SmogRank / History / March 22, 2023

Most polluted cities on March 22, 2023

1,441 cities ranked by their average PM2.5 over the day; the worst was Beijing, China, at 202.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during March 22, 2023. All episodes.

← Beijing 202.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for March 22, 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. 1BeijingBeijing, China
    27713.5×
  2. 2BamakoBamako, Mali
    1937.7×
  3. 3DelhiDelhi, India
    1786.3×
  4. 4Dhakalow-cost sensorsDhaka Division, Bangladesh
    1735.8×
  5. 5NanNan, Thailand
    1675.2×
  6. 6HanoiHanoi, Vietnam
    1624.7×
  7. 7ShenyangLiaoning, China
    1604.6×
  8. 8Lahorelow-cost sensorsPunjab, Pakistan
    1574.3×
  9. 9AlexandriaAlexandria, Egypt
    1574.3×
  10. 10Ban HouakhouaBokeo, Laos
    1574.3×
  11. 11Chiang MaiChiang Mai, Thailand
    1564.2×
  12. 12Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1533.9×
  13. 13Ubon RatchathaniUbon Ratchathani, Thailand
    1523.8×
  14. 14PhraePhrae, Thailand
    1503.7×
  15. 15CholulaPuebla, Mexico
    1493.7×
  16. 16PhayaoPhayao, Thailand
    1433.5×
  17. 17Bang Khun ThianBangkok, Thailand
    1423.5×
  18. 18LamphunLamphun, Thailand
    1403.4×
  19. 19PhetchabunPhetchabun, Thailand
    1363.3×
  20. 20UttaraditUttaradit, Thailand
    1343.3×
  21. 21TlaquepaqueJalisco, Mexico
    1343.3×
  22. 22Chiang RaiChiang Rai, Thailand
    1343.3×
  23. 23Udon ThaniUdon Thani, Thailand
    1313.2×
  24. 24MukdahanMukdahan, Thailand
    1303.2×
  25. 25SukhothaiSukhothai, Thailand
    1303.1×
  26. 26NišCentral Serbia, Serbia
    1263.0×
  27. 27ChisinauChișinău Municipality, Moldova
    1263.0×
  28. 27PakxanBolikhamsai, Laos
    1263.0×
  29. 29Nong Bua LamphuNong Bua Lamphu, Thailand
    1243.0×
  30. 30Mae SotTak, Thailand
    1212.9×
  31. 31KalasinKalasin, Thailand
    1192.9×
  32. 32Almatylow-cost sensorsAlmaty, Kazakhstan
    1172.8×
  33. 33PhichitPhichit, Thailand
    1162.8×
  34. 34ChaiyaphumChaiyaphum, Thailand
    1152.7×
  35. 35LampangLampang, Thailand
    1142.7×
  36. 36Nakhon RatchasimaNakhon Ratchasima, Thailand
    1142.7×
  37. 37Puerto VarasLos Lagos Region, Chile
    1132.7×
  38. 38Islamabadlow-cost sensorsIslamabad, Pakistan
    1122.7×
  39. 38Roi EtRoi Et, Thailand
    1122.7×
  40. 40Sakon NakhonSakon Nakhon, Thailand
    1112.6×
  41. 41Ciudad JuárezChihuahua, Mexico
    1102.6×
  42. 42Abujalow-cost sensorsFCT, Nigeria
    1102.6×
  43. 43BaghdadBaghdad, Iraq
    1092.6×
  44. 44Lop BuriLopburi, Thailand
    1082.6×
  45. 45KhartoumKhartoum, Sudan
    1082.6×
  46. 46Santa CatarinaNuevo León, Mexico
    1072.5×
  47. 47Jastrzębie ZdrójSilesia, Poland
    1062.5×
  48. 48Kamphaeng PhetKamphaeng Phet, Thailand
    1052.5×
  49. 49KutnoŁódź Voivodeship, Poland
    1052.5×
  50. 50CelayaGuanajuato, Mexico
    1042.5×
  51. 51YangonYangon, Myanmar
    1032.4×
  52. 51WłocławekKujawsko-Pomorskie, Poland
    1032.4×
  53. 53Samut SakhonSamut Sakhon, Thailand
    1022.4×
  54. 54VereenigingGauteng, South Africa
    1022.4×
  55. 54Si Sa KetSi Sa Ket, Thailand
    1022.4×
  56. 56Nakhon SawanNakhon Sawan, Thailand
    1012.4×
  57. 56RacibórzSilesia, Poland
    1012.4×
  58. 58Sing BuriSing Buri, Thailand
    1002.4×
  59. 59Si Maha PhotPrachin Buri, Thailand
    992.3×
  60. 59TrussvilleAlabama, United States
    992.3×
  61. 61La UniónLos Ríos Region, Chile
    992.3×
  62. 62KanchanaburiKanchanaburi, Thailand
    992.3×
  63. 63RatchaburiRatchaburi, Thailand
    982.3×
