SmogRank / History / August 8, 2023

Most polluted cities on August 8, 2023

1,849 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 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. 1Piedras NegrasCoahuila, Mexico
    500+65.7×
  2. 2CoyhaiqueAysén, Chile
    23310.5×
  3. 3OsornoLos Lagos Region, Chile
    2159.3×
  4. 4NacimientoBiobio, Chile
    2119.1×
  5. 5BurgosCastille and León, Spain
    1846.8×
  6. 6TemucoAraucania, Chile
    1806.4×
  7. 7CuricóMaule Region, Chile
    1735.8×
  8. 8LinaresMaule Region, Chile
    1715.6×
  9. 9ValdiviaLos Ríos Region, Chile
    1705.5×
  10. 10CuranilahueBiobio, Chile
    1705.5×
  11. 11La UniónLos Ríos Region, Chile
    1685.3×
  12. 12San CarlosÑuble, Chile
    1675.2×
  13. 13Los ÁngelesBiobio, Chile
    1675.2×
  14. 14San Mateo AtencoMéxico, Mexico
    1665.1×
  15. 15TalcahuanoBiobio, Chile
    1624.7×
  16. 16CoronelBiobio, Chile
    1604.5×
  17. 17TalcaMaule Region, Chile
    1594.4×
  18. 18RengoO'Higgins Region, Chile
    1584.4×
  19. 19ChillánÑuble, Chile
    1584.4×
  20. 20CauquenesMaule Region, Chile
    1584.3×
  21. 21HualquiBiobio, Chile
    1523.8×
  22. 22RancaguaO'Higgins Region, Chile
    1523.8×
  23. 23FairbanksAlaska, United States
    1513.7×
  24. 24BadgerAlaska, United States
    1513.7×
  25. 25SantiagoSantiago Metropolitan, Chile
    1403.4×
  26. 26Puente AltoSantiago Metropolitan, Chile
    1393.4×
  27. 27Puerto MonttLos Lagos Region, Chile
    1373.3×
  28. 28JakartaJakarta, Indonesia
    1353.3×
  29. 29Lahorelow-cost sensorsPunjab, Pakistan
    1333.2×
  30. 30TalaganteSantiago Metropolitan, Chile
    1313.2×
  31. 31KigaliKigali, Rwanda
    1293.1×
  32. 32Addis AbabaAddis Ababa, Ethiopia
    1283.1×
  33. 33ToméBiobio, Chile
    1273.1×
  34. 34DushanbeDushanbe, Tajikistan
    1222.9×
  35. 35Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    1212.9×
  36. 36Dhakalow-cost sensorsDhaka Division, Bangladesh
    1202.9×
  37. 36Puerto AysénAysén, Chile
    1202.9×
  38. 38ConcepciónBiobio, Chile
    1162.8×
  39. 39ChiguayanteBiobio, Chile
    1142.7×
  40. 40San Pedro de la PazBiobio, Chile
    1132.7×
  41. 41BeijingBeijing, China
    1122.7×
  42. 41Puerto VarasLos Lagos Region, Chile
    1122.7×
  43. 43Santa Anita - Los FicusLima region, Peru
    1082.6×
  44. 44Victoria de DurangoDurango, Mexico
    1072.5×
  45. 45QuillotaValparaiso, Chile
    1052.5×
  46. 46KolkataWest Bengal, India
    1042.5×
  47. 46EdmontonAlberta, Canada
    1042.5×
  48. 48Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1032.4×
  49. 49LotaBiobio, Chile
    1022.4×
  50. 50TlaquepaqueJalisco, Mexico
    1022.4×
  51. 51ManamaManama, Bahrain
    982.3×
  52. 52MexicaliBaja California, Mexico
    962.2×
  53. 53BakuBaki, Azerbaijan
    942.2×
  54. 54Islamabadlow-cost sensorsIslamabad, Pakistan
    942.1×
  55. 55Viña del MarValparaiso, Chile
    932.1×
  56. 56Kampalalow-cost sensorsCentral Region, Uganda
    902.0×
  57. 56Şabāḩ as SālimMubārak al Kabīr, Kuwait
    902.0×
  58. 58ConcónValparaiso, Chile
    861.9×
  59. 59CalgaryAlberta, Canada
    861.8×
  60. 60ChennaiTamil Nadu, India
    851.8×
  61. 61Karachilow-cost sensorsSindh, Pakistan
    841.8×
  62. 62QuinteroValparaiso, Chile
    841.8×
  63. 63LimaLima Province, Peru
    831.8×
  64. 64Saint CloudMinnesota, United States
    821.7×
  65. 65DuluthMinnesota, United States
    811.7×
  66. 66CoquimboCoquimbo Region, Chile
    811.7×
  67. 67Collado-VillalbaMadrid, Spain
    811.7×
  68. 68XonacatlánMéxico, Mexico
