SmogRank / History / March 26, 2023

Most polluted cities on March 26, 2023

1,455 cities ranked by their average PM2.5 over the day; the worst was Reykjavík, Iceland, at 948.0 µg/m³. Each city's own local calendar day.

← Reykjavík 948.0 µg/m³ 900 µg/m³15 WHO 24-hour guideline
Every city ranked for March 26, 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+63.2×
  2. 2Mae SaiChiang Rai, Thailand
    500+32.8×
  3. 3Ban HouakhouaBokeo, Laos
    30615.2×
  4. 4Chiang RaiChiang Rai, Thailand
    29214.5×
  5. 5N'DjamenaN’Djaména, Chad
    27613.4×
  6. 6PhayaoPhayao, Thailand
    25011.7×
  7. 7PakxanBolikhamsai, Laos
    24111.1×
  8. 8NanNan, Thailand
    24011.0×
  9. 9LampangLampang, Thailand
    1967.9×
  10. 10PhraePhrae, Thailand
    1917.5×
  11. 11Chiang MaiChiang Mai, Thailand
    1907.4×
  12. 12LamphunLamphun, Thailand
    1816.5×
  13. 13KhartoumKhartoum, Sudan
    1806.5×
  14. 14Dhakalow-cost sensorsDhaka Division, Bangladesh
    1786.3×
  15. 15BamakoBamako, Mali
    1776.2×
  16. 16LoeiLoei, Thailand
    1705.5×
  17. 17Kamphaeng PhetKamphaeng Phet, Thailand
    1675.3×
  18. 18PhetchabunPhetchabun, Thailand
    1594.5×
  19. 19Lahorelow-cost sensorsPunjab, Pakistan
    1594.4×
  20. 20Mae SotTak, Thailand
    1584.3×
  21. 21Ubon RatchathaniUbon Ratchathani, Thailand
    1544.0×
  22. 22SukhothaiSukhothai, Thailand
    1544.0×
  23. 23DelhiDelhi, India
    1523.8×
  24. 24UttaraditUttaradit, Thailand
    1503.7×
  25. 25CholulaPuebla, Mexico
    1483.6×
  26. 26TlaquepaqueJalisco, Mexico
    1423.5×
  27. 27Kathmandulow-cost sensorsBagmati Province, Nepal
    1413.4×
  28. 28PhichitPhichit, Thailand
    1403.4×
  29. 29MukdahanMukdahan, Thailand
    1393.4×
  30. 30JeddahMecca Region, Saudi Arabia
    1343.3×
  31. 31ChaiyaphumChaiyaphum, Thailand
    1323.2×
  32. 32Nong Bua LamphuNong Bua Lamphu, Thailand
    1293.1×
  33. 33Ciudad Benito JuárezNuevo León, Mexico
    1283.1×
  34. 34Sakon NakhonSakon Nakhon, Thailand
    1283.1×
  35. 35Udon ThaniUdon Thani, Thailand
    1273.1×
  36. 36DushanbeDushanbe, Tajikistan
    1263.0×
  37. 37San Francisco TlalcilalcalpanMéxico, Mexico
    1233.0×
  38. 38Nakhon SawanNakhon Sawan, Thailand
    1222.9×
  39. 39Khon KaenKhon Kaen, Thailand
    1192.9×
  40. 39Abujalow-cost sensorsFCT, Nigeria
    1192.9×
  41. 41Bang Khun ThianBangkok, Thailand
    1182.8×
  42. 42KalasinKalasin, Thailand
    1162.8×
  43. 43BaghdadBaghdad, Iraq
    1142.7×
  44. 44KanchanaburiKanchanaburi, Thailand
    1122.7×
  45. 45Roi EtRoi Et, Thailand
    1082.6×
  46. 46Ga-RankuwaNorth West, South Africa
    1062.5×
  47. 47Karachilow-cost sensorsSindh, Pakistan
    1052.5×
  48. 48SalorTashkent Region, Uzbekistan
    1052.5×
  49. 49CoyhaiqueAysén, Chile
    1052.5×
  50. 50Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1042.4×
  51. 51Si Sa KetSi Sa Ket, Thailand
    1042.4×
  52. 52TakTak, Thailand
    1022.4×
  53. 53Sing BuriSing Buri, Thailand
    1022.4×
  54. 54Nakhon RatchasimaNakhon Ratchasima, Thailand
    1002.3×
  55. 55CuricóMaule Region, Chile
    992.3×
  56. 56Lop BuriLopburi, Thailand
    992.3×
  57. 56HualpénBiobio, Chile
    992.3×
  58. 58MexicaliBaja California, Mexico
    982.3×
  59. 59YangonYangon, Myanmar
    972.3×
  60. 60Islamabadlow-cost sensorsIslamabad, Pakistan
    972.3×
  61. 61Kampalalow-cost sensorsCentral Region, Uganda
    962.2×
  62. 62San Mateo AtencoMéxico, Mexico
    962.2×
  63. 63LinaresMaule Region, Chile
    952.2×
  64. 64Almatylow-cost sensorsAlmaty, Kazakhstan
    932.1×
