SmogRank / History / March 29, 2023

Most polluted cities on March 29, 2023

1,501 cities ranked by their average PM2.5 over the day; the worst was Reykjavík, Iceland, at 388.7 µg/m³. Each city's own local calendar day.

← Reykjavík 388.7 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every city ranked for March 29, 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. 1ReykjavíkCapital Region, Iceland
    500+25.9×
  2. 2Mae SaiChiang Rai, Thailand
    49521.5×
  3. 3Ban HouakhouaBokeo, Laos
    27513.3×
  4. 4Chiang RaiChiang Rai, Thailand
    26812.9×
  5. 5Lahorelow-cost sensorsPunjab, Pakistan
    25712.1×
  6. 6LampangLampang, Thailand
    1917.5×
  7. 7NanNan, Thailand
    1887.2×
  8. 8Chiang MaiChiang Mai, Thailand
    1877.1×
  9. 9LamphunLamphun, Thailand
    1826.7×
  10. 10N'DjamenaN’Djaména, Chad
    1786.2×
  11. 11Dhakalow-cost sensorsDhaka Division, Bangladesh
    1766.1×
  12. 12BeijingBeijing, China
    1735.8×
  13. 13TlaquepaqueJalisco, Mexico
    1665.1×
  14. 14Kathmandulow-cost sensorsBagmati Province, Nepal
    1645.0×
  15. 15JakartaJakarta, Indonesia
    1644.9×
  16. 16DelhiDelhi, India
    1614.7×
  17. 17BamakoBamako, Mali
    1584.4×
  18. 18TakTak, Thailand
    1564.2×
  19. 19ShenyangLiaoning, China
    1554.1×
  20. 20PhraePhrae, Thailand
    1554.0×
  21. 21Mae SotTak, Thailand
    1523.8×
  22. 22PakxanBolikhamsai, Laos
    1523.8×
  23. 23Abujalow-cost sensorsFCT, Nigeria
    1513.7×
  24. 24Puerto VarasLos Lagos Region, Chile
    1513.7×
  25. 25LoeiLoei, Thailand
    1383.4×
  26. 26Kampalalow-cost sensorsCentral Region, Uganda
    1373.3×
  27. 27UttaraditUttaradit, Thailand
    1363.3×
  28. 27Ubon RatchathaniUbon Ratchathani, Thailand
    1363.3×
  29. 29SukhothaiSukhothai, Thailand
    1343.3×
  30. 30Kamphaeng PhetKamphaeng Phet, Thailand
    1343.2×
  31. 31OsornoLos Lagos Region, Chile
    1212.9×
  32. 32Si Sa KetSi Sa Ket, Thailand
    1192.8×
  33. 33CoyhaiqueAysén, Chile
    1142.7×
  34. 34CholulaPuebla, Mexico
    1142.7×
  35. 35CelayaGuanajuato, Mexico
    1142.7×
  36. 36GuadalajaraJalisco, Mexico
    1122.7×
  37. 37MukdahanMukdahan, Thailand
    1112.6×
  38. 38Puerto MonttLos Lagos Region, Chile
    1102.6×
  39. 39Islamabadlow-cost sensorsIslamabad, Pakistan
    1092.6×
  40. 40La UniónLos Ríos Region, Chile
    1082.6×
  41. 41BaghdadBaghdad, Iraq
    1052.5×
  42. 42Ga-RankuwaNorth West, South Africa
    1052.5×
  43. 43MexicaliBaja California, Mexico
    1032.4×
  44. 44Roi EtRoi Et, Thailand
    1022.4×
  45. 45Ciudad NezahualcoyotlMéxico, Mexico
    1012.4×
  46. 46Bang Khun ThianBangkok, Thailand
    992.3×
  47. 47XonacatlánMéxico, Mexico
    982.3×
  48. 48San Mateo AtencoMéxico, Mexico
    982.3×
  49. 49PhetchabunPhetchabun, Thailand
    972.3×
  50. 49TolucaMéxico, Mexico
    972.3×
  51. 51AlexandriaAlexandria, Egypt
    962.2×
  52. 52Nakhon RatchasimaNakhon Ratchasima, Thailand
    962.2×
  53. 53Puerto AysénAysén, Chile
    962.2×
  54. 54YangonYangon, Myanmar
    952.2×
  55. 55San Francisco TlalcilalcalpanMéxico, Mexico
    952.2×
  56. 55San Salvador TizatlalliMéxico, Mexico
    952.2×
  57. 57AguascalientesAguascalientes, Mexico
    932.1×
  58. 58SamaAsturias, Spain
    932.1×
  59. 59HanoiHanoi, Vietnam
    932.1×
  60. 60Buri RamBuriram, Thailand
    922.1×
  61. 61PhichitPhichit, Thailand
    912.1×
  62. 61Nakhon SawanNakhon Sawan, Thailand
    912.1×
  63. 63SalamancaGuanajuato, Mexico
    912.0×
  64. 64GijónAsturias, Spain
    902.0×
  65. 65ChaiyaphumChaiyaphum, Thailand
    902.0×