    801.6×
  69. 69BurnsvilleMinnesota, United States
    791.6×
  70. 69MinneapolisMinnesota, United States
    791.6×
  71. 71ShakopeeMinnesota, United States
    791.6×
  72. 72ReginaSaskatchewan, Canada
    791.6×
  73. 73TolucaMéxico, Mexico
    781.6×
  74. 74Alcalá de HenaresMadrid, Spain
    781.6×
  75. 75PristinaPristina, Kosovo
    781.6×
  76. 75SuperiorWisconsin, United States
    781.6×
  77. 77DelhiDelhi, India
    781.6×
  78. 77BamakoBamako, Mali
    781.6×
  79. 79Saint MichaelMinnesota, United States
    781.6×
  80. 80AntananarivoAnalamanga, Madagascar
    771.5×
  81. 80AricaArica y Parinacota Region, Chile
    771.5×
  82. 80Ciudad ApodacaNuevo León, Mexico
    771.5×
  83. 83Saint PaulMinnesota, United States
    771.5×
  84. 84CranbrookBritish Columbia, Canada
    761.5×
  85. 85RochesterMinnesota, United States
    751.5×
  86. 85SaskatoonSaskatchewan, Canada
    751.5×
  87. 85Swift CurrentSaskatchewan, Canada
    751.5×
  88. 88Ciudad JuárezChihuahua, Mexico
    751.5×
  89. 89SliemaTas-Sliema, Malta
    751.5×
  90. 90Apple ValleyMinnesota, United States
    751.5×
  91. 91Red DeerAlberta, Canada
    741.4×
  92. 92AntofagastaAntofagasta, Chile
    741.4×
  93. 93Nong KhaemBangkok, Thailand
    741.4×
  94. 93ShintomiMiyazaki, Japan
    741.4×
  95. 95CelayaGuanajuato, Mexico
    731.4×
  96. 96HyderabadTelangana, India
    731.4×
  97. 96West FargoNorth Dakota, United States
    731.4×
  98. 98Villa Poeta José Gálvez BarrenecheaLima region, Peru
    731.4×
  99. 99CholulaPuebla, Mexico
    721.4×
  100. 100CopiapóAtacama, Chile
    711.3×
  101. 101SarajevoFederation of B&H, Bosnia and Herzegovina
    711.3×
  102. 102PeoriaIllinois, United States
    711.3×
  103. 103Hondomachi-hondoKumamoto, Japan
    701.3×
  104. 103AirdrieAlberta, Canada
    701.3×
  105. 105GuangzhouGuangdong, China
    701.3×
  106. 105TakanabeMiyazaki, Japan
    701.3×
  107. 105WatertownSouth Dakota, United States
    701.3×
  108. 108HanoiHanoi, Vietnam
    701.3×
  109. 109La SerenaCoquimbo Region, Chile
    691.3×
  110. 110TocopillaAntofagasta, Chile
    691.2×
  111. 111Samut SakhonSamut Sakhon, Thailand
    691.2×
  112. 111MóstolesMadrid, Spain
    691.2×
  113. 111BlaineMinnesota, United States
    691.2×
  114. 114St. AlbertAlberta, Canada
    681.2×
  115. 115Iowa CityIowa, United States
    681.2×
  116. 115HollandMichigan, United States
    681.2×
  117. 117MolineIllinois, United States
    681.2×
  118. 118Santa CatarinaNuevo León, Mexico
    681.2×
  119. 119Tepeji del Río de OcampoHidalgo, Mexico
    671.2×
  120. 119AmamiKagoshima, Japan
    671.2×
  121. 121ClintonIowa, United States
    671.2×
  122. 122San Salvador TizatlalliMéxico, Mexico
    671.2×
  123. 123DavenportIowa, United States
    671.2×
  124. 124Eau ClaireWisconsin, United States
    671.2×
  125. 125Franklin ParkIllinois, United States
    661.2×
  126. 125JolietIllinois, United States
    661.2×
  127. 127Alto HospicioTarapacá, Chile
    661.1×
  128. 127Ciudad Benito JuárezNuevo León, Mexico
    661.1×
  129. 129CacémLisbon, Portugal
    661.1×
  130. 130Abujalow-cost sensorsFCT, Nigeria
    661.1×
  131. 131WaterlooIowa, United States
    651.1×
  132. 131HonoluluHawaii, United States
    651.1×
  133. 133NairobiNairobi County, Kenya
    651.1×
  134. 134NagoOkinawa, Japan
    651.1×
  135. 134Naucalpan de JuárezMéxico, Mexico
    651.1×
  136. 134CalamaAntofagasta, Chile
    651.1×
  137. 134West MemphisArkansas, United States
    651.1×
