SmogRank / History / March 31, 2024

Most polluted cities on March 31, 2024

2,210 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 196.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during March 31, 2024. All episodes.

← N'Djamena 196.0 µg/m³ 150 µg/m³15 WHO 24-hour guideline
Every city ranked for March 31, 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
    27113.1×
  2. 2Mae SaiChiang Rai, Thailand
    2129.1×
  3. 3Chiang MaiChiang Mai, Thailand
    1796.3×
  4. 4PhayaoPhayao, Thailand
    1786.3×
  5. 5LamphunLamphun, Thailand
    1715.6×
  6. 6WittenbergSaxony-Anhalt, Germany
    1685.3×
  7. 7LampangLampang, Thailand
    1665.1×
  8. 8DelhiDelhi, India
    1655.0×
  9. 9Mae SotTak, Thailand
    1645.0×
  10. 9Chiang RaiChiang Rai, Thailand
    1645.0×
  11. 11Karachilow-cost sensorsSindh, Pakistan
    1644.9×
  12. 12NanNan, Thailand
    1604.6×
  13. 13DessauSaxony-Anhalt, Germany
    1584.3×
  14. 14TeltowBrandenburg, Germany
    1574.2×
  15. 15HanoiHanoi, Vietnam
    1564.2×
  16. 16Kamphaeng PhetKamphaeng Phet, Thailand
    1564.2×
  17. 16Kathmandulow-cost sensorsBagmati Province, Nepal
    1564.2×
  18. 18PhraePhrae, Thailand
    1554.1×
  19. 19BerlinState of Berlin, Germany
    1554.1×
  20. 20UttaraditUttaradit, Thailand
    1554.1×
  21. 21Königs WusterhausenBrandenburg, Germany
    1544.0×
  22. 22Ciudad JuárezChihuahua, Mexico
    1544.0×
  23. 23Bernau bei BerlinBrandenburg, Germany
    1533.8×
  24. 24SzczecinWest Pomerania, Poland
    1523.8×
  25. 25BeijingBeijing, China
    1523.8×
  26. 26Bitterfeld-WolfenSaxony-Anhalt, Germany
    1513.7×
  27. 27Frankfurt (Oder)Brandenburg, Germany
    1513.7×
  28. 28DěčínÚstí nad Labem Region, Czechia
    1483.6×
  29. 29LubnjowBrandenburg, Germany
    1483.6×
  30. 30Vientianelow-cost sensorsVientiane Prefecture, Laos
    1473.6×
  31. 31StrausbergBrandenburg, Germany
    1463.6×
  32. 32KladnoCentral Bohemia, Czechia
    1463.6×
  33. 33Gorzów WielkopolskiLubusz, Poland
    1453.5×
  34. 34České BudějoviceSouth Bohemian Region, Czechia
    1443.5×
  35. 35Blankenfelde-MahlowBrandenburg, Germany
    1433.5×
  36. 36CairoCairo, Egypt
    1423.5×
  37. 37PraguePrague, Czechia
    1393.4×
  38. 38SukhothaiSukhothai, Thailand
    1383.4×
  39. 39LuckenwaldeBrandenburg, Germany
    1383.4×
  40. 40Hradec KrálovéHradec Králové Region, Czechia
    1373.3×
  41. 41MukdahanMukdahan, Thailand
    1373.3×
  42. 42NeuenhagenBrandenburg, Germany
    1373.3×
  43. 43JakartaJakarta, Indonesia
    1343.3×
  44. 44ShanghaiShanghai, China
    1333.2×
  45. 45PotsdamBrandenburg, Germany
    1333.2×
  46. 46NaplesCampania, Italy
    1323.2×
  47. 47FalkenseeBrandenburg, Germany
    1313.2×
  48. 47EisenhüttenstadtBrandenburg, Germany
    1313.2×
  49. 49Halle (Saale)Saxony-Anhalt, Germany
    1303.1×
  50. 50HyderabadTelangana, India
    1293.1×
  51. 51Dhakalow-cost sensorsDhaka Division, Bangladesh
    1283.1×
  52. 51MostÚstí nad Labem Region, Czechia
    1283.1×
  53. 53KolkataWest Bengal, India
    1283.1×
  54. 53KalasinKalasin, Thailand
    1283.1×
  55. 55Schwedt (Oder)Brandenburg, Germany
    1273.1×
  56. 56BernburgSaxony-Anhalt, Germany
    1273.1×
  57. 57AltenburgThuringia, Germany
    1263.1×
  58. 58ShenyangLiaoning, China
    1263.0×
  59. 59BerounCentral Bohemia, Czechia
    1253.0×
  60. 60PardubicePardubice Region, Czechia
    1243.0×
  61. 60CoyhaiqueAysén, Chile
    1243.0×
  62. 62AlgiersAlgiers, Algeria
    1222.9×
  63. 63MumbaiMaharashtra, India
    1222.9×
  64. 63ZnojmoSouth Moravian, Czechia
    1222.9×
  65. 65LęborkPomerania, Poland
    1222.9×
  66. 66CottbusBrandenburg, Germany
