776.2×
  15. 15SukhothaiSukhothai, Thailand
    1756.0×
  16. 16Nong Bua LamphuNong Bua Lamphu, Thailand
    1735.8×
  17. 17Kathmandulow-cost sensorsBagmati Province, Nepal
    1735.8×
  18. 18Lahorelow-cost sensorsPunjab, Pakistan
    1735.8×
  19. 19Udon ThaniUdon Thani, Thailand
    1705.5×
  20. 20Kamphaeng PhetKamphaeng Phet, Thailand
    1675.3×
  21. 21ValjevoCentral Serbia, Serbia
    1634.8×
  22. 22Chai NatChai Nat, Thailand
    1594.5×
  23. 23Sing BuriSing Buri, Thailand
    1594.4×
  24. 24AlexandriaAlexandria, Egypt
    1594.4×
  25. 25TakTak, Thailand
    1584.4×
  26. 26DelhiDelhi, India
    1584.4×
  27. 27PhichitPhichit, Thailand
    1564.2×
  28. 28LazarevacCentral Serbia, Serbia
    1564.1×
  29. 29SmederevoCentral Serbia, Serbia
    1554.1×
  30. 30Ubon RatchathaniUbon Ratchathani, Thailand
    1533.9×
  31. 31PhetchabunPhetchabun, Thailand
    1523.8×
  32. 32MumbaiMaharashtra, India
    1523.8×
  33. 33Novi PazarCentral Serbia, Serbia
    1513.7×
  34. 33PakxanBolikhamsai, Laos
    1513.7×
  35. 35Mae SotTak, Thailand
    1513.7×
  36. 36Puerto AysénAysén, Chile
    1503.7×
  37. 37Lop BuriLopburi, Thailand
    1473.6×
  38. 38KalasinKalasin, Thailand
    1463.6×
  39. 39Khon KaenKhon Kaen, Thailand
    1453.6×
  40. 40PančevoVojvodina, Serbia
    1443.5×
  41. 41ZemunCentral Serbia, Serbia
    1423.5×
  42. 42ObrenovacCentral Serbia, Serbia
    1413.5×
  43. 43Nakhon SawanNakhon Sawan, Thailand
    1393.4×
  44. 44HanoiHanoi, Vietnam
    1393.4×
  45. 45PirotCentral Serbia, Serbia
    1383.4×
  46. 45CoyhaiqueAysén, Chile
    1383.4×
  47. 47Tha BoNong Khai, Thailand
    1373.4×
  48. 48La UniónLos Ríos Region, Chile
    1363.3×
  49. 49Roi EtRoi Et, Thailand
    1323.2×
  50. 50JakartaJakarta, Indonesia
    1323.2×
  51. 51MukdahanMukdahan, Thailand
    1323.2×
  52. 52ČačakCentral Serbia, Serbia
    1293.1×
  53. 53BamakoBamako, Mali
    1283.1×
  54. 54BelgradeCentral Serbia, Serbia
    1263.1×
  55. 55ChaiyaphumChaiyaphum, Thailand
    1233.0×
  56. 56IaşiIași County, Romania
    1233.0×
  57. 57Puerto VarasLos Lagos Region, Chile
    1222.9×
  58. 58Suphan BuriSuphan Buri, Thailand
    1222.9×
  59. 59YangonYangon, Myanmar
    1202.9×
  60. 60Novi SadVojvodina, Serbia
    1202.9×
  61. 61KragujevacCentral Serbia, Serbia
    1192.9×
  62. 62CoronelBiobio, Chile
    1182.8×
  63. 63Bang Khun ThianBangkok, Thailand
    1162.8×
  64. 64Si Sa KetSi Sa Ket, Thailand
    1162.8×
  65. 65PristinaPristina, Kosovo
    1152.8×
  66. 66KanchanaburiKanchanaburi, Thailand
    1142.7×
  67. 67TlaquepaqueJalisco, Mexico
    1122.7×
  68. 68NišCentral Serbia, Serbia
    1092.6×
  69. 69KhartoumKhartoum, Sudan
    1082.6×
  70. 70GuangzhouGuangdong, China
    1062.5×
  71. 71SremčicaCentral Serbia, Serbia
    1062.5×
  72. 72CuranilahueBiobio, Chile
    1052.5×
  73. 73Ga-RankuwaNorth West, South Africa
    1042.5×
  74. 73NacimientoBiobio, Chile
    1042.5×
  75. 75BaghdadBaghdad, Iraq
    1042.4×
  76. 75Islamabadlow-cost sensorsIslamabad, Pakistan
    1042.4×
  77. 77HualquiBiobio, Chile
    1032.4×
  78. 78HyderabadTelangana, India
    1032.4×
  79. 78GuadalajaraJalisco, Mexico
    1032.4×
  80. 80Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    1022.4×