  65. 64Suphan BuriSuphan Buri, Thailand
    932.1×
  66. 66AlexandriaAlexandria, Egypt
    922.1×
  67. 67TalcaMaule Region, Chile
    922.1×
  68. 67QuillotaValparaiso, Chile
    922.1×
  69. 67EtwatwaGauteng, South Africa
    922.1×
  70. 70SaraburiSaraburi, Thailand
    922.1×
  71. 70Mexico CityMexico City, Mexico
    922.1×
  72. 72Buri RamBuriram, Thailand
    912.1×
  73. 73Ciudad ApodacaNuevo León, Mexico
    912.0×
  74. 74RatchaburiRatchaburi, Thailand
    902.0×
  75. 74CelayaGuanajuato, Mexico
    902.0×
  76. 76Şabāḩ as SālimMubārak al Kabīr, Kuwait
    902.0×
  77. 76San CarlosÑuble, Chile
    902.0×
  78. 78TolucaMéxico, Mexico
    902.0×
  79. 78San Salvador TizatlalliMéxico, Mexico
    902.0×
  80. 80Viña del MarValparaiso, Chile
    902.0×
  81. 80RancaguaO'Higgins Region, Chile
    902.0×
  82. 82HanoiHanoi, Vietnam
    892.0×
  83. 83Puente AltoSantiago Metropolitan, Chile
    892.0×
  84. 84Cadereyta JiménezNuevo León, Mexico
    892.0×
  85. 84SantiagoSantiago Metropolitan, Chile
    892.0×
  86. 86PueblaPuebla, Mexico
    881.9×
  87. 87Puerto VarasLos Lagos Region, Chile
    871.9×
  88. 88ChillánÑuble, Chile
    871.9×
  89. 89XonacatlánMéxico, Mexico
    861.9×
  90. 90MonterreyNuevo León, Mexico
    861.9×
  91. 91RengoO'Higgins Region, Chile
    851.8×
  92. 92Ciudad NezahualcoyotlMéxico, Mexico
    851.8×
  93. 93Naucalpan de JuárezMéxico, Mexico
    851.8×
  94. 94Yerevanlow-cost sensorsYerevan, Armenia
    841.8×
  95. 94Bang NaBangkok, Thailand
    841.8×
  96. 96La SerenaCoquimbo Region, Chile
    841.8×
  97. 97Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    831.8×
  98. 98QuinteroValparaiso, Chile
    831.7×
  99. 99ShanghaiShanghai, China
    821.7×
  100. 99TalaganteSantiago Metropolitan, Chile
    821.7×
  101. 101TijuanaBaja California, Mexico
    821.7×
  102. 102VereenigingGauteng, South Africa
    821.7×
  103. 103Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    811.7×
  104. 103CoquimboCoquimbo Region, Chile
    811.7×
  105. 103Khlong Sam WaBangkok, Thailand
    811.7×
  106. 106NacimientoBiobio, Chile
    811.7×
  107. 106ConcónValparaiso, Chile
    811.7×
  108. 106GuadalajaraJalisco, Mexico
    811.7×
  109. 109Hua HinPrachuap Khiri Khan, Thailand
    811.7×
  110. 110Túxpam de Rodríguez CanoVeracruz, Mexico
    811.7×
  111. 111MumbaiMaharashtra, India
    801.6×
  112. 112León de los AldamaGuanajuato, Mexico
    791.6×
  113. 113Nakhon PathomNakhon Pathom, Thailand
    791.6×
  114. 114CuernavacaMorelos, Mexico
    781.6×
  115. 115Ban Samae DamBangkok, Thailand
    781.6×
  116. 115Santa CatarinaNuevo León, Mexico
    781.6×
  117. 117Khlong LuangPathum Thani, Thailand
    781.6×
  118. 118Nong KhaemBangkok, Thailand
    781.6×
  119. 118Ciudad General EscobedoNuevo León, Mexico
    781.6×
  120. 118Saphan SungBangkok, Thailand
    781.6×
  121. 121CauquenesMaule Region, Chile
    781.6×
  122. 122HualquiBiobio, Chile
    771.6×
  123. 123Tepeji del Río de OcampoHidalgo, Mexico
    771.5×
  124. 124TlaxcalaTlaxcala, Mexico
    771.5×
  125. 124PasadenaTexas, United States
    771.5×
  126. 126Puerto AysénAysén, Chile
    771.5×
  127. 127PristinaPristina, Kosovo
    761.5×
  128. 127La OrotavaCanary Islands, Spain
    761.5×
  129. 127HoustonTexas, United States
    761.5×
  130. 127Sai MaiBangkok, Thailand
    761.5×
  131. 131TemucoAraucania, Chile
    761.5×
  132. 132CoronelBiobio, Chile
    761.5×
  133. 132San Luis PotosíSan Luis Potosí, Mexico
    761.5×
  134. 132BaytownTexas, United States
    761.5×
