SmogRank / History / March 20, 2024

Most polluted cities on March 20, 2024

748 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 220.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during March 20, 2024. All episodes.

← N'Djamena 220.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for March 20, 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
    29514.7×
  2. 2Dhakalow-cost sensorsDhaka Division, Bangladesh
    2018.4×
  3. 3DelhiDelhi, India
    1947.8×
  4. 4Mae SaiChiang Rai, Thailand
    1897.3×
  5. 5Kathmandulow-cost sensorsBagmati Province, Nepal
    1897.3×
  6. 6Lahorelow-cost sensorsPunjab, Pakistan
    1836.7×
  7. 7Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1715.6×
  8. 8Chiang MaiChiang Mai, Thailand
    1685.3×
  9. 9LamphunLamphun, Thailand
    1624.7×
  10. 10Chiang RaiChiang Rai, Thailand
    1614.6×
  11. 11ŁaskŁódź Voivodeship, Poland
    1584.4×
  12. 12LampangLampang, Thailand
    1574.2×
  13. 13PhayaoPhayao, Thailand
    1544.0×
  14. 14CairoCairo, Egypt
    1543.9×
  15. 15NanNan, Thailand
    1493.7×
  16. 15KościanGreater Poland, Poland
    1493.7×
  17. 17KutnoŁódź Voivodeship, Poland
    1483.6×
  18. 18YangonYangon, Myanmar
    1403.4×
  19. 19ZgierzŁódź Voivodeship, Poland
    1393.4×
  20. 20WłocławekKujawsko-Pomorskie, Poland
    1393.4×
  21. 21RadomskoŁódź Voivodeship, Poland
    1383.4×
  22. 22RacibórzSilesia, Poland
    1353.3×
  23. 23Czechowice-DziedziceSilesia, Poland
    1333.2×
  24. 24HyderabadTelangana, India
    1323.2×
  25. 25DziałdowoWarmia-Masuria, Poland
    1303.2×
  26. 25DębicaSubcarpathia, Poland
    1303.2×
  27. 27Bielsko-BialaSilesia, Poland
    1303.2×
  28. 28MumbaiMaharashtra, India
    1293.1×
  29. 28PhraePhrae, Thailand
    1293.1×
  30. 30KłodzkoLower Silesia, Poland
    1293.1×
  31. 31ŻyrardówMazovia, Poland
    1283.1×
  32. 32KaliszGreater Poland, Poland
    1263.0×
  33. 33ŻywiecSilesia, Poland
    1253.0×
  34. 34Jastrzębie ZdrójSilesia, Poland
    1253.0×
  35. 35GrajewoPodlasie, Poland
    1243.0×
  36. 36HanoiHanoi, Vietnam
    1243.0×
  37. 36KatowiceSilesia, Poland
    1243.0×
  38. 38PoznańGreater Poland, Poland
    1243.0×
  39. 39Karachilow-cost sensorsSindh, Pakistan
    1222.9×
  40. 40ZemunCentral Serbia, Serbia
    1212.9×
  41. 41SiedlceMazovia, Poland
    1192.9×
  42. 42KalasinKalasin, Thailand
    1172.8×
  43. 43Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    1172.8×
  44. 44PančevoVojvodina, Serbia
    1172.8×
  45. 45ZamośćLublin, Poland
    1152.7×
  46. 45OpoleOpole Voivodeship, Poland
    1152.7×
  47. 47Islamabadlow-cost sensorsIslamabad, Pakistan
    1142.7×
  48. 48Mae SotTak, Thailand
    1142.7×
  49. 48SurinSurin, Thailand
    1142.7×
  50. 50AstanaAstana, Kazakhstan
    1142.7×
  51. 50Suphan BuriSuphan Buri, Thailand
    1142.7×
  52. 52KanchanaburiKanchanaburi, Thailand
    1132.7×
  53. 53YasothonYasothon, Thailand
    1122.7×
  54. 53BydgoszczKujawsko-Pomorskie, Poland
    1122.7×
  55. 55AshgabatAshgabat, Turkmenistan
    1112.6×
  56. 56KrakówLesser Poland, Poland
    1092.6×
  57. 57LublinLublin, Poland
    1092.6×
  58. 58UttaraditUttaradit, Thailand
    1082.6×
  59. 59Ubon RatchathaniUbon Ratchathani, Thailand
    1082.5×
  60. 59Kędzierzyn-KoźleOpole Voivodeship, Poland
    1082.5×
  61. 61LęborkPomerania, Poland
    1062.5×
  62. 62ChennaiTamil Nadu, India
    1052.5×
  63. 63WrocławLower Silesia, Poland
