SmogRank / History / May 16, 2023

Most polluted cities on May 16, 2023

1,430 cities ranked by their average PM2.5 over the day; the worst was Ceglie Messapica, Italy, at 401.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during May 16, 2023. All episodes.

← Ceglie Messapica 401.0 µg/m³ 400 µg/m³15 WHO 24-hour guideline
Every city ranked for May 16, 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. 1Ceglie MessapicaApulia, Italy
    500+26.7×
  2. 2Grande PrairieAlberta, Canada
    36417.1×
  3. 3Prince AlbertSaskatchewan, Canada
    30415.1×
  4. 4Red DeerAlberta, Canada
    2109.0×
  5. 5Lahorelow-cost sensorsPunjab, Pakistan
    2078.8×
  6. 6DelhiDelhi, India
    2048.6×
  7. 7CalgaryAlberta, Canada
    1917.5×
  8. 8AirdrieAlberta, Canada
    1907.4×
  9. 9SaskatoonSaskatchewan, Canada
    1816.5×
  10. 10Prince GeorgeBritish Columbia, Canada
    1796.4×
  11. 11TlaquepaqueJalisco, Mexico
    1715.6×
  12. 12DushanbeDushanbe, Tajikistan
    1715.6×
  13. 13Dhakalow-cost sensorsDhaka Division, Bangladesh
    1634.8×
  14. 14HualquiBiobio, Chile
    1523.8×
  15. 15RancaguaO'Higgins Region, Chile
    1463.6×
  16. 16San CarlosÑuble, Chile
    1443.5×
  17. 17Fort McMurrayAlberta, Canada
    1443.5×
  18. 18CuricóMaule Region, Chile
    1383.4×
  19. 19Puerto VarasLos Lagos Region, Chile
    1373.4×
  20. 20BeijingBeijing, China
    1373.3×
  21. 21EdmontonAlberta, Canada
    1333.2×
  22. 22ChillánÑuble, Chile
    1313.2×
  23. 23Puente AltoSantiago Metropolitan, Chile
    1293.1×
  24. 24SantiagoSantiago Metropolitan, Chile
    1293.1×
  25. 25NacimientoBiobio, Chile
    1253.0×
  26. 26Fort St. JohnBritish Columbia, Canada
    1243.0×
  27. 27LinaresMaule Region, Chile
    1243.0×
  28. 28St. AlbertAlberta, Canada
    1233.0×
  29. 29AstanaAstana, Kazakhstan
    1233.0×
  30. 30TalaganteSantiago Metropolitan, Chile
    1212.9×
  31. 31HyderabadTelangana, India
    1152.8×
  32. 32Great FallsMontana, United States
    1152.7×
  33. 33JeddahMecca Region, Saudi Arabia
    1152.7×
  34. 34TocopillaAntofagasta, Chile
    1142.7×
  35. 35León de los AldamaGuanajuato, Mexico
    1132.7×
  36. 36JakartaJakarta, Indonesia
    1122.7×
  37. 37Islamabadlow-cost sensorsIslamabad, Pakistan
    1112.6×
  38. 38Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1082.6×
  39. 39ChennaiTamil Nadu, India
    1072.5×
  40. 40Los ÁngelesBiobio, Chile
    1062.5×
  41. 41Addis AbabaAddis Ababa, Ethiopia
    1052.5×
  42. 41Nong KhaemBangkok, Thailand
    1052.5×
  43. 43OsornoLos Lagos Region, Chile
    1042.5×
  44. 44Samut SakhonSamut Sakhon, Thailand
    1032.4×
  45. 44GuangzhouGuangdong, China
    1032.4×
  46. 46Kampalalow-cost sensorsCentral Region, Uganda
    1022.4×
  47. 47KolkataWest Bengal, India
    1002.3×
  48. 48SalorTashkent Region, Uzbekistan
    992.3×
  49. 49Phra PradaengSamut Prakan, Thailand
    982.3×
  50. 50CelayaGuanajuato, Mexico
    972.2×
  51. 51HanoiHanoi, Vietnam
    962.2×
  52. 52La UniónLos Ríos Region, Chile
    952.2×
  53. 53LethbridgeAlberta, Canada
    942.1×
  54. 54Puerto MonttLos Lagos Region, Chile
    932.1×
  55. 55BangkokBangkok, Thailand
    932.1×
  56. 56CuranilahueBiobio, Chile
    922.1×
  57. 57Sherwood ParkAlberta, Canada
    912.1×
  58. 58Nakhon PathomNakhon Pathom, Thailand
    902.0×
  59. 58Khlong LuangPathum Thani, Thailand
    902.0×
  60. 60RabinalBaja Verapaz, Guatemala
    902.0×
  61. 60Guatemala CityGuatemala, Guatemala
    902.0×
  62. 62Kathmandulow-cost sensorsBagmati Province, Nepal
    881.9×
  63. 63ManamaManama, Bahrain
    881.9×
  64. 63CoyhaiqueAysén, Chile
    881.9×
