SmogRank / History / May 28, 2023

Most polluted cities on May 28, 2023

1,457 cities ranked by their average PM2.5 over the day; the worst was San Carlos, Chile, at 128.0 µg/m³. Each city's own local calendar day.

← San Carlos 128.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for May 28, 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 CarlosÑuble, Chile
    2038.5×
  2. 2HualpénBiobio, Chile
    1917.5×
  3. 3NacimientoBiobio, Chile
    1887.2×
  4. 4ChillánÑuble, Chile
    1836.7×
  5. 5OsornoLos Lagos Region, Chile
    1816.5×
  6. 6CuricóMaule Region, Chile
    1816.5×
  7. 7Dhakalow-cost sensorsDhaka Division, Bangladesh
    1735.7×
  8. 8TemucoAraucania, Chile
    1685.3×
  9. 9LinaresMaule Region, Chile
    1675.2×
  10. 10MálagaAndalusia, Spain
    1624.7×
  11. 11Puerto VarasLos Lagos Region, Chile
    1594.5×
  12. 12BaghdadBaghdad, Iraq
    1594.5×
  13. 13SantiagoSantiago Metropolitan, Chile
    1564.2×
  14. 14TalcahuanoBiobio, Chile
    1564.1×
  15. 15RancaguaO'Higgins Region, Chile
    1554.1×
  16. 16Puerto AysénAysén, Chile
    1554.1×
  17. 17CoronelBiobio, Chile
    1544.0×
  18. 18CuranilahueBiobio, Chile
    1544.0×
  19. 19La UniónLos Ríos Region, Chile
    1533.9×
  20. 20Los ÁngelesBiobio, Chile
    1513.7×
  21. 21HualquiBiobio, Chile
    1483.6×
  22. 22TalaganteSantiago Metropolitan, Chile
    1473.6×
  23. 23Puente AltoSantiago Metropolitan, Chile
    1463.6×
  24. 24Lahorelow-cost sensorsPunjab, Pakistan
    1443.5×
  25. 25Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1443.5×
  26. 25RengoO'Higgins Region, Chile
    1443.5×
  27. 27Puerto MonttLos Lagos Region, Chile
    1373.3×
  28. 28HyderabadTelangana, India
    1333.2×
  29. 29ToméBiobio, Chile
    1323.2×
  30. 30CoyhaiqueAysén, Chile
    1293.1×
  31. 31RabinalBaja Verapaz, Guatemala
    1182.8×
  32. 32Guatemala CityGuatemala, Guatemala
    1182.8×
  33. 33CauquenesMaule Region, Chile
    1162.8×
  34. 34ChiguayanteBiobio, Chile
    1152.8×
  35. 35KigaliKigali, Rwanda
    1132.7×
  36. 35San Pedro de la PazBiobio, Chile
    1132.7×
  37. 37QuillotaValparaiso, Chile
    1122.7×
  38. 38BeijingBeijing, China
    1122.7×
  39. 39DelhiDelhi, India
    1112.6×
  40. 40KolkataWest Bengal, India
    1112.6×
  41. 41Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1112.6×
  42. 42ConcepciónBiobio, Chile
    1092.6×
  43. 43Ga-RankuwaNorth West, South Africa
    1052.5×
  44. 43ShenyangLiaoning, China
    1052.5×
  45. 45Islamabadlow-cost sensorsIslamabad, Pakistan
    1042.5×
  46. 46TalcaMaule Region, Chile
    1022.4×
  47. 47DushanbeDushanbe, Tajikistan
    1022.4×
  48. 48CelayaGuanajuato, Mexico
    952.2×
  49. 49BritsNorth West, South Africa
    912.1×
  50. 50BloemfonteinFree State, South Africa
    902.0×
  51. 51SalamancaGuanajuato, Mexico
    902.0×
  52. 52ChennaiTamil Nadu, India
    902.0×
  53. 53Kampalalow-cost sensorsCentral Region, Uganda
    892.0×
  54. 54PristinaPristina, Kosovo
    871.9×
  55. 55Nong KhaemBangkok, Thailand
    861.9×
  56. 55CopiapóAtacama, Chile
    861.9×
  57. 57QuinteroValparaiso, Chile
    851.8×
  58. 58ValdiviaLos Ríos Region, Chile
    851.8×
  59. 59BakuBaki, Azerbaijan
    841.8×
  60. 59LotaBiobio, Chile
    841.8×
  61. 61La SerenaCoquimbo Region, Chile
    841.8×
  62. 62GuangzhouGuangdong, China
    841.8×
  63. 62CoquimboCoquimbo Region, Chile
    841.8×
  64. 64SasolburgFree State, South Africa
    841.8×
  65. 65AntofagastaAntofagasta, Chile
    821.7×
  66. 66Samut SakhonSamut Sakhon, Thailand
