SmogRank / History / April 6, 2023

Most polluted cities on April 6, 2023

1,246 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 213.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during April 6, 2023. All episodes.

← N'Djamena 213.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for April 6, 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. 1N'DjamenaN’Djaména, Chad
    28814.2×
  2. 2Tha BoNong Khai, Thailand
    25712.1×
  3. 3Bang Khun ThianBangkok, Thailand
    1806.4×
  4. 4Dhakalow-cost sensorsDhaka Division, Bangladesh
    1705.5×
  5. 5BamakoBamako, Mali
    1675.3×
  6. 6Lahorelow-cost sensorsPunjab, Pakistan
    1594.5×
  7. 7Nong KhaemBangkok, Thailand
    1554.1×
  8. 8Tepeji del Río de OcampoHidalgo, Mexico
    1544.0×
  9. 9HanoiHanoi, Vietnam
    1523.8×
  10. 10HyderabadTelangana, India
    1493.7×
  11. 11Kathmandulow-cost sensorsBagmati Province, Nepal
    1483.6×
  12. 12Nakhon PathomNakhon Pathom, Thailand
    1483.6×
  13. 13Samut SakhonSamut Sakhon, Thailand
    1423.5×
  14. 14TlaquepaqueJalisco, Mexico
    1403.4×
  15. 15San Mateo AtencoMéxico, Mexico
    1383.4×
  16. 16Mueang NonthaburiNonthaburi, Thailand
    1363.3×
  17. 16ConakryConakry, Guinea
    1363.3×
  18. 16CholulaPuebla, Mexico
    1363.3×
  19. 19BangkokBangkok, Thailand
    1323.2×
  20. 20Khlong LuangPathum Thani, Thailand
    1303.2×
  21. 21ShanghaiShanghai, China
    1303.1×
  22. 22Samut PrakanSamut Prakan, Thailand
    1222.9×
  23. 23ShenyangLiaoning, China
    1182.8×
  24. 24YangonYangon, Myanmar
    1172.8×
  25. 25PécsBaranya, Hungary
    1162.8×
  26. 26Phra PradaengSamut Prakan, Thailand
    1162.8×
  27. 27CelayaGuanajuato, Mexico
    1152.8×
  28. 28BaghdadBaghdad, Iraq
    1152.7×
  29. 29BohumínMoravian-Silesian Region, Czechia
    1132.7×
  30. 30Frýdek-MístekMoravian-Silesian Region, Czechia
    1122.7×
  31. 31CayenneGuyane, French Guiana
    1102.6×
  32. 32NišCentral Serbia, Serbia
    1082.6×
  33. 33AlexandriaAlexandria, Egypt
    1072.5×
  34. 33RabinalBaja Verapaz, Guatemala
    1072.5×
  35. 33Guatemala CityGuatemala, Guatemala
    1072.5×
  36. 36XonacatlánMéxico, Mexico
    1052.5×
  37. 36TolucaMéxico, Mexico
    1052.5×
  38. 38HavířovMoravian-Silesian Region, Czechia
    1042.4×
  39. 39PristinaPristina, Kosovo
    1032.4×
  40. 40Bang KapiBangkok, Thailand
    1032.4×
  41. 41OstravaMoravian-Silesian Region, Czechia
    1002.4×
  42. 42MexicaliBaja California, Mexico
    1002.4×
  43. 43ManamaManama, Bahrain
    992.3×
  44. 43MumbaiMaharashtra, India
    992.3×
  45. 43San Francisco TlalcilalcalpanMéxico, Mexico
    992.3×
  46. 46DelhiDelhi, India
    972.2×
  47. 47Bang Bo DistrictSamut Prakan, Thailand
    962.2×
  48. 48Valašské MeziříčíZlín, Czechia
    952.2×
  49. 49Český TěšínMoravian-Silesian Region, Czechia
    952.2×
  50. 50CoyhaiqueAysén, Chile
    952.2×
  51. 51Banja LukaSrpska, Bosnia and Herzegovina
    922.1×
  52. 52Ciudad NezahualcoyotlMéxico, Mexico
    912.0×
  53. 53Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    902.0×
  54. 54Şabāḩ as SālimMubārak al Kabīr, Kuwait
    902.0×
  55. 55Kampalalow-cost sensorsCentral Region, Uganda
    871.9×
  56. 56Santiago de QuerétaroQuerétaro, Mexico
    861.9×
  57. 57PueblaPuebla, Mexico
    861.9×
  58. 58TocopillaAntofagasta, Chile
    861.9×
  59. 58San Luis PotosíSan Luis Potosí, Mexico
    861.9×
  60. 60TemucoAraucania, Chile
    851.8×
  61. 61Naucalpan de JuárezMéxico, Mexico
    851.8×
  62. 62NîmesOccitanie, France
    841.8×
  63. 62SalamancaGuanajuato, Mexico
    841.8×
  64. 64BelgradeCentral Serbia, Serbia
    841.8×
  65. 64RancaguaO'Higgins Region, Chile
