SmogRank / History / April 26, 2023

Most polluted cities on April 26, 2023

1,390 cities ranked by their average PM2.5 over the day; the worst was Piedras Negras, Mexico, at 353.0 µg/m³. Each city's own local calendar day.

← Piedras Negras 353.0 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every city ranked for April 26, 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+23.5×
  2. 2San CarlosÑuble, Chile
    2028.5×
  3. 3SalorTashkent Region, Uzbekistan
    1927.6×
  4. 4ChillánÑuble, Chile
    1887.2×
  5. 5LinaresMaule Region, Chile
    1756.0×
  6. 6BamakoBamako, Mali
    1715.6×
  7. 7NacimientoBiobio, Chile
    1715.6×
  8. 8BloemfonteinFree State, South Africa
    1705.5×
  9. 9TalcaMaule Region, Chile
    1685.3×
  10. 10CuricóMaule Region, Chile
    1685.3×
  11. 11JohannesburgGauteng, South Africa
    1675.2×
  12. 12HualpénBiobio, Chile
    1665.1×
  13. 13DelhiDelhi, India
    1634.9×
  14. 14Los ÁngelesBiobio, Chile
    1584.4×
  15. 15TalcahuanoBiobio, Chile
    1564.2×
  16. 16Ga-RankuwaNorth West, South Africa
    1564.2×
  17. 17Lahorelow-cost sensorsPunjab, Pakistan
    1483.6×
  18. 18Kathmandulow-cost sensorsBagmati Province, Nepal
    1473.6×
  19. 19CauquenesMaule Region, Chile
    1473.6×
  20. 20RancaguaO'Higgins Region, Chile
    1463.6×
  21. 21ThembisaGauteng, South Africa
    1433.5×
  22. 22ToméBiobio, Chile
    1393.4×
  23. 23CuranilahueBiobio, Chile
    1363.3×
  24. 24BodøNordland, Norway
    1353.3×
  25. 25CholulaPuebla, Mexico
    1283.1×
  26. 26RabinalBaja Verapaz, Guatemala
    1263.1×
  27. 26Guatemala CityGuatemala, Guatemala
    1263.1×
  28. 28CoyhaiqueAysén, Chile
    1243.0×
  29. 29KhartoumKhartoum, Sudan
    1202.9×
  30. 30AshgabatAshgabat, Turkmenistan
    1172.8×
  31. 31CoronelBiobio, Chile
    1162.8×
  32. 32TemucoAraucania, Chile
    1142.7×
  33. 33ConcepciónBiobio, Chile
    1132.7×
  34. 34SantiagoSantiago Metropolitan, Chile
    1122.7×
  35. 35TolucaMéxico, Mexico
    1112.6×
  36. 36San Mateo AtencoMéxico, Mexico
    1112.6×
  37. 37CelayaGuanajuato, Mexico
    1112.6×
  38. 38QuillotaValparaiso, Chile
    1072.5×
  39. 39San Pedro de la PazBiobio, Chile
    1062.5×
  40. 40Ciudad JuárezChihuahua, Mexico
    1062.5×
  41. 41Ciudad Benito JuárezNuevo León, Mexico
    1052.5×
  42. 42ValdiviaLos Ríos Region, Chile
    1052.5×
  43. 42TalaganteSantiago Metropolitan, Chile
    1052.5×
  44. 44Islamabadlow-cost sensorsIslamabad, Pakistan
    1032.4×
  45. 45BelmopanCayo District, Belize
    1022.4×
  46. 46VereenigingGauteng, South Africa
    1002.4×
  47. 47San JoséSan José, Costa Rica
    982.3×
  48. 48HualquiBiobio, Chile
    972.2×
  49. 49XonacatlánMéxico, Mexico
    952.2×
  50. 49Viña del MarValparaiso, Chile
    952.2×
  51. 51Puente AltoSantiago Metropolitan, Chile
    952.2×
  52. 52ChiguayanteBiobio, Chile
    922.1×
  53. 53BakuBaki, Azerbaijan
    922.1×
  54. 54BaghdadBaghdad, Iraq
    912.0×
  55. 54Kampalalow-cost sensorsCentral Region, Uganda
    912.0×
  56. 56Addis AbabaAddis Ababa, Ethiopia
    902.0×
  57. 57LotaBiobio, Chile
    902.0×
  58. 58ConcónValparaiso, Chile
    881.9×
  59. 59Puerto VarasLos Lagos Region, Chile
    881.9×
  60. 60OsornoLos Lagos Region, Chile
    871.9×
  61. 61KlerksdorpNorth West, South Africa
    871.9×
  62. 62Silao de la VictoriaGuanajuato, Mexico
    851.8×
  63. 63PinetownKwaZulu-Natal, South Africa
    851.8×
  64. 63QuinteroValparaiso, Chile
    851.8×
  65. 65Ciudad NezahualcoyotlMéxico, Mexico
    851.8×
  66. 66CuernavacaMorelos, Mexico
    841.8×
  67. 67HyderabadTelangana, India
    831.8×
