SmogRank / History / August 1, 2023

Most polluted cities on August 1, 2023

1,850 cities ranked by their average PM2.5 over the day; the worst was Kamloops, Canada, at 55.7 µg/m³. Each city's own local calendar day.

← Kamloops 55.7 µg/m³ 50 µg/m³15 WHO 24-hour guideline0
Every city ranked for August 1, 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. 1KamloopsBritish Columbia, Canada
    1513.7×
  2. 2CoyhaiqueAysén, Chile
    1413.4×
  3. 3SantiagoSantiago Metropolitan, Chile
    1373.3×
  4. 4QuillotaValparaiso, Chile
    1353.3×
  5. 5LinaresMaule Region, Chile
    1323.2×
  6. 6DushanbeDushanbe, Tajikistan
    1212.9×
  7. 7Puente AltoSantiago Metropolitan, Chile
    1192.9×
  8. 8Lahorelow-cost sensorsPunjab, Pakistan
    1162.8×
  9. 9Dhakalow-cost sensorsDhaka Division, Bangladesh
    1162.8×
  10. 10RengoO'Higgins Region, Chile
    1102.6×
  11. 11RancaguaO'Higgins Region, Chile
    1082.5×
  12. 12JakartaJakarta, Indonesia
    1072.5×
  13. 13MexicaliBaja California, Mexico
    1072.5×
  14. 14Addis AbabaAddis Ababa, Ethiopia
    1062.5×
  15. 15TalaganteSantiago Metropolitan, Chile
    1062.5×
  16. 16Santa Anita - Los FicusLima region, Peru
    1012.4×
  17. 17Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    992.3×
  18. 18Puerto MonttLos Lagos Region, Chile
    982.3×
  19. 19CuranilahueBiobio, Chile
    972.3×
  20. 20PristinaPristina, Kosovo
    962.2×
  21. 20NacimientoBiobio, Chile
    962.2×
  22. 22La UniónLos Ríos Region, Chile
    962.2×
  23. 23Fort McMurrayAlberta, Canada
    952.2×
  24. 24Puerto VarasLos Lagos Region, Chile
    902.0×
  25. 24Puerto AysénAysén, Chile
    902.0×
  26. 26ManamaManama, Bahrain
    892.0×
  27. 27CoronelBiobio, Chile
    892.0×
  28. 28TalcaMaule Region, Chile
    881.9×
  29. 29CuricóMaule Region, Chile
    871.9×
  30. 29CoquimboCoquimbo Region, Chile
    871.9×
  31. 31ChennaiTamil Nadu, India
    861.9×
  32. 32AntananarivoAnalamanga, Madagascar
    861.9×
  33. 33Islamabadlow-cost sensorsIslamabad, Pakistan
    851.8×
  34. 34Şabāḩ as SālimMubārak al Kabīr, Kuwait
    841.8×
  35. 35AntofagastaAntofagasta, Chile
    831.8×
  36. 36Fort St. JohnBritish Columbia, Canada
    831.7×
  37. 37QuinteroValparaiso, Chile
    831.7×
  38. 38San CarlosÑuble, Chile
    821.7×
  39. 39ConcónValparaiso, Chile
    821.7×
  40. 40Viña del MarValparaiso, Chile
    821.7×
  41. 40HualquiBiobio, Chile
    821.7×
  42. 42Karachilow-cost sensorsSindh, Pakistan
    811.7×
  43. 42BeijingBeijing, China
    811.7×
  44. 44HanoiHanoi, Vietnam
    801.7×
  45. 45ChillánÑuble, Chile
    801.6×
  46. 45CauquenesMaule Region, Chile
    801.6×
  47. 47Great FallsMontana, United States
    801.6×
  48. 48OsornoLos Lagos Region, Chile
    801.6×
  49. 49HelenaMontana, United States
    791.6×
  50. 50LublinLublin, Poland
    791.6×
  51. 50LimaLima Province, Peru
    791.6×
  52. 52PentictonBritish Columbia, Canada
    781.6×
  53. 53ShenyangLiaoning, China
    781.6×
  54. 54IndioCalifornia, United States
    771.6×
  55. 55CantonOhio, United States
    771.5×
  56. 56São PauloSão Paulo, Brazil
    771.5×
  57. 57TlaquepaqueJalisco, Mexico
    761.5×
  58. 58ValdiviaLos Ríos Region, Chile
    761.5×
  59. 59TemucoAraucania, Chile
    751.5×
  60. 60TalcahuanoBiobio, Chile
    751.5×
  61. 61La SerenaCoquimbo Region, Chile
    751.5×
  62. 62SarajevoFederation of B&H, Bosnia and Herzegovina
    741.4×
  63. 63TocopillaAntofagasta, Chile
    741.4×
  64. 64San Francisco TlalcilalcalpanMéxico, Mexico
    721.4×
  65. 65GuangzhouGuangdong, China
    721.4×
  66. 66CopiapóAtacama, Chile