  138. 134Calumet CityIllinois, United States
    651.1×
  139. 139León de los AldamaGuanajuato, Mexico
    641.1×
  140. 139East Saint LouisIllinois, United States
    641.1×
  141. 141Bang Bo DistrictSamut Prakan, Thailand
    641.1×
  142. 141NobeokaMiyazaki, Japan
    641.1×
  143. 143NichinanMiyazaki, Japan
    641.1×
  144. 143Fort LauderdaleFlorida, United States
    641.1×
  145. 145AnkenyIowa, United States
    641.1×
  146. 145Des PlainesIllinois, United States
    641.1×
  147. 147Wan ChaiWan Chai, Hong Kong
    631.1×
  148. 147La CrosseWisconsin, United States
    631.1×
  149. 147Greater SudburyOntario, Canada
    631.1×
  150. 150Rouyn-NorandaQuebec, Canada
    631.0×
  151. 151CuencaCastille-La Mancha, Spain
    631.0×
  152. 151NorthbrookIllinois, United States
    631.0×
  153. 151Sherwood ParkAlberta, Canada
    631.0×
  154. 154RockfordIllinois, United States
    631.0×
  155. 155AlgecirasAndalusia, Spain
    631.0×
  156. 155SpringfieldIllinois, United States
    631.0×
  157. 155NapervilleIllinois, United States
    631.0×
  158. 158IshigakiOkinawa, Japan
    631.0×
  159. 158SevillaAndalusia, Spain
    631.0×
  160. 160BloomingtonIllinois, United States
    621.0×
  161. 160LethbridgeAlberta, Canada
    621.0×
  162. 162MadisonWisconsin, United States
    621.0×
  163. 163BangkokBangkok, Thailand
    621.0×
  164. 164LisbonLisbon, Portugal
    621.0×
  165. 164DecaturIllinois, United States
    621.0×
  166. 164PortlandMaine, United States
    621.0×
  167. 164MilwaukeeWisconsin, United States
    621.0×
  168. 168NahaOkinawa, Japan
    621.0×
  169. 168HuelvaAndalusia, Spain
    621.0×
  170. 168HomesteadFlorida, United States
    621.0×
  171. 168WaukeshaWisconsin, United States
    621.0×
  172. 172La Línea de la ConcepciónAndalusia, Spain
    611.0×
  173. 172ValdemoroMadrid, Spain
    611.0×
  174. 172Granite CityIllinois, United States
    611.0×
  175. 172Thunder BayOntario, Canada
    611.0×
  176. 172Jardines de la SillaNuevo León, Mexico
    611.0×
  177. 177Khlong LuangPathum Thani, Thailand
    611.0×
  178. 177San RoqueAndalusia, Spain
    611.0×
  179. 177East ChicagoIndiana, United States
    611.0×
  180. 180MuscatineIowa, United States
    611.0×
  181. 180CaryIllinois, United States
    611.0×
  182. 182ColomboWestern Province, Sri Lanka
    611.0×
  183. 182Makakilo / Kapolei / Honokai HaleHawaii, United States
    611.0×
  184. 184MonterreyNuevo León, Mexico
    611.0×
  185. 185VigoGalicia, Spain
    610.9×
  186. 185GaryIndiana, United States
    610.9×
  187. 185PortageIndiana, United States
    610.9×
  188. 185AberdeenSouth Dakota, United States
    610.9×
  189. 185BrookingsSouth Dakota, United States
    610.9×
  190. 190MadridMadrid, Spain
    600.9×
  191. 190TijuanaBaja California, Mexico
    600.9×
  192. 190Santiago de QuerétaroQuerétaro, Mexico
    600.9×
  193. 190Des MoinesIowa, United States
    600.9×
  194. 194Phra PradaengSamut Prakan, Thailand
    600.9×
  195. 194Santa Cruz de TenerifeCanary Islands, Spain
    600.9×
  196. 196Nakhon PathomNakhon Pathom, Thailand
    600.9×
  197. 196GuanajuatoGuanajuato, Mexico
    600.9×
  198. 198Saint JosephMissouri, United States
    590.9×
  199. 198Grand RapidsMichigan, United States
    590.9×
  200. 198Great FallsMontana, United States
    590.9×

Top 200 of 1,849 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 8, 2023, smogrank.com/history/2023-08-08 (accessed 2 Oct 2026).

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