    821.7×
  67. 67ConcónValparaiso, Chile
    811.7×
  68. 68BelmopanCayo District, Belize
    801.6×
  69. 69JeddahMecca Region, Saudi Arabia
    801.6×
  70. 69Viña del MarValparaiso, Chile
    801.6×
  71. 71León de los AldamaGuanajuato, Mexico
    801.6×
  72. 72CalamaAntofagasta, Chile
    791.6×
  73. 73Phra PradaengSamut Prakan, Thailand
    771.5×
  74. 73BangkokBangkok, Thailand
    771.5×
  75. 75RuseRuse, Bulgaria
    761.5×
  76. 76AshgabatAshgabat, Turkmenistan
    751.5×
  77. 77Bang Bo DistrictSamut Prakan, Thailand
    751.5×
  78. 78Fort WorthTexas, United States
    741.4×
  79. 79BéthuneHauts-de-France, France
    741.4×
  80. 79AricaArica y Parinacota Region, Chile
    741.4×
  81. 81YangonYangon, Myanmar
    731.4×
  82. 82TocopillaAntofagasta, Chile
    731.4×
  83. 83PesaroThe Marches, Italy
    731.4×
  84. 84SremčicaCentral Serbia, Serbia
    721.4×
  85. 84Alto HospicioTarapacá, Chile
    721.4×
  86. 84Silao de la VictoriaGuanajuato, Mexico
    721.4×
  87. 87Ecatepec de MorelosMéxico, Mexico
    711.3×
  88. 87HernandoMississippi, United States
    711.3×
  89. 89GuanajuatoGuanajuato, Mexico
    711.3×
  90. 90ConroeTexas, United States
    711.3×
  91. 91Samut PrakanSamut Prakan, Thailand
    711.3×
  92. 91les EscaldesEscaldes-Engordany, Andorra
    711.3×
  93. 93Lincoln ParkMichigan, United States
    701.3×
  94. 94LazarevacCentral Serbia, Serbia
    701.3×
  95. 94HanoiHanoi, Vietnam
    701.3×
  96. 94CorsicanaTexas, United States
    701.3×
  97. 94HamiltonOntario, Canada
    701.3×
  98. 98Nakhon PathomNakhon Pathom, Thailand
    701.3×
  99. 99Bang KapiBangkok, Thailand
    701.3×
  100. 99HobbsNew Mexico, United States
    701.3×
  101. 101CaenNormandy, France
    691.3×
  102. 101GijónAsturias, Spain
    691.3×
  103. 103KragujevacCentral Serbia, Serbia
    691.2×
  104. 103BilbaoBasque Country, Spain
    691.2×
  105. 103JacksonMississippi, United States
    691.2×
  106. 103TaylorMichigan, United States
    691.2×
  107. 107SmederevoCentral Serbia, Serbia
    691.2×
  108. 107LilleHauts-de-France, France
    691.2×
  109. 109Gasteiz / VitoriaBasque Country, Spain
    681.2×
  110. 109TexarkanaTexas, United States
    681.2×
  111. 111São PauloSão Paulo, Brazil
    681.2×
  112. 112DallasTexas, United States
    681.2×
  113. 112KalamazooMichigan, United States
    681.2×
  114. 112RedfordMichigan, United States
    681.2×
  115. 115DieppeNormandy, France
    681.2×
  116. 115HoustonTexas, United States
    681.2×
  117. 117Laudio / LlodioBasque Country, Spain
    671.2×
  118. 118Mexico CityMexico City, Mexico
    671.2×
  119. 119Le HavreNormandy, France
    671.2×
  120. 119VigoGalicia, Spain
    671.2×
  121. 121Khlong LuangPathum Thani, Thailand
    671.2×
  122. 121DurangoBasque Country, Spain
    671.2×
  123. 121ValjevoCentral Serbia, Serbia
    671.2×
  124. 121DentonTexas, United States
    671.2×
  125. 125BeauvaisHauts-de-France, France
    661.2×
  126. 125EdmontonAlberta, Canada
    661.2×
  127. 127Kathmandulow-cost sensorsBagmati Province, Nepal
    661.2×
  128. 128Novi PazarCentral Serbia, Serbia
    661.1×
  129. 128BaytownTexas, United States
    661.1×
  130. 130Mueang NonthaburiNonthaburi, Thailand
    661.1×
  131. 131AlessandriaPiedmont, Italy
    661.1×
  132. 131San Miguel de AllendeGuanajuato, Mexico
    661.1×
  133. 133NišCentral Serbia, Serbia
    661.1×
  134. 133EdmondOklahoma, United States
    661.1×
  135. 133MooreOklahoma, United States
    661.1×
  136. 136AmiensHauts-de-France, France
