SmogRank / History / May 11, 2023

Most polluted cities on May 11, 2023

1,555 cities ranked by their average PM2.5 over the day; the worst was Lahore, Pakistan, at 134.0 µg/m³. Each city's own local calendar day.

← Lahore 134.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for May 11, 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. 1Lahorelow-cost sensorsPunjab, Pakistan
    2098.9×
  2. 2DelhiDelhi, India
    2008.3×
  3. 3LinaresMaule Region, Chile
    1816.6×
  4. 4HyderabadTelangana, India
    1786.3×
  5. 5BloemfonteinFree State, South Africa
    1745.9×
  6. 6NacimientoBiobio, Chile
    1705.5×
  7. 7TlaquepaqueJalisco, Mexico
    1614.7×
  8. 8HualquiBiobio, Chile
    1614.6×
  9. 9RancaguaO'Higgins Region, Chile
    1594.5×
  10. 10CoronelBiobio, Chile
    1594.5×
  11. 11ChennaiTamil Nadu, India
    1594.5×
  12. 12ThembisaGauteng, South Africa
    1574.3×
  13. 13TalaganteSantiago Metropolitan, Chile
    1574.2×
  14. 14Dhakalow-cost sensorsDhaka Division, Bangladesh
    1554.1×
  15. 15SantiagoSantiago Metropolitan, Chile
    1544.0×
  16. 16CuricóMaule Region, Chile
    1544.0×
  17. 17CoyhaiqueAysén, Chile
    1523.8×
  18. 18ToméBiobio, Chile
    1513.7×
  19. 19BeijingBeijing, China
    1493.7×
  20. 20TalcaMaule Region, Chile
    1463.6×
  21. 21QuillotaValparaiso, Chile
    1393.4×
  22. 22Viña del MarValparaiso, Chile
    1363.3×
  23. 23San CarlosÑuble, Chile
    1353.3×
  24. 24CuranilahueBiobio, Chile
    1343.3×
  25. 24ChiguayanteBiobio, Chile
    1343.3×
  26. 26ChillánÑuble, Chile
    1323.2×
  27. 27TemucoAraucania, Chile
    1273.1×
  28. 28BaghdadBaghdad, Iraq
    1273.1×
  29. 29HualpénBiobio, Chile
    1243.0×
  30. 30ConcepciónBiobio, Chile
    1243.0×
  31. 31JohannesburgGauteng, South Africa
    1222.9×
  32. 32JakartaJakarta, Indonesia
    1222.9×
  33. 33OsornoLos Lagos Region, Chile
    1212.9×
  34. 34ValdiviaLos Ríos Region, Chile
    1202.9×
  35. 35TokozaGauteng, South Africa
    1182.8×
  36. 36Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1182.8×
  37. 37MumbaiMaharashtra, India
    1142.7×
  38. 38BrakpanGauteng, South Africa
    1132.7×
  39. 39La UniónLos Ríos Region, Chile
    1112.6×
  40. 39ConcónValparaiso, Chile
    1112.6×
  41. 41TalcahuanoBiobio, Chile
    1102.6×
  42. 42Suphan BuriSuphan Buri, Thailand
    1082.6×
  43. 42RabinalBaja Verapaz, Guatemala
    1082.6×
  44. 42Guatemala CityGuatemala, Guatemala
    1082.6×
  45. 45LotaBiobio, Chile
    1082.6×
  46. 46Puente AltoSantiago Metropolitan, Chile
    1072.5×
  47. 47QuinteroValparaiso, Chile
    1042.5×
  48. 47CoquimboCoquimbo Region, Chile
    1042.5×
  49. 49CauquenesMaule Region, Chile
    1032.4×
  50. 50Puerto AysénAysén, Chile
    1022.4×
  51. 51CelayaGuanajuato, Mexico
    1002.4×
  52. 52Kampalalow-cost sensorsCentral Region, Uganda
    992.3×
  53. 53AntofagastaAntofagasta, Chile
    992.3×
  54. 54Hacienda Santa FeJalisco, Mexico
    992.3×
  55. 55Bang NaBangkok, Thailand
    992.3×
  56. 56La SerenaCoquimbo Region, Chile
    982.3×
  57. 57Ga-RankuwaNorth West, South Africa
    982.3×
  58. 58ThabazimbiLimpopo, South Africa
    952.2×
  59. 58GuangzhouGuangdong, China
    952.2×
  60. 60Islamabadlow-cost sensorsIslamabad, Pakistan
    942.1×
  61. 61Los ÁngelesBiobio, Chile
    932.1×
  62. 62Puerto VarasLos Lagos Region, Chile
    932.1×
  63. 63KolkataWest Bengal, India
    922.1×
  64. 64Grande PrairieAlberta, Canada
    922.1×
  65. 65Addis AbabaAddis Ababa, Ethiopia
    902.0×
  66. 65EdinburgTexas, United States
    902.0×
  67. 67Ciudad JuárezChihuahua, Mexico
