SmogRank / History / May 6, 2023

Most polluted cities on May 6, 2023

1,550 cities ranked by their average PM2.5 over the day; the worst was Dushanbe, Tajikistan, at 201.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during May 6, 2023. All episodes.

← Dushanbe 201.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for May 6, 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. 1DushanbeDushanbe, Tajikistan
    27613.4×
  2. 2WłocławekKujawsko-Pomorskie, Poland
    1978.1×
  3. 3Grande PrairieAlberta, Canada
    1897.3×
  4. 4DelhiDelhi, India
    1846.9×
  5. 5Fort St. JohnBritish Columbia, Canada
    1846.8×
  6. 6CuricóMaule Region, Chile
    1766.1×
  7. 7LinaresMaule Region, Chile
    1715.6×
  8. 8PhayaoPhayao, Thailand
    1675.2×
  9. 9Fort McMurrayAlberta, Canada
    1645.0×
  10. 10Ciudad Benito JuárezNuevo León, Mexico
    1645.0×
  11. 11NacimientoBiobio, Chile
    1644.9×
  12. 12Lahorelow-cost sensorsPunjab, Pakistan
    1644.9×
  13. 13SantiagoSantiago Metropolitan, Chile
    1624.7×
  14. 14RancaguaO'Higgins Region, Chile
    1604.6×
  15. 15Dhakalow-cost sensorsDhaka Division, Bangladesh
    1594.4×
  16. 16NanNan, Thailand
    1574.3×
  17. 17ChillánÑuble, Chile
    1574.2×
  18. 18Puente AltoSantiago Metropolitan, Chile
    1564.2×
  19. 19San CarlosÑuble, Chile
    1564.1×
  20. 20Ga-RankuwaNorth West, South Africa
    1523.8×
  21. 21AstanaAstana, Kazakhstan
    1513.7×
  22. 22TalaganteSantiago Metropolitan, Chile
    1503.7×
  23. 23PhraePhrae, Thailand
    1453.6×
  24. 24UttaraditUttaradit, Thailand
    1453.5×
  25. 25QuillotaValparaiso, Chile
    1393.4×
  26. 26HanoiHanoi, Vietnam
    1383.4×
  27. 27Ciudad ApodacaNuevo León, Mexico
    1383.4×
  28. 28San Salvador TizatlalliMéxico, Mexico
    1363.3×
  29. 29Chiang MaiChiang Mai, Thailand
    1343.3×
  30. 30LampangLampang, Thailand
    1343.2×
  31. 31Tha BoNong Khai, Thailand
    1333.2×
  32. 32CelayaGuanajuato, Mexico
    1313.2×
  33. 33CholulaPuebla, Mexico
    1313.2×
  34. 34Addis AbabaAddis Ababa, Ethiopia
    1283.1×
  35. 35MukdahanMukdahan, Thailand
    1263.0×
  36. 36Ubon RatchathaniUbon Ratchathani, Thailand
    1263.0×
  37. 37CauquenesMaule Region, Chile
    1253.0×
  38. 38San Andrés TuxtlaVeracruz, Mexico
    1253.0×
  39. 39Puerto VarasLos Lagos Region, Chile
    1222.9×
  40. 39Los ÁngelesBiobio, Chile
    1222.9×
  41. 41KigaliKigali, Rwanda
    1212.9×
  42. 42CoronelBiobio, Chile
    1212.9×
  43. 43MonterreyNuevo León, Mexico
    1202.9×
  44. 44LoeiLoei, Thailand
    1192.9×
  45. 45LamphunLamphun, Thailand
    1172.8×
  46. 46Mae SaiChiang Rai, Thailand
    1162.8×
  47. 47TalcaMaule Region, Chile
    1152.8×
  48. 48Zacatepec de HidalgoMorelos, Mexico
    1142.7×
  49. 49San Mateo AtencoMéxico, Mexico
    1142.7×
  50. 50RabinalBaja Verapaz, Guatemala
    1142.7×
  51. 50Guatemala CityGuatemala, Guatemala
    1142.7×
  52. 52HualquiBiobio, Chile
    1132.7×
  53. 53LaredoTexas, United States
    1122.7×
  54. 54Viña del MarValparaiso, Chile
    1112.6×
  55. 55XonacatlánMéxico, Mexico
    1102.6×
  56. 56TolucaMéxico, Mexico
    1102.6×
  57. 57Silao de la VictoriaGuanajuato, Mexico
    1102.6×
  58. 58BaghdadBaghdad, Iraq
    1102.6×
  59. 58PakxanBolikhamsai, Laos
    1102.6×
  60. 58Santa CatarinaNuevo León, Mexico
    1102.6×
  61. 61Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1082.6×
  62. 62PhetchabunPhetchabun, Thailand
    1082.5×
  63. 63CuernavacaMorelos, Mexico
    1072.5×
  64. 63Cadereyta JiménezNuevo León, Mexico
    1072.5×
  65. 65KalasinKalasin, Thailand
    1062.5×
