SmogRank / History / March 21, 2024

Most polluted cities on March 21, 2024

901 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 120.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during March 21, 2024. All episodes.

← N'Djamena 120.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for March 21, 2024, 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
    1968.0×
  2. 2Kathmandulow-cost sensorsBagmati Province, Nepal
    1826.6×
  3. 3Lahorelow-cost sensorsPunjab, Pakistan
    1776.2×
  4. 4Kampalalow-cost sensorsCentral Region, Uganda
    1756.0×
  5. 5TlaquepaqueJalisco, Mexico
    1756.0×
  6. 6DelhiDelhi, India
    1644.9×
  7. 7Dhakalow-cost sensorsDhaka Division, Bangladesh
    1574.2×
  8. 8DziałdowoWarmia-Masuria, Poland
    1564.2×
  9. 9DębicaSubcarpathia, Poland
    1554.0×
  10. 10LublinLublin, Poland
    1544.0×
  11. 11Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1533.9×
  12. 12ŁaskŁódź Voivodeship, Poland
    1523.8×
  13. 13Islamabadlow-cost sensorsIslamabad, Pakistan
    1413.4×
  14. 13MumbaiMaharashtra, India
    1413.4×
  15. 15AstanaAstana, Kazakhstan
    1373.4×
  16. 16KrakówLesser Poland, Poland
    1363.3×
  17. 17GrajewoPodlasie, Poland
    1353.3×
  18. 17KaliszGreater Poland, Poland
    1353.3×
  19. 19HanoiHanoi, Vietnam
    1343.3×
  20. 20RacibórzSilesia, Poland
    1333.2×
  21. 21ŁukówLublin, Poland
    1323.2×
  22. 22ZgierzŁódź Voivodeship, Poland
    1323.2×
  23. 23Czechowice-DziedziceSilesia, Poland
    1293.1×
  24. 24KłodzkoLower Silesia, Poland
    1283.1×
  25. 25KatowiceSilesia, Poland
    1263.1×
  26. 26CairoCairo, Egypt
    1253.0×
  27. 27OpoleOpole Voivodeship, Poland
    1233.0×
  28. 28SiedlceMazovia, Poland
    1222.9×
  29. 29ZamośćLublin, Poland
    1212.9×
  30. 29PoznańGreater Poland, Poland
    1212.9×
  31. 31ColomboWestern Province, Sri Lanka
    1192.9×
  32. 32KościanGreater Poland, Poland
    1192.9×
  33. 33KutnoŁódź Voivodeship, Poland
    1172.8×
  34. 34WłocławekKujawsko-Pomorskie, Poland
    1172.8×
  35. 35LęborkPomerania, Poland
    1172.8×
  36. 36BydgoszczKujawsko-Pomorskie, Poland
    1152.8×
  37. 37RzeszówSubcarpathia, Poland
    1152.7×
  38. 37PrzemyślSubcarpathia, Poland
    1152.7×
  39. 37BirminghamAlabama, United States
    1152.7×
  40. 40HyderabadTelangana, India
    1142.7×
  41. 41NiskoSubcarpathia, Poland
    1142.7×
  42. 41Bielsko-BialaSilesia, Poland
    1142.7×
  43. 43Jastrzębie ZdrójSilesia, Poland
    1132.7×
  44. 44Mueang NonthaburiNonthaburi, Thailand
    1122.7×
  45. 45Karachilow-cost sensorsSindh, Pakistan
    1122.7×
  46. 45Banja LukaSrpska, Bosnia and Herzegovina
    1122.7×
  47. 47AugustówPodlasie, Poland
    1102.6×
  48. 48YangonYangon, Myanmar
    1092.6×
  49. 48Puerto MonttLos Lagos Region, Chile
    1092.6×
  50. 50Kędzierzyn-KoźleOpole Voivodeship, Poland
    1082.5×
  51. 51La UniónLos Ríos Region, Chile
    1062.5×
  52. 52KościerzynaPomerania, Poland
    1042.4×
  53. 53ElblągWarmia-Masuria, Poland
    1022.4×
  54. 54ŻywiecSilesia, Poland
    1022.4×
  55. 55WrocławLower Silesia, Poland
    1012.4×
  56. 55ColumbusGeorgia, United States
    1012.4×
  57. 57Forest ParkGeorgia, United States
    1012.4×
  58. 58Puente AltoSantiago Metropolitan, Chile
    992.3×
  59. 59SarajevoFederation of B&H, Bosnia and Herzegovina
    982.3×
  60. 60OsornoLos Lagos Region, Chile
    982.3×
  61. 61OlsztynWarmia-Masuria, Poland
    972.3×
  62. 62Ulan BatorUlaanbaatar, Mongolia
    962.2×
  63. 63Skarżysko-KamiennaŚwiętokrzyskie, Poland
    962.2×
  64. 64ErlinTaiwan, Taiwan
    962.2×
