SmogRank / History / May 5, 2023

Most polluted cities on May 5, 2023

1,485 cities ranked by their average PM2.5 over the day; the worst was Osorno, Chile, at 91.4 µg/m³. Each city's own local calendar day.

Bad-air episodes during May 5, 2023. All episodes.

← Osorno 91.4 µg/m³ 90 µg/m³15 WHO 24-hour guideline
Every city ranked for May 5, 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. 1OsornoLos Lagos Region, Chile
    1766.1×
  2. 2Puerto VarasLos Lagos Region, Chile
    1675.2×
  3. 3Grande PrairieAlberta, Canada
    1665.2×
  4. 4Puerto MonttLos Lagos Region, Chile
    1624.7×
  5. 5ValdiviaLos Ríos Region, Chile
    1604.5×
  6. 6DelhiDelhi, India
    1594.5×
  7. 7Fort St. JohnBritish Columbia, Canada
    1594.4×
  8. 8RancaguaO'Higgins Region, Chile
    1574.3×
  9. 9NanNan, Thailand
    1574.2×
  10. 10SantiagoSantiago Metropolitan, Chile
    1544.0×
  11. 11La UniónLos Ríos Region, Chile
    1544.0×
  12. 12Dhakalow-cost sensorsDhaka Division, Bangladesh
    1533.9×
  13. 13Lahorelow-cost sensorsPunjab, Pakistan
    1533.9×
  14. 14TalaganteSantiago Metropolitan, Chile
    1513.7×
  15. 15Puente AltoSantiago Metropolitan, Chile
    1503.7×
  16. 16DushanbeDushanbe, Tajikistan
    1453.6×
  17. 17BloemfonteinFree State, South Africa
    1453.6×
  18. 18HualpénBiobio, Chile
    1443.5×
  19. 19RengoO'Higgins Region, Chile
    1423.5×
  20. 20CelayaGuanajuato, Mexico
    1413.5×
  21. 21CuricóMaule Region, Chile
    1393.4×
  22. 21CoronelBiobio, Chile
    1393.4×
  23. 23Ubon RatchathaniUbon Ratchathani, Thailand
    1373.3×
  24. 24PhayaoPhayao, Thailand
    1363.3×
  25. 25UttaraditUttaradit, Thailand
    1343.3×
  26. 25MukdahanMukdahan, Thailand
    1343.3×
  27. 27HualquiBiobio, Chile
    1313.2×
  28. 28PhraePhrae, Thailand
    1303.2×
  29. 29San CarlosÑuble, Chile
    1293.1×
  30. 30LinaresMaule Region, Chile
    1283.1×
  31. 31Kathmandulow-cost sensorsBagmati Province, Nepal
    1243.0×
  32. 32Silao de la VictoriaGuanajuato, Mexico
    1233.0×
  33. 33LampangLampang, Thailand
    1233.0×
  34. 34QuillotaValparaiso, Chile
    1222.9×
  35. 35ChillánÑuble, Chile
    1202.9×
  36. 36KigaliKigali, Rwanda
    1192.8×
  37. 37TalcaMaule Region, Chile
    1182.8×
  38. 37SalamancaGuanajuato, Mexico
    1182.8×
  39. 39NacimientoBiobio, Chile
    1172.8×
  40. 40ToméBiobio, Chile
    1162.8×
  41. 41GuanajuatoGuanajuato, Mexico
    1152.8×
  42. 42JakartaJakarta, Indonesia
    1152.7×
  43. 43ChiguayanteBiobio, Chile
    1142.7×
  44. 44LoeiLoei, Thailand
    1142.7×
  45. 45Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1132.7×
  46. 46Ga-RankuwaNorth West, South Africa
    1122.7×
  47. 46Guatemala CityGuatemala, Guatemala
    1122.7×
  48. 48RabinalBaja Verapaz, Guatemala
    1122.7×
  49. 49León de los AldamaGuanajuato, Mexico
    1112.6×
  50. 50KalasinKalasin, Thailand
    1112.6×
  51. 51AbasoloGuanajuato, Mexico
    1102.6×
  52. 52LamphunLamphun, Thailand
    1102.6×
  53. 52HanoiHanoi, Vietnam
    1102.6×
  54. 54Tha BoNong Khai, Thailand
    1092.6×
  55. 55ObrenovacCentral Serbia, Serbia
    1092.6×
  56. 55Mexico CityMexico City, Mexico
    1092.6×
  57. 57IrapuatoGuanajuato, Mexico
    1062.5×
  58. 58PhichitPhichit, Thailand
    1052.5×
  59. 59Chiang MaiChiang Mai, Thailand
    1042.5×
  60. 60TalcahuanoBiobio, Chile
    1042.4×
  61. 61PakxanBolikhamsai, Laos
    1032.4×
  62. 61Naucalpan de JuárezMéxico, Mexico
    1032.4×
  63. 63SukhothaiSukhothai, Thailand
    992.3×
  64. 64ConcepciónBiobio, Chile
    992.3×
  65. 65PhetchabunPhetchabun, Thailand
