SmogRank / History / April 15, 2023

Most polluted cities on April 15, 2023

1,305 cities ranked by their average PM2.5 over the day; the worst was San Luis Potosí, Mexico, at 971.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during April 15, 2023. All episodes.

← San Luis Potosí 971.0 µg/m³ 900 µg/m³15 WHO 24-hour guideline
Every city ranked for April 15, 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. 1San Luis PotosíSan Luis Potosí, Mexico
    500+64.7×
  2. 2DushanbeDushanbe, Tajikistan
    500+22.1×
  3. 3Dhakalow-cost sensorsDhaka Division, Bangladesh
    25812.2×
  4. 4Kathmandulow-cost sensorsBagmati Province, Nepal
    2249.9×
  5. 5BamakoBamako, Mali
    2018.4×
  6. 6Lahorelow-cost sensorsPunjab, Pakistan
    1917.5×
  7. 7DelhiDelhi, India
    1685.3×
  8. 8CoyhaiqueAysén, Chile
    1594.4×
  9. 9Bang Khun ThianBangkok, Thailand
    1584.4×
  10. 10Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1574.3×
  11. 11Nakhon PathomNakhon Pathom, Thailand
    1554.1×
  12. 12Samut PrakanSamut Prakan, Thailand
    1513.7×
  13. 13BangkokBangkok, Thailand
    1493.7×
  14. 14Nong KhaemBangkok, Thailand
    1453.6×
  15. 15HanoiHanoi, Vietnam
    1443.5×
  16. 16ShenyangLiaoning, China
    1433.5×
  17. 17Samut SakhonSamut Sakhon, Thailand
    1363.3×
  18. 18Mueang NonthaburiNonthaburi, Thailand
    1353.3×
  19. 19Phra PradaengSamut Prakan, Thailand
    1323.2×
  20. 19Khlong LuangPathum Thani, Thailand
    1323.2×
  21. 21Bang KapiBangkok, Thailand
    1283.1×
  22. 22TlaquepaqueJalisco, Mexico
    1283.1×
  23. 23Puerto AysénAysén, Chile
    1253.0×
  24. 24Bang Bo DistrictSamut Prakan, Thailand
    1202.9×
  25. 25LinaresMaule Region, Chile
    1192.9×
  26. 26ChillánÑuble, Chile
    1182.8×
  27. 27YangonYangon, Myanmar
    1182.8×
  28. 28RabinalBaja Verapaz, Guatemala
    1172.8×
  29. 29Guatemala CityGuatemala, Guatemala
    1172.8×
  30. 30Islamabadlow-cost sensorsIslamabad, Pakistan
    1172.8×
  31. 31Puerto VarasLos Lagos Region, Chile
    1132.7×
  32. 32MexicaliBaja California, Mexico
    1132.7×
  33. 33RancaguaO'Higgins Region, Chile
    1072.5×
  34. 34Poza Rica de HidalgoVeracruz, Mexico
    1062.5×
  35. 35Ciudad Benito JuárezNuevo León, Mexico
    1042.5×
  36. 36GuangzhouGuangdong, China
    1042.4×
  37. 37CuricóMaule Region, Chile
    1032.4×
  38. 38San CarlosÑuble, Chile
    1022.4×
  39. 39VeracruzVeracruz, Mexico
    1012.4×
  40. 39TalcaMaule Region, Chile
    1012.4×
  41. 41JakartaJakarta, Indonesia
    992.3×
  42. 42HyderabadTelangana, India
    982.3×
  43. 43CelayaGuanajuato, Mexico
    972.3×
  44. 44Kampalalow-cost sensorsCentral Region, Uganda
    972.2×
  45. 45ConakryConakry, Guinea
    962.2×
  46. 46RengoO'Higgins Region, Chile
    942.1×
  47. 47Túxpam de Rodríguez CanoVeracruz, Mexico
    932.1×
  48. 48BeijingBeijing, China
    912.0×
  49. 49Port HuronMichigan, United States
    892.0×
  50. 50KitchenerOntario, Canada
    881.9×
  51. 51NacimientoBiobio, Chile
    861.9×
  52. 52OsornoLos Lagos Region, Chile
    861.9×
  53. 53Puente AltoSantiago Metropolitan, Chile
    861.9×
  54. 54La UniónLos Ríos Region, Chile
    861.9×
  55. 55San Mateo AtencoMéxico, Mexico
    861.8×
  56. 55LimaLima Province, Peru
    861.8×
  57. 57TijuanaBaja California, Mexico
    851.8×
  58. 58BelmopanCayo District, Belize
    851.8×
  59. 59Tepeji del Río de OcampoHidalgo, Mexico
    851.8×
  60. 60MumbaiMaharashtra, India
    851.8×
  61. 61SarniaOntario, Canada
    841.8×
  62. 62DetroitMichigan, United States
    831.8×
  63. 63KhartoumKhartoum, Sudan
    831.7×
