SmogRank / History / July 22, 2023

Most polluted cities on July 22, 2023

1,353 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 July 22, 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. 2DushanbeDushanbe, Tajikistan
    1836.7×
  3. 3Fort McMurrayAlberta, Canada
    1786.3×
  4. 4OsornoLos Lagos Region, Chile
    1675.3×
  5. 5CoyhaiqueAysén, Chile
    1574.3×
  6. 6Kampalalow-cost sensorsCentral Region, Uganda
    1463.6×
  7. 7Puerto VarasLos Lagos Region, Chile
    1453.6×
  8. 8La UniónLos Ríos Region, Chile
    1383.4×
  9. 9EdmontonAlberta, Canada
    1343.3×
  10. 10Prince AlbertSaskatchewan, Canada
    1323.2×
  11. 11NacimientoBiobio, Chile
    1233.0×
  12. 12Puerto MonttLos Lagos Region, Chile
    1192.9×
  13. 13Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1132.7×
  14. 14CuranilahueBiobio, Chile
    1122.7×
  15. 15RengoO'Higgins Region, Chile
    1112.6×
  16. 16PristinaPristina, Kosovo
    1112.6×
  17. 17HualpénBiobio, Chile
    1082.6×
  18. 18Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1082.5×
  19. 19Dhakalow-cost sensorsDhaka Division, Bangladesh
    1032.4×
  20. 20ReginaSaskatchewan, Canada
    1022.4×
  21. 21AsprópyrgosAttica, Greece
    1012.4×
  22. 22Lahorelow-cost sensorsPunjab, Pakistan
    1012.4×
  23. 23Puerto AysénAysén, Chile
    972.3×
  24. 24CoronelBiobio, Chile
    972.2×
  25. 25Santa Anita - Los FicusLima region, Peru
    962.2×
  26. 26SaskatoonSaskatchewan, Canada
    962.2×
  27. 27Karachilow-cost sensorsSindh, Pakistan
    952.2×
  28. 28SliemaTas-Sliema, Malta
    942.2×
  29. 29DelhiDelhi, India
    912.0×
  30. 30HualquiBiobio, Chile
    912.0×
  31. 31AnconaThe Marches, Italy
    902.0×
  32. 32MostaIl-Mosta, Malta
    902.0×
  33. 33ChennaiTamil Nadu, India
    902.0×
  34. 34ŻabbarĦaż-Żabbar, Malta
    892.0×
  35. 35ShenyangLiaoning, China
    881.9×
  36. 36SantiagoSantiago Metropolitan, Chile
    881.9×
  37. 37HanoiHanoi, Vietnam
    851.8×
  38. 38SarajevoFederation of B&H, Bosnia and Herzegovina
    851.8×
  39. 39TemucoAraucania, Chile
    841.8×
  40. 40AthensAttica, Greece
    831.8×
  41. 40SalorTashkent Region, Uzbekistan
    831.8×
  42. 42Swift CurrentSaskatchewan, Canada
    831.8×
  43. 43ValdiviaLos Ríos Region, Chile
    831.7×
  44. 44XonacatlánMéxico, Mexico
    831.7×
  45. 45MexicaliBaja California, Mexico
    821.7×
  46. 46Sherwood ParkAlberta, Canada
    811.7×
  47. 47Ciudad JuárezChihuahua, Mexico
    811.7×
  48. 48QuillotaValparaiso, Chile
    811.7×
  49. 49AntofagastaAntofagasta, Chile
    801.6×
  50. 50BeijingBeijing, China
    791.6×
  51. 51Puente AltoSantiago Metropolitan, Chile
    791.6×
  52. 52CauquenesMaule Region, Chile
    791.6×
  53. 53ModugnoApulia, Italy
    781.6×
  54. 54AcharnésAttica, Greece
    781.6×
  55. 55TolucaMéxico, Mexico
    771.5×
  56. 55Le RobertMartinique, Martinique
    771.5×
  57. 57DębicaSubcarpathia, Poland
    771.5×
  58. 58SouthamptonEngland, United Kingdom
    771.5×
  59. 59Le LamentinMartinique, Martinique
    771.5×
  60. 60CatañoCataño, Puerto Rico
    761.5×
  61. 60St. AlbertAlberta, Canada
    761.5×
  62. 62BakersfieldCalifornia, United States
    761.5×
  63. 63KhalándrionAttica, Greece
    761.5×
  64. 64Tha BoNong Khai, Thailand
    751.5×
  65. 64BeneventoCampania, Italy
    751.5×
  66. 66Fort-de-FranceMartinique, Martinique
    751.5×
  67. 66TalcahuanoBiobio, Chile
    751.5×
  68. 68La SerenaCoquimbo Region, Chile
    751.5×
  69. 68CuricóMaule Region, Chile
    751.5×
  70. 70PiraeusAttica, Greece
