SmogRank / History / April 11, 2023

Most polluted cities on April 11, 2023

1,488 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 317.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during April 11, 2023. All episodes.

← N'Djamena 317.0 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every city ranked for April 11, 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. 1N'DjamenaN’Djaména, Chad
    48321.1×
  2. 2Dhakalow-cost sensorsDhaka Division, Bangladesh
    29414.6×
  3. 3Mae SaiChiang Rai, Thailand
    25912.3×
  4. 4CoyhaiqueAysén, Chile
    24311.2×
  5. 5Ban HouakhouaBokeo, Laos
    2179.5×
  6. 6Chiang RaiChiang Rai, Thailand
    2159.3×
  7. 7Chiang MaiChiang Mai, Thailand
    1968.0×
  8. 8Lahorelow-cost sensorsPunjab, Pakistan
    1967.9×
  9. 9DelhiDelhi, India
    1947.8×
  10. 10Kathmandulow-cost sensorsBagmati Province, Nepal
    1897.3×
  11. 11PhayaoPhayao, Thailand
    1776.2×
  12. 12Tha BoNong Khai, Thailand
    1766.0×
  13. 13NanNan, Thailand
    1756.0×
  14. 14LampangLampang, Thailand
    1735.8×
  15. 15LamphunLamphun, Thailand
    1705.5×
  16. 16BeijingBeijing, China
    1675.2×
  17. 17LoeiLoei, Thailand
    1634.8×
  18. 18SukhothaiSukhothai, Thailand
    1604.6×
  19. 19Kamphaeng PhetKamphaeng Phet, Thailand
    1594.5×
  20. 19PhraePhrae, Thailand
    1594.5×
  21. 21KhartoumKhartoum, Sudan
    1554.1×
  22. 22ManamaManama, Bahrain
    1544.0×
  23. 23HanoiHanoi, Vietnam
    1544.0×
  24. 24Ubon RatchathaniUbon Ratchathani, Thailand
    1533.9×
  25. 25PakxanBolikhamsai, Laos
    1533.9×
  26. 26Novi PazarCentral Serbia, Serbia
    1533.9×
  27. 27ShenyangLiaoning, China
    1533.9×
  28. 28UttaraditUttaradit, Thailand
    1523.8×
  29. 29Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1513.7×
  30. 30MukdahanMukdahan, Thailand
    1483.6×
  31. 31BamakoBamako, Mali
    1483.6×
  32. 32Nong Bua LamphuNong Bua Lamphu, Thailand
    1443.5×
  33. 33YangonYangon, Myanmar
    1433.5×
  34. 34Udon ThaniUdon Thani, Thailand
    1403.4×
  35. 35Khon KaenKhon Kaen, Thailand
    1403.4×
  36. 36BaghdadBaghdad, Iraq
    1393.4×
  37. 36HyderabadTelangana, India
    1393.4×
  38. 38DushanbeDushanbe, Tajikistan
    1393.4×
  39. 38Bang Khun ThianBangkok, Thailand
    1393.4×
  40. 40Sakon NakhonSakon Nakhon, Thailand
    1373.3×
  41. 40KalasinKalasin, Thailand
    1373.3×
  42. 42PhetchabunPhetchabun, Thailand
    1323.2×
  43. 43Sing BuriSing Buri, Thailand
    1293.1×
  44. 44TlaquepaqueJalisco, Mexico
    1293.1×
  45. 45Şabāḩ as SālimMubārak al Kabīr, Kuwait
    1283.1×
  46. 46Roi EtRoi Et, Thailand
    1273.1×
  47. 47IngenioCanary Islands, Spain
    1263.0×
  48. 48PhichitPhichit, Thailand
    1243.0×
  49. 49Chai NatChai Nat, Thailand
    1212.9×
  50. 50Si Sa KetSi Sa Ket, Thailand
    1212.9×
  51. 51BloemfonteinFree State, South Africa
    1202.9×
  52. 52Santa Cruz de TenerifeCanary Islands, Spain
    1192.9×
  53. 53Lop BuriLopburi, Thailand
    1182.8×
  54. 54ValjevoCentral Serbia, Serbia
    1172.8×
  55. 55LazarevacCentral Serbia, Serbia
    1162.8×
  56. 55Nakhon SawanNakhon Sawan, Thailand
    1162.8×
  57. 57OsornoLos Lagos Region, Chile
    1162.8×
  58. 58AshgabatAshgabat, Turkmenistan
    1112.6×
  59. 59ChaiyaphumChaiyaphum, Thailand
    1102.6×
  60. 60Las Palmas de Gran CanariaCanary Islands, Spain
    1102.6×
  61. 61TakTak, Thailand
    1102.6×
  62. 62Puerto AysénAysén, Chile
    1062.5×
  63. 63KragujevacCentral Serbia, Serbia
    1042.4×
  64. 64Islamabadlow-cost sensorsIslamabad, Pakistan
    1032.4×
  65. 65Puerto VarasLos Lagos Region, Chile
