SmogRank / History / March 21, 2023

Most polluted cities on March 21, 2023

1,380 cities ranked by their average PM2.5 over the day; the worst was Peshawar, Pakistan, at 76.5 µg/m³. Each city's own local calendar day.

Bad-air episodes during March 21, 2023. All episodes.

← Peshawar 76.5 µg/m³ 70 µg/m³15 WHO 24-hour guideline
Every city ranked for March 21, 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. 1Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1665.1×
  2. 2BamakoBamako, Mali
    1624.8×
  3. 3ReykjavíkCapital Region, Iceland
    1554.0×
  4. 4N'DjamenaN’Djaména, Chad
    1493.7×
  5. 5Lahorelow-cost sensorsPunjab, Pakistan
    1453.6×
  6. 5AlbanyGeorgia, United States
    1453.6×
  7. 7DelhiDelhi, India
    1353.3×
  8. 8AlexandriaAlexandria, Egypt
    1323.2×
  9. 8ChisinauChișinău Municipality, Moldova
    1323.2×
  10. 10TlaquepaqueJalisco, Mexico
    1222.9×
  11. 11Ciudad Benito JuárezNuevo León, Mexico
    1212.9×
  12. 12TurinPiedmont, Italy
    1212.9×
  13. 13NišCentral Serbia, Serbia
    1192.9×
  14. 14Jastrzębie ZdrójSilesia, Poland
    1172.8×
  15. 15Islamabadlow-cost sensorsIslamabad, Pakistan
    1152.8×
  16. 16Abujalow-cost sensorsFCT, Nigeria
    1112.6×
  17. 17AlessandriaPiedmont, Italy
    1052.5×
  18. 18AnconaThe Marches, Italy
    1042.4×
  19. 19AthensAttica, Greece
    1042.4×
  20. 20TarnówLesser Poland, Poland
    982.3×
  21. 21OtwockMazovia, Poland
    982.3×
  22. 22SalorTashkent Region, Uzbekistan
    972.2×
  23. 23IaşiIași County, Romania
    972.2×
  24. 24Santa CatarinaNuevo León, Mexico
    962.2×
  25. 25LuganoTicino, Switzerland
    962.2×
  26. 25Phenix CityAlabama, United States
    962.2×
  27. 27CoyhaiqueAysén, Chile
    952.2×
  28. 28ŁaskŁódź Voivodeship, Poland
    952.2×
  29. 29San Francisco TlalcilalcalpanMéxico, Mexico
    952.2×
  30. 30CelayaGuanajuato, Mexico
    942.2×
  31. 31JohannesburgGauteng, South Africa
    942.1×
  32. 31Banja LukaSrpska, Bosnia and Herzegovina
    942.1×
  33. 33GarcíaNuevo León, Mexico
    942.1×
  34. 34Ga-RankuwaNorth West, South Africa
    932.1×
  35. 35SiedlceMazovia, Poland
    932.1×
  36. 36TrentoTrentino-Alto Adige, Italy
    932.1×
  37. 36CholulaPuebla, Mexico
    932.1×
  38. 38Frýdek-MístekMoravian-Silesian Region, Czechia
    922.1×
  39. 39Puerto VarasLos Lagos Region, Chile
    922.1×
  40. 40LublinLublin, Poland
    912.1×
  41. 40Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    912.1×
  42. 40Gómez PalacioDurango, Mexico
    912.1×
  43. 43ClintonIowa, United States
    902.0×
  44. 44LawrencevilleGeorgia, United States
    902.0×
  45. 45RengoO'Higgins Region, Chile
    892.0×
  46. 46Spišská Nová VesKošice Region, Slovakia
    892.0×
  47. 46San Mateo AtencoMéxico, Mexico
    892.0×
  48. 48MaconGeorgia, United States
    881.9×
  49. 49RacibórzSilesia, Poland
    871.9×
  50. 49Jelenia GóraLower Silesia, Poland
    871.9×
  51. 51BelgradeCentral Serbia, Serbia
    871.9×
  52. 51Falconara MarittimaThe Marches, Italy
    871.9×
  53. 53KutnoŁódź Voivodeship, Poland
    871.9×
  54. 54ConakryConakry, Guinea
    871.9×
  55. 54Czechowice-DziedziceSilesia, Poland
    871.9×
  56. 56KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    861.9×
  57. 57KrakówLesser Poland, Poland
    861.9×
  58. 58ŽilinaŽilina Region, Slovakia
    861.9×
  59. 59KrosnoSubcarpathia, Poland
    861.9×
  60. 60HattiesburgMississippi, United States
    861.8×
  61. 61Botevgradlow-cost sensorsSofia, Bulgaria
    851.8×
  62. 62KościanGreater Poland, Poland
    851.8×
