SmogRank / History / May 26, 2023

Most polluted cities on May 26, 2023

1,559 cities ranked by their average PM2.5 over the day; the worst was Baghdad, Iraq, at 290.5 µg/m³. Each city's own local calendar day.

Bad-air episodes during May 26, 2023. All episodes.

← Baghdad 290.5 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for May 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. 1BaghdadBaghdad, Iraq
    43019.4×
  2. 2OsornoLos Lagos Region, Chile
    1856.9×
  3. 3Puerto VarasLos Lagos Region, Chile
    1705.5×
  4. 4BrakpanGauteng, South Africa
    1685.3×
  5. 5MálagaAndalusia, Spain
    1665.1×
  6. 6BeijingBeijing, China
    1584.3×
  7. 7Puerto MonttLos Lagos Region, Chile
    1513.7×
  8. 8Lahorelow-cost sensorsPunjab, Pakistan
    1483.6×
  9. 9CuricóMaule Region, Chile
    1483.6×
  10. 10BloemfonteinFree State, South Africa
    1453.6×
  11. 11ThembisaGauteng, South Africa
    1433.5×
  12. 12La UniónLos Ríos Region, Chile
    1343.3×
  13. 13Ga-RankuwaNorth West, South Africa
    1323.2×
  14. 14Guatemala CityGuatemala, Guatemala
    1313.2×
  15. 15CoyhaiqueAysén, Chile
    1303.1×
  16. 16Dhakalow-cost sensorsDhaka Division, Bangladesh
    1293.1×
  17. 17Puerto AysénAysén, Chile
    1253.0×
  18. 18LinaresMaule Region, Chile
    1243.0×
  19. 19SantiagoSantiago Metropolitan, Chile
    1233.0×
  20. 20IrapuatoGuanajuato, Mexico
    1222.9×
  21. 21RabinalBaja Verapaz, Guatemala
    1182.8×
  22. 22TalaganteSantiago Metropolitan, Chile
    1172.8×
  23. 23RengoO'Higgins Region, Chile
    1162.8×
  24. 24DushanbeDushanbe, Tajikistan
    1142.7×
  25. 25HualpénBiobio, Chile
    1112.6×
  26. 26RancaguaO'Higgins Region, Chile
    1112.6×
  27. 27Kampalalow-cost sensorsCentral Region, Uganda
    1102.6×
  28. 28QuinteroValparaiso, Chile
    1062.5×
  29. 29ShenyangLiaoning, China
    1062.5×
  30. 30CuranilahueBiobio, Chile
    1052.5×
  31. 31HyderabadTelangana, India
    1042.4×
  32. 32CelayaGuanajuato, Mexico
    1032.4×
  33. 33QuillotaValparaiso, Chile
    1002.4×
  34. 34BelmopanCayo District, Belize
    1002.4×
  35. 35NanNan, Thailand
    1002.3×
  36. 36Bang NaBangkok, Thailand
    992.3×
  37. 37Şabāḩ as SālimMubārak al Kabīr, Kuwait
    982.3×
  38. 38Khan Na YaoBangkok, Thailand
    982.3×
  39. 39SalamancaGuanajuato, Mexico
    982.3×
  40. 40Nakhon RatchasimaNakhon Ratchasima, Thailand
    972.3×
  41. 41JohannesburgGauteng, South Africa
    972.2×
  42. 42LampangLampang, Thailand
    962.2×
  43. 43ValdiviaLos Ríos Region, Chile
    952.2×
  44. 44KigaliKigali, Rwanda
    942.1×
  45. 45UttaraditUttaradit, Thailand
    922.1×
  46. 45PhraePhrae, Thailand
    922.1×
  47. 47TalcaMaule Region, Chile
    922.1×
  48. 48Prince AlbertSaskatchewan, Canada
    922.1×
  49. 49Mae SaiChiang Rai, Thailand
    912.1×
  50. 50Chiang RaiChiang Rai, Thailand
    912.0×
  51. 51Khlong Sam WaBangkok, Thailand
    912.0×
  52. 52PristinaPristina, Kosovo
    902.0×
  53. 53NacimientoBiobio, Chile
    902.0×
  54. 54León de los AldamaGuanajuato, Mexico
    902.0×
  55. 55Nong KhaemBangkok, Thailand
    902.0×
  56. 56Saphan SungBangkok, Thailand
    892.0×
  57. 57Si Maha PhotPrachin Buri, Thailand
    892.0×
  58. 57Lop BuriLopburi, Thailand
    892.0×
  59. 59PhetchabunPhetchabun, Thailand
    892.0×
  60. 60Bueng KumBangkok, Thailand
    881.9×
  61. 61RatchaburiRatchaburi, Thailand
    881.9×
  62. 62Puente AltoSantiago Metropolitan, Chile
    881.9×
  63. 63MielecSubcarpathia, Poland
    871.9×
  64. 63San CarlosÑuble, Chile
    871.9×
  65. 63CoquimboCoquimbo Region, Chile