  65. 65CauquenesMaule Region, Chile
    881.9×
  66. 66Mueang NonthaburiNonthaburi, Thailand
    881.9×
  67. 67Samut PrakanSamut Prakan, Thailand
    871.9×
  68. 68PristinaPristina, Kosovo
    871.9×
  69. 68BrandonManitoba, Canada
    871.9×
  70. 70Hacienda Santa FeJalisco, Mexico
    861.9×
  71. 71Bang KapiBangkok, Thailand
    851.8×
  72. 72West FargoNorth Dakota, United States
    851.8×
  73. 73LotaBiobio, Chile
    831.7×
  74. 74ValdiviaLos Ríos Region, Chile
    821.7×
  75. 75Tha BoNong Khai, Thailand
    821.7×
  76. 75CoronelBiobio, Chile
    821.7×
  77. 77Puerto AysénAysén, Chile
    821.7×
  78. 78BaghdadBaghdad, Iraq
    811.7×
  79. 79Silao de la VictoriaGuanajuato, Mexico
    811.7×
  80. 80AntananarivoAnalamanga, Madagascar
    801.7×
  81. 80Swift CurrentSaskatchewan, Canada
    801.7×
  82. 82Bang Bo DistrictSamut Prakan, Thailand
    791.6×
  83. 83Naucalpan de JuárezMéxico, Mexico
    791.6×
  84. 84AthensAttica, Greece
    791.6×
  85. 85Jelenia GóraLower Silesia, Poland
    791.6×
  86. 86QuinteroValparaiso, Chile
    781.6×
  87. 87TalcaMaule Region, Chile
    771.5×
  88. 88SalamancaGuanajuato, Mexico
    771.5×
  89. 88West MifflinPennsylvania, United States
    771.5×
  90. 90AntofagastaAntofagasta, Chile
    771.5×
  91. 91QuillotaValparaiso, Chile
    761.5×
  92. 92Jastrzębie ZdrójSilesia, Poland
    761.5×
  93. 93Şabāḩ as SālimMubārak al Kabīr, Kuwait
    751.5×
  94. 94Viña del MarValparaiso, Chile
    741.4×
  95. 95CoquimboCoquimbo Region, Chile
    741.4×
  96. 96FontanaCalifornia, United States
    731.4×
  97. 97La SerenaCoquimbo Region, Chile
    731.4×
  98. 98Haskovolow-cost sensorsHaskovo, Bulgaria
    731.4×
  99. 98Mexico CityMexico City, Mexico
    731.4×
  100. 100AsprópyrgosAttica, Greece
    731.4×
  101. 100ToméBiobio, Chile
    731.4×
  102. 100Alto HospicioTarapacá, Chile
    731.4×
  103. 103TemucoAraucania, Chile
    721.4×
  104. 104ChiguayanteBiobio, Chile
    721.4×
  105. 105PesaroThe Marches, Italy
    711.3×
  106. 106Botevgradlow-cost sensorsSofia, Bulgaria
    711.3×
  107. 106NišCentral Serbia, Serbia
    711.3×
  108. 106ConcónValparaiso, Chile
    711.3×
  109. 109AcharnésAttica, Greece
    711.3×
  110. 109AricaArica y Parinacota Region, Chile
    711.3×
  111. 111TalcahuanoBiobio, Chile
    701.3×
  112. 112LiberecLiberec Region, Czechia
    701.3×
  113. 112Český TěšínMoravian-Silesian Region, Czechia
    701.3×
  114. 112Jurupa ValleyCalifornia, United States
    701.3×
  115. 115GuanajuatoGuanajuato, Mexico
    691.3×
  116. 116RacibórzSilesia, Poland
    691.3×
  117. 116CopiapóAtacama, Chile
    691.3×
  118. 118RiversideCalifornia, United States
    691.2×
  119. 119CalamaAntofagasta, Chile
    691.2×
  120. 120Karachilow-cost sensorsSindh, Pakistan
    691.2×
  121. 121ReginaSaskatchewan, Canada
    681.2×
  122. 122BanningCalifornia, United States
    681.2×
  123. 123MumbaiMaharashtra, India
    671.2×
  124. 123YangonYangon, Myanmar
    671.2×
  125. 123Novi SadVojvodina, Serbia
    671.2×
  126. 126KaliszGreater Poland, Poland
    671.2×
  127. 127UmeåVästerbotten, Sweden
    671.2×
  128. 127LinzUpper Austria, Austria
    671.2×
  129. 127WrocławLower Silesia, Poland
    671.2×
  130. 127AbasoloGuanajuato, Mexico
    671.2×
  131. 127San Pedro de la PazBiobio, Chile
    671.2×
  132. 132SofiaSofia-Capital, Bulgaria
    661.2×
  133. 133Ciudad JuárezChihuahua, Mexico
    661.2×
  134. 134SundsvallVästernorrland, Sweden
    661.1×
  135. 135Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    661.1×
  136. 135ParadiseCalifornia, United States
    661.1×
  137. 137ConakryConakry, Guinea
