SmogRank / History / April 5, 2023

Most polluted cities on April 5, 2023

1,492 cities ranked by their average PM2.5 over the day; the worst was Reykjavík, Iceland, at 368.2 µg/m³. Each city's own local calendar day.

Bad-air episodes during April 5, 2023. All episodes.

← Reykjavík 368.2 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every city ranked for April 5, 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. 1ReykjavíkCapital Region, Iceland
    500+24.5×
  2. 2Mae SaiChiang Rai, Thailand
    30815.3×
  3. 3ShenyangLiaoning, China
    28714.1×
  4. 4Ban HouakhouaBokeo, Laos
    25712.1×
  5. 5PhayaoPhayao, Thailand
    2209.7×
  6. 6NanNan, Thailand
    2149.3×
  7. 7N'DjamenaN’Djaména, Chad
    2088.9×
  8. 8Chiang MaiChiang Mai, Thailand
    2048.6×
  9. 9LampangLampang, Thailand
    1968.0×
  10. 10Chiang RaiChiang Rai, Thailand
    1957.9×
  11. 11PhraePhrae, Thailand
    1937.7×
  12. 12Tha BoNong Khai, Thailand
    1907.4×
  13. 13LoeiLoei, Thailand
    1856.9×
  14. 14PakxanBolikhamsai, Laos
    1836.7×
  15. 15LamphunLamphun, Thailand
    1806.4×
  16. 16BamakoBamako, Mali
    1796.4×
  17. 17Bang Khun ThianBangkok, Thailand
    1705.5×
  18. 18CholulaPuebla, Mexico
    1695.4×
  19. 19Nong Bua LamphuNong Bua Lamphu, Thailand
    1614.7×
  20. 20UttaraditUttaradit, Thailand
    1594.5×
  21. 21PhichitPhichit, Thailand
    1594.5×
  22. 22Lahorelow-cost sensorsPunjab, Pakistan
    1594.4×
  23. 23Kamphaeng PhetKamphaeng Phet, Thailand
    1594.4×
  24. 24Nakhon SawanNakhon Sawan, Thailand
    1574.3×
  25. 25Dhakalow-cost sensorsDhaka Division, Bangladesh
    1574.2×
  26. 26AlexandriaAlexandria, Egypt
    1564.2×
  27. 27Chai NatChai Nat, Thailand
    1554.1×
  28. 28Suphan BuriSuphan Buri, Thailand
    1554.0×
  29. 29BloemfonteinFree State, South Africa
    1533.9×
  30. 30HanoiHanoi, Vietnam
    1523.8×
  31. 30TlaquepaqueJalisco, Mexico
    1523.8×
  32. 32OsornoLos Lagos Region, Chile
    1513.7×
  33. 33Lop BuriLopburi, Thailand
    1473.6×
  34. 34Bang NaBangkok, Thailand
    1463.6×
  35. 35Puerto VarasLos Lagos Region, Chile
    1453.6×
  36. 36PhetchabunPhetchabun, Thailand
    1453.5×
  37. 37Sing BuriSing Buri, Thailand
    1423.5×
  38. 38BaghdadBaghdad, Iraq
    1413.4×
  39. 39MukdahanMukdahan, Thailand
    1413.4×
  40. 40Mae SotTak, Thailand
    1403.4×
  41. 41Puerto MonttLos Lagos Region, Chile
    1393.4×
  42. 42RatchaburiRatchaburi, Thailand
    1383.4×
  43. 43Ciudad Benito JuárezNuevo León, Mexico
    1383.4×
  44. 44CoyhaiqueAysén, Chile
    1383.4×
  45. 45SukhothaiSukhothai, Thailand
    1373.3×
  46. 46Nong KhaemBangkok, Thailand
    1373.3×
  47. 47ChaiyaphumChaiyaphum, Thailand
    1363.3×
  48. 48Khlong Sam WaBangkok, Thailand
    1343.3×
  49. 49Khon KaenKhon Kaen, Thailand
    1343.2×
  50. 49Ban Samae DamBangkok, Thailand
    1343.2×
  51. 51Ubon RatchathaniUbon Ratchathani, Thailand
    1333.2×
  52. 52KalasinKalasin, Thailand
    1313.2×
  53. 53Samut PrakanSamut Prakan, Thailand
    1293.1×
  54. 53BangkokBangkok, Thailand
    1293.1×
  55. 55Sakon NakhonSakon Nakhon, Thailand
    1263.0×
  56. 56Roi EtRoi Et, Thailand
    1263.0×
  57. 57Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    1253.0×
  58. 58Lak SiBangkok, Thailand
    1243.0×
  59. 58Saphan SungBangkok, Thailand
    1243.0×
  60. 60Khan Na YaoBangkok, Thailand
    1233.0×
  61. 61Bueng KumBangkok, Thailand
    1233.0×
  62. 62KanchanaburiKanchanaburi, Thailand
    1222.9×
  63. 63Nakhon RatchasimaNakhon Ratchasima, Thailand
    1222.9×
  64. 64Bang KapiBangkok, Thailand
    1222.9×