    1212.9×
  67. 67CieszynSilesia, Poland
    1212.9×
  68. 68KleinmachnowBrandenburg, Germany
    1202.9×
  69. 69PilsenPlzeň Region, Czechia
    1192.9×
  70. 70BraunschweigLower Saxony, Germany
    1192.8×
  71. 71YasothonYasothon, Thailand
    1182.8×
  72. 72OldenburgLower Saxony, Germany
    1172.8×
  73. 73SalorTashkent Region, Uzbekistan
    1172.8×
  74. 73KadaňÚstí nad Labem Region, Czechia
    1172.8×
  75. 75Mladá BoleslavCentral Bohemia, Czechia
    1162.8×
  76. 76HildesheimLower Saxony, Germany
    1162.8×
  77. 77TřinecMoravian-Silesian Region, Czechia
    1162.8×
  78. 77Wodzisław ŚląskiSilesia, Poland
    1162.8×
  79. 77BihaćFederation of B&H, Bosnia and Herzegovina
    1162.8×
  80. 80Lahorelow-cost sensorsPunjab, Pakistan
    1152.8×
  81. 80SalzgitterLower Saxony, Germany
    1152.8×
  82. 80Jelenia GóraLower Silesia, Poland
    1152.8×
  83. 83Amnat CharoenAmnat Charoen, Thailand
    1152.7×
  84. 84DziałdowoWarmia-Masuria, Poland
    1152.7×
  85. 85OstravaMoravian-Silesian Region, Czechia
    1142.7×
  86. 86CapannoriTuscany, Italy
    1142.7×
  87. 87GeraThuringia, Germany
    1142.7×
  88. 88NordhausenThuringia, Germany
    1132.7×
  89. 89Novi PazarCentral Serbia, Serbia
    1132.7×
  90. 89ČadcaŽilina Region, Slovakia
    1132.7×
  91. 89KościerzynaPomerania, Poland
    1132.7×
  92. 92LitvínovÚstí nad Labem Region, Czechia
    1132.7×
  93. 93BaghdadBaghdad, Iraq
    1122.7×
  94. 94KöthenSaxony-Anhalt, Germany
    1122.7×
  95. 95Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1122.7×
  96. 96Brandenburg an der HavelBrandenburg, Germany
    1112.6×
  97. 96Ústí nad LabemÚstí nad Labem Region, Czechia
    1112.6×
  98. 96PoznańGreater Poland, Poland
    1112.6×
  99. 99KościanGreater Poland, Poland
    1112.6×
  100. 100TepliceÚstí nad Labem Region, Czechia
    1102.6×
  101. 101MartinŽilina Region, Slovakia
    1102.6×
  102. 102Ubon RatchathaniUbon Ratchathani, Thailand
    1102.6×
  103. 102MagdeburgSaxony-Anhalt, Germany
    1102.6×
  104. 104YangonYangon, Myanmar
    1082.6×
  105. 105KutnoŁódź Voivodeship, Poland
    1082.6×
  106. 106Schwandorf in BayernBavaria, Germany
    1072.5×
  107. 106HannoverLower Saxony, Germany
    1072.5×
  108. 108KanchanaburiKanchanaburi, Thailand
    1072.5×
  109. 109HavířovMoravian-Silesian Region, Czechia
    1062.5×
  110. 109El PasoTexas, United States
    1062.5×
  111. 111San Pawl il-BaħarSaint Paul’s Bay, Malta
    1062.5×
  112. 112OpavaMoravian-Silesian Region, Czechia
    1052.5×
  113. 113Burg bei MagdeburgSaxony-Anhalt, Germany
    1052.5×
  114. 114Frýdek-MístekMoravian-Silesian Region, Czechia
    1052.5×
  115. 115Chai NatChai Nat, Thailand
    1042.5×
  116. 115WłocławekKujawsko-Pomorskie, Poland
    1042.5×
  117. 117BogatyniaLower Silesia, Poland
    1042.4×
  118. 118BurghausenBavaria, Germany
    1042.4×
  119. 119PrievidzaTrenčín Region, Slovakia
    1032.4×
  120. 120PtujUrban Municipality of Ptuj, Slovenia
    1032.4×
  121. 121WeidenBavaria, Germany
    1032.4×
  122. 122GreizThuringia, Germany
    1022.4×
  123. 122WrocławLower Silesia, Poland
    1022.4×
  124. 124Valašské MeziříčíZlín, Czechia
    1022.4×
  125. 124LiberecLiberec Region, Czechia
    1022.4×
  126. 126Lop BuriLopburi, Thailand
    1012.4×
  127. 127PirotCentral Serbia, Serbia
    1012.4×
  128. 127LoeiLoei, Thailand
    1012.4×
  129. 127GdyniaPomerania, Poland
    1012.4×
  130. 130Udon ThaniUdon Thani, Thailand
    1002.4×
  131. 130PhichitPhichit, Thailand
    1002.4×
  132. 130Novo MestoUrban Municipality of Novo Mesto, Slovenia
    1002.4×
  133. 133BytówPomerania, Poland
    1002.3×