    1032.4×
  66. 66Nakhon RatchasimaNakhon Ratchasima, Thailand
    1022.4×
  67. 66La OrotavaCanary Islands, Spain
    1022.4×
  68. 68Suphan BuriSuphan Buri, Thailand
    1022.4×
  69. 69Yerevanlow-cost sensorsYerevan, Armenia
    1022.4×
  70. 70PristinaPristina, Kosovo
    1012.4×
  71. 71SmederevoCentral Serbia, Serbia
    1002.3×
  72. 72RatchaburiRatchaburi, Thailand
    992.3×
  73. 73ColomboWestern Province, Sri Lanka
    982.3×
  74. 74MexicaliBaja California, Mexico
    982.3×
  75. 75Buri RamBuriram, Thailand
    972.3×
  76. 76Bang NaBangkok, Thailand
    972.3×
  77. 77NišCentral Serbia, Serbia
    972.2×
  78. 78ArrecifeCanary Islands, Spain
    962.2×
  79. 79RacibórzSilesia, Poland
    962.2×
  80. 80San IsidroCanary Islands, Spain
    962.2×
  81. 81MumbaiMaharashtra, India
    962.2×
  82. 82SantiagoSantiago Metropolitan, Chile
    942.2×
  83. 83ObrenovacCentral Serbia, Serbia
    932.1×
  84. 84YalaYala, Thailand
    932.1×
  85. 85Si Maha PhotPrachin Buri, Thailand
    932.1×
  86. 85AgüimesCanary Islands, Spain
    932.1×
  87. 87KanchanaburiKanchanaburi, Thailand
    922.1×
  88. 87Jastrzębie ZdrójSilesia, Poland
    922.1×
  89. 89GuangzhouGuangdong, China
    922.1×
  90. 90CandelariaCanary Islands, Spain
    922.1×
  91. 91Kampalalow-cost sensorsCentral Region, Uganda
    922.1×
  92. 92ZemunCentral Serbia, Serbia
    912.1×
  93. 93BelgradeCentral Serbia, Serbia
    902.0×
  94. 94IndianapolisIndiana, United States
    902.0×
  95. 95ČačakCentral Serbia, Serbia
    902.0×
  96. 95MaspalomasCanary Islands, Spain
    902.0×
  97. 97NarathiwatNarathiwat, Thailand
    902.0×
  98. 97Viña del MarValparaiso, Chile
    902.0×
  99. 99Los AngelesCalifornia, United States
    892.0×
  100. 100Khlong Sam WaBangkok, Thailand
    892.0×
  101. 101RancaguaO'Higgins Region, Chile
    892.0×
  102. 102Granadilla de AbonaCanary Islands, Spain
    881.9×
  103. 103Hat YaiSongkhla, Thailand
    881.9×
  104. 104BelmopanCayo District, Belize
    881.9×
  105. 105Puerto del RosarioCanary Islands, Spain
    881.9×
  106. 106TalaganteSantiago Metropolitan, Chile
    881.9×
  107. 107BurgosCastille and León, Spain
    881.9×
  108. 107San Mateo AtencoMéxico, Mexico
    881.9×
  109. 107ValdiviaLos Ríos Region, Chile
    881.9×
  110. 110Karachilow-cost sensorsSindh, Pakistan
    871.9×
  111. 111San Salvador TizatlalliMéxico, Mexico
    871.9×
  112. 112CelayaGuanajuato, Mexico
    871.9×
  113. 113Hua HinPrachuap Khiri Khan, Thailand
    861.9×
  114. 114ArucasCanary Islands, Spain
    861.9×
  115. 115Nong KhaemBangkok, Thailand
    851.8×
  116. 115AronaCanary Islands, Spain
    851.8×
  117. 117Puente AltoSantiago Metropolitan, Chile
    851.8×
  118. 118JeddahMecca Region, Saudi Arabia
    851.8×
  119. 119LublinLublin, Poland
    851.8×
  120. 120Ban Samae DamBangkok, Thailand
    851.8×
  121. 120Puerto MonttLos Lagos Region, Chile
    851.8×
  122. 120LimaLima Province, Peru
    851.8×
  123. 120GuadalajaraJalisco, Mexico
    851.8×
  124. 124AlexandriaAlexandria, Egypt
    841.8×
  125. 124PirotCentral Serbia, Serbia
    841.8×
  126. 124QuillotaValparaiso, Chile
    841.8×
  127. 127XonacatlánMéxico, Mexico
    841.8×
  128. 127ZapopanJalisco, Mexico
    841.8×
  129. 129Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    841.8×
  130. 130Bang KapiBangkok, Thailand
    831.8×
  131. 131PančevoVojvodina, Serbia
    831.8×
  132. 132Laem ChabangChon Buri, Thailand
    831.7×
  133. 133Sai MaiBangkok, Thailand
    821.7×
  134. 134Nakhon PathomNakhon Pathom, Thailand
    821.7×
  135. 135TolucaMéxico, Mexico
