SmogRank / History / March 24, 2023

Most polluted cities on March 24, 2023

1,385 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 97.0 µg/m³. Each city's own local calendar day.

← N'Djamena 97.0 µg/m³ 90 µg/m³15 WHO 24-hour guideline
Every city ranked for March 24, 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
    1806.5×
  2. 2KhartoumKhartoum, Sudan
    1745.9×
  3. 3ReykjavíkCapital Region, Iceland
    1634.8×
  4. 4BamakoBamako, Mali
    1614.7×
  5. 5DelhiDelhi, India
    1604.6×
  6. 6AlexandriaAlexandria, Egypt
    1574.2×
  7. 7Karachilow-cost sensorsSindh, Pakistan
    1554.0×
  8. 8CholulaPuebla, Mexico
    1323.2×
  9. 9BaghdadBaghdad, Iraq
    1323.2×
  10. 10San Francisco TlalcilalcalpanMéxico, Mexico
    1263.0×
  11. 11Abujalow-cost sensorsFCT, Nigeria
    1182.8×
  12. 12Kampalalow-cost sensorsCentral Region, Uganda
    1092.6×
  13. 13TalcaMaule Region, Chile
    1072.5×
  14. 13CuricóMaule Region, Chile
    1072.5×
  15. 15Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1062.5×
  16. 16RancaguaO'Higgins Region, Chile
    1052.5×
  17. 17Kathmandulow-cost sensorsBagmati Province, Nepal
    1032.4×
  18. 18Ciudad Benito JuárezNuevo León, Mexico
    1032.4×
  19. 19SantiagoSantiago Metropolitan, Chile
    1012.4×
  20. 20TalaganteSantiago Metropolitan, Chile
    1002.4×
  21. 21Lahorelow-cost sensorsPunjab, Pakistan
    992.3×
  22. 22San CarlosÑuble, Chile
    972.3×
  23. 22LinaresMaule Region, Chile
    972.3×
  24. 24Viña del MarValparaiso, Chile
    972.3×
  25. 25GarcíaNuevo León, Mexico
    972.2×
  26. 26San Salvador TizatlalliMéxico, Mexico
    962.2×
  27. 27RengoO'Higgins Region, Chile
    952.2×
  28. 28NišCentral Serbia, Serbia
    952.2×
  29. 28CelayaGuanajuato, Mexico
    952.2×
  30. 30ChillánÑuble, Chile
    932.1×
  31. 31QuinteroValparaiso, Chile
    912.0×
  32. 32AthensGeorgia, United States
    912.0×
  33. 33MexicaliBaja California, Mexico
    912.0×
  34. 34ConcónValparaiso, Chile
    902.0×
  35. 35HualpénBiobio, Chile
    902.0×
  36. 35ZapopanJalisco, Mexico
    902.0×
  37. 37BakuBaki, Azerbaijan
    881.9×
  38. 38NacimientoBiobio, Chile
    881.9×
  39. 39ChisinauChișinău Municipality, Moldova
    871.9×
  40. 39Puente AltoSantiago Metropolitan, Chile
    871.9×
  41. 41Şabāḩ as SālimMubārak al Kabīr, Kuwait
    871.9×
  42. 42Islamabadlow-cost sensorsIslamabad, Pakistan
    861.9×
  43. 43DushanbeDushanbe, Tajikistan
    861.9×
  44. 44Santa CatarinaNuevo León, Mexico
    861.8×
  45. 45Los ÁngelesBiobio, Chile
    851.8×
  46. 45CauquenesMaule Region, Chile
    851.8×
  47. 47SpartanburgSouth Carolina, United States
    851.8×
  48. 48TolucaMéxico, Mexico
    851.8×
  49. 48San Mateo AtencoMéxico, Mexico
    851.8×
  50. 50Ga-RankuwaNorth West, South Africa
    851.8×
  51. 51LublinLublin, Poland
    841.8×
  52. 52Mexico CityMexico City, Mexico
    831.8×
  53. 53Ciudad NezahualcoyotlMéxico, Mexico
    831.8×
  54. 54Puerto VarasLos Lagos Region, Chile
    831.7×
  55. 55PueblaPuebla, Mexico
    821.7×
  56. 56Naucalpan de JuárezMéxico, Mexico
    821.7×
  57. 57Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    821.7×
  58. 58Ciudad ApodacaNuevo León, Mexico
    811.7×
  59. 59KošiceKošice Region, Slovakia
    801.7×
  60. 60VeracruzVeracruz, Mexico
    801.6×
  61. 61TrenčínTrenčín Region, Slovakia
    801.6×
  62. 61XonacatlánMéxico, Mexico
    801.6×
  63. 63JeddahMecca Region, Saudi Arabia
    801.6×
  64. 63SalorTashkent Region, Uzbekistan
    801.6×
  65. 65DunaújvárosFejér, Hungary
    801.6×
  66. 66La UniónLos Ríos Region, Chile
    791.6×