  63. 63SasolburgFree State, South Africa
    841.8×
  64. 64MielecSubcarpathia, Poland
    841.8×
  65. 64ErmeloMpumalanga, South Africa
    841.8×
  66. 66RancaguaO'Higgins Region, Chile
    841.8×
  67. 67EtwatwaGauteng, South Africa
    841.8×
  68. 68ŻyrardówMazovia, Poland
    831.8×
  69. 69RzeszówSubcarpathia, Poland
    831.7×
  70. 70KatowiceSilesia, Poland
    831.7×
  71. 71AsprópyrgosAttica, Greece
    821.7×
  72. 71MonterreyNuevo León, Mexico
    821.7×
  73. 73Valašské MeziříčíZlín, Czechia
    821.7×
  74. 74JarosławSubcarpathia, Poland
    821.7×
  75. 74ThembisaGauteng, South Africa
    821.7×
  76. 76ThessaloníkiCentral Macedonia, Greece
    821.7×
  77. 77EmalahleniMpumalanga, South Africa
    821.7×
  78. 77KłodzkoLower Silesia, Poland
    821.7×
  79. 79Bielsko-BialaSilesia, Poland
    811.7×
  80. 79Puerto AysénAysén, Chile
    811.7×
  81. 79BirminghamAlabama, United States
    811.7×
  82. 82KhartoumKhartoum, Sudan
    811.7×
  83. 82RoveretoTrentino-Alto Adige, Italy
    811.7×
  84. 84KlerksdorpNorth West, South Africa
    811.7×
  85. 84BeneventoCampania, Italy
    811.7×
  86. 86BucharestBucharest, Romania
    811.7×
  87. 86ZapopanJalisco, Mexico
    811.7×
  88. 88Karachilow-cost sensorsSindh, Pakistan
    801.7×
  89. 88TolucaMéxico, Mexico
    801.7×
  90. 90WrocławLower Silesia, Poland
    801.6×
  91. 91San Salvador TizatlalliMéxico, Mexico
    801.6×
  92. 92NaplesCampania, Italy
    801.6×
  93. 92San CarlosÑuble, Chile
    801.6×
  94. 94NiskoSubcarpathia, Poland
    801.6×
  95. 94BellinzonaTicino, Switzerland
    801.6×
  96. 96Pachuca de SotoHidalgo, Mexico
    791.6×
  97. 96SantiagoSantiago Metropolitan, Chile
    791.6×
  98. 98ChillánÑuble, Chile
    791.6×
  99. 99XonacatlánMéxico, Mexico
    791.6×
  100. 100TokozaGauteng, South Africa
    791.6×
  101. 101PiraeusAttica, Greece
    791.6×
  102. 101Puente AltoSantiago Metropolitan, Chile
    791.6×
  103. 103RadomMazovia, Poland
    781.6×
  104. 103Český TěšínMoravian-Silesian Region, Czechia
    781.6×
  105. 103NacimientoBiobio, Chile
    781.6×
  106. 106RuseRuse, Bulgaria
    781.6×
  107. 106JesiThe Marches, Italy
    781.6×
  108. 106TallahasseeFlorida, United States
    781.6×
  109. 109JasłoSubcarpathia, Poland
    771.6×
  110. 109MartinŽilina Region, Slovakia
    771.6×
  111. 109LinaresMaule Region, Chile
    771.6×
  112. 112ZamośćLublin, Poland
    771.5×
  113. 112ColomboWestern Province, Sri Lanka
    771.5×
  114. 112HavířovMoravian-Silesian Region, Czechia
    771.5×
  115. 115Los ÁngelesBiobio, Chile
    771.5×
  116. 115MolineIllinois, United States
    771.5×
  117. 117BaghdadBaghdad, Iraq
    771.5×
  118. 118ZgierzŁódź Voivodeship, Poland
    771.5×
  119. 119PristinaPristina, Kosovo
    771.5×
  120. 119HamiltonOntario, Canada
    771.5×
  121. 121WłocławekKujawsko-Pomorskie, Poland
    761.5×
  122. 122Puerto del RosarioCanary Islands, Spain
    761.5×
  123. 122MexicaliBaja California, Mexico
    761.5×
  124. 124Dimitrovgradlow-cost sensorsHaskovo, Bulgaria
    761.5×
  125. 124TrenčínTrenčín Region, Slovakia
    761.5×
  126. 124ZlínZlín, Czechia
    761.5×
  127. 127PułtuskMazovia, Poland
    761.5×
  128. 127TeltowBrandenburg, Germany
    761.5×
  129. 127TalaganteSantiago Metropolitan, Chile
    761.5×
  130. 130PrešovPrešov Region, Slovakia
    761.5×
  131. 131La UniónLos Ríos Region, Chile
    751.5×
  132. 132Haskovolow-cost sensorsHaskovo, Bulgaria
    751.5×
  133. 132ToméBiobio, Chile
    751.5×
  134. 134CraiovaDolj, Romania
    751.5×
  135. 134OstravaMoravian-Silesian Region, Czechia