  65. 65DelhiDelhi, India
    1212.9×
  66. 66Mueang NonthaburiNonthaburi, Thailand
    1212.9×
  67. 67Nakhon PathomNakhon Pathom, Thailand
    1202.9×
  68. 68San Mateo AtencoMéxico, Mexico
    1202.9×
  69. 69SaraburiSaraburi, Thailand
    1192.9×
  70. 70Sai MaiBangkok, Thailand
    1192.9×
  71. 71CuranilahueBiobio, Chile
    1172.8×
  72. 72Khlong LuangPathum Thani, Thailand
    1162.8×
  73. 73CelayaGuanajuato, Mexico
    1142.7×
  74. 74Ban Khlong PrawetBangkok, Thailand
    1142.7×
  75. 75Nong ChokBangkok, Thailand
    1142.7×
  76. 76NacimientoBiobio, Chile
    1132.7×
  77. 77Samut SakhonSamut Sakhon, Thailand
    1132.7×
  78. 78CayenneGuyane, French Guiana
    1112.6×
  79. 79Kathmandulow-cost sensorsBagmati Province, Nepal
    1112.6×
  80. 80ConakryConakry, Guinea
    1112.6×
  81. 81Jastrzębie ZdrójSilesia, Poland
    1112.6×
  82. 82Phra PradaengSamut Prakan, Thailand
    1102.6×
  83. 83Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1092.6×
  84. 84RabinalBaja Verapaz, Guatemala
    1082.5×
  85. 84Guatemala CityGuatemala, Guatemala
    1082.5×
  86. 86HyderabadTelangana, India
    1072.5×
  87. 87Si Maha PhotPrachin Buri, Thailand
    1062.5×
  88. 87Lat KrabangBangkok, Thailand
    1062.5×
  89. 89TakTak, Thailand
    1052.5×
  90. 90XonacatlánMéxico, Mexico
    1032.4×
  91. 91TolucaMéxico, Mexico
    1012.4×
  92. 92Buri RamBuriram, Thailand
    1012.4×
  93. 93Hua HinPrachuap Khiri Khan, Thailand
    1002.4×
  94. 94Ciudad NezahualcoyotlMéxico, Mexico
    972.3×
  95. 94MexicaliBaja California, Mexico
    972.3×
  96. 96Si Sa KetSi Sa Ket, Thailand
    972.2×
  97. 97San Francisco TlalcilalcalpanMéxico, Mexico
    962.2×
  98. 97HualquiBiobio, Chile
    962.2×
  99. 99PueblaPuebla, Mexico
    962.2×
  100. 100ValjevoCentral Serbia, Serbia
    962.2×
  101. 101ZapopanJalisco, Mexico
    942.1×
  102. 102PristinaPristina, Kosovo
    932.1×
  103. 103Gómez PalacioDurango, Mexico
    932.1×
  104. 104Santa CatarinaNuevo León, Mexico
    922.1×
  105. 105TemucoAraucania, Chile
    922.1×
  106. 106Bang Bo DistrictSamut Prakan, Thailand
    912.1×
  107. 106Laem ChabangChon Buri, Thailand
    912.1×
  108. 108Islamabadlow-cost sensorsIslamabad, Pakistan
    912.0×
  109. 108RoeselareFlanders, Belgium
    912.0×
  110. 110IzegemFlanders, Belgium
    902.0×
  111. 110Ciudad General EscobedoNuevo León, Mexico
    902.0×
  112. 112Abujalow-cost sensorsFCT, Nigeria
    902.0×
  113. 112MonterreyNuevo León, Mexico
    902.0×
  114. 114KatowiceSilesia, Poland
    902.0×
  115. 115Novi PazarCentral Serbia, Serbia
    902.0×
  116. 115Santiago de QuerétaroQuerétaro, Mexico
    902.0×
  117. 117RoubaixHauts-de-France, France
    902.0×
  118. 117RacibórzSilesia, Poland
    902.0×
  119. 119Pachuca de SotoHidalgo, Mexico
    892.0×
  120. 119GarcíaNuevo León, Mexico
    892.0×
  121. 121Ban Talat BuengChon Buri, Thailand
    892.0×
  122. 122Naucalpan de JuárezMéxico, Mexico
    881.9×
  123. 123GuadalajaraJalisco, Mexico
    881.9×
  124. 124EvergemFlanders, Belgium
    881.9×
  125. 124Czechowice-DziedziceSilesia, Poland
    881.9×
  126. 126MenenFlanders, Belgium
    881.9×
  127. 127Banja LukaSrpska, Bosnia and Herzegovina
    881.9×
  128. 128Ban ChangRayong, Thailand
    871.9×
  129. 129's-GravenzandeSouth Holland, The Netherlands
    871.9×
  130. 129NîmesOccitanie, France
    871.9×
  131. 131QuillotaValparaiso, Chile
    861.9×
  132. 132La UniónLos Ríos Region, Chile
    861.9×
  133. 133ShanghaiShanghai, China
    851.8×
  134. 134Mexico CityMexico City, Mexico
    851.8×
  135. 135CuernavacaMorelos, Mexico