  81. 81RatchaburiRatchaburi, Thailand
    1012.4×
  82. 82JeddahMecca Region, Saudi Arabia
    1002.4×
  83. 83FutogVojvodina, Serbia
    992.3×
  84. 84Tepeji del Río de OcampoHidalgo, Mexico
    992.3×
  85. 85Nakhon RatchasimaNakhon Ratchasima, Thailand
    992.3×
  86. 86Sakon NakhonSakon Nakhon, Thailand
    982.3×
  87. 87Bang NaBangkok, Thailand
    972.3×
  88. 88Nong ChokBangkok, Thailand
    962.2×
  89. 89HualpénBiobio, Chile
    962.2×
  90. 90ValdiviaLos Ríos Region, Chile
    962.2×
  91. 91CelayaGuanajuato, Mexico
    952.2×
  92. 92Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    952.2×
  93. 93MexicaliBaja California, Mexico
    942.2×
  94. 94BorCentral Serbia, Serbia
    942.1×
  95. 94TemucoAraucania, Chile
    942.1×
  96. 96Karachilow-cost sensorsSindh, Pakistan
    932.1×
  97. 97ToméBiobio, Chile
    932.1×
  98. 98Khlong Sam WaBangkok, Thailand
    922.1×
  99. 99Hua HinPrachuap Khiri Khan, Thailand
    922.1×
  100. 100TalcahuanoBiobio, Chile
    922.1×
  101. 101QuillotaValparaiso, Chile
    902.0×
  102. 102BelmopanCayo District, Belize
    902.0×
  103. 103ConakryConakry, Guinea
    892.0×
  104. 104XonacatlánMéxico, Mexico
    892.0×
  105. 105LotaBiobio, Chile
    881.9×
  106. 106San Mateo AtencoMéxico, Mexico
    881.9×
  107. 107TalaganteSantiago Metropolitan, Chile
    881.9×
  108. 108SaraburiSaraburi, Thailand
    881.9×
  109. 109Ponca CityOklahoma, United States
    871.9×
  110. 110Khan Na YaoBangkok, Thailand
    871.9×
  111. 111Botevgradlow-cost sensorsSofia, Bulgaria
    871.9×
  112. 111Banja LukaSrpska, Bosnia and Herzegovina
    871.9×
  113. 113TolucaMéxico, Mexico
    861.9×
  114. 114Naucalpan de JuárezMéxico, Mexico
    861.9×
  115. 115Viña del MarValparaiso, Chile
    861.9×
  116. 116QuinteroValparaiso, Chile
    851.8×
  117. 117LinaresMaule Region, Chile
    851.8×
  118. 118UžiceCentral Serbia, Serbia
    851.8×
  119. 119ChiguayanteBiobio, Chile
    851.8×
  120. 119Saphan SungBangkok, Thailand
    851.8×
  121. 121Wan ChaiWan Chai, Hong Kong
    841.8×
  122. 122SantiagoSantiago Metropolitan, Chile
    841.8×
  123. 123Mong KokYau Tsim Mong District, Hong Kong
    841.8×
  124. 124Buri RamBuriram, Thailand
    841.8×
  125. 124WolfsbergCarinthia, Austria
    841.8×
  126. 126ChillánÑuble, Chile
    821.7×
  127. 127San Francisco TlalcilalcalpanMéxico, Mexico
    821.7×
  128. 128San Pedro de la PazBiobio, Chile
    821.7×
  129. 129ZapopanJalisco, Mexico
    821.7×
  130. 129Bueng KumBangkok, Thailand
    821.7×
  131. 131SalorTashkent Region, Uzbekistan
    821.7×
  132. 131San CarlosÑuble, Chile
    821.7×
  133. 133CuricóMaule Region, Chile
    811.7×
  134. 134Ciudad NezahualcoyotlMéxico, Mexico
    811.7×
  135. 135LublinLublin, Poland
    811.7×
  136. 136JohannesburgGauteng, South Africa
    811.7×
  137. 137Si Maha PhotPrachin Buri, Thailand
    801.7×
  138. 138Lat KrabangBangkok, Thailand
    801.7×
  139. 139ThembisaGauteng, South Africa
    801.6×
  140. 140Abujalow-cost sensorsFCT, Nigeria
    791.6×
  141. 141BucharestBucharest, Romania
    791.6×
  142. 142ConcónValparaiso, Chile
    791.6×
  143. 142LiberpolisCounty of Osijek-Baranja, Croatia
    791.6×
  144. 144DüsseldorfNorth Rhine-Westphalia, Germany