  66. 66ThembisaGauteng, South Africa
    1052.5×
  67. 67Chiang RaiChiang Rai, Thailand
    1032.4×
  68. 68BelmopanCayo District, Belize
    1022.4×
  69. 69GarcíaNuevo León, Mexico
    1022.4×
  70. 70Tepeji del Río de OcampoHidalgo, Mexico
    1022.4×
  71. 70Eagle PassTexas, United States
    1022.4×
  72. 72San Francisco TlalcilalcalpanMéxico, Mexico
    1012.4×
  73. 73Udon ThaniUdon Thani, Thailand
    1002.4×
  74. 73Mexico CityMexico City, Mexico
    1002.4×
  75. 75ConcónValparaiso, Chile
    992.3×
  76. 76SukhothaiSukhothai, Thailand
    992.3×
  77. 76PhichitPhichit, Thailand
    992.3×
  78. 78Mae SotTak, Thailand
    982.3×
  79. 79ColomboWestern Province, Sri Lanka
    982.3×
  80. 80Naucalpan de JuárezMéxico, Mexico
    982.3×
  81. 81Roi EtRoi Et, Thailand
    972.3×
  82. 82Ban HouakhouaBokeo, Laos
    972.2×
  83. 83SalamancaGuanajuato, Mexico
    962.2×
  84. 84HualpénBiobio, Chile
    962.2×
  85. 85Kathmandulow-cost sensorsBagmati Province, Nepal
    962.2×
  86. 85AbasoloGuanajuato, Mexico
    962.2×
  87. 87QuinteroValparaiso, Chile
    942.1×
  88. 88León de los AldamaGuanajuato, Mexico
    932.1×
  89. 89San Luis PotosíSan Luis Potosí, Mexico
    922.1×
  90. 90Bang NaBangkok, Thailand
    922.1×
  91. 91EdinburgTexas, United States
    912.1×
  92. 92ToméBiobio, Chile
    912.0×
  93. 92TalcahuanoBiobio, Chile
    912.0×
  94. 94Nong Bua LamphuNong Bua Lamphu, Thailand
    902.0×
  95. 95Lop BuriLopburi, Thailand
    902.0×
  96. 96JohannesburgGauteng, South Africa
    902.0×
  97. 97Islamabadlow-cost sensorsIslamabad, Pakistan
    902.0×
  98. 98San Luis de la PazGuanajuato, Mexico
    881.9×
  99. 99VeracruzVeracruz, Mexico
    881.9×
  100. 100Kamphaeng PhetKamphaeng Phet, Thailand
    871.9×
  101. 100LotaBiobio, Chile
    871.9×
  102. 102Sakon NakhonSakon Nakhon, Thailand
    871.9×
  103. 103GuanajuatoGuanajuato, Mexico
    871.9×
  104. 104Khon KaenKhon Kaen, Thailand
    861.9×
  105. 105CoquimboCoquimbo Region, Chile
    861.9×
  106. 106TemucoAraucania, Chile
    851.8×
  107. 107San Miguel de AllendeGuanajuato, Mexico
    851.8×
  108. 108TlaxcalaTlaxcala, Mexico
    851.8×
  109. 109Kampalalow-cost sensorsCentral Region, Uganda
    851.8×
  110. 109CoyhaiqueAysén, Chile
    851.8×
  111. 111Si Sa KetSi Sa Ket, Thailand
    851.8×
  112. 112HyderabadTelangana, India
    841.8×
  113. 112Si Maha PhotPrachin Buri, Thailand
    841.8×
  114. 114Sing BuriSing Buri, Thailand
    841.8×
  115. 114La SerenaCoquimbo Region, Chile
    841.8×
  116. 116PueblaPuebla, Mexico
    841.8×
  117. 116Santiago de QuerétaroQuerétaro, Mexico
    841.8×
  118. 118ChiguayanteBiobio, Chile
    841.8×
  119. 119CuranilahueBiobio, Chile
    831.8×
  120. 120Suphan BuriSuphan Buri, Thailand
    831.8×
  121. 121ManamaManama, Bahrain
    821.7×
  122. 122IrapuatoGuanajuato, Mexico
    821.7×
  123. 123YangonYangon, Myanmar
    821.7×
  124. 123Pachuca de SotoHidalgo, Mexico
    821.7×
  125. 125ChaiyaphumChaiyaphum, Thailand
    821.7×
  126. 126Nakhon RatchasimaNakhon Ratchasima, Thailand
    821.7×
  127. 126Jastrzębie ZdrójSilesia, Poland
    821.7×
  128. 126Khlong Sam WaBangkok, Thailand
    821.7×
  129. 129Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    821.7×
  130. 130Chai NatChai Nat, Thailand
    811.7×
  131. 131SalorTashkent Region, Uzbekistan
    801.7×
  132. 131TexarkanaTexas, United States
    801.7×
  133. 131Khan Na YaoBangkok, Thailand
    801.7×
  134. 134Nakhon SawanNakhon Sawan, Thailand
    801.6×
  135. 135PristinaPristina, Kosovo
    801.6×
  136. 135Buri RamBuriram, Thailand