    851.8×
  136. 136GuangzhouGuangdong, China
    841.8×
  137. 136MaldegemFlanders, Belgium
    841.8×
  138. 138AricaArica y Parinacota Region, Chile
    841.8×
  139. 139Şabāḩ as SālimMubārak al Kabīr, Kuwait
    841.8×
  140. 139Ciudad ApodacaNuevo León, Mexico
    841.8×
  141. 141Tepeji del Río de OcampoHidalgo, Mexico
    841.8×
  142. 141Puerto AysénAysén, Chile
    841.8×
  143. 143Kampalalow-cost sensorsCentral Region, Uganda
    841.8×
  144. 143Bielsko-BialaSilesia, Poland
    841.8×
  145. 145Viña del MarValparaiso, Chile
    831.8×
  146. 145QuinteroValparaiso, Chile
    831.8×
  147. 147Almatylow-cost sensorsAlmaty, Kazakhstan
    831.8×
  148. 148RayongRayong, Thailand
    831.7×
  149. 148RancaguaO'Higgins Region, Chile
    831.7×
  150. 150SantiagoSantiago Metropolitan, Chile
    831.7×
  151. 151LinaresMaule Region, Chile
    821.7×
  152. 152Ga-RankuwaNorth West, South Africa
    821.7×
  153. 153MumbaiMaharashtra, India
    821.7×
  154. 153LilleHauts-de-France, France
    821.7×
  155. 155KortrijkFlanders, Belgium
    821.7×
  156. 156BohumínMoravian-Silesian Region, Czechia
    821.7×
  157. 157ConcónValparaiso, Chile
    811.7×
  158. 158Puente AltoSantiago Metropolitan, Chile
    811.7×
  159. 159ŁaskŁódź Voivodeship, Poland
    811.7×
  160. 159Cadereyta JiménezNuevo León, Mexico
    811.7×
  161. 161HavířovMoravian-Silesian Region, Czechia
    801.7×
  162. 162KłodzkoLower Silesia, Poland
    801.7×
  163. 162León de los AldamaGuanajuato, Mexico
    801.7×
  164. 164ValdiviaLos Ríos Region, Chile
    801.6×
  165. 164TalaganteSantiago Metropolitan, Chile
    801.6×
  166. 166CoronelBiobio, Chile
    801.6×
  167. 167KhartoumKhartoum, Sudan
    791.6×
  168. 167PruszkówMazovia, Poland
    791.6×
  169. 167Los ÁngelesBiobio, Chile
    791.6×
  170. 167SalamancaGuanajuato, Mexico
    791.6×
  171. 171ŻyrardówMazovia, Poland
    791.6×
  172. 171GraysEngland, United Kingdom
    791.6×
  173. 171KutnoŁódź Voivodeship, Poland
    791.6×
  174. 171CuricóMaule Region, Chile
    791.6×
  175. 171EdinburgTexas, United States
    791.6×
  176. 176LochristiFlanders, Belgium
    791.6×
  177. 176GentFlanders, Belgium
    791.6×
  178. 178AntwerpFlanders, Belgium
    781.6×
  179. 178Frýdek-MístekMoravian-Silesian Region, Czechia
    781.6×
  180. 178BogotáBogota D.C., Colombia
    781.6×
  181. 181KapellenFlanders, Belgium
    781.6×
  182. 181Kędzierzyn-KoźleOpole Voivodeship, Poland
    781.6×
  183. 183KoksijdeFlanders, Belgium
    781.6×
  184. 184RadomMazovia, Poland
    781.6×
  185. 184Jelenia GóraLower Silesia, Poland
    781.6×
  186. 186PirotCentral Serbia, Serbia
    771.6×
  187. 186MaassluisSouth Holland, The Netherlands
    771.6×
  188. 188San CarlosÑuble, Chile
    771.5×
  189. 189KrapkowiceOpole Voivodeship, Poland
    771.5×
  190. 189VeracruzVeracruz, Mexico
    771.5×
  191. 189Canvey IslandEngland, United Kingdom
    771.5×
  192. 192TalcaMaule Region, Chile
    771.5×
  193. 193CoulommiersÎle-de-France, France
    761.5×
  194. 193BéthuneHauts-de-France, France
    761.5×
  195. 195TalcahuanoBiobio, Chile
    761.5×
  196. 196Surat ThaniSurat Thani, Thailand
    761.5×
  197. 196RengoO'Higgins Region, Chile
    761.5×
  198. 198JohannesburgGauteng, South Africa
    761.5×
  199. 199LazarevacCentral Serbia, Serbia
    751.5×
  200. 199KlerksdorpNorth West, South Africa
    751.5×

Top 200 of 1,492 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 5, 2023, smogrank.com/history/2023-04-05 (accessed 2 Oct 2026).

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