    841.8×
  66. 66KhartoumKhartoum, Sudan
    841.8×
  67. 66OsornoLos Lagos Region, Chile
    841.8×
  68. 68Puente AltoSantiago Metropolitan, Chile
    831.8×
  69. 68LinaresMaule Region, Chile
    831.8×
  70. 70Puerto VarasLos Lagos Region, Chile
    831.8×
  71. 71GuanajuatoGuanajuato, Mexico
    831.8×
  72. 72ŽilinaŽilina Region, Slovakia
    831.7×
  73. 73Pachuca de SotoHidalgo, Mexico
    831.7×
  74. 74Almatylow-cost sensorsAlmaty, Kazakhstan
    821.7×
  75. 74Puerto MonttLos Lagos Region, Chile
    821.7×
  76. 76Mexico CityMexico City, Mexico
    821.7×
  77. 77TijuanaBaja California, Mexico
    811.7×
  78. 78CuernavacaMorelos, Mexico
    811.7×
  79. 79CuranilahueBiobio, Chile
    811.7×
  80. 80DěčínÚstí nad Labem Region, Czechia
    801.7×
  81. 81BogotáBogota D.C., Colombia
    801.7×
  82. 81ValdiviaLos Ríos Region, Chile
    801.7×
  83. 81San Miguel de AllendeGuanajuato, Mexico
    801.7×
  84. 84MostÚstí nad Labem Region, Czechia
    801.6×
  85. 84ZapopanJalisco, Mexico
    801.6×
  86. 86QuinteroValparaiso, Chile
    801.6×
  87. 87SantiagoSantiago Metropolitan, Chile
    801.6×
  88. 88QuillotaValparaiso, Chile
    791.6×
  89. 89Abujalow-cost sensorsFCT, Nigeria
    791.6×
  90. 90San Luis de la PazGuanajuato, Mexico
    791.6×
  91. 91RengoO'Higgins Region, Chile
    791.6×
  92. 91GuadalajaraJalisco, Mexico
    791.6×
  93. 93CuricóMaule Region, Chile
    781.6×
  94. 94GuangzhouGuangdong, China
    781.6×
  95. 95León de los AldamaGuanajuato, Mexico
    771.5×
  96. 96JeddahMecca Region, Saudi Arabia
    771.5×
  97. 97Addis AbabaAddis Ababa, Ethiopia
    771.5×
  98. 98Islamabadlow-cost sensorsIslamabad, Pakistan
    761.5×
  99. 99VeracruzVeracruz, Mexico
    761.5×
  100. 99TalaganteSantiago Metropolitan, Chile
    761.5×
  101. 101AntofagastaAntofagasta, Chile
    761.5×
  102. 102AlessandriaPiedmont, Italy
    751.5×
  103. 103San Andrés TuxtlaVeracruz, Mexico
    751.5×
  104. 104AricaArica y Parinacota Region, Chile
    751.5×
  105. 105Karachilow-cost sensorsSindh, Pakistan
    751.5×
  106. 106NacimientoBiobio, Chile
    741.4×
  107. 107IrapuatoGuanajuato, Mexico
    741.4×
  108. 108ConcónValparaiso, Chile
    741.4×
  109. 109Ciudad Benito JuárezNuevo León, Mexico
    731.4×
  110. 110KrefeldNorth Rhine-Westphalia, Germany
    731.4×
  111. 110PraguePrague, Czechia
    731.4×
  112. 110La SerenaCoquimbo Region, Chile
    731.4×
  113. 110AbasoloGuanajuato, Mexico
    731.4×
  114. 114Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    721.4×
  115. 115BerounCentral Bohemia, Czechia
    721.4×
  116. 116IzegemFlanders, Belgium
    721.4×
  117. 116SenicaTrnava Region, Slovakia
    721.4×
  118. 118TrenčínTrenčín Region, Slovakia
    721.4×
  119. 119Accralow-cost sensorsGreater Accra, Ghana
    711.3×
  120. 119Viña del MarValparaiso, Chile
    711.3×
  121. 121LochristiFlanders, Belgium
    711.3×
  122. 122BremenBremen, Germany
    711.3×
  123. 123Puerto AysénAysén, Chile
    711.3×
  124. 123GarcíaNuevo León, Mexico
    711.3×
  125. 125BakuBaki, Azerbaijan
    701.3×
  126. 125Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    701.3×
  127. 125OldenburgLower Saxony, Germany
    701.3×
  128. 125PilsenPlzeň Region, Czechia
    701.3×
  129. 129HualpénBiobio, Chile
    701.3×
  130. 129CoquimboCoquimbo Region, Chile
    701.3×
  131. 131AntananarivoAnalamanga, Madagascar
    701.3×
  132. 132PartizánskeTrenčín Region, Slovakia
    691.3×
  133. 133WillebroekFlanders, Belgium
    691.3×
  134. 134PrievidzaTrenčín Region, Slovakia
    691.3×
  135. 134MartinŽilina Region, Slovakia
    691.3×