  67. 66GreenvilleSouth Carolina, United States
    791.6×
  68. 68CoronelBiobio, Chile
    791.6×
  69. 69LimaLima Province, Peru
    791.6×
  70. 70HualquiBiobio, Chile
    781.6×
  71. 71SenicaTrnava Region, Slovakia
    781.6×
  72. 72ValenciaValencia, Spain
    771.6×
  73. 72RužomberokŽilina Region, Slovakia
    771.6×
  74. 74KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    771.5×
  75. 74Santo AndréSão Paulo, Brazil
    771.5×
  76. 74Guatemala CityGuatemala, Guatemala
    771.5×
  77. 77TrentoTrentino-Alto Adige, Italy
    761.5×
  78. 77TalcahuanoBiobio, Chile
    761.5×
  79. 79TlaxcalaTlaxcala, Mexico
    761.5×
  80. 80La SerenaCoquimbo Region, Chile
    761.5×
  81. 81CraiovaDolj, Romania
    751.5×
  82. 82ZvolenBanská Bystrica Region, Slovakia
    751.5×
  83. 82Banská BystricaBanská Bystrica Region, Slovakia
    751.5×
  84. 84CoyhaiqueAysén, Chile
    751.5×
  85. 85EtwatwaGauteng, South Africa
    751.5×
  86. 86BelgradeCentral Serbia, Serbia
    741.4×
  87. 87Vranov nad TopľouPrešov Region, Slovakia
    741.4×
  88. 87MartinŽilina Region, Slovakia
    741.4×
  89. 87San Pedro de la PazBiobio, Chile
    741.4×
  90. 90ModugnoApulia, Italy
    741.4×
  91. 91Yerevanlow-cost sensorsYerevan, Armenia
    731.4×
  92. 91HumennéPrešov Region, Slovakia
    731.4×
  93. 93BurrianaValencia, Spain
    731.4×
  94. 93ŽilinaŽilina Region, Slovakia
    731.4×
  95. 95TrnavaTrnava Region, Slovakia
    731.4×
  96. 95Túxpam de Rodríguez CanoVeracruz, Mexico
    731.4×
  97. 97LimeiraSão Paulo, Brazil
    721.4×
  98. 97Puerto MonttLos Lagos Region, Chile
    721.4×
  99. 99PrešovPrešov Region, Slovakia
    721.4×
  100. 99Pachuca de SotoHidalgo, Mexico
    721.4×
  101. 101BeneventoCampania, Italy
    721.4×
  102. 102GuadalajaraJalisco, Mexico
    721.3×
  103. 103ValdiviaLos Ríos Region, Chile
    711.3×
  104. 104CoquimboCoquimbo Region, Chile
    711.3×
  105. 105PristinaPristina, Kosovo
    711.3×
  106. 105BolzanoTrentino-Alto Adige, Italy
    711.3×
  107. 105MinatitlánVeracruz, Mexico
    711.3×
  108. 108RabinalBaja Verapaz, Guatemala
    711.3×
  109. 108ConcepciónBiobio, Chile
    711.3×
  110. 108AricaArica y Parinacota Region, Chile
    711.3×
  111. 111Tepeji del Río de OcampoHidalgo, Mexico
    711.3×
  112. 112BrakpanGauteng, South Africa
    701.3×
  113. 112Santiago de QuerétaroQuerétaro, Mexico
    701.3×
  114. 114GrazStyria, Austria
    701.3×
  115. 115OndaValencia, Spain
    701.3×
  116. 115Briton FerryWales, United Kingdom
    701.3×
  117. 115BratislavaBratislava Region, Slovakia
    701.3×
  118. 115CampinasSão Paulo, Brazil
    701.3×
  119. 119ThessaloníkiCentral Macedonia, Greece
    701.3×
  120. 119NitraNitra Region, Slovakia
    701.3×
  121. 121CuranilahueBiobio, Chile
    701.3×
  122. 122IaşiIași County, Romania
    691.3×
  123. 122Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    691.3×
  124. 122IngenioCanary Islands, Spain
    691.3×
  125. 122PrievidzaTrenčín Region, Slovakia
    691.3×
  126. 122PartizánskeTrenčín Region, Slovakia
    691.3×
  127. 122ChiguayanteBiobio, Chile
    691.3×
  128. 122AntofagastaAntofagasta, Chile
    691.3×
  129. 122San Luis de la PazGuanajuato, Mexico
    691.3×
  130. 130Ferraz de VasconcelosSão Paulo, Brazil
    691.3×
  131. 130TemucoAraucania, Chile
    691.3×
  132. 130Villa Poeta José Gálvez BarrenecheaLima region, Peru
    691.3×
  133. 130SalamancaGuanajuato, Mexico
    691.3×
  134. 134Rio ClaroSão Paulo, Brazil
    691.3×
  135. 135AntananarivoAnalamanga, Madagascar
    691.2×
  136. 136WolfsbergCarinthia, Austria
    691.2×