    992.3×
  66. 66LazarevacCentral Serbia, Serbia
    982.3×
  67. 67CauquenesMaule Region, Chile
    972.3×
  68. 68Suphan BuriSuphan Buri, Thailand
    972.2×
  69. 69Roi EtRoi Et, Thailand
    962.2×
  70. 70San Miguel de AllendeGuanajuato, Mexico
    952.2×
  71. 71Addis AbabaAddis Ababa, Ethiopia
    942.2×
  72. 71Udon ThaniUdon Thani, Thailand
    942.2×
  73. 73Fort McMurrayAlberta, Canada
    942.1×
  74. 74Mae SaiChiang Rai, Thailand
    942.1×
  75. 75QuinteroValparaiso, Chile
    932.1×
  76. 76Viña del MarValparaiso, Chile
    922.1×
  77. 77Mae SotTak, Thailand
    922.1×
  78. 78YangonYangon, Myanmar
    912.0×
  79. 78LaredoTexas, United States
    912.0×
  80. 80Si Sa KetSi Sa Ket, Thailand
    912.0×
  81. 81ConcónValparaiso, Chile
    902.0×
  82. 82Khon KaenKhon Kaen, Thailand
    902.0×
  83. 83Nong Bua LamphuNong Bua Lamphu, Thailand
    892.0×
  84. 84Sakon NakhonSakon Nakhon, Thailand
    892.0×
  85. 85ConakryConakry, Guinea
    892.0×
  86. 86EdinburgTexas, United States
    881.9×
  87. 87Islamabadlow-cost sensorsIslamabad, Pakistan
    871.9×
  88. 87LotaBiobio, Chile
    871.9×
  89. 89Ban HouakhouaBokeo, Laos
    871.9×
  90. 90Lop BuriLopburi, Thailand
    871.9×
  91. 90Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    871.9×
  92. 92CoyhaiqueAysén, Chile
    861.9×
  93. 93CoquimboCoquimbo Region, Chile
    861.9×
  94. 94Kamphaeng PhetKamphaeng Phet, Thailand
    861.9×
  95. 95San Luis de la PazGuanajuato, Mexico
    851.8×
  96. 96PristinaPristina, Kosovo
    851.8×
  97. 96MaspalomasCanary Islands, Spain
    851.8×
  98. 98NaplesCampania, Italy
    841.8×
  99. 99San Pedro de la PazBiobio, Chile
    841.8×
  100. 100ValjevoCentral Serbia, Serbia
    831.8×
  101. 101TakTak, Thailand
    831.8×
  102. 102Chai NatChai Nat, Thailand
    821.7×
  103. 102La SerenaCoquimbo Region, Chile
    821.7×
  104. 104Karachilow-cost sensorsSindh, Pakistan
    821.7×
  105. 105Chiang RaiChiang Rai, Thailand
    821.7×
  106. 106AstanaAstana, Kazakhstan
    811.7×
  107. 106Nakhon SawanNakhon Sawan, Thailand
    811.7×
  108. 106Corpus ChristiTexas, United States
    811.7×
  109. 109ThembisaGauteng, South Africa
    811.7×
  110. 109AustinTexas, United States
    811.7×
  111. 111ChaiyaphumChaiyaphum, Thailand
    811.7×
  112. 112Si Maha PhotPrachin Buri, Thailand
    811.7×
  113. 113ZemunCentral Serbia, Serbia
    801.7×
  114. 113Sing BuriSing Buri, Thailand
    801.7×
  115. 115Bang NaBangkok, Thailand
    801.6×
  116. 115TemucoAraucania, Chile
    801.6×
  117. 117Nakhon RatchasimaNakhon Ratchasima, Thailand
    801.6×
  118. 118Ulu BedokSingapore
    781.6×
  119. 119ManamaManama, Bahrain
    781.6×
  120. 119BelmopanCayo District, Belize
    781.6×
  121. 121Buri RamBuriram, Thailand
    771.5×
  122. 122ČačakCentral Serbia, Serbia
    771.5×
  123. 122ColomboWestern Province, Sri Lanka
    771.5×
  124. 124BaghdadBaghdad, Iraq
    771.5×
  125. 124AntofagastaAntofagasta, Chile
    771.5×
  126. 124Khlong Sam WaBangkok, Thailand
    771.5×
  127. 127KragujevacCentral Serbia, Serbia
    761.5×
  128. 128Novi PazarCentral Serbia, Serbia
    761.5×
  129. 128San AntonioTexas, United States
    761.5×
  130. 130SmederevoCentral Serbia, Serbia
    761.5×
  131. 131WłocławekKujawsko-Pomorskie, Poland
    751.5×
  132. 132Jastrzębie ZdrójSilesia, Poland
    751.5×
  133. 132Puerto AysénAysén, Chile
    751.5×
  134. 134BakuBaki, Azerbaijan
    731.4×
  135. 135Mission BendTexas, United States
    731.4×
  136. 136BelgradeCentral Serbia, Serbia