    721.3×
  67. 66EdmontonAlberta, Canada
    721.3×
  68. 68KolkataWest Bengal, India
    711.3×
  69. 68AricaArica y Parinacota Region, Chile
    711.3×
  70. 68Ciudad ApodacaNuevo León, Mexico
    711.3×
  71. 71BakuBaki, Azerbaijan
    711.3×
  72. 71LotaBiobio, Chile
    711.3×
  73. 73XonacatlánMéxico, Mexico
    711.3×
  74. 73Alto HospicioTarapacá, Chile
    711.3×
  75. 75ToméBiobio, Chile
    701.3×
  76. 75CalamaAntofagasta, Chile
    701.3×
  77. 75Ciudad JuárezChihuahua, Mexico
    701.3×
  78. 75Los AngelesCalifornia, United States
    701.3×
  79. 79TolucaMéxico, Mexico
    691.3×
  80. 79ButteMontana, United States
    691.3×
  81. 81DuluthMinnesota, United States
    691.3×
  82. 82IyoEhime, Japan
    691.3×
  83. 83Los ÁngelesBiobio, Chile
    691.2×
  84. 84BamakoBamako, Mali
    681.2×
  85. 85ChiguayanteBiobio, Chile
    681.2×
  86. 86LansingMichigan, United States
    681.2×
  87. 87DallasTexas, United States
    671.2×
  88. 88SpringdaleArkansas, United States
    671.2×
  89. 89JeddahMecca Region, Saudi Arabia
    671.2×
  90. 89AlgecirasAndalusia, Spain
    671.2×
  91. 91MooreOklahoma, United States
    671.2×
  92. 92TulsaOklahoma, United States
    661.2×
  93. 93Villa Poeta José Gálvez BarrenecheaLima region, Peru
    661.1×
  94. 93BrawleyCalifornia, United States
    661.1×
  95. 93San Salvador TizatlalliMéxico, Mexico
    661.1×
  96. 96Wan ChaiWan Chai, Hong Kong
    661.1×
  97. 97SliemaTas-Sliema, Malta
    661.1×
  98. 97Oklahoma CityOklahoma, United States
    661.1×
  99. 97ComptonCalifornia, United States
    661.1×
  100. 100SalorTashkent Region, Uzbekistan
    651.1×
  101. 101Bang Bo DistrictSamut Prakan, Thailand
    651.1×
  102. 101MinneapolisMinnesota, United States
    651.1×
  103. 101BendOregon, United States
    651.1×
  104. 104Ponca CityOklahoma, United States
    651.1×
  105. 104YpsilantiMichigan, United States
    651.1×
  106. 106DentonTexas, United States
    651.1×
  107. 107AsprópyrgosAttica, Greece
    641.1×
  108. 108EdmondOklahoma, United States
    641.1×
  109. 109TaylorMichigan, United States
    631.1×
  110. 109West MifflinPennsylvania, United States
    631.1×
  111. 109CalexicoCalifornia, United States
    631.1×
  112. 109BozemanMontana, United States
    631.1×
  113. 113ClevelandOhio, United States
    631.0×
  114. 114BitolaBitola, North Macedonia
    631.0×
  115. 114Phra PradaengSamut Prakan, Thailand
    631.0×
  116. 114Nong KhaemBangkok, Thailand
    631.0×
  117. 114DearbornMichigan, United States
    631.0×
  118. 114Lincoln ParkMichigan, United States
    631.0×
  119. 114TurlockCalifornia, United States
    631.0×
  120. 120Baton RougeLouisiana, United States
    631.0×
  121. 121KalamazooMichigan, United States
    631.0×
  122. 121WarrenOhio, United States
    631.0×
  123. 121Red DeerAlberta, Canada
    631.0×
  124. 124Santa CatarinaNuevo León, Mexico
    621.0×
  125. 125AkronOhio, United States
    621.0×
  126. 126AltamontOregon, United States
    621.0×
  127. 127AstanaAstana, Kazakhstan
    621.0×
  128. 127San Mateo AtencoMéxico, Mexico
    621.0×
  129. 127Fort WorthTexas, United States
    621.0×
  130. 130Thousand OaksCalifornia, United States
    621.0×
  131. 130San Francisco De BorjaLima region, Peru
    621.0×
  132. 132MálagaAndalusia, Spain
    611.0×
  133. 132WindsorOntario, Canada
    611.0×
  134. 134AdaOklahoma, United States
    611.0×
  135. 134HollandMichigan, United States
    611.0×
  136. 136Collado-VillalbaMadrid, Spain
    611.0×
  137. 136BaytownTexas, United States
    611.0×