    902.0×
  68. 68Khlong Sam WaBangkok, Thailand
    892.0×
  69. 69San Pedro de la PazBiobio, Chile
    892.0×
  70. 70NanNan, Thailand
    881.9×
  71. 71Karachilow-cost sensorsSindh, Pakistan
    871.9×
  72. 72Naucalpan de JuárezMéxico, Mexico
    861.9×
  73. 72Khan Na YaoBangkok, Thailand
    861.9×
  74. 74AstanaAstana, Kazakhstan
    861.9×
  75. 74Puerto MonttLos Lagos Region, Chile
    861.9×
  76. 76AntananarivoAnalamanga, Madagascar
    841.8×
  77. 77Fort St. JohnBritish Columbia, Canada
    841.8×
  78. 78Mexico CityMexico City, Mexico
    841.8×
  79. 79CopiapóAtacama, Chile
    821.7×
  80. 79LaredoTexas, United States
    821.7×
  81. 81Saphan SungBangkok, Thailand
    821.7×
  82. 82SalorTashkent Region, Uzbekistan
    821.7×
  83. 83Lat KrabangBangkok, Thailand
    811.7×
  84. 84Şabāḩ as SālimMubārak al Kabīr, Kuwait
    811.7×
  85. 84MokopaneLimpopo, South Africa
    811.7×
  86. 86BritsNorth West, South Africa
    811.7×
  87. 87Ban ChangRayong, Thailand
    811.7×
  88. 88Bueng KumBangkok, Thailand
    801.7×
  89. 89SalamancaGuanajuato, Mexico
    801.7×
  90. 90Alto HospicioTarapacá, Chile
    791.6×
  91. 91DurbanKwaZulu-Natal, South Africa
    791.6×
  92. 91Nong KhaemBangkok, Thailand
    791.6×
  93. 91San AntonioTexas, United States
    791.6×
  94. 94Live OakTexas, United States
    781.6×
  95. 94West MifflinPennsylvania, United States
    781.6×
  96. 96Lak SiBangkok, Thailand
    781.6×
  97. 97AshgabatAshgabat, Turkmenistan
    771.5×
  98. 97MiddelburgMpumalanga, South Africa
    771.5×
  99. 99PristinaPristina, Kosovo
    771.5×
  100. 99Laem ChabangChon Buri, Thailand
    771.5×
  101. 99Fort McMurrayAlberta, Canada
    771.5×
  102. 102Mae SaiChiang Rai, Thailand
    771.5×
  103. 103Bang KapiBangkok, Thailand
    761.5×
  104. 104AustinTexas, United States
    761.5×
  105. 105Sing BuriSing Buri, Thailand
    751.5×
  106. 106Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    751.5×
  107. 107Wan ChaiWan Chai, Hong Kong
    741.4×
  108. 108Silao de la VictoriaGuanajuato, Mexico
    741.4×
  109. 108Sai MaiBangkok, Thailand
    741.4×
  110. 110AricaArica y Parinacota Region, Chile
    731.4×
  111. 111Corpus ChristiTexas, United States
    731.4×
  112. 112Khlong LuangPathum Thani, Thailand
    731.4×
  113. 113BangkokBangkok, Thailand
    721.4×
  114. 113Las Palmas de Gran CanariaCanary Islands, Spain
    721.4×
  115. 115DushanbeDushanbe, Tajikistan
    721.4×
  116. 115Lop BuriLopburi, Thailand
    721.4×
  117. 115LoeiLoei, Thailand
    721.4×
  118. 115Ban Samae DamBangkok, Thailand
    721.4×
  119. 119TocopillaAntofagasta, Chile
    721.4×
  120. 120Ban Khlong PrawetBangkok, Thailand
    721.3×
  121. 121PhetchabunPhetchabun, Thailand
    711.3×
  122. 122León de los AldamaGuanajuato, Mexico
    711.3×
  123. 123LampangLampang, Thailand
    711.3×
  124. 123HanoiHanoi, Vietnam
    711.3×
  125. 125Ban Talat BuengChon Buri, Thailand
    711.3×
  126. 126RatchaburiRatchaburi, Thailand
    711.3×
  127. 127RayongRayong, Thailand
    701.3×
  128. 127KapellenFlanders, Belgium
    701.3×
  129. 129Mae SotTak, Thailand
    701.3×
  130. 129Mong KokYau Tsim Mong District, Hong Kong
    701.3×
  131. 131Eagle PassTexas, United States
    701.3×
  132. 132Chiang MaiChiang Mai, Thailand
    691.3×
  133. 132Mueang NonthaburiNonthaburi, Thailand
    691.3×
  134. 132West FargoNorth Dakota, United States
    691.3×
  135. 135Oak LawnIllinois, United States
    691.2×
  136. 136SaraburiSaraburi, Thailand
    681.2×
  137. 136VictoriaCentral and Western, Hong Kong