  65. 65PłockMazovia, Poland
    952.2×
  66. 66ToruńKujawsko-Pomorskie, Poland
    942.2×
  67. 67SuwałkiPodlasie, Poland
    942.1×
  68. 67ŁódźŁódź Voivodeship, Poland
    942.1×
  69. 67BytówPomerania, Poland
    942.1×
  70. 70GdyniaPomerania, Poland
    942.1×
  71. 71StarachowiceŚwiętokrzyskie, Poland
    922.1×
  72. 72PruszkówMazovia, Poland
    922.1×
  73. 72MaconGeorgia, United States
    922.1×
  74. 74LegionowoMazovia, Poland
    922.1×
  75. 75Strzelce OpolskieOpole Voivodeship, Poland
    912.1×
  76. 76AshgabatAshgabat, Turkmenistan
    912.0×
  77. 76JarosławSubcarpathia, Poland
    912.0×
  78. 76Accralow-cost sensorsGreater Accra, Ghana
    912.0×
  79. 79ZhushanTaiwan, Taiwan
    902.0×
  80. 80Zielona GóraLubusz, Poland
    902.0×
  81. 80RabinalBaja Verapaz, Guatemala
    902.0×
  82. 82KigaliKigali, Rwanda
    902.0×
  83. 82OtwockMazovia, Poland
    902.0×
  84. 82GdańskPomerania, Poland
    902.0×
  85. 85BaghdadBaghdad, Iraq
    902.0×
  86. 86AugustaGeorgia, United States
    902.0×
  87. 87Guatemala CityGuatemala, Guatemala
    892.0×
  88. 88ŚwiecieKujawsko-Pomorskie, Poland
    881.9×
  89. 89AlbanyGeorgia, United States
    881.9×
  90. 90CelayaGuanajuato, Mexico
    871.9×
  91. 90SavannahGeorgia, United States
    871.9×
  92. 92TrussvilleAlabama, United States
    871.9×
  93. 93AguascalientesAguascalientes, Mexico
    861.9×
  94. 94Phenix CityAlabama, United States
    861.9×
  95. 95San Luis de la PazGuanajuato, Mexico
    851.8×
  96. 95Saint AndrewsSouth Carolina, United States
    851.8×
  97. 97ŻyrardówMazovia, Poland
    851.8×
  98. 98PułtuskMazovia, Poland
    851.8×
  99. 99ErlunTaiwan, Taiwan
    841.8×
  100. 99SantiagoSantiago Metropolitan, Chile
    841.8×
  101. 101NacimientoBiobio, Chile
    841.8×
  102. 101KennesawGeorgia, United States
    841.8×
  103. 103Vientianelow-cost sensorsVientiane Prefecture, Laos
    841.8×
  104. 103YuanlinTaiwan, Taiwan
    841.8×
  105. 105DouliuTaiwan, Taiwan
    831.8×
  106. 106TalaganteSantiago Metropolitan, Chile
    831.8×
  107. 107Konstancin-JeziornaMazovia, Poland
    831.7×
  108. 107AntananarivoAnalamanga, Madagascar
    831.7×
  109. 109TainanTaiwan, Taiwan
    821.7×
  110. 109TaichungTaiwan, Taiwan
    821.7×
  111. 111MielecSubcarpathia, Poland
    821.7×
  112. 111Jelenia GóraLower Silesia, Poland
    821.7×
  113. 113HarrisonburgVirginia, United States
    821.7×
  114. 114LawrencevilleGeorgia, United States
    821.7×
  115. 115BiałystokPodlasie, Poland
    821.7×
  116. 115PuliTaiwan, Taiwan
    821.7×
  117. 117YongkangTaiwan, Taiwan
    811.7×
  118. 117SzczecinWest Pomerania, Poland
    811.7×
  119. 119NantouTaiwan, Taiwan
    811.7×
  120. 119RadomskoŁódź Voivodeship, Poland
    811.7×
  121. 119HueytownAlabama, United States
    811.7×
  122. 122BeigangTaiwan, Taiwan
    811.7×
  123. 123Puerto AysénAysén, Chile
    811.7×
  124. 124BuziTaiwan, Taiwan
    801.7×
  125. 124GainesvilleGeorgia, United States
    801.7×
  126. 126EłkWarmia-Masuria, Poland
    801.6×
  127. 126HualpénBiobio, Chile
    801.6×
  128. 128Ponte Vedra BeachFlorida, United States
    801.6×
  129. 129ToufenTaiwan, Taiwan
    801.6×
  130. 129ChanghuaTaiwan, Taiwan
    801.6×
  131. 129JacksonvilleFlorida, United States
    801.6×
  132. 132SalorTashkent Region, Uzbekistan
    801.6×
  133. 132Chiayi CityTaiwan, Taiwan
    801.6×
  134. 132AlgiersAlgiers, Algeria
    801.6×
  135. 135MiaoliTaiwan, Taiwan
    791.6×
  136. 135Warner RobinsGeorgia, United States
    791.6×
  137. 137RadomMazovia, Poland
    791.6×
  138. 137TaibaoTaiwan, Taiwan