    871.9×
  66. 66BakuBaki, Azerbaijan
    871.9×
  67. 67Fort McMurrayAlberta, Canada
    871.9×
  68. 67Lat KrabangBangkok, Thailand
    871.9×
  69. 69ChennaiTamil Nadu, India
    871.9×
  70. 70Jastrzębie ZdrójSilesia, Poland
    861.9×
  71. 71CoronelBiobio, Chile
    861.8×
  72. 72BangkokBangkok, Thailand
    851.8×
  73. 72Bang KapiBangkok, Thailand
    851.8×
  74. 74Kamphaeng PhetKamphaeng Phet, Thailand
    851.8×
  75. 75Port ArthurTexas, United States
    851.8×
  76. 76CauquenesMaule Region, Chile
    841.8×
  77. 77Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    841.8×
  78. 78HanoiHanoi, Vietnam
    841.8×
  79. 78Phra PradaengSamut Prakan, Thailand
    841.8×
  80. 80Ban Talat BuengChon Buri, Thailand
    831.8×
  81. 80TexarkanaTexas, United States
    831.8×
  82. 82ConcónValparaiso, Chile
    831.8×
  83. 83StilfonteinNorth West, South Africa
    831.7×
  84. 83Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    831.7×
  85. 83Bielsko-BialaSilesia, Poland
    831.7×
  86. 86Chiang MaiChiang Mai, Thailand
    831.7×
  87. 86Sing BuriSing Buri, Thailand
    831.7×
  88. 88KrakówLesser Poland, Poland
    821.7×
  89. 89Samut PrakanSamut Prakan, Thailand
    821.7×
  90. 90Khlong LuangPathum Thani, Thailand
    821.7×
  91. 91TocopillaAntofagasta, Chile
    821.7×
  92. 91Lak SiBangkok, Thailand
    821.7×
  93. 93SukhothaiSukhothai, Thailand
    821.7×
  94. 94Mae SotTak, Thailand
    811.7×
  95. 94Suphan BuriSuphan Buri, Thailand
    811.7×
  96. 94SulphurLouisiana, United States
    811.7×
  97. 97DębicaSubcarpathia, Poland
    811.7×
  98. 98Ban ChangRayong, Thailand
    801.7×
  99. 99Nong ChokBangkok, Thailand
    801.6×
  100. 100PrešovPrešov Region, Slovakia
    801.6×
  101. 100SaskatoonSaskatchewan, Canada
    801.6×
  102. 102KielceŚwiętokrzyskie, Poland
    801.6×
  103. 102Laem ChabangChon Buri, Thailand
    801.6×
  104. 104RayongRayong, Thailand
    801.6×
  105. 105Samut SakhonSamut Sakhon, Thailand
    791.6×
  106. 105Sai MaiBangkok, Thailand
    791.6×
  107. 107HumennéPrešov Region, Slovakia
    791.6×
  108. 107Nakhon PathomNakhon Pathom, Thailand
    791.6×
  109. 107Wan ChaiWan Chai, Hong Kong
    791.6×
  110. 107JacksonMississippi, United States
    791.6×
  111. 111LamphunLamphun, Thailand
    791.6×
  112. 111BogotáBogota D.C., Colombia
    791.6×
  113. 113EdmontonAlberta, Canada
    781.6×
  114. 114Viña del MarValparaiso, Chile
    781.6×
  115. 115SaraburiSaraburi, Thailand
    781.6×
  116. 115PhichitPhichit, Thailand
    781.6×
  117. 115BirminghamAlabama, United States
    781.6×
  118. 118AshgabatAshgabat, Turkmenistan
    781.6×
  119. 118LublinLublin, Poland
    781.6×
  120. 118TakTak, Thailand
    781.6×
  121. 121Udon ThaniUdon Thani, Thailand
    771.6×
  122. 122AntofagastaAntofagasta, Chile
    771.5×
  123. 123DurbanKwaZulu-Natal, South Africa
    771.5×
  124. 124CalgaryAlberta, Canada
    771.5×
  125. 125Mueang NonthaburiNonthaburi, Thailand
    771.5×
  126. 126CopiapóAtacama, Chile
    771.5×
  127. 127Alto HospicioTarapacá, Chile
    761.5×
  128. 127AirdrieAlberta, Canada
    761.5×
  129. 129KošiceKošice Region, Slovakia
    761.5×
  130. 129Ban Khlong PrawetBangkok, Thailand
    761.5×
  131. 131Chai NatChai Nat, Thailand
    761.5×
  132. 131East RidgeTennessee, United States
    761.5×
  133. 133AntananarivoAnalamanga, Madagascar
    761.5×
  134. 134RzeszówSubcarpathia, Poland
    751.5×
  135. 134Roi EtRoi Et, Thailand
    751.5×
  136. 134La SerenaCoquimbo Region, Chile
    751.5×