    681.2×
  138. 138ConakryConakry, Guinea
    681.2×
  139. 138Fort WorthTexas, United States
    681.2×
  140. 140PhiladelphiaPennsylvania, United States
    681.2×
  141. 140DetroitMichigan, United States
    681.2×
  142. 142KigaliKigali, Rwanda
    681.2×
  143. 142Udon ThaniUdon Thani, Thailand
    681.2×
  144. 144KielSchleswig-Holstein, Germany
    671.2×
  145. 145McDonoughGeorgia, United States
    671.2×
  146. 145SaginawTexas, United States
    671.2×
  147. 145LancasterPennsylvania, United States
    671.2×
  148. 148Bang Bo DistrictSamut Prakan, Thailand
    671.2×
  149. 148CorsicanaTexas, United States
    671.2×
  150. 150Novi PazarCentral Serbia, Serbia
    661.2×
  151. 151Tsuen WanTsuen Wan, Hong Kong
    661.2×
  152. 152ArrecifeCanary Islands, Spain
    661.1×
  153. 152VenrayLimburg, The Netherlands
    661.1×
  154. 154YalaYala, Thailand
    661.1×
  155. 154Ubon RatchathaniUbon Ratchathani, Thailand
    661.1×
  156. 154Nakhon RatchasimaNakhon Ratchasima, Thailand
    661.1×
  157. 154Banja LukaSrpska, Bosnia and Herzegovina
    661.1×
  158. 158PhichitPhichit, Thailand
    661.1×
  159. 158Tuen MunTuen Mun, Hong Kong
    661.1×
  160. 160KlerksdorpNorth West, South Africa
    661.1×
  161. 160MukdahanMukdahan, Thailand
    661.1×
  162. 160GreenvilleSouth Carolina, United States
    661.1×
  163. 160CantonOhio, United States
    661.1×
  164. 164ĆuprijaCentral Serbia, Serbia
    651.1×
  165. 164BensalemPennsylvania, United States
    651.1×
  166. 166PhraePhrae, Thailand
    651.1×
  167. 167LamphunLamphun, Thailand
    651.1×
  168. 168Jastrzębie ZdrójSilesia, Poland
    651.1×
  169. 169Tha BoNong Khai, Thailand
    641.1×
  170. 169GuanajuatoGuanajuato, Mexico
    641.1×
  171. 169DentonTexas, United States
    641.1×
  172. 172Sau Mau PingKwun Tong District, Hong Kong
    641.1×
  173. 172FlintMichigan, United States
    641.1×
  174. 172ElizabethNew Jersey, United States
    641.1×
  175. 175Phra PradaengSamut Prakan, Thailand
    641.1×
  176. 175BetongYala, Thailand
    641.1×
  177. 177KanchanaburiKanchanaburi, Thailand
    641.1×
  178. 177StabroekFlanders, Belgium
    641.1×
  179. 177CalamaAntofagasta, Chile
    641.1×
  180. 180Nakhon PathomNakhon Pathom, Thailand
    641.1×
  181. 180Kwai ChungKwai Tsing District, Hong Kong
    641.1×
  182. 180WismarMecklenburg-Vorpommern, Germany
    641.1×
  183. 183Chai NatChai Nat, Thailand
    631.1×
  184. 184OberhausenNorth Rhine-Westphalia, Germany
    631.0×
  185. 184OstravaMoravian-Silesian Region, Czechia
    631.0×
  186. 184ValjevoCentral Serbia, Serbia
    631.0×
  187. 187San Luis de la PazGuanajuato, Mexico
    631.0×
  188. 187AltoonaPennsylvania, United States
    631.0×
  189. 187HarrisburgPennsylvania, United States
    631.0×
  190. 190Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    631.0×
  191. 190Tai PoTai Po, Hong Kong
    631.0×
  192. 190AntwerpFlanders, Belgium
    631.0×
  193. 193VereenigingGauteng, South Africa
    631.0×
  194. 193DallasTexas, United States
    631.0×
  195. 195KrefeldNorth Rhine-Westphalia, Germany
    631.0×
  196. 195BaytownTexas, United States
    631.0×
  197. 195TorontoOntario, Canada
    631.0×
  198. 198HamarInnlandet, Norway
    621.0×
  199. 198Mission BendTexas, United States
    621.0×
  200. 200Tin Shui WaiYuen Long, Hong Kong
    621.0×

Top 200 of 1,555 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, May 11, 2023, smogrank.com/history/2023-05-11 (accessed 2 Oct 2026).

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