    801.6×
  137. 135AntofagastaAntofagasta, Chile
    801.6×
  138. 138Karachilow-cost sensorsSindh, Pakistan
    791.6×
  139. 139Nong KhaemBangkok, Thailand
    791.6×
  140. 140OpavaMoravian-Silesian Region, Czechia
    791.6×
  141. 141ConcepciónBiobio, Chile
    791.6×
  142. 142OsornoLos Lagos Region, Chile
    781.6×
  143. 143Saphan SungBangkok, Thailand
    781.6×
  144. 144Şabāḩ as SālimMubārak al Kabīr, Kuwait
    771.5×
  145. 144Lak SiBangkok, Thailand
    771.5×
  146. 146GuadalajaraJalisco, Mexico
    771.5×
  147. 147SaraburiSaraburi, Thailand
    761.5×
  148. 148RacibórzSilesia, Poland
    761.5×
  149. 148AricaArica y Parinacota Region, Chile
    761.5×
  150. 150La UniónLos Ríos Region, Chile
    761.5×
  151. 151San Pedro de la PazBiobio, Chile
    751.5×
  152. 152San AntonioTexas, United States
    751.5×
  153. 153AnconaThe Marches, Italy
    751.5×
  154. 153AguascalientesAguascalientes, Mexico
    751.5×
  155. 155GuangzhouGuangdong, China
    751.5×
  156. 156Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    741.4×
  157. 157Puerto MonttLos Lagos Region, Chile
    741.4×
  158. 157Lat KrabangBangkok, Thailand
    741.4×
  159. 159HavířovMoravian-Silesian Region, Czechia
    741.4×
  160. 160Bang KapiBangkok, Thailand
    741.4×
  161. 160Laem ChabangChon Buri, Thailand
    741.4×
  162. 162Kędzierzyn-KoźleOpole Voivodeship, Poland
    731.4×
  163. 163BakuBaki, Azerbaijan
    731.4×
  164. 164Corpus ChristiTexas, United States
    731.4×
  165. 165Samut PrakanSamut Prakan, Thailand
    721.4×
  166. 165Bang Bo DistrictSamut Prakan, Thailand
    721.4×
  167. 165ValdiviaLos Ríos Region, Chile
    721.4×
  168. 168BangkokBangkok, Thailand
    721.4×
  169. 169ThabazimbiLimpopo, South Africa
    721.4×
  170. 169Nong ChokBangkok, Thailand
    721.4×
  171. 169Bueng KumBangkok, Thailand
    721.4×
  172. 172RatchaburiRatchaburi, Thailand
    721.4×
  173. 173CopiapóAtacama, Chile
    721.3×
  174. 174JakartaJakarta, Indonesia
    711.3×
  175. 175Ban Talat BuengChon Buri, Thailand
    711.3×
  176. 176KlerksdorpNorth West, South Africa
    711.3×
  177. 176Khlong LuangPathum Thani, Thailand
    711.3×
  178. 178ZemunCentral Serbia, Serbia
    711.3×
  179. 179Sai MaiBangkok, Thailand
    701.3×
  180. 180BrakpanGauteng, South Africa
    701.3×
  181. 180OstravaMoravian-Silesian Region, Czechia
    701.3×
  182. 180KłodzkoLower Silesia, Poland
    701.3×
  183. 183AntananarivoAnalamanga, Madagascar
    701.3×
  184. 184Mission BendTexas, United States
    691.2×
  185. 185CalamaAntofagasta, Chile
    691.2×
  186. 186Ban ChangRayong, Thailand
    691.2×
  187. 187RayongRayong, Thailand
    681.2×
  188. 187Bielsko-BialaSilesia, Poland
    681.2×
  189. 189Novi PazarCentral Serbia, Serbia
    681.2×
  190. 189TocopillaAntofagasta, Chile
    681.2×
  191. 191Phra PradaengSamut Prakan, Thailand
    681.2×
  192. 191BaytownTexas, United States
    681.2×
  193. 193ChanthaburiChanthaburi, Thailand
    681.2×
  194. 193's-GravenzandeSouth Holland, The Netherlands
    681.2×
  195. 193Puerto AysénAysén, Chile
    681.2×
  196. 193RichmondCalifornia, United States
    681.2×
  197. 197AustinTexas, United States
    671.2×
  198. 198KanchanaburiKanchanaburi, Thailand
    671.2×
  199. 198Mueang NonthaburiNonthaburi, Thailand
    671.2×
  200. 198DěčínÚstí nad Labem Region, Czechia
    671.2×

Top 200 of 1,550 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 6, 2023, smogrank.com/history/2023-05-06 (accessed 2 Oct 2026).

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