  64. 64ToméBiobio, Chile
    821.7×
  65. 65Karachilow-cost sensorsSindh, Pakistan
    821.7×
  66. 65TolucaMéxico, Mexico
    821.7×
  67. 67XonacatlánMéxico, Mexico
    821.7×
  68. 68EriePennsylvania, United States
    811.7×
  69. 69HualquiBiobio, Chile
    811.7×
  70. 69CoronelBiobio, Chile
    811.7×
  71. 71ZapopanJalisco, Mexico
    811.7×
  72. 72St. ThomasOntario, Canada
    811.7×
  73. 73HualpénBiobio, Chile
    811.7×
  74. 73DearbornMichigan, United States
    811.7×
  75. 73BuffaloNew York, United States
    811.7×
  76. 73LondonOntario, Canada
    811.7×
  77. 77PristinaPristina, Kosovo
    791.6×
  78. 78PueblaPuebla, Mexico
    791.6×
  79. 79San Francisco TlalcilalcalpanMéxico, Mexico
    781.6×
  80. 79Ciudad NezahualcoyotlMéxico, Mexico
    781.6×
  81. 79TemucoAraucania, Chile
    781.6×
  82. 79TalcahuanoBiobio, Chile
    781.6×
  83. 83RostockMecklenburg-Vorpommern, Germany
    781.6×
  84. 84TaylorMichigan, United States
    781.6×
  85. 85SantiagoSantiago Metropolitan, Chile
    771.6×
  86. 86CoatzacoalcosVeracruz, Mexico
    771.5×
  87. 86QuillotaValparaiso, Chile
    771.5×
  88. 88AntananarivoAnalamanga, Madagascar
    761.5×
  89. 88EdinburgTexas, United States
    761.5×
  90. 90QuinteroValparaiso, Chile
    761.5×
  91. 90RedfordMichigan, United States
    761.5×
  92. 92GüstrowMecklenburg-Vorpommern, Germany
    761.5×
  93. 93Addis AbabaAddis Ababa, Ethiopia
    761.5×
  94. 94ChiguayanteBiobio, Chile
    751.5×
  95. 94GuadalajaraJalisco, Mexico
    751.5×
  96. 96St. CatharinesOntario, Canada
    751.5×
  97. 97WismarMecklenburg-Vorpommern, Germany
    751.5×
  98. 97StralsundMecklenburg-Vorpommern, Germany
    751.5×
  99. 99BaghdadBaghdad, Iraq
    751.5×
  100. 100JenisonMichigan, United States
    741.4×
  101. 101KielSchleswig-Holstein, Germany
    741.4×
  102. 101CauquenesMaule Region, Chile
    741.4×
  103. 101Ciudad ApodacaNuevo León, Mexico
    741.4×
  104. 104JeddahMecca Region, Saudi Arabia
    741.4×
  105. 104ConcepciónBiobio, Chile
    741.4×
  106. 106FlintMichigan, United States
    741.4×
  107. 107ValdiviaLos Ríos Region, Chile
    741.4×
  108. 108Puerto MonttLos Lagos Region, Chile
    731.4×
  109. 108Silao de la VictoriaGuanajuato, Mexico
    731.4×
  110. 110Grand RapidsMichigan, United States
    731.4×
  111. 111YpsilantiMichigan, United States
    731.4×
  112. 112San Andrés TuxtlaVeracruz, Mexico
    721.4×
  113. 113LotaBiobio, Chile
    721.4×
  114. 113BrantfordOntario, Canada
    721.4×
  115. 115CuranilahueBiobio, Chile
    721.4×
  116. 116Şabāḩ as SālimMubārak al Kabīr, Kuwait
    721.4×
  117. 117Viña del MarValparaiso, Chile
    711.3×
  118. 118AntofagastaAntofagasta, Chile
    711.3×
  119. 118SalamancaGuanajuato, Mexico
    711.3×
  120. 118Ciudad JuárezChihuahua, Mexico
    711.3×
  121. 121NeuruppinBrandenburg, Germany
    711.3×
  122. 121ConcónValparaiso, Chile
    711.3×
  123. 121San Francisco De BorjaLima region, Peru
    711.3×
  124. 124San Pedro de la PazBiobio, Chile
    711.3×
  125. 125AshgabatAshgabat, Turkmenistan
    711.3×
  126. 126CalexicoCalifornia, United States
    701.3×
  127. 127La SerenaCoquimbo Region, Chile
    701.3×
  128. 128CopiapóAtacama, Chile
    701.3×
  129. 128Corpus ChristiTexas, United States
    701.3×
  130. 128Greater SudburyOntario, Canada
    701.3×
  131. 131Lagoslow-cost sensorsLagos, Nigeria
    701.3×
  132. 132HamiltonOntario, Canada
    691.3×
  133. 133Santiago de QuerétaroQuerétaro, Mexico
    691.3×
  134. 133BarrieOntario, Canada
    691.3×
  135. 135LübeckSchleswig-Holstein, Germany
    691.2×
