SmogRank / History / August 14, 2023

Most polluted cities on August 14, 2023

1,877 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.

← Piedras Negras 986.0 µg/m³ 900 µg/m³15 WHO 24-hour guideline
Every city ranked for August 14, 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. 1Piedras NegrasCoahuila, Mexico
    500+65.7×
  2. 2San CarlosÑuble, Chile
    2088.9×
  3. 3ChillánÑuble, Chile
    1978.1×
  4. 4Los ÁngelesBiobio, Chile
    1877.1×
  5. 5NacimientoBiobio, Chile
    1816.5×
  6. 6LinaresMaule Region, Chile
    1766.0×
  7. 7ManamaManama, Bahrain
    1655.0×
  8. 8CoyhaiqueAysén, Chile
    1644.9×
  9. 9Dhakalow-cost sensorsDhaka Division, Bangladesh
    1614.6×
  10. 10ZapopanJalisco, Mexico
    1554.0×
  11. 11CuricóMaule Region, Chile
    1473.6×
  12. 12HualquiBiobio, Chile
    1443.5×
  13. 13IlindenIlinden, North Macedonia
    1403.4×
  14. 14TemucoAraucania, Chile
    1383.4×
  15. 15CoronelBiobio, Chile
    1373.4×
  16. 16Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1363.3×
  17. 17Kampalalow-cost sensorsCentral Region, Uganda
    1353.3×
  18. 18KolkataWest Bengal, India
    1253.0×
  19. 19JakartaJakarta, Indonesia
    1222.9×
  20. 20Addis AbabaAddis Ababa, Ethiopia
    1222.9×
  21. 21Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1212.9×
  22. 22Puerto AysénAysén, Chile
    1172.8×
  23. 23DushanbeDushanbe, Tajikistan
    1172.8×
  24. 24TalaganteSantiago Metropolitan, Chile
    1162.8×
  25. 25Rouyn-NorandaQuebec, Canada
    1162.8×
  26. 26ToméBiobio, Chile
    1162.8×
  27. 27TalcaMaule Region, Chile
    1152.8×
  28. 28KigaliKigali, Rwanda
    1132.7×
  29. 28BakuBaki, Azerbaijan
    1132.7×
  30. 30RengoO'Higgins Region, Chile
    1102.6×
  31. 31SantiagoSantiago Metropolitan, Chile
    1082.6×
  32. 32Samut SakhonSamut Sakhon, Thailand
    1062.5×
  33. 33QuillotaValparaiso, Chile
    1062.5×
  34. 34Greater SudburyOntario, Canada
    1052.5×
  35. 35CauquenesMaule Region, Chile
    1052.5×
  36. 36AlexandriaAlexandria, Egypt
    1042.5×
  37. 37TalcahuanoBiobio, Chile
    1042.4×
  38. 38ChiguayanteBiobio, Chile
    1012.4×
  39. 39RancaguaO'Higgins Region, Chile
    992.3×
  40. 40Viña del MarValparaiso, Chile
    972.3×
  41. 41ConcepciónBiobio, Chile
    972.3×
  42. 42MexicaliBaja California, Mexico
    962.2×
  43. 43Lahorelow-cost sensorsPunjab, Pakistan
    952.2×
  44. 43CuranilahueBiobio, Chile
    952.2×
  45. 45San Pedro de la PazBiobio, Chile
    942.1×
  46. 46TlaquepaqueJalisco, Mexico
    932.1×
  47. 47Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    922.1×
  48. 48Santa Anita - Los FicusLima region, Peru
    922.1×
  49. 49Puente AltoSantiago Metropolitan, Chile
    922.1×
  50. 50Islamabadlow-cost sensorsIslamabad, Pakistan
    881.9×
  51. 51DelhiDelhi, India
    881.9×
  52. 52Prince AlbertSaskatchewan, Canada
    871.9×
  53. 53ChennaiTamil Nadu, India
    861.9×
  54. 54QuinteroValparaiso, Chile
    861.9×
  55. 55XonacatlánMéxico, Mexico
    851.8×
  56. 56Victoria de DurangoDurango, Mexico
    841.8×
  57. 57HyderabadTelangana, India
    831.8×
  58. 58San Francisco TlalcilalcalpanMéxico, Mexico
    821.7×
  59. 59MostaIl-Mosta, Malta
    821.7×
  60. 60HanoiHanoi, Vietnam
    821.7×
  61. 61BamakoBamako, Mali
    811.7×
  62. 62North BayOntario, Canada
    801.7×
  63. 63PristinaPristina, Kosovo
    801.7×
  64. 63Karachilow-cost sensorsSindh, Pakistan
    801.7×
  65. 63SarajevoFederation of B&H, Bosnia and Herzegovina
    801.7×
