SmogRank / History / August 10, 2023

Most polluted cities on August 10, 2023

1,864 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 10, 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. 2FairbanksAlaska, United States
    1857.0×
  3. 3BadgerAlaska, United States
    1786.3×
  4. 4Dhakalow-cost sensorsDhaka Division, Bangladesh
    1766.1×
  5. 5JakartaJakarta, Indonesia
    1756.0×
  6. 6CoyhaiqueAysén, Chile
    1634.8×
  7. 7KigaliKigali, Rwanda
    1554.1×
  8. 8KolkataWest Bengal, India
    1533.9×
  9. 9Lahorelow-cost sensorsPunjab, Pakistan
    1463.6×
  10. 10Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1403.4×
  11. 11Addis AbabaAddis Ababa, Ethiopia
    1333.2×
  12. 12Puerto AysénAysén, Chile
    1293.1×
  13. 13BeijingBeijing, China
    1283.1×
  14. 14Kampalalow-cost sensorsCentral Region, Uganda
    1253.0×
  15. 15Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1192.9×
  16. 16RancaguaO'Higgins Region, Chile
    1172.8×
  17. 17RengoO'Higgins Region, Chile
    1112.6×
  18. 18CuencaCastille-La Mancha, Spain
    1102.6×
  19. 19N'DjamenaN’Djaména, Chad
    1082.6×
  20. 20NacimientoBiobio, Chile
    1072.5×
  21. 21SantiagoSantiago Metropolitan, Chile
    1062.5×
  22. 22ManamaManama, Bahrain
    1022.4×
  23. 23Puente AltoSantiago Metropolitan, Chile
    1022.4×
  24. 24CuricóMaule Region, Chile
    972.3×
  25. 25LinaresMaule Region, Chile
    962.2×
  26. 26TalaganteSantiago Metropolitan, Chile
    962.2×
  27. 27HanoiHanoi, Vietnam
    952.2×
  28. 28MexicaliBaja California, Mexico
    942.1×
  29. 29DushanbeDushanbe, Tajikistan
    942.1×
  30. 29DelhiDelhi, India
    942.1×
  31. 31OsornoLos Lagos Region, Chile
    932.1×
  32. 32HyderabadTelangana, India
    932.1×
  33. 33La UniónLos Ríos Region, Chile
    922.1×
  34. 34Islamabadlow-cost sensorsIslamabad, Pakistan
    922.1×
  35. 34TlaquepaqueJalisco, Mexico
    922.1×
  36. 36ValdiviaLos Ríos Region, Chile
    902.0×
  37. 37CuranilahueBiobio, Chile
    902.0×
  38. 38XonacatlánMéxico, Mexico
    902.0×
  39. 39QuillotaValparaiso, Chile
    881.9×
  40. 40Santa Anita - Los FicusLima region, Peru
    881.9×
  41. 41NairobiNairobi County, Kenya
    881.9×
  42. 42ChennaiTamil Nadu, India
    871.9×
  43. 43TolucaMéxico, Mexico
    861.9×
  44. 44Puerto VarasLos Lagos Region, Chile
    861.8×
  45. 44CauquenesMaule Region, Chile
    861.8×
  46. 46Viña del MarValparaiso, Chile
    851.8×
  47. 47CoquimboCoquimbo Region, Chile
    851.8×
  48. 48GuangzhouGuangdong, China
    831.8×
  49. 48ChillánÑuble, Chile
    831.8×
  50. 50BakuBaki, Azerbaijan
    821.7×
  51. 50SarajevoFederation of B&H, Bosnia and Herzegovina
    821.7×
  52. 52TemucoAraucania, Chile
    821.7×
  53. 53San CarlosÑuble, Chile
    811.7×
  54. 54Ciudad ApodacaNuevo León, Mexico
    811.7×
  55. 55Puerto MonttLos Lagos Region, Chile
    811.7×
  56. 56CoronelBiobio, Chile
    801.6×
  57. 57HualquiBiobio, Chile
    791.6×
  58. 58Los ÁngelesBiobio, Chile
    781.6×
  59. 59Alcalá de HenaresMadrid, Spain
    781.6×
  60. 60Santa CatarinaNuevo León, Mexico
    771.5×
  61. 61CopiapóAtacama, Chile
    761.5×
  62. 62PristinaPristina, Kosovo
    761.5×
  63. 62Lexingtonlow-cost sensorsMassachusetts, United States
    761.5×
  64. 64Karachilow-cost sensorsSindh, Pakistan
    761.5×
  65. 64San Salvador TizatlalliMéxico, Mexico
    761.5×
  66. 66RedmondOregon, United States
    751.5×
  67. 67HollandMichigan, United States