  66. 66Ciudad Benito JuárezNuevo León, Mexico
    902.0×
  67. 67KalasinKalasin, Thailand
    892.0×
  68. 68MumbaiMaharashtra, India
    871.9×
  69. 69Şabāḩ as SālimMubārak al Kabīr, Kuwait
    871.9×
  70. 70ValdiviaLos Ríos Region, Chile
    871.9×
  71. 71Naucalpan de JuárezMéxico, Mexico
    871.9×
  72. 71Puente AltoSantiago Metropolitan, Chile
    871.9×
  73. 73ConakryConakry, Guinea
    861.9×
  74. 73OviedoAsturias, Spain
    861.9×
  75. 75BakuBaki, Azerbaijan
    861.9×
  76. 75ShanghaiShanghai, China
    861.9×
  77. 75NacimientoBiobio, Chile
    861.9×
  78. 78KościanGreater Poland, Poland
    861.8×
  79. 79Udon ThaniUdon Thani, Thailand
    851.8×
  80. 79AricaArica y Parinacota Region, Chile
    851.8×
  81. 81Khon KaenKhon Kaen, Thailand
    851.8×
  82. 81SaltilloCoahuila, Mexico
    851.8×
  83. 83Sing BuriSing Buri, Thailand
    851.8×
  84. 84Mexico CityMexico City, Mexico
    851.8×
  85. 85Valley StationKentucky, United States
    841.8×
  86. 86Nong Bua LamphuNong Bua Lamphu, Thailand
    831.8×
  87. 86San Miguel de AllendeGuanajuato, Mexico
    831.8×
  88. 88TocopillaAntofagasta, Chile
    821.7×
  89. 88SantiagoSantiago Metropolitan, Chile
    821.7×
  90. 88León de los AldamaGuanajuato, Mexico
    821.7×
  91. 91PristinaPristina, Kosovo
    821.7×
  92. 92Sakon NakhonSakon Nakhon, Thailand
    821.7×
  93. 93Si Maha PhotPrachin Buri, Thailand
    821.7×
  94. 94Lop BuriLopburi, Thailand
    811.7×
  95. 95Addis AbabaAddis Ababa, Ethiopia
    801.7×
  96. 96Ciudad JuárezChihuahua, Mexico
    801.6×
  97. 97CuernavacaMorelos, Mexico
    801.6×
  98. 98KanchanaburiKanchanaburi, Thailand
    791.6×
  99. 98Almatylow-cost sensorsAlmaty, Kazakhstan
    791.6×
  100. 98QuinteroValparaiso, Chile
    791.6×
  101. 98Ponca CityOklahoma, United States
    791.6×
  102. 102PueblaPuebla, Mexico
    791.6×
  103. 103Fort SmithArkansas, United States
    791.6×
  104. 104QuillotaValparaiso, Chile
    781.6×
  105. 104Santiago de QuerétaroQuerétaro, Mexico
    781.6×
  106. 106AranyaprathetSa Kaeo, Thailand
    781.6×
  107. 106IrapuatoGuanajuato, Mexico
    781.6×
  108. 108ColomboWestern Province, Sri Lanka
    781.6×
  109. 109KhartoumKhartoum, Sudan
    771.5×
  110. 109Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    771.5×
  111. 111ZnojmoSouth Moravian, Czechia
    771.5×
  112. 112Santa CatarinaNuevo León, Mexico
    771.5×
  113. 113Jelenia GóraLower Silesia, Poland
    761.5×
  114. 114San Juan del RíoQuerétaro, Mexico
    761.5×
  115. 114TalaganteSantiago Metropolitan, Chile
    761.5×
  116. 114GuanajuatoGuanajuato, Mexico
    761.5×
  117. 117San Andrés TuxtlaVeracruz, Mexico
    761.5×
  118. 117LimaLima Province, Peru
    761.5×
  119. 119CopiapóAtacama, Chile
    751.5×
  120. 120AntofagastaAntofagasta, Chile
    751.5×
  121. 121SuwałkiPodlasie, Poland
    751.5×
  122. 122Wan ChaiWan Chai, Hong Kong
    741.4×
  123. 122RancaguaO'Higgins Region, Chile
    741.4×
  124. 122AbasoloGuanajuato, Mexico
    741.4×
  125. 125Jastrzębie ZdrójSilesia, Poland
    741.4×
  126. 126EmalahleniMpumalanga, South Africa
    741.4×
  127. 126ToméBiobio, Chile
    741.4×
  128. 128Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    731.4×
  129. 129CoquimboCoquimbo Region, Chile
    731.4×
  130. 129San Luis PotosíSan Luis Potosí, Mexico
    731.4×
  131. 131ŁukówLublin, Poland
    731.4×
  132. 131Tepeji del Río de OcampoHidalgo, Mexico
    731.4×
  133. 133NišCentral Serbia, Serbia
    731.4×
  134. 133Bielsko-BialaSilesia, Poland
    731.4×
  135. 133TalcahuanoBiobio, Chile
    731.4×
