SmogRank / History / August 30, 2023

Most polluted cities on August 30, 2023

1,837 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.

Bad-air episodes during August 30, 2023. All episodes.

← Piedras Negras 986.0 µg/m³ 900 µg/m³15 WHO 24-hour guideline
Every city ranked for August 30, 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. 2Dhakalow-cost sensorsDhaka Division, Bangladesh
    1988.2×
  3. 3Grande PrairieAlberta, Canada
    1846.8×
  4. 4KolkataWest Bengal, India
    1685.3×
  5. 5Fort St. JohnBritish Columbia, Canada
    1614.7×
  6. 6Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1584.3×
  7. 7ReginaSaskatchewan, Canada
    1544.0×
  8. 8SaskatoonSaskatchewan, Canada
    1513.7×
  9. 9Lahorelow-cost sensorsPunjab, Pakistan
    1483.6×
  10. 10Puerto VarasLos Lagos Region, Chile
    1463.6×
  11. 11Prince AlbertSaskatchewan, Canada
    1433.5×
  12. 12Grants PassOregon, United States
    1373.3×
  13. 13La UniónLos Ríos Region, Chile
    1353.3×
  14. 14KigaliKigali, Rwanda
    1343.2×
  15. 15UkiahCalifornia, United States
    1303.1×
  16. 16EdmontonAlberta, Canada
    1293.1×
  17. 17Victoria de DurangoDurango, Mexico
    1293.1×
  18. 18AlexandriaAlexandria, Egypt
    1283.1×
  19. 19HyderabadTelangana, India
    1142.7×
  20. 20Fort McMurrayAlberta, Canada
    1132.7×
  21. 21RoseburgOregon, United States
    1122.7×
  22. 22Addis AbabaAddis Ababa, Ethiopia
    1112.6×
  23. 23DelhiDelhi, India
    1092.6×
  24. 24Kampalalow-cost sensorsCentral Region, Uganda
    1092.6×
  25. 25Islamabadlow-cost sensorsIslamabad, Pakistan
    1072.5×
  26. 26MexicaliBaja California, Mexico
    1032.4×
  27. 27CuranilahueBiobio, Chile
    1002.4×
  28. 28SacramentoCalifornia, United States
    1002.4×
  29. 28WoodlandCalifornia, United States
    1002.4×
  30. 30Puerto MonttLos Lagos Region, Chile
    992.3×
  31. 31West FargoNorth Dakota, United States
    992.3×
  32. 32NacimientoBiobio, Chile
    992.3×
  33. 33CoyhaiqueAysén, Chile
    982.3×
  34. 34ModestoCalifornia, United States
    972.3×
  35. 35TurlockCalifornia, United States
    972.2×
  36. 36NairobiNairobi County, Kenya
    962.2×
  37. 37StocktonCalifornia, United States
    962.2×
  38. 38MantecaCalifornia, United States
    952.2×
  39. 39AshlandOregon, United States
    952.2×
  40. 40Puerto AysénAysén, Chile
    932.1×
  41. 41LimaLima Province, Peru
    932.1×
  42. 42MedfordOregon, United States
    932.1×
  43. 43GaltCalifornia, United States
    922.1×
  44. 44MercedCalifornia, United States
    922.1×
  45. 45Sioux FallsSouth Dakota, United States
    912.1×
  46. 45Yuba CityCalifornia, United States
    912.1×
  47. 47Şabāḩ as SālimMubārak al Kabīr, Kuwait
    902.0×
  48. 48WatertownSouth Dakota, United States
    902.0×
  49. 49MillcreekUtah, United States
    881.9×
  50. 50BendOregon, United States
    881.9×
  51. 50HerrimanUtah, United States
    881.9×
  52. 52PristinaPristina, Kosovo
    881.9×
  53. 53TracyCalifornia, United States
    871.9×
  54. 54ValdiviaLos Ríos Region, Chile
    871.9×
  55. 55CártamaAndalusia, Spain
    871.9×
  56. 55Santa Anita - Los FicusLima region, Peru
    871.9×
  57. 57ChennaiTamil Nadu, India
    871.9×
  58. 58West JordanUtah, United States
    871.9×
  59. 59BrookingsSouth Dakota, United States
    861.9×
  60. 60RedmondOregon, United States
    861.8×
  61. 61XonacatlánMéxico, Mexico
    851.8×
  62. 62TooeleUtah, United States
    851.8×
  63. 62Red DeerAlberta, Canada
    851.8×
  64. 64LibertyMissouri, United States
    851.8×
  65. 65San CarlosÑuble, Chile
    851.8×