  137. 134HualquiBiobio, Chile
    751.5×
  138. 134GuanajuatoGuanajuato, Mexico
    751.5×
  139. 139RuseRuse, Bulgaria
    751.5×
  140. 139BaytownTexas, United States
    751.5×
  141. 139La PorteTexas, United States
    751.5×
  142. 142JeddahMecca Region, Saudi Arabia
    751.5×
  143. 142Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    751.5×
  144. 142PasadenaTexas, United States
    751.5×
  145. 145MiddelburgMpumalanga, South Africa
    751.5×
  146. 146Frýdek-MístekMoravian-Silesian Region, Czechia
    741.4×
  147. 146Silao de la VictoriaGuanajuato, Mexico
    741.4×
  148. 146HoustonTexas, United States
    741.4×
  149. 149Tha YangPhetchaburi, Thailand
    741.4×
  150. 149ChaiyaphumChaiyaphum, Thailand
    741.4×
  151. 151Nakhon SawanNakhon Sawan, Thailand
    741.4×
  152. 151Missouri CityTexas, United States
    741.4×
  153. 153Hua HinPrachuap Khiri Khan, Thailand
    741.4×
  154. 153ChanthaburiChanthaburi, Thailand
    741.4×
  155. 153PesaroThe Marches, Italy
    741.4×
  156. 153Red DeerAlberta, Canada
    741.4×
  157. 157KolkataWest Bengal, India
    731.4×
  158. 157TrnavaTrnava Region, Slovakia
    731.4×
  159. 159Si Sa KetSi Sa Ket, Thailand
    731.4×
  160. 159GuangzhouGuangdong, China
    731.4×
  161. 159MooreOklahoma, United States
    731.4×
  162. 162ConroeTexas, United States
    731.4×
  163. 162SaginawTexas, United States
    731.4×
  164. 164HavířovMoravian-Silesian Region, Czechia
    731.4×
  165. 164RacibórzSilesia, Poland
    731.4×
  166. 166HueytownAlabama, United States
    721.4×
  167. 167Baton RougeLouisiana, United States
    721.4×
  168. 168San Miguel de AllendeGuanajuato, Mexico
    721.4×
  169. 169VereenigingGauteng, South Africa
    721.4×
  170. 169DelhiDelhi, India
    721.4×
  171. 169AranyaprathetSa Kaeo, Thailand
    721.4×
  172. 169ChattanoogaTennessee, United States
    721.4×
  173. 173Czechowice-DziedziceSilesia, Poland
    721.3×
  174. 173CorsicanaTexas, United States
    721.3×
  175. 175Vranov nad TopľouPrešov Region, Slovakia
    711.3×
  176. 175ChillánÑuble, Chile
    711.3×
  177. 175ShreveportLouisiana, United States
    711.3×
  178. 175St. AlbertAlberta, Canada
    711.3×
  179. 179Spišská Nová VesKošice Region, Slovakia
    711.3×
  180. 179SenicaTrnava Region, Slovakia
    711.3×
  181. 179Fort WorthTexas, United States
    711.3×
  182. 179HobbsNew Mexico, United States
    711.3×
  183. 183Mission BendTexas, United States
    711.3×
  184. 184Ban HouakhouaBokeo, Laos
    711.3×
  185. 185Islamabadlow-cost sensorsIslamabad, Pakistan
    711.3×
  186. 185San Pedro de la PazBiobio, Chile
    711.3×
  187. 187AstanaAstana, Kazakhstan
    711.3×
  188. 187TřinecMoravian-Silesian Region, Czechia
    711.3×
  189. 189TalcahuanoBiobio, Chile
    701.3×
  190. 190AbasoloGuanajuato, Mexico
    701.3×
  191. 190GalvestonTexas, United States
    701.3×
  192. 192AricaArica y Parinacota Region, Chile
    701.3×
  193. 192SpringdaleArkansas, United States
    701.3×
  194. 192Oklahoma CityOklahoma, United States
    701.3×
  195. 195Addis AbabaAddis Ababa, Ethiopia
    701.3×
  196. 195SalorTashkent Region, Uzbekistan
    701.3×
  197. 195MartinŽilina Region, Slovakia
    701.3×
  198. 195OstravaMoravian-Silesian Region, Czechia
    701.3×
  199. 195San Luis de la PazGuanajuato, Mexico
    701.3×
  200. 200MukdahanMukdahan, Thailand
    691.3×

Top 200 of 1,559 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 26, 2023, smogrank.com/history/2023-05-26 (accessed 2 Oct 2026).

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