  68. 68San Francisco TlalcilalcalpanMéxico, Mexico
    831.8×
  69. 69VanderbijlparkGauteng, South Africa
    821.7×
  70. 70Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    821.7×
  71. 71PristinaPristina, Kosovo
    811.7×
  72. 72AntananarivoAnalamanga, Madagascar
    811.7×
  73. 72Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    811.7×
  74. 72Mexico CityMexico City, Mexico
    811.7×
  75. 75Santiago de QuerétaroQuerétaro, Mexico
    811.7×
  76. 76Santa CatarinaNuevo León, Mexico
    791.6×
  77. 77GarcíaNuevo León, Mexico
    791.6×
  78. 78AntofagastaAntofagasta, Chile
    771.6×
  79. 79Puerto MonttLos Lagos Region, Chile
    771.5×
  80. 79DetroitMichigan, United States
    771.5×
  81. 81BrakpanGauteng, South Africa
    771.5×
  82. 81PueblaPuebla, Mexico
    771.5×
  83. 81St. ThomasOntario, Canada
    771.5×
  84. 84LazarevacCentral Serbia, Serbia
    761.5×
  85. 85KragujevacCentral Serbia, Serbia
    761.5×
  86. 86MumbaiMaharashtra, India
    761.5×
  87. 87SalamancaGuanajuato, Mexico
    761.5×
  88. 88KigaliKigali, Rwanda
    751.5×
  89. 88León de los AldamaGuanajuato, Mexico
    751.5×
  90. 88Ciudad ApodacaNuevo León, Mexico
    751.5×
  91. 91ValjevoCentral Serbia, Serbia
    751.5×
  92. 92La UniónLos Ríos Region, Chile
    741.4×
  93. 92MonterreyNuevo León, Mexico
    741.4×
  94. 94TlaxcalaTlaxcala, Mexico
    741.4×
  95. 94MexicaliBaja California, Mexico
    741.4×
  96. 96NaplesCampania, Italy
    741.4×
  97. 96Naucalpan de JuárezMéxico, Mexico
    741.4×
  98. 96AguascalientesAguascalientes, Mexico
    741.4×
  99. 99CincinnatiOhio, United States
    731.4×
  100. 100DearbornMichigan, United States
    721.4×
  101. 101ConakryConakry, Guinea
    721.4×
  102. 101NorwoodOhio, United States
    721.4×
  103. 103San Juan del RíoQuerétaro, Mexico
    721.3×
  104. 104TaylorMichigan, United States
    701.3×
  105. 105DurbanKwaZulu-Natal, South Africa
    701.3×
  106. 105Pachuca de SotoHidalgo, Mexico
    701.3×
  107. 105La SerenaCoquimbo Region, Chile
    701.3×
  108. 108Şabāḩ as SālimMubārak al Kabīr, Kuwait
    701.3×
  109. 109CopiapóAtacama, Chile
    691.3×
  110. 110PirotCentral Serbia, Serbia
    691.3×
  111. 111TijuanaBaja California, Mexico
    691.2×
  112. 112CoquimboCoquimbo Region, Chile
    691.2×
  113. 113JeffersonvilleIndiana, United States
    681.2×
  114. 113San DiegoCalifornia, United States
    681.2×
  115. 115NišCentral Serbia, Serbia
    681.2×
  116. 116IrapuatoGuanajuato, Mexico
    681.2×
  117. 117IndianapolisIndiana, United States
    681.2×
  118. 118DushanbeDushanbe, Tajikistan
    671.2×
  119. 118TopekaKansas, United States
    671.2×
  120. 120BirminghamAlabama, United States
    671.2×
  121. 121Karachilow-cost sensorsSindh, Pakistan
    671.2×
  122. 122CalexicoCalifornia, United States
    671.2×
  123. 123ColomboWestern Province, Sri Lanka
    661.2×
  124. 123Los AngelesCalifornia, United States
    661.2×
  125. 125ŠabacCentral Serbia, Serbia
    661.1×
  126. 125TocopillaAntofagasta, Chile
    661.1×
  127. 127GuanajuatoGuanajuato, Mexico
    661.1×
  128. 127LouisvilleKentucky, United States
    661.1×
  129. 129DaytonOhio, United States
    661.1×
  130. 130BéthuneHauts-de-France, France
    651.1×
  131. 130JeffersontownKentucky, United States
    651.1×
  132. 130AnaheimCalifornia, United States
    651.1×
  133. 133Jurupa ValleyCalifornia, United States
    651.1×
  134. 134KościanGreater Poland, Poland
    651.1×
  135. 134Cadereyta JiménezNuevo León, Mexico
    651.1×
  136. 136ZemunCentral Serbia, Serbia
    651.1×
  137. 136Novi PazarCentral Serbia, Serbia