  66. 66CoquimboCoquimbo Region, Chile
    841.8×
  67. 67AberdeenSouth Dakota, United States
    841.8×
  68. 67MagnaUtah, United States
    841.8×
  69. 69Santa RosaCalifornia, United States
    841.8×
  70. 70Grand IslandNebraska, United States
    831.8×
  71. 70San JoseCalifornia, United States
    831.8×
  72. 72TolucaMéxico, Mexico
    831.8×
  73. 73Arden-ArcadeCalifornia, United States
    831.8×
  74. 74WichitaKansas, United States
    831.7×
  75. 75Kathmandulow-cost sensorsBagmati Province, Nepal
    821.7×
  76. 75HanoiHanoi, Vietnam
    821.7×
  77. 77DerbyKansas, United States
    821.7×
  78. 78HualquiBiobio, Chile
    821.7×
  79. 79MaderaCalifornia, United States
    821.7×
  80. 80OaklandCalifornia, United States
    821.7×
  81. 81AntofagastaAntofagasta, Chile
    811.7×
  82. 81Salt Lake CityUtah, United States
    811.7×
  83. 83BakuBaki, Azerbaijan
    811.7×
  84. 84TocopillaAntofagasta, Chile
    811.7×
  85. 84CalgaryAlberta, Canada
    811.7×
  86. 86N'DjamenaN’Djaména, Chad
    801.7×
  87. 86San Francisco TlalcilalcalpanMéxico, Mexico
    801.7×
  88. 86CoronelBiobio, Chile
    801.7×
  89. 89CuernavacaMorelos, Mexico
    801.6×
  90. 89RichmondCalifornia, United States
    801.6×
  91. 91BountifulUtah, United States
    791.6×
  92. 92ChillánÑuble, Chile
    791.6×
  93. 93Spanish ForkUtah, United States
    791.6×
  94. 94Samut SakhonSamut Sakhon, Thailand
    781.6×
  95. 94TijuanaBaja California, Mexico
    781.6×
  96. 94St. AlbertAlberta, Canada
    781.6×
  97. 97SantiagoSantiago Metropolitan, Chile
    781.6×
  98. 97Redwood CityCalifornia, United States
    781.6×
  99. 99Puente AltoSantiago Metropolitan, Chile
    781.6×
  100. 100TalaganteSantiago Metropolitan, Chile
    771.6×
  101. 100RancaguaO'Higgins Region, Chile
    771.6×
  102. 100QuinteroValparaiso, Chile
    771.6×
  103. 103CopiapóAtacama, Chile
    771.5×
  104. 104CauquenesMaule Region, Chile
    771.5×
  105. 105San Salvador TizatlalliMéxico, Mexico
    771.5×
  106. 106ZapopanJalisco, Mexico
    761.5×
  107. 106TopekaKansas, United States
    761.5×
  108. 106ShreveportLouisiana, United States
    761.5×
  109. 109Ciudad Benito JuárezNuevo León, Mexico
    761.5×
  110. 110ŚwinoujścieWest Pomerania, Poland
    761.5×
  111. 110San LeandroCalifornia, United States
    761.5×
  112. 110San RafaelCalifornia, United States
    761.5×
  113. 113Ponca CityOklahoma, United States
    761.5×
  114. 114ComptonCalifornia, United States
    761.5×
  115. 115ShenyangLiaoning, China
    751.5×
  116. 116ToméBiobio, Chile
    751.5×
  117. 117GuangzhouGuangdong, China
    751.5×
  118. 117TemucoAraucania, Chile
    751.5×
  119. 117HanfordCalifornia, United States
    751.5×
  120. 117ReddingCalifornia, United States
    751.5×
  121. 121Ciudad NezahualcoyotlMéxico, Mexico
    751.5×
  122. 121Los ÁngelesBiobio, Chile
    751.5×
  123. 121JenksOklahoma, United States
    751.5×
  124. 124Karachilow-cost sensorsSindh, Pakistan
    741.4×
  125. 124CuricóMaule Region, Chile
    741.4×
  126. 124SalinasCalifornia, United States
    741.4×
  127. 127Ulu BedokSingapore
    741.4×
  128. 128CorcoranCalifornia, United States
    741.4×
  129. 129DushanbeDushanbe, Tajikistan
    741.4×
  130. 129TalcaMaule Region, Chile
    741.4×
  131. 129OmahaNebraska, United States
    741.4×
  132. 132TalcahuanoBiobio, Chile
    741.4×
  133. 133VernonBritish Columbia, Canada
    731.4×
  134. 134Villa Poeta José Gálvez BarrenecheaLima region, Peru
    731.4×
  135. 134LincolnCalifornia, United States
    731.4×
  136. 134Swift CurrentSaskatchewan, Canada