    751.5×
  68. 68BendOregon, United States
    751.5×
  69. 69TalcaMaule Region, Chile
    751.5×
  70. 70Nong KhaemBangkok, Thailand
    751.5×
  71. 70QuinteroValparaiso, Chile
    751.5×
  72. 72AlgecirasAndalusia, Spain
    741.4×
  73. 72Victoria de DurangoDurango, Mexico
    741.4×
  74. 74AntofagastaAntofagasta, Chile
    741.4×
  75. 75Ciudad Benito JuárezNuevo León, Mexico
    741.4×
  76. 76Wan ChaiWan Chai, Hong Kong
    731.4×
  77. 76LimaLima Province, Peru
    731.4×
  78. 78ConcónValparaiso, Chile
    731.4×
  79. 79AntananarivoAnalamanga, Madagascar
    721.4×
  80. 80PortlandMaine, United States
    721.3×
  81. 81AlgeteMadrid, Spain
    711.3×
  82. 82Naucalpan de JuárezMéxico, Mexico
    711.3×
  83. 82La SerenaCoquimbo Region, Chile
    711.3×
  84. 82NorthbrookIllinois, United States
    711.3×
  85. 85VeracruzVeracruz, Mexico
    701.3×
  86. 86LondonOntario, Canada
    701.3×
  87. 87BamakoBamako, Mali
    701.3×
  88. 88AshgabatAshgabat, Turkmenistan
    701.3×
  89. 88Granadilla de AbonaCanary Islands, Spain
    701.3×
  90. 88San Andrés TuxtlaVeracruz, Mexico
    701.3×
  91. 88Franklin ParkIllinois, United States
    701.3×
  92. 92CelayaGuanajuato, Mexico
    691.3×
  93. 92KalamazooMichigan, United States
    691.3×
  94. 94ValdemoroMadrid, Spain
    691.3×
  95. 94DetroitMichigan, United States
    691.3×
  96. 96MilwaukeeWisconsin, United States
    691.2×
  97. 97Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    681.2×
  98. 97South BendIndiana, United States
    681.2×
  99. 99TalcahuanoBiobio, Chile
    681.2×
  100. 99Grand RapidsMichigan, United States
    681.2×
  101. 101FujinomiyaShizuoka, Japan
    671.2×
  102. 101San RoqueAndalusia, Spain
    671.2×
  103. 101Des PlainesIllinois, United States
    671.2×
  104. 101SarniaOntario, Canada
    671.2×
  105. 105AgüimesCanary Islands, Spain
    671.2×
  106. 105MonterreyNuevo León, Mexico
    671.2×
  107. 105DearbornMichigan, United States
    671.2×
  108. 108ArrecifeCanary Islands, Spain
    671.2×
  109. 108Gasteiz / VitoriaBasque Country, Spain
    671.2×
  110. 108Port HuronMichigan, United States
    671.2×
  111. 108Spanish ForkUtah, United States
    671.2×
  112. 112São PauloSão Paulo, Brazil
    671.2×
  113. 112ToméBiobio, Chile
    671.2×
  114. 112Calumet CityIllinois, United States
    671.2×
  115. 112Jardines de la SillaNuevo León, Mexico
    671.2×
  116. 116SalorTashkent Region, Uzbekistan
    661.2×
  117. 116Tepeji del Río de OcampoHidalgo, Mexico
    661.2×
  118. 116OakvilleOntario, Canada
    661.2×
  119. 119JenisonMichigan, United States
    661.1×
  120. 119WaukeshaWisconsin, United States
    661.1×
  121. 121Lincoln ParkMichigan, United States
    661.1×
  122. 122ColomboWestern Province, Sri Lanka
    661.1×
  123. 123TakasakiGunma, Japan
    661.1×
  124. 124DębicaSubcarpathia, Poland
    651.1×
  125. 124Phra PradaengSamut Prakan, Thailand
    651.1×
  126. 124Collado-VillalbaMadrid, Spain
    651.1×
  127. 124MiltonOntario, Canada
    651.1×
  128. 128LotaBiobio, Chile
    651.1×
  129. 128CalamaAntofagasta, Chile
    651.1×
  130. 128CalexicoCalifornia, United States
    651.1×
  131. 131TocopillaAntofagasta, Chile
    651.1×
  132. 132ElizabethNew Jersey, United States
    651.1×
  133. 132South MilwaukeeWisconsin, United States
    651.1×
  134. 132KitchenerOntario, Canada
    651.1×
  135. 135CaryIllinois, United States
    651.1×
  136. 136Bang Bo DistrictSamut Prakan, Thailand