  135. 135RabinalBaja Verapaz, Guatemala
    751.5×
  136. 135Guatemala CityGuatemala, Guatemala
    751.5×
  137. 135EdinburgTexas, United States
    751.5×
  138. 138EmalahleniMpumalanga, South Africa
    751.5×
  139. 138La UniónLos Ríos Region, Chile
    751.5×
  140. 138San Pedro de la PazBiobio, Chile
    751.5×
  141. 138Khan Na YaoBangkok, Thailand
    751.5×
  142. 142Nong ChokBangkok, Thailand
    751.5×
  143. 143Pachuca de SotoHidalgo, Mexico
    741.4×
  144. 143AntofagastaAntofagasta, Chile
    741.4×
  145. 143LimaLima Province, Peru
    741.4×
  146. 146BangkokBangkok, Thailand
    741.4×
  147. 146TalcahuanoBiobio, Chile
    741.4×
  148. 146Lak SiBangkok, Thailand
    741.4×
  149. 149San Juan del RíoQuerétaro, Mexico
    741.4×
  150. 150Bang KapiBangkok, Thailand
    731.4×
  151. 151JundiaíSão Paulo, Brazil
    731.4×
  152. 151Bueng KumBangkok, Thailand
    731.4×
  153. 153BeijingBeijing, China
    731.4×
  154. 154Surat ThaniSurat Thani, Thailand
    721.4×
  155. 155CuranilahueBiobio, Chile
    721.4×
  156. 155ConcepciónBiobio, Chile
    721.4×
  157. 157Santiago de QuerétaroQuerétaro, Mexico
    721.4×
  158. 157BrownsvilleTexas, United States
    721.4×
  159. 159Los ÁngelesBiobio, Chile
    721.3×
  160. 160VeracruzVeracruz, Mexico
    711.3×
  161. 161ChisinauChișinău Municipality, Moldova
    711.3×
  162. 162ThembisaGauteng, South Africa
    711.3×
  163. 162Mueang NonthaburiNonthaburi, Thailand
    711.3×
  164. 162Bang Bo DistrictSamut Prakan, Thailand
    711.3×
  165. 162CampinasSão Paulo, Brazil
    711.3×
  166. 162Lat KrabangBangkok, Thailand
    711.3×
  167. 167YalaYala, Thailand
    711.3×
  168. 168Rio ClaroSão Paulo, Brazil
    701.3×
  169. 168CopiapóAtacama, Chile
    701.3×
  170. 168SalamancaGuanajuato, Mexico
    701.3×
  171. 168Ciudad JuárezChihuahua, Mexico
    701.3×
  172. 172BakuBaki, Azerbaijan
    701.3×
  173. 172HueytownAlabama, United States
    701.3×
  174. 174ColomboWestern Province, Sri Lanka
    691.3×
  175. 174ChiguayanteBiobio, Chile
    691.3×
  176. 174AricaArica y Parinacota Region, Chile
    691.3×
  177. 174Missouri CityTexas, United States
    691.3×
  178. 178Ban ChangRayong, Thailand
    691.3×
  179. 179LimeiraSão Paulo, Brazil
    691.3×
  180. 179Mission BendTexas, United States
    691.3×
  181. 181LaredoTexas, United States
    691.2×
  182. 182Ban Khlong PrawetBangkok, Thailand
    681.2×
  183. 183Ban Talat BuengChon Buri, Thailand
    681.2×
  184. 184San Luis de la PazGuanajuato, Mexico
    681.2×
  185. 185ConakryConakry, Guinea
    671.2×
  186. 186Hat YaiSongkhla, Thailand
    671.2×
  187. 186São PauloSão Paulo, Brazil
    671.2×
  188. 186Puerto MonttLos Lagos Region, Chile
    671.2×
  189. 189Villa Poeta José Gálvez BarrenecheaLima region, Peru
    671.2×
  190. 190Phra PradaengSamut Prakan, Thailand
    661.2×
  191. 191Laem ChabangChon Buri, Thailand
    661.2×
  192. 192TocopillaAntofagasta, Chile
    661.1×
  193. 193AugustówPodlasie, Poland
    661.1×
  194. 193Corpus ChristiTexas, United States
    661.1×
  195. 195AranyaprathetSa Kaeo, Thailand
    651.1×
  196. 196AthensAttica, Greece
    651.1×
  197. 196LotaBiobio, Chile
    651.1×
  198. 196BirminghamAlabama, United States
    651.1×
  199. 196AustinTexas, United States
    651.1×
  200. 200CalamaAntofagasta, Chile
    651.1×

Top 200 of 1,455 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 26, 2023, smogrank.com/history/2023-03-26 (accessed 2 Oct 2026).

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