  66. 66KamloopsBritish Columbia, Canada
    801.6×
  67. 67Villa Poeta José Gálvez BarrenecheaLima region, Peru
    801.6×
  68. 67San Salvador TizatlalliMéxico, Mexico
    801.6×
  69. 69LotaBiobio, Chile
    801.6×
  70. 70ConcónValparaiso, Chile
    781.6×
  71. 71MinamataKumamoto, Japan
    781.6×
  72. 72GuangzhouGuangdong, China
    771.6×
  73. 73NairobiNairobi County, Kenya
    771.5×
  74. 73DěčínÚstí nad Labem Region, Czechia
    771.5×
  75. 75AntofagastaAntofagasta, Chile
    771.5×
  76. 76La UniónLos Ríos Region, Chile
    761.5×
  77. 77TolucaMéxico, Mexico
    761.5×
  78. 78VernonBritish Columbia, Canada
    751.5×
  79. 79AnconaThe Marches, Italy
    741.4×
  80. 80PrešovPrešov Region, Slovakia
    741.4×
  81. 81Puerto VarasLos Lagos Region, Chile
    741.4×
  82. 82LimaLima Province, Peru
    731.4×
  83. 83RoseburgOregon, United States
    731.4×
  84. 84CoquimboCoquimbo Region, Chile
    731.4×
  85. 85Tha BoNong Khai, Thailand
    721.4×
  86. 86Ciudad JuárezChihuahua, Mexico
    721.4×
  87. 87Nong KhaemBangkok, Thailand
    711.3×
  88. 88Puerto MonttLos Lagos Region, Chile
    711.3×
  89. 89BeijingBeijing, China
    711.3×
  90. 90NiskoSubcarpathia, Poland
    711.3×
  91. 91ShintomiMiyazaki, Japan
    701.3×
  92. 91San Francisco De BorjaLima region, Peru
    701.3×
  93. 93CopiapóAtacama, Chile
    701.3×
  94. 94BratislavaBratislava Region, Slovakia
    701.3×
  95. 95Kathmandulow-cost sensorsBagmati Province, Nepal
    701.3×
  96. 96KielceŚwiętokrzyskie, Poland
    691.3×
  97. 96Fort McMurrayAlberta, Canada
    691.3×
  98. 98Ulu BedokSingapore
    691.3×
  99. 99MiyazakiMiyazaki, Japan
    691.3×
  100. 99NaplesCampania, Italy
    691.3×
  101. 101RadomskoŁódź Voivodeship, Poland
    691.2×
  102. 101JesiThe Marches, Italy
    691.2×
  103. 103SenicaTrnava Region, Slovakia
    691.2×
  104. 104LublinLublin, Poland
    681.2×
  105. 105SliemaTas-Sliema, Malta
    681.2×
  106. 106KošiceKošice Region, Slovakia
    681.2×
  107. 106TakanabeMiyazaki, Japan
    681.2×
  108. 106CatañoCataño, Puerto Rico
    681.2×
  109. 109MiyakonojōMiyazaki, Japan
    671.2×
  110. 109KrakówLesser Poland, Poland
    671.2×
  111. 109AricaArica y Parinacota Region, Chile
    671.2×
  112. 112NichinanMiyazaki, Japan
    671.2×
  113. 113DębicaSubcarpathia, Poland
    671.2×
  114. 114Spišská Nová VesKošice Region, Slovakia
    671.2×
  115. 114Lagoslow-cost sensorsLagos, Nigeria
    671.2×
  116. 116Bang Bo DistrictSamut Prakan, Thailand
    671.2×
  117. 116Las Palmas de Gran CanariaCanary Islands, Spain
    671.2×
  118. 118Ang Mo Kio New TownSingapore
    661.2×
  119. 119Phra PradaengSamut Prakan, Thailand
    661.1×
  120. 119HonmachiKumamoto, Japan
    661.1×
  121. 119AlgiersAlgiers, Algeria
    661.1×
  122. 119Ciudad ApodacaNuevo León, Mexico
    661.1×
  123. 123Wan ChaiWan Chai, Hong Kong
    661.1×
  124. 123WolfsbergCarinthia, Austria
    661.1×
  125. 125Banja LukaSrpska, Bosnia and Herzegovina
    661.1×
  126. 126LitvínovÚstí nad Labem Region, Czechia
    661.1×
  127. 126KirishimaKagoshima, Japan
    661.1×
  128. 128BangkokBangkok, Thailand
    651.1×
  129. 128TocopillaAntofagasta, Chile
    651.1×
  130. 128AlbanyOregon, United States
    651.1×
  131. 128HyūgaMiyazaki, Japan
    651.1×
  132. 132AntananarivoAnalamanga, Madagascar
    651.1×
  133. 133KladnoCentral Bohemia, Czechia
    651.1×
  134. 134Vranov nad TopľouPrešov Region, Slovakia
    651.1×
  135. 134ColomboWestern Province, Sri Lanka
    651.1×