  64. 64CoyhaiqueAysén, Chile
    982.3×
  65. 65ChillánÑuble, Chile
    972.3×
  66. 66IaşiIași County, Romania
    972.3×
  67. 67San CarlosÑuble, Chile
    972.2×
  68. 68SalorTashkent Region, Uzbekistan
    962.2×
  69. 68PłockMazovia, Poland
    962.2×
  70. 70ShanghaiShanghai, China
    962.2×
  71. 71GarcíaNuevo León, Mexico
    962.2×
  72. 72San Mateo AtencoMéxico, Mexico
    952.2×
  73. 73Buri RamBuriram, Thailand
    952.2×
  74. 74LublinLublin, Poland
    952.2×
  75. 74San Francisco TlalcilalcalpanMéxico, Mexico
    952.2×
  76. 76Bang NaBangkok, Thailand
    942.2×
  77. 76Lak SiBangkok, Thailand
    942.2×
  78. 78ŁaskŁódź Voivodeship, Poland
    942.2×
  79. 79TakTak, Thailand
    942.1×
  80. 80XonacatlánMéxico, Mexico
    942.1×
  81. 80ZapopanJalisco, Mexico
    942.1×
  82. 80AguascalientesAguascalientes, Mexico
    942.1×
  83. 83KrakówLesser Poland, Poland
    932.1×
  84. 84Haskovolow-cost sensorsHaskovo, Bulgaria
    932.1×
  85. 85SaraburiSaraburi, Thailand
    932.1×
  86. 86JohannesburgGauteng, South Africa
    922.1×
  87. 87Khlong Sam WaBangkok, Thailand
    922.1×
  88. 88BohumínMoravian-Silesian Region, Czechia
    912.0×
  89. 89Suphan BuriSuphan Buri, Thailand
    912.0×
  90. 90BelgradeCentral Serbia, Serbia
    912.0×
  91. 91ŁódźŁódź Voivodeship, Poland
    902.0×
  92. 91TrentoTrentino-Alto Adige, Italy
    902.0×
  93. 91TolucaMéxico, Mexico
    902.0×
  94. 94Gómez PalacioDurango, Mexico
    902.0×
  95. 95Los ÁngelesBiobio, Chile
    902.0×
  96. 96ToruńKujawsko-Pomorskie, Poland
    902.0×
  97. 96AthensGeorgia, United States
    902.0×
  98. 98TrenčínTrenčín Region, Slovakia
    892.0×
  99. 99KościanGreater Poland, Poland
    892.0×
  100. 99GadsdenAlabama, United States
    892.0×
  101. 101GuangzhouGuangdong, China
    892.0×
  102. 101RancaguaO'Higgins Region, Chile
    892.0×
  103. 103WawerMazovia, Poland
    892.0×
  104. 104HuntsvilleAlabama, United States
    881.9×
  105. 105LawrencevilleGeorgia, United States
    881.9×
  106. 106AthensAttica, Greece
    881.9×
  107. 106Naucalpan de JuárezMéxico, Mexico
    881.9×
  108. 108TalcaMaule Region, Chile
    881.9×
  109. 108Ciudad Benito JuárezNuevo León, Mexico
    881.9×
  110. 110SiedlceMazovia, Poland
    871.9×
  111. 111PułtuskMazovia, Poland
    871.9×
  112. 111Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    871.9×
  113. 113N'DjamenaN’Djaména, Chad
    871.9×
  114. 114ZnojmoSouth Moravian, Czechia
    871.9×
  115. 114ClemmonsNorth Carolina, United States
    871.9×
  116. 116NiskoSubcarpathia, Poland
    861.9×
  117. 117Ga-RankuwaNorth West, South Africa
    861.9×
  118. 118Nong KhaemBangkok, Thailand
    861.9×
  119. 118KatowiceSilesia, Poland
    861.9×
  120. 120San Salvador TizatlalliMéxico, Mexico
    861.9×
  121. 121Bang KapiBangkok, Thailand
    851.8×
  122. 121SantiagoSantiago Metropolitan, Chile
    851.8×
  123. 121Ciudad ApodacaNuevo León, Mexico
    851.8×
  124. 124RengoO'Higgins Region, Chile
    851.8×
  125. 124BirminghamAlabama, United States
    851.8×
  126. 124East RidgeTennessee, United States
    851.8×
  127. 127Sai MaiBangkok, Thailand
    841.8×
  128. 128AlessandriaPiedmont, Italy
    841.8×
  129. 129Ciudad NezahualcoyotlMéxico, Mexico
    831.8×
  130. 129GreenvilleSouth Carolina, United States
    831.8×
  131. 131OtwockMazovia, Poland
    831.7×
  132. 131TalaganteSantiago Metropolitan, Chile
    831.7×
  133. 131LinaresMaule Region, Chile
    831.7×
  134. 131CauquenesMaule Region, Chile
    831.7×
  135. 131GainesvilleGeorgia, United States