    731.4×
  137. 136CopiapóAtacama, Chile
    731.4×
  138. 136Missouri CityTexas, United States
    731.4×
  139. 139HoustonTexas, United States
    731.4×
  140. 140RatchaburiRatchaburi, Thailand
    721.4×
  141. 141PančevoVojvodina, Serbia
    721.4×
  142. 141TexarkanaTexas, United States
    721.4×
  143. 143GuangzhouGuangdong, China
    721.4×
  144. 143Lagoslow-cost sensorsLagos, Nigeria
    721.4×
  145. 143AricaArica y Parinacota Region, Chile
    721.4×
  146. 143Eagle PassTexas, United States
    721.4×
  147. 147BaytownTexas, United States
    711.3×
  148. 148PasadenaTexas, United States
    711.3×
  149. 149ShenyangLiaoning, China
    701.3×
  150. 150Nong KhaemBangkok, Thailand
    701.3×
  151. 150ConroeTexas, United States
    701.3×
  152. 152Saphan SungBangkok, Thailand
    701.3×
  153. 153SalorTashkent Region, Uzbekistan
    691.3×
  154. 153Laem ChabangChon Buri, Thailand
    691.3×
  155. 155Hat YaiSongkhla, Thailand
    691.3×
  156. 156MumbaiMaharashtra, India
    691.2×
  157. 156Khan Na YaoBangkok, Thailand
    691.2×
  158. 158ĆuprijaCentral Serbia, Serbia
    691.2×
  159. 158CuranilahueBiobio, Chile
    691.2×
  160. 160AntananarivoAnalamanga, Madagascar
    681.2×
  161. 160Ban Samae DamBangkok, Thailand
    681.2×
  162. 160KadaňÚstí nad Labem Region, Czechia
    681.2×
  163. 160RacibórzSilesia, Poland
    681.2×
  164. 160College StationTexas, United States
    681.2×
  165. 165JohannesburgGauteng, South Africa
    681.2×
  166. 166Khlong LuangPathum Thani, Thailand
    681.2×
  167. 166TrnavaTrnava Region, Slovakia
    681.2×
  168. 168SenicaTrnava Region, Slovakia
    681.2×
  169. 168RichmondCalifornia, United States
    681.2×
  170. 170Samut PrakanSamut Prakan, Thailand
    681.2×
  171. 170Los ÁngelesBiobio, Chile
    681.2×
  172. 170McKeesportPennsylvania, United States
    681.2×
  173. 173PirotCentral Serbia, Serbia
    671.2×
  174. 173Bang Bo DistrictSamut Prakan, Thailand
    671.2×
  175. 173DěčínÚstí nad Labem Region, Czechia
    671.2×
  176. 173Novi SadVojvodina, Serbia
    671.2×
  177. 177Ciudad JuárezChihuahua, Mexico
    671.2×
  178. 177Lak SiBangkok, Thailand
    671.2×
  179. 179KanchanaburiKanchanaburi, Thailand
    661.2×
  180. 179Nong ChokBangkok, Thailand
    661.2×
  181. 181Hua HinPrachuap Khiri Khan, Thailand
    661.1×
  182. 181HyderabadTelangana, India
    661.1×
  183. 183SremčicaCentral Serbia, Serbia
    651.1×
  184. 183NišCentral Serbia, Serbia
    651.1×
  185. 183CalamaAntofagasta, Chile
    651.1×
  186. 183Lat KrabangBangkok, Thailand
    651.1×
  187. 187Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    651.1×
  188. 187OstravaMoravian-Silesian Region, Czechia
    651.1×
  189. 189BarnsleyEngland, United Kingdom
    651.1×
  190. 189LitvínovÚstí nad Labem Region, Czechia
    651.1×
  191. 189Bielsko-BialaSilesia, Poland
    651.1×
  192. 189BeltonTexas, United States
    651.1×
  193. 193BangkokBangkok, Thailand
    651.1×
  194. 194Bang KapiBangkok, Thailand
    641.1×
  195. 194HavířovMoravian-Silesian Region, Czechia
    641.1×
  196. 196Ban Talat BuengChon Buri, Thailand
    641.1×
  197. 196Bueng KumBangkok, Thailand
    641.1×
  198. 198BeijingBeijing, China
    641.1×
  199. 198Queenstown Estatelow-cost sensorsSingapore
    641.1×
  200. 198MostÚstí nad Labem Region, Czechia
    641.1×

Top 200 of 1,485 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 5, 2023, smogrank.com/history/2023-05-05 (accessed 2 Oct 2026).

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