    751.5×
  136. 136AntananarivoAnalamanga, Madagascar
    751.5×
  137. 136OpoleOpole Voivodeship, Poland
    751.5×
  138. 138KošiceKošice Region, Slovakia
    741.4×
  139. 138Ciudad General EscobedoNuevo León, Mexico
    741.4×
  140. 140TalcaMaule Region, Chile
    741.4×
  141. 140SalamancaGuanajuato, Mexico
    741.4×
  142. 142BerlinState of Berlin, Germany
    741.4×
  143. 142HualpénBiobio, Chile
    741.4×
  144. 142Ciudad ApodacaNuevo León, Mexico
    741.4×
  145. 145Warner RobinsGeorgia, United States
    731.4×
  146. 146HualquiBiobio, Chile
    731.4×
  147. 146DavenportIowa, United States
    731.4×
  148. 148Kathmandulow-cost sensorsBagmati Province, Nepal
    731.4×
  149. 149Cluj-NapocaCluj County, Romania
    731.4×
  150. 149Sevlievolow-cost sensorsGabrovo, Bulgaria
    731.4×
  151. 151TocopillaAntofagasta, Chile
    731.4×
  152. 151CuricóMaule Region, Chile
    731.4×
  153. 153PrzemyślSubcarpathia, Poland
    721.4×
  154. 153Santo AndréSão Paulo, Brazil
    721.4×
  155. 153CoronelBiobio, Chile
    721.4×
  156. 156QuinteroValparaiso, Chile
    721.4×
  157. 156RockfordIllinois, United States
    721.4×
  158. 158BolzanoTrentino-Alto Adige, Italy
    721.4×
  159. 158Viña del MarValparaiso, Chile
    721.4×
  160. 160AricaArica y Parinacota Region, Chile
    721.4×
  161. 160MadisonWisconsin, United States
    721.4×
  162. 162MitrovicëMitrovica, Kosovo
    721.3×
  163. 163McDonoughGeorgia, United States
    711.3×
  164. 164HumennéPrešov Region, Slovakia
    711.3×
  165. 164CuranilahueBiobio, Chile
    711.3×
  166. 166GlogovacPristina, Kosovo
    711.3×
  167. 166BrakpanGauteng, South Africa
    711.3×
  168. 166Bernau bei BerlinBrandenburg, Germany
    711.3×
  169. 166PartizánskeTrenčín Region, Slovakia
    711.3×
  170. 166CauquenesMaule Region, Chile
    711.3×
  171. 171MumbaiMaharashtra, India
    711.3×
  172. 171MiędzyrzeczLubusz, Poland
    711.3×
  173. 171TemucoAraucania, Chile
    711.3×
  174. 171TalcahuanoBiobio, Chile
    711.3×
  175. 171QuillotaValparaiso, Chile
    711.3×
  176. 171San Luis PotosíSan Luis Potosí, Mexico
    711.3×
  177. 171San Pedro de la PazBiobio, Chile
    711.3×
  178. 178PejëPec, Kosovo
    711.3×
  179. 179EberswaldeBrandenburg, Germany
    701.3×
  180. 179ŁódźŁódź Voivodeship, Poland
    701.3×
  181. 179PueblaPuebla, Mexico
    701.3×
  182. 182Tepeji del Río de OcampoHidalgo, Mexico
    701.3×
  183. 182Prince GeorgeBritish Columbia, Canada
    701.3×
  184. 184WawerMazovia, Poland
    701.3×
  185. 184TrussvilleAlabama, United States
    701.3×
  186. 186CottbusBrandenburg, Germany
    701.3×
  187. 187Frankfurt (Oder)Brandenburg, Germany
    701.3×
  188. 188PascagoulaMississippi, United States
    691.3×
  189. 189PrievidzaTrenčín Region, Slovakia
    691.2×
  190. 190PotsdamBrandenburg, Germany
    691.2×
  191. 190KrapkowiceOpole Voivodeship, Poland
    691.2×
  192. 192SoshanguveGauteng, South Africa
    691.2×
  193. 192ConcónValparaiso, Chile
    691.2×
  194. 194WittenbergeBrandenburg, Germany
    681.2×
  195. 194Blankenfelde-MahlowBrandenburg, Germany
    681.2×
  196. 196NeuenhagenBrandenburg, Germany
    681.2×
  197. 197ŁukówLublin, Poland
    681.2×
  198. 197ZvolenBanská Bystrica Region, Slovakia
    681.2×
  199. 197PesaroThe Marches, Italy
    681.2×
  200. 200Yerevanlow-cost sensorsYerevan, Armenia
    681.2×

Top 200 of 1,380 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 21, 2023, smogrank.com/history/2023-03-21 (accessed 2 Oct 2026).

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