    821.7×
  136. 135CholulaPuebla, Mexico
    821.7×
  137. 135TijuanaBaja California, Mexico
    821.7×
  138. 138BangkokBangkok, Thailand
    821.7×
  139. 138Saphan SungBangkok, Thailand
    821.7×
  140. 140Lak SiBangkok, Thailand
    821.7×
  141. 141OstravaMoravian-Silesian Region, Czechia
    821.7×
  142. 141LinaresMaule Region, Chile
    821.7×
  143. 141CuricóMaule Region, Chile
    821.7×
  144. 144SremčicaCentral Serbia, Serbia
    811.7×
  145. 144BurbankCalifornia, United States
    811.7×
  146. 146Santa Cruz de la PalmaCanary Islands, Spain
    811.7×
  147. 147Khan Na YaoBangkok, Thailand
    801.7×
  148. 148KościanGreater Poland, Poland
    801.7×
  149. 148San Francisco TlalcilalcalpanMéxico, Mexico
    801.7×
  150. 150Bueng KumBangkok, Thailand
    791.6×
  151. 151SaraburiSaraburi, Thailand
    791.6×
  152. 151LincolnNebraska, United States
    791.6×
  153. 153West FargoNorth Dakota, United States
    791.6×
  154. 154RengoO'Higgins Region, Chile
    791.6×
  155. 155TrangTrang, Thailand
    781.6×
  156. 155Czechowice-DziedziceSilesia, Poland
    781.6×
  157. 157Mueang NonthaburiNonthaburi, Thailand
    771.6×
  158. 158Ban ChangRayong, Thailand
    771.5×
  159. 158ŽideniceSouth Moravian, Czechia
    771.5×
  160. 160Surat ThaniSurat Thani, Thailand
    771.5×
  161. 160OpoleOpole Voivodeship, Poland
    771.5×
  162. 160IrapuatoGuanajuato, Mexico
    771.5×
  163. 163HavířovMoravian-Silesian Region, Czechia
    771.5×
  164. 163Carsonlow-cost sensorsCalifornia, United States
    771.5×
  165. 165Nong ChokBangkok, Thailand
    761.5×
  166. 166Samut SakhonSamut Sakhon, Thailand
    761.5×
  167. 167OtwockMazovia, Poland
    761.5×
  168. 167Český TěšínMoravian-Silesian Region, Czechia
    761.5×
  169. 169ConcónValparaiso, Chile
    761.5×
  170. 170Khlong LuangPathum Thani, Thailand
    751.5×
  171. 171RadomMazovia, Poland
    751.5×
  172. 171Ban Khlong PrawetBangkok, Thailand
    751.5×
  173. 171BrnoSouth Moravian, Czechia
    751.5×
  174. 171AricaArica y Parinacota Region, Chile
    751.5×
  175. 175CuencaCastille-La Mancha, Spain
    751.5×
  176. 175QuinteroValparaiso, Chile
    751.5×
  177. 175CopiapóAtacama, Chile
    751.5×
  178. 178StarachowiceŚwiętokrzyskie, Poland
    741.4×
  179. 178KłodzkoLower Silesia, Poland
    741.4×
  180. 178Ciudad Benito JuárezNuevo León, Mexico
    741.4×
  181. 178Lomitalow-cost sensorsCalifornia, United States
    741.4×
  182. 178Lat KrabangBangkok, Thailand
    741.4×
  183. 183VisbyGotland, Sweden
    741.4×
  184. 183TemucoAraucania, Chile
    741.4×
  185. 185Bang Bo DistrictSamut Prakan, Thailand
    741.4×
  186. 185Novi SadVojvodina, Serbia
    741.4×
  187. 185TocopillaAntofagasta, Chile
    741.4×
  188. 188Torrancelow-cost sensorsCalifornia, United States
    741.4×
  189. 189ChisinauChișinău Municipality, Moldova
    731.4×
  190. 189TratTrat, Thailand
    731.4×
  191. 189FunchalMadeira, Portugal
    731.4×
  192. 189WrocławLower Silesia, Poland
    731.4×
  193. 189TalcaMaule Region, Chile
    731.4×
  194. 194ValenciaValencia, Spain
    731.4×
  195. 194ZnojmoSouth Moravian, Czechia
    731.4×
  196. 194ComptonCalifornia, United States
    731.4×
  197. 197CuranilahueBiobio, Chile
    731.4×
  198. 198BakuBaki, Azerbaijan
    731.4×
  199. 198BetongYala, Thailand
    731.4×
  200. 200Ban Talat BuengChon Buri, Thailand
    721.4×

Top 200 of 1,488 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, April 11, 2023, smogrank.com/history/2023-04-11 (accessed 2 Oct 2026).

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