    741.4×
  71. 70ChillánÑuble, Chile
    741.4×
  72. 72Civitanova MarcheThe Marches, Italy
    731.4×
  73. 72LimaLima Province, Peru
    731.4×
  74. 72BrandonManitoba, Canada
    731.4×
  75. 75Ciudad ApodacaNuevo León, Mexico
    731.4×
  76. 75FontanaCalifornia, United States
    731.4×
  77. 77TijuanaBaja California, Mexico
    721.4×
  78. 78Islamabadlow-cost sensorsIslamabad, Pakistan
    721.4×
  79. 78PesaroThe Marches, Italy
    721.4×
  80. 78TalaganteSantiago Metropolitan, Chile
    721.4×
  81. 81BitolaBitola, North Macedonia
    721.4×
  82. 81Alto HospicioTarapacá, Chile
    721.4×
  83. 83Great FallsMontana, United States
    711.3×
  84. 84BamakoBamako, Mali
    711.3×
  85. 84Falconara MarittimaThe Marches, Italy
    711.3×
  86. 84AricaArica y Parinacota Region, Chile
    711.3×
  87. 87Ceglie MessapicaApulia, Italy
    711.3×
  88. 87Los ÁngelesBiobio, Chile
    711.3×
  89. 89West FargoNorth Dakota, United States
    701.3×
  90. 90UkiahCalifornia, United States
    701.3×
  91. 91RancaguaO'Higgins Region, Chile
    701.3×
  92. 91GlendoraCalifornia, United States
    701.3×
  93. 93KavadarciKavadarci, North Macedonia
    701.3×
  94. 93TocopillaAntofagasta, Chile
    701.3×
  95. 95Prince GeorgeBritish Columbia, Canada
    691.3×
  96. 96VelesVeles, North Macedonia
    691.3×
  97. 96NaplesCampania, Italy
    691.3×
  98. 96Jurupa ValleyCalifornia, United States
    691.3×
  99. 96VisaliaCalifornia, United States
    691.3×
  100. 100Los AngelesCalifornia, United States
    691.2×
  101. 100RiversideCalifornia, United States
    691.2×
  102. 102LotaBiobio, Chile
    691.2×
  103. 103LansingMichigan, United States
    681.2×
  104. 104GuangzhouGuangdong, China
    681.2×
  105. 104FresnoCalifornia, United States
    681.2×
  106. 104San Pedro de la PazBiobio, Chile
    681.2×
  107. 107CopiapóAtacama, Chile
    681.2×
  108. 108TetovoTetovo, North Macedonia
    671.2×
  109. 109ToméBiobio, Chile
    671.2×
  110. 109MaderaCalifornia, United States
    671.2×
  111. 111AntananarivoAnalamanga, Madagascar
    661.2×
  112. 111ChiguayanteBiobio, Chile
    661.2×
  113. 111BurbankCalifornia, United States
    661.2×
  114. 111ClovisCalifornia, United States
    661.2×
  115. 115Red DeerAlberta, Canada
    661.2×
  116. 116CalamaAntofagasta, Chile
    661.1×
  117. 116San Francisco De BorjaLima region, Peru
    661.1×
  118. 118Naucalpan de JuárezMéxico, Mexico
    661.1×
  119. 118HanfordCalifornia, United States
    661.1×
  120. 118Yuba CityCalifornia, United States
    661.1×
  121. 118SarniaOntario, Canada
    661.1×
  122. 122Bang Bo DistrictSamut Prakan, Thailand
    661.1×
  123. 123San Mateo AtencoMéxico, Mexico
    651.1×
  124. 124AlgiersAlgiers, Algeria
    651.1×
  125. 124Bonita SpringsFlorida, United States
    651.1×
  126. 126San CarlosÑuble, Chile
    651.1×
  127. 127Ciudad Benito JuárezNuevo León, Mexico
    641.1×
  128. 127Hawthornelow-cost sensorsCalifornia, United States
    641.1×
  129. 129Villa Poeta José Gálvez BarrenecheaLima region, Peru
    641.1×
  130. 130Viña del MarValparaiso, Chile
    641.1×
  131. 130LinaresMaule Region, Chile
    641.1×
  132. 130Santa CatarinaNuevo León, Mexico
    641.1×
  133. 130Fort LauderdaleFlorida, United States
    641.1×
  134. 130VictorvilleCalifornia, United States
    641.1×
  135. 135Collado-VillalbaMadrid, Spain
    641.1×
  136. 135CelayaGuanajuato, Mexico
    641.1×
  137. 135KamloopsBritish Columbia, Canada
    641.1×
  138. 138BangkokBangkok, Thailand
    631.1×