    651.1×
  138. 136Puerto AysénAysén, Chile
    651.1×
  139. 139StilfonteinNorth West, South Africa
    651.1×
  140. 139BloomingtonIndiana, United States
    651.1×
  141. 141Richards BayKwaZulu-Natal, South Africa
    641.1×
  142. 141LancasterPennsylvania, United States
    641.1×
  143. 143Ciudad General EscobedoNuevo León, Mexico
    641.1×
  144. 144Long BeachCalifornia, United States
    641.1×
  145. 145CalamaAntofagasta, Chile
    641.1×
  146. 145AbasoloGuanajuato, Mexico
    641.1×
  147. 145OwensboroKentucky, United States
    641.1×
  148. 148RedfordMichigan, United States
    641.1×
  149. 149CalpulalpanTlaxcala, Mexico
    631.1×
  150. 149ComptonCalifornia, United States
    631.1×
  151. 151San Miguel de AllendeGuanajuato, Mexico
    631.0×
  152. 151Phenix CityAlabama, United States
    631.0×
  153. 151SpringfieldOhio, United States
    631.0×
  154. 154Lexington-FayetteKentucky, United States
    631.0×
  155. 154Valley StationKentucky, United States
    631.0×
  156. 156CantonOhio, United States
    631.0×
  157. 157TilburgNorth Brabant, The Netherlands
    631.0×
  158. 157East Saint LouisIllinois, United States
    631.0×
  159. 157ClevelandOhio, United States
    631.0×
  160. 160TrussvilleAlabama, United States
    621.0×
  161. 160Saint MatthewsKentucky, United States
    621.0×
  162. 160AndersonIndiana, United States
    621.0×
  163. 163JeddahMecca Region, Saudi Arabia
    621.0×
  164. 163ValenciaValencia, Spain
    621.0×
  165. 163IzegemFlanders, Belgium
    621.0×
  166. 163HueytownAlabama, United States
    621.0×
  167. 163Kansas CityKansas, United States
    621.0×
  168. 168RoeselareFlanders, Belgium
    621.0×
  169. 168Bielsko-BialaSilesia, Poland
    621.0×
  170. 170Novi SadVojvodina, Serbia
    621.0×
  171. 171VeracruzVeracruz, Mexico
    621.0×
  172. 171San Luis PotosíSan Luis Potosí, Mexico
    621.0×
  173. 171GreenvilleSouth Carolina, United States
    621.0×
  174. 174DublinOhio, United States
    611.0×
  175. 174Carsonlow-cost sensorsCalifornia, United States
    611.0×
  176. 176East RidgeTennessee, United States
    611.0×
  177. 176West FargoNorth Dakota, United States
    611.0×
  178. 176El CajonCalifornia, United States
    611.0×
  179. 179Abujalow-cost sensorsFCT, Nigeria
    611.0×
  180. 179MenenFlanders, Belgium
    611.0×
  181. 179MedinaOhio, United States
    611.0×
  182. 182ĆuprijaCentral Serbia, Serbia
    611.0×
  183. 182FutogVojvodina, Serbia
    611.0×
  184. 182FairhopeAlabama, United States
    611.0×
  185. 185AnkenyIowa, United States
    611.0×
  186. 186ValenciennesHauts-de-France, France
    610.9×
  187. 186Cape TownWestern Cape, South Africa
    610.9×
  188. 186NewarkDelaware, United States
    610.9×
  189. 186EriePennsylvania, United States
    610.9×
  190. 186Lomitalow-cost sensorsCalifornia, United States
    610.9×
  191. 186El PasoTexas, United States
    610.9×
  192. 186St. John'sNewfoundland and Labrador, Canada
    610.9×
  193. 193PrichardAlabama, United States
    600.9×
  194. 193JacksonMississippi, United States
    600.9×
  195. 193HarrisburgPennsylvania, United States
    600.9×
  196. 196NottinghamEngland, United Kingdom
    600.9×
  197. 196OlatheKansas, United States
    600.9×
  198. 198BelgradeCentral Serbia, Serbia
    600.9×
  199. 198MasonOhio, United States
    600.9×
  200. 198LebanonPennsylvania, United States
    600.9×

Top 200 of 1,390 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, April 26, 2023, smogrank.com/history/2023-04-26 (accessed 2 Oct 2026).

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