  138. 138SulphurLouisiana, United States
    611.0×
  139. 139Santa Cruz de TenerifeCanary Islands, Spain
    611.0×
  140. 139JenksOklahoma, United States
    611.0×
  141. 139Yuba CityCalifornia, United States
    611.0×
  142. 142McAlesterOklahoma, United States
    610.9×
  143. 143CuencaCastille-La Mancha, Spain
    600.9×
  144. 144NagaiYamagata, Japan
    600.9×
  145. 144DetroitMichigan, United States
    600.9×
  146. 144PittsburghPennsylvania, United States
    600.9×
  147. 144BurbankCalifornia, United States
    600.9×
  148. 148ConcepciónBiobio, Chile
    600.9×
  149. 148West MemphisArkansas, United States
    600.9×
  150. 148SteubenvilleOhio, United States
    600.9×
  151. 148ModestoCalifornia, United States
    600.9×
  152. 148JōetsuNiigata, Japan
    600.9×
  153. 153Nakhon PathomNakhon Pathom, Thailand
    600.9×
  154. 153YoungstownOhio, United States
    600.9×
  155. 153Thunder BayOntario, Canada
    600.9×
  156. 156RedfordMichigan, United States
    600.9×
  157. 157NorwoodOhio, United States
    590.9×
  158. 157Hawthornelow-cost sensorsCalifornia, United States
    590.9×
  159. 157AmamiKagoshima, Japan
    590.9×
  160. 160Haskovolow-cost sensorsHaskovo, Bulgaria
    590.9×
  161. 160NiihamaEhime, Japan
    590.9×
  162. 160Ulu BedokSingapore
    590.9×
  163. 160Alcalá de HenaresMadrid, Spain
    590.9×
  164. 160New OrleansLouisiana, United States
    590.9×
  165. 160Carsonlow-cost sensorsCalifornia, United States
    590.9×
  166. 166BangkokBangkok, Thailand
    590.9×
  167. 166Khlong LuangPathum Thani, Thailand
    590.9×
  168. 166MiddletownOhio, United States
    590.9×
  169. 166Torrancelow-cost sensorsCalifornia, United States
    590.9×
  170. 170MatsuyamaEhime, Japan
    590.9×
  171. 170Santa BarbaraCalifornia, United States
    590.9×
  172. 172ToyamaToyama, Japan
    590.9×
  173. 172OkayaNagano, Japan
    590.9×
  174. 172KiryūGunma, Japan
    590.9×
  175. 172MasonOhio, United States
    590.9×
  176. 176Las Palmas de Gran CanariaCanary Islands, Spain
    580.9×
  177. 176WestervilleOhio, United States
    580.9×
  178. 178Sham Shui PoSham Shui Po District, Hong Kong
    580.9×
  179. 178CardiffWales, United Kingdom
    580.9×
  180. 178SalamancaGuanajuato, Mexico
    580.9×
  181. 178ShreveportLouisiana, United States
    580.9×
  182. 178DaytonOhio, United States
    580.9×
  183. 178LawtonOklahoma, United States
    580.9×
  184. 178FillmoreCalifornia, United States
    580.9×
  185. 185TetovoTetovo, North Macedonia
    580.9×
  186. 185AnaheimCalifornia, United States
    580.9×
  187. 185El CentroCalifornia, United States
    580.9×
  188. 185AshlandOregon, United States
    580.9×
  189. 189AlgiersAlgiers, Algeria
    580.9×
  190. 189La Línea de la ConcepciónAndalusia, Spain
    580.9×
  191. 189McDonoughGeorgia, United States
    580.9×
  192. 189CincinnatiOhio, United States
    580.9×
  193. 189Long BeachCalifornia, United States
    580.9×
  194. 194Kathmandulow-cost sensorsBagmati Province, Nepal
    580.8×
  195. 194Samut PrakanSamut Prakan, Thailand
    580.8×
  196. 194TakasakiGunma, Japan
    580.8×
  197. 194Little RockArkansas, United States
    580.8×
  198. 194WilkinsburgPennsylvania, United States
    580.8×
  199. 194Inglewoodlow-cost sensorsCalifornia, United States
    580.8×
  200. 194StocktonCalifornia, United States
    580.8×

Top 200 of 1,850 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

Use this board

SmogRank, most polluted cities, PM2.5, August 1, 2023, smogrank.com/history/2023-08-01 (accessed 2 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.