  139. 138HomesteadFlorida, United States
    631.1×
  140. 138ShreveportLouisiana, United States
    631.1×
  141. 138Casa GrandeArizona, United States
    631.1×
  142. 142QuinteroValparaiso, Chile
    631.0×
  143. 142CalexicoCalifornia, United States
    631.0×
  144. 142TurlockCalifornia, United States
    631.0×
  145. 145SalamancaGuanajuato, Mexico
    631.0×
  146. 145ShakopeeMinnesota, United States
    631.0×
  147. 145ComptonCalifornia, United States
    631.0×
  148. 148IlindenIlinden, North Macedonia
    631.0×
  149. 148DearbornMichigan, United States
    631.0×
  150. 148Port HuronMichigan, United States
    631.0×
  151. 148AberdeenSouth Dakota, United States
    631.0×
  152. 152JesiThe Marches, Italy
    631.0×
  153. 152ConcónValparaiso, Chile
    631.0×
  154. 152PortervilleCalifornia, United States
    631.0×
  155. 155Phra PradaengSamut Prakan, Thailand
    621.0×
  156. 155HollandMichigan, United States
    621.0×
  157. 155WatertownSouth Dakota, United States
    621.0×
  158. 155Inglewoodlow-cost sensorsCalifornia, United States
    621.0×
  159. 155LincolnCalifornia, United States
    621.0×
  160. 160BakuBaki, Azerbaijan
    621.0×
  161. 160KalamazooMichigan, United States
    621.0×
  162. 160MinneapolisMinnesota, United States
    621.0×
  163. 160Santa Monicalow-cost sensorsCalifornia, United States
    621.0×
  164. 164CantonOhio, United States
    621.0×
  165. 165AustinTexas, United States
    621.0×
  166. 165Torrancelow-cost sensorsCalifornia, United States
    621.0×
  167. 167Samut SakhonSamut Sakhon, Thailand
    611.0×
  168. 167KrakówLesser Poland, Poland
    611.0×
  169. 167SalernoCampania, Italy
    611.0×
  170. 167ConcepciónBiobio, Chile
    611.0×
  171. 167El CentroCalifornia, United States
    611.0×
  172. 172Abujalow-cost sensorsFCT, Nigeria
    611.0×
  173. 172BurnsvilleMinnesota, United States
    611.0×
  174. 172SacramentoCalifornia, United States
    611.0×
  175. 175KochaniKochani, North Macedonia
    611.0×
  176. 175Saint PaulMinnesota, United States
    611.0×
  177. 175Carsonlow-cost sensorsCalifornia, United States
    611.0×
  178. 178TorreviejaValencia, Spain
    611.0×
  179. 178SaltilloCoahuila, Mexico
    611.0×
  180. 178SpringdaleArkansas, United States
    611.0×
  181. 178MiamiFlorida, United States
    611.0×
  182. 178Saint CloudMinnesota, United States
    611.0×
  183. 183Kathmandulow-cost sensorsBagmati Province, Nepal
    610.9×
  184. 183MonterreyNuevo León, Mexico
    610.9×
  185. 183Iowa CityIowa, United States
    610.9×
  186. 183Santa ClaritaCalifornia, United States
    610.9×
  187. 187CuencaCastille-La Mancha, Spain
    600.9×
  188. 187DetroitMichigan, United States
    600.9×
  189. 187Lincoln ParkMichigan, United States
    600.9×
  190. 187El CajonCalifornia, United States
    600.9×
  191. 191TarnówLesser Poland, Poland
    600.9×
  192. 191LondonOntario, Canada
    600.9×
  193. 193Mexico CityMexico City, Mexico
    600.9×
  194. 193GaryIndiana, United States
    600.9×
  195. 193Grand RapidsMichigan, United States
    600.9×
  196. 193WindsorOntario, Canada
    600.9×
  197. 197Khlong LuangPathum Thani, Thailand
    600.9×
  198. 197La Línea de la ConcepciónAndalusia, Spain
    600.9×
  199. 197Tepeji del Río de OcampoHidalgo, Mexico
    600.9×
  200. 197TalcaMaule Region, Chile
    600.9×

Top 200 of 1,353 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, July 22, 2023, smogrank.com/history/2023-07-22 (accessed 2 Oct 2026).

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