  137. 136Puerto AysénAysén, Chile
    691.2×
  138. 136LotaBiobio, Chile
    691.2×
  139. 136CopiapóAtacama, Chile
    691.2×
  140. 140BucharestBucharest, Romania
    691.2×
  141. 140ŁukówLublin, Poland
    691.2×
  142. 140Klagenfurt am WörtherseeCarinthia, Austria
    691.2×
  143. 140CalamaAntofagasta, Chile
    691.2×
  144. 144Winston-SalemNorth Carolina, United States
    681.2×
  145. 145AthensAttica, Greece
    681.2×
  146. 145Botevgradlow-cost sensorsSofia, Bulgaria
    681.2×
  147. 145Jastrzębie ZdrójSilesia, Poland
    681.2×
  148. 148ZnojmoSouth Moravian, Czechia
    681.2×
  149. 148Cadereyta JiménezNuevo León, Mexico
    681.2×
  150. 150Dimitrovgradlow-cost sensorsHaskovo, Bulgaria
    681.2×
  151. 150Granadilla de AbonaCanary Islands, Spain
    681.2×
  152. 150GainesvilleGeorgia, United States
    681.2×
  153. 150LexingtonNorth Carolina, United States
    681.2×
  154. 154Ribeirão PretoSão Paulo, Brazil
    671.2×
  155. 155MitrovicëMitrovica, Kosovo
    671.2×
  156. 155MumbaiMaharashtra, India
    671.2×
  157. 155Warner RobinsGeorgia, United States
    671.2×
  158. 158MorrisvilleNorth Carolina, United States
    671.2×
  159. 159São PauloSão Paulo, Brazil
    671.2×
  160. 159JundiaíSão Paulo, Brazil
    671.2×
  161. 159LawrencevilleGeorgia, United States
    671.2×
  162. 162SzegedCsongrád, Hungary
    661.2×
  163. 162GreensboroNorth Carolina, United States
    661.2×
  164. 164SliemaTas-Sliema, Malta
    661.2×
  165. 165EdinburgTexas, United States
    661.1×
  166. 166GyőrGyőr-Moson-Sopron, Hungary
    661.1×
  167. 166CalpulalpanTlaxcala, Mexico
    661.1×
  168. 166Phenix CityAlabama, United States
    661.1×
  169. 166ClemmonsNorth Carolina, United States
    661.1×
  170. 170KlosterneuburgLower Austria, Austria
    651.1×
  171. 171AlbanyGeorgia, United States
    651.1×
  172. 172MonterreyNuevo León, Mexico
    651.1×
  173. 173BloemfonteinFree State, South Africa
    651.1×
  174. 173Saint AndrewsSouth Carolina, United States
    651.1×
  175. 175MödlingLower Austria, Austria
    641.1×
  176. 175GuaratinguetáSão Paulo, Brazil
    641.1×
  177. 175Ciudad General EscobedoNuevo León, Mexico
    641.1×
  178. 175CharlotteNorth Carolina, United States
    641.1×
  179. 179MaconGeorgia, United States
    641.1×
  180. 180PejëPec, Kosovo
    641.1×
  181. 180ŽideniceSouth Moravian, Czechia
    641.1×
  182. 180TaubatéSão Paulo, Brazil
    641.1×
  183. 183Sevlievolow-cost sensorsGabrovo, Bulgaria
    641.1×
  184. 183La OrotavaCanary Islands, Spain
    641.1×
  185. 185HavířovMoravian-Silesian Region, Czechia
    631.1×
  186. 185RoveretoTrentino-Alto Adige, Italy
    631.1×
  187. 185Ciudad JuárezChihuahua, Mexico
    631.1×
  188. 185BrownsvilleTexas, United States
    631.1×
  189. 189AsprópyrgosAttica, Greece
    631.0×
  190. 189Cluj-NapocaCluj County, Romania
    631.0×
  191. 189RacibórzSilesia, Poland
    631.0×
  192. 189BenicàssimValencia, Spain
    631.0×
  193. 189PennsaukenNew Jersey, United States
    631.0×
  194. 194SninaPrešov Region, Slovakia
    631.0×
  195. 194MaspalomasCanary Islands, Spain
    631.0×
  196. 194ViennaVienna, Austria
    631.0×
  197. 194KrakówLesser Poland, Poland
    631.0×
  198. 194HueytownAlabama, United States
    631.0×
  199. 199SantosSão Paulo, Brazil
    631.0×
  200. 200Lagoslow-cost sensorsLagos, Nigeria
    631.0×

Top 200 of 1,385 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

Use this board

SmogRank, most polluted cities, PM2.5, March 24, 2023, smogrank.com/history/2023-03-24 (accessed 2 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.