    1042.5×
  64. 64SukhothaiSukhothai, Thailand
    1032.4×
  65. 65ColomboWestern Province, Sri Lanka
    1032.4×
  66. 65Khan Na YaoBangkok, Thailand
    1032.4×
  67. 67ŁódźŁódź Voivodeship, Poland
    1022.4×
  68. 68Si Sa KetSi Sa Ket, Thailand
    1022.4×
  69. 68Nakhon RatchasimaNakhon Ratchasima, Thailand
    1022.4×
  70. 70Ulan BatorUlaanbaatar, Mongolia
    1002.3×
  71. 71Khlong LuangPathum Thani, Thailand
    992.3×
  72. 71Chai NatChai Nat, Thailand
    992.3×
  73. 73BelgradeCentral Serbia, Serbia
    992.3×
  74. 74AranyaprathetSa Kaeo, Thailand
    982.3×
  75. 75Skarżysko-KamiennaŚwiętokrzyskie, Poland
    982.3×
  76. 75Roi EtRoi Et, Thailand
    982.3×
  77. 77NiskoSubcarpathia, Poland
    972.2×
  78. 77Almatylow-cost sensorsAlmaty, Kazakhstan
    972.2×
  79. 79Lat KrabangBangkok, Thailand
    972.2×
  80. 80KielceŚwiętokrzyskie, Poland
    962.2×
  81. 81Kampalalow-cost sensorsCentral Region, Uganda
    962.2×
  82. 82LazarevacCentral Serbia, Serbia
    962.2×
  83. 83MukdahanMukdahan, Thailand
    962.2×
  84. 83Strzelce OpolskieOpole Voivodeship, Poland
    962.2×
  85. 85Lop BuriLopburi, Thailand
    952.2×
  86. 86ŁukówLublin, Poland
    952.2×
  87. 86Bueng KumBangkok, Thailand
    952.2×
  88. 88PhetchabunPhetchabun, Thailand
    952.2×
  89. 89LegionowoMazovia, Poland
    942.2×
  90. 90Sai MaiBangkok, Thailand
    942.2×
  91. 90Saphan SungBangkok, Thailand
    942.2×
  92. 92Banja LukaSrpska, Bosnia and Herzegovina
    942.1×
  93. 93GdyniaPomerania, Poland
    942.1×
  94. 94ŚwiecieKujawsko-Pomorskie, Poland
    932.1×
  95. 95TratTrat, Thailand
    922.1×
  96. 95Phra PradaengSamut Prakan, Thailand
    922.1×
  97. 95BangkokBangkok, Thailand
    922.1×
  98. 98SzczecinWest Pomerania, Poland
    922.1×
  99. 99ToruńKujawsko-Pomorskie, Poland
    922.1×
  100. 100Nong KhaemBangkok, Thailand
    912.1×
  101. 101Sing BuriSing Buri, Thailand
    912.0×
  102. 101Jelenia GóraLower Silesia, Poland
    912.0×
  103. 103OtwockMazovia, Poland
    912.0×
  104. 103Buri RamBuriram, Thailand
    912.0×
  105. 105SarajevoFederation of B&H, Bosnia and Herzegovina
    912.0×
  106. 106Amnat CharoenAmnat Charoen, Thailand
    912.0×
  107. 106ShanghaiShanghai, China
    912.0×
  108. 108PhichitPhichit, Thailand
    902.0×
  109. 109Gorzów WielkopolskiLubusz, Poland
    902.0×
  110. 110Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    902.0×
  111. 111Ban Khlong PrawetBangkok, Thailand
    902.0×
  112. 112KigaliKigali, Rwanda
    892.0×
  113. 113EłkWarmia-Masuria, Poland
    892.0×
  114. 114Bang Bo DistrictSamut Prakan, Thailand
    881.9×
  115. 115Zielona GóraLubusz, Poland
    881.9×
  116. 116Khon KaenKhon Kaen, Thailand
    881.9×
  117. 117SremčicaCentral Serbia, Serbia
    881.9×
  118. 117KościerzynaPomerania, Poland
    881.9×
  119. 119Nakhon PathomNakhon Pathom, Thailand
    871.9×
  120. 120Prachin BuriPrachin Buri, Thailand
    871.9×
  121. 120LoeiLoei, Thailand
    871.9×
  122. 122PruszkówMazovia, Poland
    871.9×
  123. 122GuangzhouGuangdong, China
    871.9×
  124. 124MielecSubcarpathia, Poland
    861.9×
  125. 124Mueang NonthaburiNonthaburi, Thailand
    861.9×
  126. 126JarosławSubcarpathia, Poland
    861.9×
  127. 127ChanthaburiChanthaburi, Thailand
    861.9×
  128. 127ZhushanTaiwan, Taiwan
    861.9×
  129. 129ErlinTaiwan, Taiwan
    861.8×
  130. 130TarnówLesser Poland, Poland
    851.8×