    641.1×
  137. 136MadisonWisconsin, United States
    641.1×
  138. 136St. ThomasOntario, Canada
    641.1×
  139. 139BangkokBangkok, Thailand
    641.1×
  140. 139AlgiersAlgiers, Algeria
    641.1×
  141. 139les EscaldesEscaldes-Engordany, Andorra
    641.1×
  142. 142YpsilantiMichigan, United States
    641.1×
  143. 143GuanajuatoGuanajuato, Mexico
    641.1×
  144. 143GuelphOntario, Canada
    641.1×
  145. 143NewmarketOntario, Canada
    641.1×
  146. 146ChathamOntario, Canada
    641.1×
  147. 147San Luis de la PazGuanajuato, Mexico
    631.1×
  148. 147Ciudad JuárezChihuahua, Mexico
    631.1×
  149. 147BrantfordOntario, Canada
    631.1×
  150. 147WaterdownOntario, Canada
    631.1×
  151. 151ChiguayanteBiobio, Chile
    631.0×
  152. 151Fort LauderdaleFlorida, United States
    631.0×
  153. 151RochesterMinnesota, United States
    631.0×
  154. 151TorontoOntario, Canada
    631.0×
  155. 155TaylorMichigan, United States
    631.0×
  156. 156WaterburyConnecticut, United States
    631.0×
  157. 156ZionIllinois, United States
    631.0×
  158. 158NagoOkinawa, Japan
    631.0×
  159. 158Ulu BedokSingapore
    631.0×
  160. 158Ang Mo Kio New TownSingapore
    631.0×
  161. 158HamiltonOntario, Canada
    631.0×
  162. 162TrentonNew Jersey, United States
    631.0×
  163. 163East ChicagoIndiana, United States
    621.0×
  164. 163BramptonOntario, Canada
    621.0×
  165. 163San Francisco De BorjaLima region, Peru
    621.0×
  166. 166TakanabeMiyazaki, Japan
    621.0×
  167. 166SalamancaGuanajuato, Mexico
    621.0×
  168. 166ClevelandOhio, United States
    621.0×
  169. 169SliemaTas-Sliema, Malta
    621.0×
  170. 169LansingMichigan, United States
    621.0×
  171. 171RockfordIllinois, United States
    621.0×
  172. 171GaryIndiana, United States
    621.0×
  173. 173LitvínovÚstí nad Labem Region, Czechia
    611.0×
  174. 173Laudio / LlodioBasque Country, Spain
    611.0×
  175. 173NapervilleIllinois, United States
    611.0×
  176. 176NobeokaMiyazaki, Japan
    611.0×
  177. 176Cadereyta JiménezNuevo León, Mexico
    611.0×
  178. 176BensalemPennsylvania, United States
    611.0×
  179. 176PawtucketRhode Island, United States
    611.0×
  180. 180Falconara MarittimaThe Marches, Italy
    611.0×
  181. 180PeterboroughOntario, Canada
    611.0×
  182. 182WarrenOhio, United States
    611.0×
  183. 183Pachuca de SotoHidalgo, Mexico
    611.0×
  184. 183ConcepciónBiobio, Chile
    611.0×
  185. 183HammondIndiana, United States
    611.0×
  186. 186JeddahMecca Region, Saudi Arabia
    600.9×
  187. 186KushikinoKagoshima, Japan
    600.9×
  188. 186KochiKochi, Japan
    600.9×
  189. 189Bang KapiBangkok, Thailand
    600.9×
  190. 189Tuen MunTuen Mun, Hong Kong
    600.9×
  191. 189Lagoslow-cost sensorsLagos, Nigeria
    600.9×
  192. 189HartfordConnecticut, United States
    600.9×
  193. 189PeoriaIllinois, United States
    600.9×
  194. 189BarrieOntario, Canada
    600.9×
  195. 195Khlong LuangPathum Thani, Thailand
    600.9×
  196. 195IshigakiOkinawa, Japan
    600.9×
  197. 195Ciudad NezahualcoyotlMéxico, Mexico
    600.9×
  198. 195JolietIllinois, United States
    600.9×
  199. 195Shaker HeightsOhio, United States
    600.9×
  200. 200OkinawaOkinawa, Japan
    600.9×

Top 200 of 1,864 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 10, 2023, smogrank.com/history/2023-08-10 (accessed 2 Oct 2026).

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