    791.6×
  139. 139ZhudongTaiwan, Taiwan
    791.6×
  140. 139FlorenceSouth Carolina, United States
    791.6×
  141. 141CoyhaiqueAysén, Chile
    791.6×
  142. 142XizhouTaiwan, Taiwan
    791.6×
  143. 143WarsawMazovia, Poland
    781.6×
  144. 144HsinchuTaiwan, Taiwan
    781.6×
  145. 145TemucoAraucania, Chile
    771.6×
  146. 146KielceŚwiętokrzyskie, Poland
    771.5×
  147. 146Gorzów WielkopolskiLubusz, Poland
    771.5×
  148. 146AthensGeorgia, United States
    771.5×
  149. 149ChennaiTamil Nadu, India
    771.5×
  150. 149XinyingTaiwan, Taiwan
    771.5×
  151. 149RengoO'Higgins Region, Chile
    771.5×
  152. 152ManamaManama, Bahrain
    771.5×
  153. 153KołobrzegWest Pomerania, Poland
    771.5×
  154. 154HattiesburgMississippi, United States
    761.5×
  155. 155BrunswickGeorgia, United States
    761.5×
  156. 156WawerMazovia, Poland
    761.5×
  157. 157ValdostaGeorgia, United States
    761.5×
  158. 158ZhubeiTaiwan, Taiwan
    761.5×
  159. 158TocopillaAntofagasta, Chile
    761.5×
  160. 160San Andrés TuxtlaVeracruz, Mexico
    751.5×
  161. 161Candler-McAfeeGeorgia, United States
    741.4×
  162. 162Şabāḩ as SālimMubārak al Kabīr, Kuwait
    741.4×
  163. 162TarnówLesser Poland, Poland
    741.4×
  164. 164KaohsiungTakao, Taiwan
    741.4×
  165. 165Silao de la VictoriaGuanajuato, Mexico
    731.4×
  166. 165AtlantaGeorgia, United States
    731.4×
  167. 165CharlottesvilleVirginia, United States
    731.4×
  168. 168BakuBaki, Azerbaijan
    731.4×
  169. 168AricaArica y Parinacota Region, Chile
    731.4×
  170. 170McDonoughGeorgia, United States
    731.4×
  171. 171San Luis PotosíSan Luis Potosí, Mexico
    721.4×
  172. 172Imperial BeachCalifornia, United States
    721.4×
  173. 173TallahasseeFlorida, United States
    721.4×
  174. 174CuricóMaule Region, Chile
    711.3×
  175. 175Addis AbabaAddis Ababa, Ethiopia
    711.3×
  176. 176FengshanTakao, Taiwan
    711.3×
  177. 176QuinteroValparaiso, Chile
    711.3×
  178. 176CuranilahueBiobio, Chile
    711.3×
  179. 176SpringdaleArkansas, United States
    711.3×
  180. 180Fort SmithArkansas, United States
    701.3×
  181. 181ConcónValparaiso, Chile
    701.3×
  182. 181AntofagastaAntofagasta, Chile
    701.3×
  183. 183RancaguaO'Higgins Region, Chile
    691.3×
  184. 184QuillotaValparaiso, Chile
    691.3×
  185. 184HualquiBiobio, Chile
    691.3×
  186. 184CalamaAntofagasta, Chile
    691.3×
  187. 187Viña del MarValparaiso, Chile
    691.3×
  188. 188CoquimboCoquimbo Region, Chile
    691.2×
  189. 189ConwaySouth Carolina, United States
    691.2×
  190. 189FontanaCalifornia, United States
    691.2×
  191. 191CopiapóAtacama, Chile
    681.2×
  192. 192Santa Monicalow-cost sensorsCalifornia, United States
    681.2×
  193. 193OcalaFlorida, United States
    681.2×
  194. 194DaxiTaiwan, Taiwan
    681.2×
  195. 194ChillánÑuble, Chile
    681.2×
  196. 194Fruit CoveFlorida, United States
    681.2×
  197. 194JacksonMississippi, United States
    681.2×
  198. 194JenksOklahoma, United States
    681.2×
  199. 194Los AngelesCalifornia, United States
    681.2×
  200. 200QuilpuéValparaiso, Chile
    671.2×

Top 200 of 901 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

Not covered: the government monitoring networks of China and Turkey, which publish no terms that let us reuse their readings. Most cities there are missing from this board, not clean. Why.

Use this board

SmogRank, most polluted cities, PM2.5, March 21, 2024, smogrank.com/history/2024-03-21 (accessed 3 Oct 2026).

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