  134. 134PhetchabunPhetchabun, Thailand
    992.3×
  135. 134JenaThuringia, Germany
    992.3×
  136. 134HalberstadtSaxony-Anhalt, Germany
    992.3×
  137. 137MostaIl-Mosta, Malta
    992.3×
  138. 137SalernoCampania, Italy
    992.3×
  139. 139Nakhon SawanNakhon Sawan, Thailand
    982.3×
  140. 139GöttingenLower Saxony, Germany
    982.3×
  141. 141SaalfeldThuringia, Germany
    982.3×
  142. 142BydgoszczKujawsko-Pomorskie, Poland
    982.3×
  143. 143HaenamJeollanam-do, South Korea
    982.3×
  144. 143MühlhausenThuringia, Germany
    982.3×
  145. 145CelayaGuanajuato, Mexico
    982.3×
  146. 146NeuruppinBrandenburg, Germany
    972.3×
  147. 147Jeju CityJeju-do, South Korea
    972.3×
  148. 148Roi EtRoi Et, Thailand
    972.2×
  149. 148KaliszGreater Poland, Poland
    972.2×
  150. 148Ciudad Benito JuárezNuevo León, Mexico
    972.2×
  151. 151Sing BuriSing Buri, Thailand
    972.2×
  152. 151NeubrandenburgMecklenburg-Vorpommern, Germany
    972.2×
  153. 153ŻabbarĦaż-Żabbar, Malta
    962.2×
  154. 153WernigerodeSaxony-Anhalt, Germany
    962.2×
  155. 155WeißenfelsSaxony-Anhalt, Germany
    962.2×
  156. 155ElblągWarmia-Masuria, Poland
    962.2×
  157. 157AthensAttica, Greece
    962.2×
  158. 157PruszkówMazovia, Poland
    962.2×
  159. 157Nong Bua LamphuNong Bua Lamphu, Thailand
    962.2×
  160. 160Banja LukaSrpska, Bosnia and Herzegovina
    952.2×
  161. 161KasselHesse, Germany
    952.2×
  162. 161GoslarLower Saxony, Germany
    952.2×
  163. 161DelmenhorstLower Saxony, Germany
    952.2×
  164. 164GüstrowMecklenburg-Vorpommern, Germany
    952.2×
  165. 165JangheungJeollanam-do, South Korea
    952.2×
  166. 165TraunreutBavaria, Germany
    952.2×
  167. 167SokolovCarlsbad Region, Czechia
    942.2×
  168. 167KłodzkoLower Silesia, Poland
    942.2×
  169. 169ŁaskŁódź Voivodeship, Poland
    942.1×
  170. 169KołobrzegWest Pomerania, Poland
    942.1×
  171. 171ChaiyaphumChaiyaphum, Thailand
    932.1×
  172. 171SeogwipoJeju-do, South Korea
    932.1×
  173. 173Kędzierzyn-KoźleOpole Voivodeship, Poland
    932.1×
  174. 174WeimarThuringia, Germany
    932.1×
  175. 175RintelnLower Saxony, Germany
    932.1×
  176. 175ŻaryLubusz, Poland
    932.1×
  177. 177OytenLower Saxony, Germany
    922.1×
  178. 178OlsztynWarmia-Masuria, Poland
    922.1×
  179. 179Jastrzębie ZdrójSilesia, Poland
    922.1×
  180. 179SalamancaGuanajuato, Mexico
    922.1×
  181. 181OsornoLos Lagos Region, Chile
    922.1×
  182. 182MariborUrban Municipality of Maribor, Slovenia
    912.1×
  183. 183Şabāḩ as SālimMubārak al Kabīr, Kuwait
    912.0×
  184. 184MarktredwitzBavaria, Germany
    912.0×
  185. 184ErfurtThuringia, Germany
    912.0×
  186. 186GdańskPomerania, Poland
    912.0×
  187. 187PassauBavaria, Germany
    902.0×
  188. 187ToruńKujawsko-Pomorskie, Poland
    902.0×
  189. 187Puerto VarasLos Lagos Region, Chile
    902.0×
  190. 190PřerovOlomouc Region, Czechia
    902.0×
  191. 191YeongjuGyeongsangbuk-do, South Korea
    902.0×
  192. 191CeljeUrban Municipality of Celje, Slovenia
    902.0×
  193. 193Sakon NakhonSakon Nakhon, Thailand
    902.0×
  194. 194RacibórzSilesia, Poland
    902.0×
  195. 194AcerraCampania, Italy
    902.0×
  196. 196ŽilinaŽilina Region, Slovakia
    902.0×
  197. 197Hansestadt SalzwedelSaxony-Anhalt, Germany
    892.0×
  198. 197FriesoytheLower Saxony, Germany
    892.0×
  199. 197PłockMazovia, Poland
    892.0×
  200. 200Czechowice-DziedziceSilesia, Poland
    892.0×

Top 200 of 2,210 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 31, 2024, smogrank.com/history/2024-03-31 (accessed 3 Oct 2026).

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