    791.6×
  145. 144Český TěšínMoravian-Silesian Region, Czechia
    791.6×
  146. 144Puerto MonttLos Lagos Region, Chile
    791.6×
  147. 147Valašské MeziříčíZlín, Czechia
    791.6×
  148. 148BogotáBogota D.C., Colombia
    781.6×
  149. 149ĆuprijaCentral Serbia, Serbia
    781.6×
  150. 149HamburgHamburg, Germany
    781.6×
  151. 151NaplesCampania, Italy
    781.6×
  152. 151Mexico CityMexico City, Mexico
    781.6×
  153. 151ConcepciónBiobio, Chile
    781.6×
  154. 154Hat YaiSongkhla, Thailand
    781.6×
  155. 154Frýdek-MístekMoravian-Silesian Region, Czechia
    781.6×
  156. 156Bang KapiBangkok, Thailand
    771.6×
  157. 156VictoriaCentral and Western, Hong Kong
    771.6×
  158. 156RatingenNorth Rhine-Westphalia, Germany
    771.6×
  159. 156OytenLower Saxony, Germany
    771.6×
  160. 160BremerhavenBremen, Germany
    771.5×
  161. 161BangkokBangkok, Thailand
    771.5×
  162. 162Ban Samae DamBangkok, Thailand
    771.5×
  163. 162TalcaMaule Region, Chile
    771.5×
  164. 162Sai MaiBangkok, Thailand
    771.5×
  165. 165Şabāḩ as SālimMubārak al Kabīr, Kuwait
    771.5×
  166. 165Laem ChabangChon Buri, Thailand
    771.5×
  167. 167RuseRuse, Bulgaria
    771.5×
  168. 167TocopillaAntofagasta, Chile
    771.5×
  169. 169Sevlievolow-cost sensorsGabrovo, Bulgaria
    761.5×
  170. 169Gabrovolow-cost sensorsGabrovo, Bulgaria
    761.5×
  171. 169AricaArica y Parinacota Region, Chile
    761.5×
  172. 172BloemfonteinFree State, South Africa
    761.5×
  173. 172RancaguaO'Higgins Region, Chile
    761.5×
  174. 172AntofagastaAntofagasta, Chile
    761.5×
  175. 175Bang Bo DistrictSamut Prakan, Thailand
    761.5×
  176. 176Khlong LuangPathum Thani, Thailand
    761.5×
  177. 176ToruńKujawsko-Pomorskie, Poland
    761.5×
  178. 178PhuketPhuket, Thailand
    751.5×
  179. 178HavířovMoravian-Silesian Region, Czechia
    751.5×
  180. 178PueblaPuebla, Mexico
    751.5×
  181. 181FanlingNorth District, Hong Kong
    751.5×
  182. 181LimaLima Province, Peru
    751.5×
  183. 183YalaYala, Thailand
    751.5×
  184. 183Nong KhaemBangkok, Thailand
    751.5×
  185. 183Tin Shui WaiYuen Long, Hong Kong
    751.5×
  186. 183CauquenesMaule Region, Chile
    751.5×
  187. 187ItzehoeSchleswig-Holstein, Germany
    751.5×
  188. 188BergheimNorth Rhine-Westphalia, Germany
    751.5×
  189. 188Los ÁngelesBiobio, Chile
    751.5×
  190. 190EberswaldeBrandenburg, Germany
    741.4×
  191. 190Lak SiBangkok, Thailand
    741.4×
  192. 192Ban ChangRayong, Thailand
    741.4×
  193. 193ManamaManama, Bahrain
    741.4×
  194. 193Kwai ChungKwai Tsing District, Hong Kong
    741.4×
  195. 193OstravaMoravian-Silesian Region, Czechia
    741.4×
  196. 193ŁaskŁódź Voivodeship, Poland
    741.4×
  197. 193GarcíaNuevo León, Mexico
    741.4×
  198. 198Tai PoTai Po, Hong Kong
    741.4×
  199. 199Nakhon PathomNakhon Pathom, Thailand
    741.4×
  200. 199Frankfurt (Oder)Brandenburg, Germany
    741.4×

Top 200 of 1,456 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

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SmogRank, most polluted cities, PM2.5, April 8, 2023, smogrank.com/history/2023-04-08 (accessed 2 Oct 2026).

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