  136. 136Abujalow-cost sensorsFCT, Nigeria
    681.2×
  137. 136EberswaldeBrandenburg, Germany
    681.2×
  138. 138FlensburgSchleswig-Holstein, Germany
    681.2×
  139. 139Mexico CityMexico City, Mexico
    681.2×
  140. 140ColomboWestern Province, Sri Lanka
    671.2×
  141. 141CuernavacaMorelos, Mexico
    671.2×
  142. 142Los ÁngelesBiobio, Chile
    671.2×
  143. 143Victoria de DurangoDurango, Mexico
    661.2×
  144. 143Bay CityMichigan, United States
    661.2×
  145. 145DrammenBuskerud, Norway
    661.2×
  146. 145CheektowagaNew York, United States
    661.2×
  147. 147CoquimboCoquimbo Region, Chile
    661.1×
  148. 147KenmoreNew York, United States
    661.1×
  149. 147Santa Anita - Los FicusLima region, Peru
    661.1×
  150. 150WittenbergeBrandenburg, Germany
    661.1×
  151. 151San Luis de la PazGuanajuato, Mexico
    661.1×
  152. 152IndianapolisIndiana, United States
    661.1×
  153. 153BakuBaki, Azerbaijan
    651.1×
  154. 153TeltowBrandenburg, Germany
    651.1×
  155. 153Schwedt (Oder)Brandenburg, Germany
    651.1×
  156. 153TocopillaAntofagasta, Chile
    651.1×
  157. 153MonterreyNuevo León, Mexico
    651.1×
  158. 158MalmöSkåne, Sweden
    651.1×
  159. 158PotsdamBrandenburg, Germany
    651.1×
  160. 160DelmenhorstLower Saxony, Germany
    651.1×
  161. 161Frankfurt (Oder)Brandenburg, Germany
    651.1×
  162. 162ItzehoeSchleswig-Holstein, Germany
    651.1×
  163. 163Kuala LumpurKuala Lumpur, Malaysia
    641.1×
  164. 164HamburgHamburg, Germany
    641.1×
  165. 164WaukeshaWisconsin, United States
    641.1×
  166. 166NauenBrandenburg, Germany
    641.1×
  167. 166RochesterNew York, United States
    641.1×
  168. 166Jurupa ValleyCalifornia, United States
    641.1×
  169. 166San DiegoCalifornia, United States
    641.1×
  170. 170Bernau bei BerlinBrandenburg, Germany
    641.1×
  171. 170BrocktonMassachusetts, United States
    641.1×
  172. 172BerlinState of Berlin, Germany
    641.1×
  173. 172Naucalpan de JuárezMéxico, Mexico
    641.1×
  174. 174SalorTashkent Region, Uzbekistan
    631.0×
  175. 175ElkhartIndiana, United States
    631.0×
  176. 176HoustonTexas, United States
    631.0×
  177. 177CallaoCallao, Peru
    631.0×
  178. 178AppletonWisconsin, United States
    621.0×
  179. 179San IsidroCanary Islands, Spain
    621.0×
  180. 180KleinmachnowBrandenburg, Germany
    621.0×
  181. 181Missouri CityTexas, United States
    621.0×
  182. 181Blankenfelde-MahlowBrandenburg, Germany
    621.0×
  183. 183GuanajuatoGuanajuato, Mexico
    611.0×
  184. 184BremenBremen, Germany
    611.0×
  185. 184Cadereyta JiménezNuevo León, Mexico
    611.0×
  186. 184CalamaAntofagasta, Chile
    611.0×
  187. 184South MilwaukeeWisconsin, United States
    611.0×
  188. 184BanningCalifornia, United States
    611.0×
  189. 189ZionIllinois, United States
    611.0×
  190. 190ManamaManama, Bahrain
    611.0×
  191. 191LubnjowBrandenburg, Germany
    611.0×
  192. 191VigoGalicia, Spain
    611.0×
  193. 191HueytownAlabama, United States
    611.0×
  194. 191South BendIndiana, United States
    611.0×
  195. 191Green BayWisconsin, United States
    611.0×
  196. 196MagdeburgSaxony-Anhalt, Germany
    610.9×
  197. 196ClevelandOhio, United States
    610.9×
  198. 198Yerevanlow-cost sensorsYerevan, Armenia
    600.9×
  199. 198NišCentral Serbia, Serbia
    600.9×
  200. 198Almatylow-cost sensorsAlmaty, Kazakhstan
    600.9×

Top 200 of 1,305 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 15, 2023, smogrank.com/history/2023-04-15 (accessed 2 Oct 2026).

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