  131. 130RadomMazovia, Poland
    851.8×
  132. 130Samut SakhonSamut Sakhon, Thailand
    851.8×
  133. 130GdańskPomerania, Poland
    851.8×
  134. 134PrzemyślSubcarpathia, Poland
    851.8×
  135. 135Samut PrakanSamut Prakan, Thailand
    851.8×
  136. 136ChaiyaphumChaiyaphum, Thailand
    851.8×
  137. 136Bang KapiBangkok, Thailand
    851.8×
  138. 138PłockMazovia, Poland
    851.8×
  139. 139StarachowiceŚwiętokrzyskie, Poland
    841.8×
  140. 139BiałystokPodlasie, Poland
    841.8×
  141. 139Chiayi CityTaiwan, Taiwan
    841.8×
  142. 139ShenyangLiaoning, China
    841.8×
  143. 143Laem ChabangChon Buri, Thailand
    841.8×
  144. 144TaibaoTaiwan, Taiwan
    831.8×
  145. 145RzeszówSubcarpathia, Poland
    831.8×
  146. 145PhetchaburiPhetchaburi, Thailand
    831.8×
  147. 145ErlunTaiwan, Taiwan
    831.8×
  148. 148BeigangTaiwan, Taiwan
    831.7×
  149. 149Nakhon SawanNakhon Sawan, Thailand
    821.7×
  150. 149Nakhon NayokNakhon Nayok, Thailand
    821.7×
  151. 151ShulinTaipei, Taiwan
    821.7×
  152. 151Accralow-cost sensorsGreater Accra, Ghana
    821.7×
  153. 153JinchengFukien, Taiwan
    821.7×
  154. 154Konstancin-JeziornaMazovia, Poland
    821.7×
  155. 155ObrenovacCentral Serbia, Serbia
    811.7×
  156. 156DouliuTaiwan, Taiwan
    811.7×
  157. 157Ban ChangRayong, Thailand
    801.7×
  158. 157BytówPomerania, Poland
    801.7×
  159. 159HsinchuTaiwan, Taiwan
    801.6×
  160. 160YongkangTaiwan, Taiwan
    801.6×
  161. 161AlgiersAlgiers, Algeria
    791.6×
  162. 162TainanTaiwan, Taiwan
    791.6×
  163. 163Hualien CityTaiwan, Taiwan
    771.5×
  164. 164RayongRayong, Thailand
    761.5×
  165. 165Udon ThaniUdon Thani, Thailand
    761.5×
  166. 165XinyingTaiwan, Taiwan
    761.5×
  167. 165NeiliTaiwan, Taiwan
    761.5×
  168. 168PhuketPhuket, Thailand
    761.5×
  169. 169YuanlinTaiwan, Taiwan
    761.5×
  170. 169ToufenTaiwan, Taiwan
    761.5×
  171. 171TaichungTaiwan, Taiwan
    761.5×
  172. 172BuziTaiwan, Taiwan
    751.5×
  173. 173ElblągWarmia-Masuria, Poland
    751.5×
  174. 173New Taipei CityTaipei, Taiwan
    751.5×
  175. 175BaghdadBaghdad, Iraq
    751.5×
  176. 176SanzhiTaipei, Taiwan
    751.5×
  177. 177Hua HinPrachuap Khiri Khan, Thailand
    741.4×
  178. 177TaipeiTaiwan, Taiwan
    741.4×
  179. 177XizhiTaipei, Taiwan
    741.4×
  180. 177ZhubeiTaiwan, Taiwan
    741.4×
  181. 181OlsztynWarmia-Masuria, Poland
    741.4×
  182. 182SuwałkiPodlasie, Poland
    741.4×
  183. 182KeelungTaiwan, Taiwan
    741.4×
  184. 184CelayaGuanajuato, Mexico
    731.4×
  185. 185NantouTaiwan, Taiwan
    731.4×
  186. 185MagongTaiwan, Taiwan
    731.4×
  187. 187ZhudongTaiwan, Taiwan
    731.4×
  188. 188DaxiTaiwan, Taiwan
    731.4×
  189. 189WarsawMazovia, Poland
    731.4×
  190. 189ChanghuaTaiwan, Taiwan
    731.4×
  191. 191FengshanTakao, Taiwan
    721.4×
  192. 192NarathiwatNarathiwat, Thailand
    721.4×
  193. 192MiaoliTaiwan, Taiwan
    721.4×
  194. 194Surat ThaniSurat Thani, Thailand
    721.4×
  195. 194YalaYala, Thailand
    721.4×
  196. 196AugustówPodlasie, Poland
    721.3×
  197. 197ŻaryLubusz, Poland
    711.3×
  198. 198WawerMazovia, Poland
    711.3×
  199. 199YilanTaiwan, Taiwan
    711.3×
  200. 199HengchunTaiwan, Taiwan
    711.3×

Top 200 of 748 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 20, 2024, smogrank.com/history/2024-03-20 (accessed 3 Oct 2026).

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