    831.7×
  136. 131Khan Na YaoBangkok, Thailand
    831.7×
  137. 131Saphan SungBangkok, Thailand
    831.7×
  138. 138Puente AltoSantiago Metropolitan, Chile
    821.7×
  139. 139OlsztynWarmia-Masuria, Poland
    821.7×
  140. 139RoveretoTrentino-Alto Adige, Italy
    821.7×
  141. 139NaplesCampania, Italy
    821.7×
  142. 139IndianapolisIndiana, United States
    821.7×
  143. 143WarsawMazovia, Poland
    821.7×
  144. 143Winston-SalemNorth Carolina, United States
    821.7×
  145. 145ŚwiecieKujawsko-Pomorskie, Poland
    821.7×
  146. 146Nong ChokBangkok, Thailand
    821.7×
  147. 146Ban Samae DamBangkok, Thailand
    821.7×
  148. 146LuganoTicino, Switzerland
    821.7×
  149. 146Banja LukaSrpska, Bosnia and Herzegovina
    821.7×
  150. 150CuricóMaule Region, Chile
    811.7×
  151. 151BellinzonaTicino, Switzerland
    811.7×
  152. 152ŻyrardówMazovia, Poland
    811.7×
  153. 152ValenciaValencia, Spain
    811.7×
  154. 152ŽilinaŽilina Region, Slovakia
    811.7×
  155. 152ChattanoogaTennessee, United States
    811.7×
  156. 156ZgierzŁódź Voivodeship, Poland
    811.7×
  157. 156MonterreyNuevo León, Mexico
    811.7×
  158. 158ToméBiobio, Chile
    811.7×
  159. 159Khlong LuangPathum Thani, Thailand
    801.7×
  160. 159Tepeji del Río de OcampoHidalgo, Mexico
    801.7×
  161. 161MumbaiMaharashtra, India
    801.7×
  162. 161JesiThe Marches, Italy
    801.7×
  163. 163RzeszówSubcarpathia, Poland
    801.6×
  164. 163Nakhon PathomNakhon Pathom, Thailand
    801.6×
  165. 163Bueng KumBangkok, Thailand
    801.6×
  166. 166ŁukówLublin, Poland
    801.6×
  167. 166BangkokBangkok, Thailand
    801.6×
  168. 166AranyaprathetSa Kaeo, Thailand
    801.6×
  169. 166SenicaTrnava Region, Slovakia
    801.6×
  170. 166NacimientoBiobio, Chile
    801.6×
  171. 171Mueang NonthaburiNonthaburi, Thailand
    801.6×
  172. 171Kędzierzyn-KoźleOpole Voivodeship, Poland
    801.6×
  173. 173BeneventoCampania, Italy
    791.6×
  174. 174Ban ChangRayong, Thailand
    791.6×
  175. 174ConakryConakry, Guinea
    791.6×
  176. 174Český TěšínMoravian-Silesian Region, Czechia
    791.6×
  177. 174Falconara MarittimaThe Marches, Italy
    791.6×
  178. 174Viña del MarValparaiso, Chile
    791.6×
  179. 174San Luis PotosíSan Luis Potosí, Mexico
    791.6×
  180. 180KętrzynWarmia-Masuria, Poland
    791.6×
  181. 180QuillotaValparaiso, Chile
    791.6×
  182. 182Botevgradlow-cost sensorsSofia, Bulgaria
    781.6×
  183. 182GuadalajaraJalisco, Mexico
    781.6×
  184. 184AricaArica y Parinacota Region, Chile
    781.6×
  185. 184Lat KrabangBangkok, Thailand
    781.6×
  186. 186MartinŽilina Region, Slovakia
    781.6×
  187. 187PristinaPristina, Kosovo
    771.6×
  188. 188BolzanoTrentino-Alto Adige, Italy
    771.5×
  189. 189KłodzkoLower Silesia, Poland
    771.5×
  190. 189DecaturAlabama, United States
    771.5×
  191. 191SalamancaGuanajuato, Mexico
    771.5×
  192. 192NashvilleTennessee, United States
    771.5×
  193. 193HualquiBiobio, Chile
    771.5×
  194. 194Cluj-NapocaCluj County, Romania
    761.5×
  195. 194QuinteroValparaiso, Chile
    761.5×
  196. 196ZamośćLublin, Poland
    761.5×
  197. 197TarnówLesser Poland, Poland
    761.5×
  198. 197TokozaGauteng, South Africa
    761.5×
  199. 197Ban Khlong PrawetBangkok, Thailand
    761.5×
  200. 197ReykjavíkCapital Region, Iceland
    761.5×

Top 200 of 1,441 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 22, 2023, smogrank.com/history/2023-03-22 (accessed 2 Oct 2026).

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