  136. 134CopiapóAtacama, Chile
    691.3×
  137. 134LiberpolisCounty of Osijek-Baranja, Croatia
    691.3×
  138. 138GyőrGyőr-Moson-Sopron, Hungary
    691.2×
  139. 139HualquiBiobio, Chile
    691.2×
  140. 140EvergemFlanders, Belgium
    681.2×
  141. 140MühlhausenThuringia, Germany
    681.2×
  142. 142AnsbachBavaria, Germany
    681.2×
  143. 142CoronelBiobio, Chile
    681.2×
  144. 144KasselHesse, Germany
    681.2×
  145. 144CoatzacoalcosVeracruz, Mexico
    681.2×
  146. 144TalcaMaule Region, Chile
    681.2×
  147. 144ChillánÑuble, Chile
    681.2×
  148. 144CauquenesMaule Region, Chile
    681.2×
  149. 149RužomberokŽilina Region, Slovakia
    681.2×
  150. 149OlomoucOlomouc Region, Czechia
    681.2×
  151. 151JakartaJakarta, Indonesia
    671.2×
  152. 151Frankfurt (Oder)Brandenburg, Germany
    671.2×
  153. 151La UniónLos Ríos Region, Chile
    671.2×
  154. 151BethlehemPennsylvania, United States
    671.2×
  155. 155Botevgradlow-cost sensorsSofia, Bulgaria
    671.2×
  156. 156KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    671.2×
  157. 156ColomboWestern Province, Sri Lanka
    671.2×
  158. 156Las Palmas de Gran CanariaCanary Islands, Spain
    671.2×
  159. 159WarsteinNorth Rhine-Westphalia, Germany
    671.2×
  160. 159JülichNorth Rhine-Westphalia, Germany
    671.2×
  161. 161BellinzonaTicino, Switzerland
    661.2×
  162. 161BeverenFlanders, Belgium
    661.2×
  163. 161MannheimBaden-Wurttemberg, Germany
    661.2×
  164. 161ThionvilleGrand Est, France
    661.2×
  165. 161BolzanoTrentino-Alto Adige, Italy
    661.2×
  166. 166AntwerpFlanders, Belgium
    661.2×
  167. 166Ludwigshafen am RheinRheinland-Pfalz, Germany
    661.2×
  168. 166ValenciennesHauts-de-France, France
    661.2×
  169. 169MaldegemFlanders, Belgium
    661.1×
  170. 169DuisburgNorth Rhine-Westphalia, Germany
    661.1×
  171. 169TrnavaTrnava Region, Slovakia
    661.1×
  172. 172MünsterNorth Rhine-Westphalia, Germany
    661.1×
  173. 172KielSchleswig-Holstein, Germany
    661.1×
  174. 174BelmopanCayo District, Belize
    661.1×
  175. 174Warner RobinsGeorgia, United States
    661.1×
  176. 176ArrecifeCanary Islands, Spain
    661.1×
  177. 176KladnoCentral Bohemia, Czechia
    661.1×
  178. 178MonsWallonia, Belgium
    651.1×
  179. 178UlmBaden-Wurttemberg, Germany
    651.1×
  180. 180Halle (Saale)Saxony-Anhalt, Germany
    651.1×
  181. 181San IsidroCanary Islands, Spain
    651.1×
  182. 181WeidenBavaria, Germany
    651.1×
  183. 181FriesoytheLower Saxony, Germany
    651.1×
  184. 181DattelnNorth Rhine-Westphalia, Germany
    651.1×
  185. 181BorkenNorth Rhine-Westphalia, Germany
    651.1×
  186. 181České BudějoviceSouth Bohemian Region, Czechia
    651.1×
  187. 187MolFlanders, Belgium
    651.1×
  188. 187MenenFlanders, Belgium
    651.1×
  189. 187KapellenFlanders, Belgium
    651.1×
  190. 187LudwigsburgBaden-Wurttemberg, Germany
    651.1×
  191. 187ZnojmoSouth Moravian, Czechia
    651.1×
  192. 187ToméBiobio, Chile
    651.1×
  193. 193Saint-QuentinHauts-de-France, France
    651.1×
  194. 193GainesvilleGeorgia, United States
    651.1×
  195. 195Spišská Nová VesKošice Region, Slovakia
    641.1×
  196. 195FriedrichshafenBaden-Wurttemberg, Germany
    641.1×
  197. 195ŽideniceSouth Moravian, Czechia
    641.1×
  198. 195Ústí nad LabemÚstí nad Labem Region, Czechia
    641.1×
  199. 195TalcahuanoBiobio, Chile
    641.1×
  200. 195San Pedro de la PazBiobio, Chile
    641.1×

Top 200 of 1,246 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 6, 2023, smogrank.com/history/2023-04-06 (accessed 2 Oct 2026).

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