  136. 136AvilésAsturias, Spain
    721.4×
  137. 136La SerenaCoquimbo Region, Chile
    721.4×
  138. 138SaraburiSaraburi, Thailand
    721.4×
  139. 138IndianapolisIndiana, United States
    721.4×
  140. 140TijuanaBaja California, Mexico
    721.3×
  141. 141ŁaskŁódź Voivodeship, Poland
    711.3×
  142. 142RatchaburiRatchaburi, Thailand
    711.3×
  143. 142Gorzów WielkopolskiLubusz, Poland
    711.3×
  144. 144Mong KokYau Tsim Mong District, Hong Kong
    711.3×
  145. 144Pachuca de SotoHidalgo, Mexico
    711.3×
  146. 146TemucoAraucania, Chile
    711.3×
  147. 147GuangzhouGuangdong, China
    701.3×
  148. 147BohumínMoravian-Silesian Region, Czechia
    701.3×
  149. 147RabinalBaja Verapaz, Guatemala
    701.3×
  150. 147Guatemala CityGuatemala, Guatemala
    701.3×
  151. 151WichitaKansas, United States
    701.3×
  152. 152ConcónValparaiso, Chile
    701.3×
  153. 153HualquiBiobio, Chile
    701.3×
  154. 153CuranilahueBiobio, Chile
    701.3×
  155. 155Viña del MarValparaiso, Chile
    701.3×
  156. 155RengoO'Higgins Region, Chile
    701.3×
  157. 157ThabazimbiLimpopo, South Africa
    691.3×
  158. 157KatowiceSilesia, Poland
    691.3×
  159. 159MonterreyNuevo León, Mexico
    691.3×
  160. 160RzeszówSubcarpathia, Poland
    691.2×
  161. 160Bang NaBangkok, Thailand
    691.2×
  162. 162Karachilow-cost sensorsSindh, Pakistan
    691.2×
  163. 163Suphan BuriSuphan Buri, Thailand
    691.2×
  164. 164Surat ThaniSurat Thani, Thailand
    681.2×
  165. 164CoronelBiobio, Chile
    681.2×
  166. 164San Luis de la PazGuanajuato, Mexico
    681.2×
  167. 167RacibórzSilesia, Poland
    681.2×
  168. 168OtwockMazovia, Poland
    671.2×
  169. 168KłodzkoLower Silesia, Poland
    671.2×
  170. 170San Pedro de la PazBiobio, Chile
    671.2×
  171. 171MostÚstí nad Labem Region, Czechia
    671.2×
  172. 172Khlong Sam WaBangkok, Thailand
    671.2×
  173. 173Los ÁngelesBiobio, Chile
    671.2×
  174. 174LublinLublin, Poland
    661.2×
  175. 174KrakówLesser Poland, Poland
    661.2×
  176. 174TulsaOklahoma, United States
    661.2×
  177. 177YalaYala, Thailand
    661.2×
  178. 177FlensburgSchleswig-Holstein, Germany
    661.2×
  179. 177Ciudad ApodacaNuevo León, Mexico
    661.2×
  180. 180PinetownKwaZulu-Natal, South Africa
    661.1×
  181. 180Nong KhaemBangkok, Thailand
    661.1×
  182. 182CuricóMaule Region, Chile
    661.1×
  183. 182Saphan SungBangkok, Thailand
    661.1×
  184. 182San Francisco De BorjaLima region, Peru
    661.1×
  185. 185Coconut CreekFlorida, United States
    661.1×
  186. 186PułtuskMazovia, Poland
    651.1×
  187. 186Ústí nad LabemÚstí nad Labem Region, Czechia
    651.1×
  188. 186TopekaKansas, United States
    651.1×
  189. 189ThembisaGauteng, South Africa
    651.1×
  190. 189TlaxcalaTlaxcala, Mexico
    651.1×
  191. 189CauquenesMaule Region, Chile
    651.1×
  192. 192Ban Talat BuengChon Buri, Thailand
    651.1×
  193. 192KielSchleswig-Holstein, Germany
    651.1×
  194. 192WłocławekKujawsko-Pomorskie, Poland
    651.1×
  195. 192MiędzyrzeczLubusz, Poland
    651.1×
  196. 196Banja LukaSrpska, Bosnia and Herzegovina
    651.1×
  197. 197Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    651.1×
  198. 198ChisinauChișinău Municipality, Moldova
    641.1×
  199. 198StarachowiceŚwiętokrzyskie, Poland
    641.1×
  200. 198DushanbeDushanbe, Tajikistan
    641.1×

Top 200 of 1,501 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, March 29, 2023, smogrank.com/history/2023-03-29 (accessed 2 Oct 2026).

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