    731.4×
  137. 137LivermoreCalifornia, United States
    731.4×
  138. 137Sherwood ParkAlberta, Canada
    731.4×
  139. 139OlatheKansas, United States
    721.4×
  140. 140Shakaskraallow-cost sensorsKwaZulu-Natal, South Africa
    721.4×
  141. 140SalorTashkent Region, Uzbekistan
    721.4×
  142. 140Nong KhaemBangkok, Thailand
    721.4×
  143. 140La SerenaCoquimbo Region, Chile
    721.4×
  144. 140AnkenyIowa, United States
    721.4×
  145. 140FresnoCalifornia, United States
    721.4×
  146. 146QuillotaValparaiso, Chile
    721.4×
  147. 147TulsaOklahoma, United States
    721.3×
  148. 147LincolnNebraska, United States
    721.3×
  149. 149Wan ChaiWan Chai, Hong Kong
    711.3×
  150. 149ChicoCalifornia, United States
    711.3×
  151. 149North OgdenUtah, United States
    711.3×
  152. 152ConcordCalifornia, United States
    711.3×
  153. 153AnaheimCalifornia, United States
    711.3×
  154. 154CholulaPuebla, Mexico
    701.3×
  155. 154Kansas CityKansas, United States
    701.3×
  156. 154Los AngelesCalifornia, United States
    701.3×
  157. 157Ang Mo Kio New TownSingapore
    701.3×
  158. 157MooreOklahoma, United States
    701.3×
  159. 159HernandoMississippi, United States
    691.3×
  160. 160ConcónValparaiso, Chile
    691.3×
  161. 160OremUtah, United States
    691.3×
  162. 162BellevueNebraska, United States
    691.2×
  163. 162KamloopsBritish Columbia, Canada
    691.2×
  164. 164BakersfieldCalifornia, United States
    691.2×
  165. 165EdmondOklahoma, United States
    681.2×
  166. 166Des MoinesIowa, United States
    681.2×
  167. 166RosevilleCalifornia, United States
    681.2×
  168. 168Tuen MunTuen Mun, Hong Kong
    681.2×
  169. 168HollisterCalifornia, United States
    681.2×
  170. 168Santa CruzCalifornia, United States
    681.2×
  171. 168VacavilleCalifornia, United States
    681.2×
  172. 168Spanish SpringsNevada, United States
    681.2×
  173. 173ChiguayanteBiobio, Chile
    671.2×
  174. 173Little RockArkansas, United States
    671.2×
  175. 175AirdrieAlberta, Canada
    671.2×
  176. 176NagaiYamagata, Japan
    671.2×
  177. 176CondaIdaho, United States
    671.2×
  178. 178RiversideCalifornia, United States
    671.2×
  179. 178RexburgIdaho, United States
    671.2×
  180. 180GuadalajaraJalisco, Mexico
    671.2×
  181. 180Oklahoma CityOklahoma, United States
    671.2×
  182. 182LotaBiobio, Chile
    661.2×
  183. 182Alto HospicioTarapacá, Chile
    661.2×
  184. 182SpringdaleArkansas, United States
    661.2×
  185. 185Jurupa ValleyCalifornia, United States
    661.1×
  186. 186DentonTexas, United States
    661.1×
  187. 186CalexicoCalifornia, United States
    661.1×
  188. 186ClovisCalifornia, United States
    661.1×
  189. 186San Pedro de la PazBiobio, Chile
    661.1×
  190. 190Naucalpan de JuárezMéxico, Mexico
    661.1×
  191. 190BurbankCalifornia, United States
    661.1×
  192. 190FontanaCalifornia, United States
    661.1×
  193. 190PortervilleCalifornia, United States
    661.1×
  194. 194CelayaGuanajuato, Mexico
    651.1×
  195. 194Santa BarbaraCalifornia, United States
    651.1×
  196. 196TakasakiGunma, Japan
    651.1×
  197. 196Queenstown Estatelow-cost sensorsSingapore
    651.1×
  198. 196RengoO'Higgins Region, Chile
    651.1×
  199. 199ThessaloníkiCentral Macedonia, Greece
    651.1×
  200. 199GilroyCalifornia, United States
    651.1×

Top 200 of 1,837 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 30, 2023, smogrank.com/history/2023-08-30 (accessed 2 Oct 2026).

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