  136. 134KushikinoKagoshima, Japan
    651.1×
  137. 134KobayashiMiyazaki, Japan
    651.1×
  138. 134TrnavaTrnava Region, Slovakia
    651.1×
  139. 134BarrieOntario, Canada
    651.1×
  140. 140StarachowiceŚwiętokrzyskie, Poland
    651.1×
  141. 140ŻabbarĦaż-Żabbar, Malta
    651.1×
  142. 140ValdiviaLos Ríos Region, Chile
    651.1×
  143. 143KaliszGreater Poland, Poland
    641.1×
  144. 143Fort LauderdaleFlorida, United States
    641.1×
  145. 145Santa Cruz de TenerifeCanary Islands, Spain
    641.1×
  146. 145AlessandriaPiedmont, Italy
    641.1×
  147. 145MinamikyushuKagoshima, Japan
    641.1×
  148. 148Santa CatarinaNuevo León, Mexico
    641.1×
  149. 148FontanaCalifornia, United States
    641.1×
  150. 150Klagenfurt am WörtherseeCarinthia, Austria
    631.1×
  151. 151HumennéPrešov Region, Slovakia
    631.0×
  152. 151IyoEhime, Japan
    631.0×
  153. 153MartinŽilina Region, Slovakia
    631.0×
  154. 153CalamaAntofagasta, Chile
    631.0×
  155. 153ShreveportLouisiana, United States
    631.0×
  156. 153KelownaBritish Columbia, Canada
    631.0×
  157. 157AlgecirasAndalusia, Spain
    631.0×
  158. 158ZamośćLublin, Poland
    631.0×
  159. 158PassauBavaria, Germany
    631.0×
  160. 158ŽilinaŽilina Region, Slovakia
    631.0×
  161. 158KatowiceSilesia, Poland
    631.0×
  162. 158HoustonTexas, United States
    631.0×
  163. 163Falconara MarittimaThe Marches, Italy
    631.0×
  164. 164BelgradeCentral Serbia, Serbia
    621.0×
  165. 164Khlong LuangPathum Thani, Thailand
    621.0×
  166. 164ShenyangLiaoning, China
    621.0×
  167. 164La Línea de la ConcepciónAndalusia, Spain
    621.0×
  168. 164GapProvence-Alpes-Côte d'Azur, France
    621.0×
  169. 164NitraNitra Region, Slovakia
    621.0×
  170. 164BermeoBasque Country, Spain
    621.0×
  171. 164JacksonMississippi, United States
    621.0×
  172. 172HueytownAlabama, United States
    621.0×
  173. 173SiedlceMazovia, Poland
    621.0×
  174. 173SendaiKagoshima, Japan
    621.0×
  175. 175Nakhon PathomNakhon Pathom, Thailand
    621.0×
  176. 175KochiKochi, Japan
    621.0×
  177. 175ZnojmoSouth Moravian, Czechia
    621.0×
  178. 175KadaňÚstí nad Labem Region, Czechia
    621.0×
  179. 175ValdemoroMadrid, Spain
    621.0×
  180. 180BitolaBitola, North Macedonia
    611.0×
  181. 181KagoshimaKagoshima, Japan
    611.0×
  182. 181IkedachōTokushima, Japan
    611.0×
  183. 181Český TěšínMoravian-Silesian Region, Czechia
    611.0×
  184. 181La SerenaCoquimbo Region, Chile
    611.0×
  185. 181Ciudad Benito JuárezNuevo León, Mexico
    611.0×
  186. 181SalemOregon, United States
    611.0×
  187. 187SninaPrešov Region, Slovakia
    611.0×
  188. 187TarnówLesser Poland, Poland
    611.0×
  189. 187LegionowoMazovia, Poland
    611.0×
  190. 190NobeokaMiyazaki, Japan
    611.0×
  191. 190IzumiKagoshima, Japan
    611.0×
  192. 190BohumínMoravian-Silesian Region, Czechia
    611.0×
  193. 190Jastrzębie ZdrójSilesia, Poland
    611.0×
  194. 190CholulaPuebla, Mexico
    611.0×
  195. 190AtlantaGeorgia, United States
    611.0×
  196. 196San RoqueAndalusia, Spain
    610.9×
  197. 196MostÚstí nad Labem Region, Czechia
    610.9×
  198. 196České BudějoviceSouth Bohemian Region, Czechia
    610.9×
  199. 199GrazStyria, Austria
    600.9×
  200. 199AustinTexas, United States
    600.9×

Top 200 of 1,877 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, August 14, 2023, smogrank.com/history/2023-08-14 (accessed 2 Oct 2026).

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