    661.1×
  138. 138ConcepciónBiobio, Chile
    651.1×
  139. 139DěčínÚstí nad Labem Region, Czechia
    651.1×
  140. 140PiraeusAttica, Greece
    651.1×
  141. 140AnsfeldenUpper Austria, Austria
    651.1×
  142. 142Lagoslow-cost sensorsLagos, Nigeria
    651.1×
  143. 142KladnoCentral Bohemia, Czechia
    651.1×
  144. 142KłodzkoLower Silesia, Poland
    651.1×
  145. 145Almatylow-cost sensorsAlmaty, Kazakhstan
    641.1×
  146. 145Mladá BoleslavCentral Bohemia, Czechia
    641.1×
  147. 147BelgradeCentral Serbia, Serbia
    641.1×
  148. 147São PauloSão Paulo, Brazil
    641.1×
  149. 149KadaňÚstí nad Labem Region, Czechia
    641.1×
  150. 150KościanGreater Poland, Poland
    641.1×
  151. 151ClaytonNorth Carolina, United States
    641.1×
  152. 152BakuBaki, Azerbaijan
    631.1×
  153. 153PardubicePardubice Region, Czechia
    621.0×
  154. 153TijuanaBaja California, Mexico
    621.0×
  155. 153PhiladelphiaPennsylvania, United States
    621.0×
  156. 156OpavaMoravian-Silesian Region, Czechia
    621.0×
  157. 157NorrtäljeStockholm, Sweden
    621.0×
  158. 157IndioCalifornia, United States
    621.0×
  159. 159ColomboWestern Province, Sri Lanka
    621.0×
  160. 159KatowiceSilesia, Poland
    621.0×
  161. 161KhalándrionAttica, Greece
    621.0×
  162. 161San Miguel de AllendeGuanajuato, Mexico
    621.0×
  163. 161GainesvilleGeorgia, United States
    621.0×
  164. 164Cluj-NapocaCluj County, Romania
    611.0×
  165. 164Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    611.0×
  166. 164AugustaGeorgia, United States
    611.0×
  167. 164AnaheimCalifornia, United States
    611.0×
  168. 168PylaíaCentral Macedonia, Greece
    611.0×
  169. 168HavířovMoravian-Silesian Region, Czechia
    611.0×
  170. 170ElizabethNew Jersey, United States
    610.9×
  171. 171TepliceÚstí nad Labem Region, Czechia
    600.9×
  172. 171OlomoucOlomouc Region, Czechia
    600.9×
  173. 171Hradec KrálovéHradec Králové Region, Czechia
    600.9×
  174. 171Saint CloudMinnesota, United States
    600.9×
  175. 175GrajewoPodlasie, Poland
    600.9×
  176. 175HobbsNew Mexico, United States
    600.9×
  177. 177TraunUpper Austria, Austria
    600.9×
  178. 177LitvínovÚstí nad Labem Region, Czechia
    600.9×
  179. 179BrawleyCalifornia, United States
    600.9×
  180. 180BerounCentral Bohemia, Czechia
    600.9×
  181. 180GlendoraCalifornia, United States
    600.9×
  182. 180HelenaMontana, United States
    600.9×
  183. 183SliemaTas-Sliema, Malta
    590.9×
  184. 183Ústí nad LabemÚstí nad Labem Region, Czechia
    590.9×
  185. 185RuseRuse, Bulgaria
    590.9×
  186. 185IrapuatoGuanajuato, Mexico
    590.9×
  187. 185RedfordMichigan, United States
    590.9×
  188. 185CantonOhio, United States
    590.9×
  189. 189MostÚstí nad Labem Region, Czechia
    590.9×
  190. 190Lincoln ParkMichigan, United States
    590.9×
  191. 190Santa ClaritaCalifornia, United States
    590.9×
  192. 192Banja LukaSrpska, Bosnia and Herzegovina
    590.9×
  193. 192Lake ElsinoreCalifornia, United States
    590.9×
  194. 194StuttgartBaden-Wurttemberg, Germany
    580.9×
  195. 194WłocławekKujawsko-Pomorskie, Poland
    580.9×
  196. 194AthensGeorgia, United States
    580.9×
  197. 197BakersfieldCalifornia, United States
    580.9×
  198. 197LiberpolisCounty of Osijek-Baranja, Croatia
    580.9×
  199. 199Sevlievolow-cost sensorsGabrovo, Bulgaria
    580.9×
  200. 199MielecSubcarpathia, Poland
    580.9×

Top 200 of 1,430 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 16, 2023, smogrank.com/history/2023-05-16 (accessed 2 Oct 2026).

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