    651.1×
  137. 137KortrijkFlanders, Belgium
    651.1×
  138. 137RoubaixHauts-de-France, France
    651.1×
  139. 137UžiceCentral Serbia, Serbia
    651.1×
  140. 137Little RockArkansas, United States
    651.1×
  141. 141DunkirkHauts-de-France, France
    651.1×
  142. 141DerbyKansas, United States
    651.1×
  143. 141Oklahoma CityOklahoma, United States
    651.1×
  144. 144AbasoloGuanajuato, Mexico
    651.1×
  145. 145RoeselareFlanders, Belgium
    651.1×
  146. 145Falconara MarittimaThe Marches, Italy
    651.1×
  147. 145WichitaKansas, United States
    651.1×
  148. 145Ponca CityOklahoma, United States
    651.1×
  149. 149MiddletownOhio, United States
    641.1×
  150. 150ČačakCentral Serbia, Serbia
    641.1×
  151. 150PerpignanOccitanie, France
    641.1×
  152. 150PasadenaTexas, United States
    641.1×
  153. 153IzegemFlanders, Belgium
    641.1×
  154. 154MenenFlanders, Belgium
    641.1×
  155. 154Donostia / San SebastiánBasque Country, Spain
    641.1×
  156. 154A CoruñaGalicia, Spain
    641.1×
  157. 157EvergemFlanders, Belgium
    641.1×
  158. 157San Luis de la PazGuanajuato, Mexico
    641.1×
  159. 157HattiesburgMississippi, United States
    641.1×
  160. 160BelgradeCentral Serbia, Serbia
    631.1×
  161. 160SliemaTas-Sliema, Malta
    631.1×
  162. 160KoksijdeFlanders, Belgium
    631.1×
  163. 160DaxNew Aquitaine, France
    631.1×
  164. 160Missouri CityTexas, United States
    631.1×
  165. 165PančevoVojvodina, Serbia
    631.0×
  166. 165Saint-BrieucBrittany, France
    631.0×
  167. 165JesiThe Marches, Italy
    631.0×
  168. 165College StationTexas, United States
    631.0×
  169. 169Addis AbabaAddis Ababa, Ethiopia
    631.0×
  170. 169Lagoslow-cost sensorsLagos, Nigeria
    631.0×
  171. 169LisieuxNormandy, France
    631.0×
  172. 169FlintMichigan, United States
    631.0×
  173. 173MiddelburgMpumalanga, South Africa
    631.0×
  174. 174WaregemFlanders, Belgium
    631.0×
  175. 175LunelOccitanie, France
    621.0×
  176. 175SulphurLouisiana, United States
    621.0×
  177. 175BeltonTexas, United States
    621.0×
  178. 178MaldegemFlanders, Belgium
    621.0×
  179. 179La PorteTexas, United States
    621.0×
  180. 180KrefeldNorth Rhine-Westphalia, Germany
    621.0×
  181. 180Kempten (Allgäu)Bavaria, Germany
    621.0×
  182. 180Ciudad JuárezChihuahua, Mexico
    621.0×
  183. 183Sainte-Geneviève-des-BoisÎle-de-France, France
    621.0×
  184. 183RouenNormandy, France
    621.0×
  185. 185CardiffWales, United Kingdom
    611.0×
  186. 186Saint-QuentinHauts-de-France, France
    611.0×
  187. 186DouaiHauts-de-France, France
    611.0×
  188. 186Civitanova MarcheThe Marches, Italy
    611.0×
  189. 186Mission BendTexas, United States
    611.0×
  190. 190BartlettTennessee, United States
    611.0×
  191. 190AustinTexas, United States
    611.0×
  192. 192BanningCalifornia, United States
    611.0×
  193. 192IndioCalifornia, United States
    611.0×
  194. 194ZemunCentral Serbia, Serbia
    610.9×
  195. 194PlymouthEngland, United Kingdom
    610.9×
  196. 194Český TěšínMoravian-Silesian Region, Czechia
    610.9×
  197. 197TrnavaTrnava Region, Slovakia
    600.9×
  198. 197LansingMichigan, United States
    600.9×
  199. 199La Línea de la ConcepciónAndalusia, Spain
    600.9×
  200. 199MostaIl-Mosta, Malta
    600.9×

Top 200 of 1,457 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 28, 2023, smogrank.com/history/2023-05-28 (accessed 2 Oct 2026).

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