SmogRank / History / February 21, 2024

Most polluted cities on February 21, 2024

2,217 cities ranked by their average PM2.5 over the day; the worst was Tlaquepaque, Mexico, at 113.0 µg/m³. Each city's own local calendar day.

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

← Tlaquepaque 113.0 µg/m³ 100 µg/m³15 WHO 24-hour guideline
Every city ranked for February 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. 1TlaquepaqueJalisco, Mexico
    1917.5×
  2. 2HyderabadTelangana, India
    1897.3×
  3. 3Ulan BatorUlaanbaatar, Mongolia
    1877.1×
  4. 4N'DjamenaN’Djaména, Chad
    1867.0×
  5. 5SalorTashkent Region, Uzbekistan
    1836.7×
  6. 6DelhiDelhi, India
    1786.3×
  7. 7Dhakalow-cost sensorsDhaka Division, Bangladesh
    1776.2×
  8. 8Kathmandulow-cost sensorsBagmati Province, Nepal
    1776.1×
  9. 9Almatylow-cost sensorsAlmaty, Kazakhstan
    1685.4×
  10. 10Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1665.1×
  11. 11KolkataWest Bengal, India
    1624.8×
  12. 12DushanbeDushanbe, Tajikistan
    1614.7×
  13. 13NišCentral Serbia, Serbia
    1574.3×
  14. 14Ubon RatchathaniUbon Ratchathani, Thailand
    1564.2×
  15. 15Novi PazarCentral Serbia, Serbia
    1544.0×
  16. 15PinetownKwaZulu-Natal, South Africa
    1544.0×
  17. 17KigaliKigali, Rwanda
    1523.8×
  18. 18Abujalow-cost sensorsFCT, Nigeria
    1523.8×
  19. 19VigevanoLombardy, Italy
    1503.7×
  20. 20MukdahanMukdahan, Thailand
    1483.6×
  21. 21PljevljaPljevlja, Montenegro
    1483.6×
  22. 22KraljevoCentral Serbia, Serbia
    1463.6×
  23. 23SukhothaiSukhothai, Thailand
    1443.5×
  24. 24YangonYangon, Myanmar
    1403.4×
  25. 25VimercateLombardy, Italy
    1383.4×
  26. 26LampangLampang, Thailand
    1363.3×
  27. 26Ciudad Benito JuárezNuevo León, Mexico
    1363.3×
  28. 28PirotCentral Serbia, Serbia
    1353.3×
  29. 29Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    1353.3×
  30. 30StrumicaStrumica, North Macedonia
    1343.3×
  31. 31NanNan, Thailand
    1343.3×
  32. 32YasothonYasothon, Thailand
    1343.3×
  33. 33Amnat CharoenAmnat Charoen, Thailand
    1333.2×
  34. 34NovaraPiedmont, Italy
    1333.2×
  35. 35PaviaLombardy, Italy
    1273.1×
  36. 36TolucaMéxico, Mexico
    1253.0×
  37. 37ChennaiTamil Nadu, India
    1243.0×
  38. 38ValjevoCentral Serbia, Serbia
    1222.9×
  39. 39BitolaBitola, North Macedonia
    1212.9×
  40. 40Mae SaiChiang Rai, Thailand
    1212.9×
  41. 41Puerto MonttLos Lagos Region, Chile
    1172.8×
  42. 42KalasinKalasin, Thailand
    1172.8×
  43. 43GostivarGostivar, North Macedonia
    1172.8×
  44. 44AlessandriaPiedmont, Italy
    1152.7×
  45. 45KavadarciKavadarci, North Macedonia
    1142.7×
  46. 46HanoiHanoi, Vietnam
    1142.7×
  47. 47DejCluj County, Romania
    1122.7×
  48. 48TurinPiedmont, Italy
    1122.7×
  49. 49BirminghamAlabama, United States
    1112.6×
  50. 50KragujevacCentral Serbia, Serbia
    1112.6×
  51. 51Si Sa KetSi Sa Ket, Thailand
    1102.6×
  52. 52LamphunLamphun, Thailand
    1092.6×
  53. 53ČačakCentral Serbia, Serbia
    1092.6×
  54. 54CairoCairo, Egypt
    1082.6×
  55. 55Kansas CityKansas, United States
    1082.6×
  56. 56SarajevoFederation of B&H, Bosnia and Herzegovina
    1082.5×
  57. 57PhayaoPhayao, Thailand
    1072.5×
  58. 57CapannoriTuscany, Italy
    1072.5×
  59. 59LodiLombardy, Italy
    1062.5×
  60. 60AlbanyGeorgia, United States
    1052.5×
  61. 61ZemunCentral Serbia, Serbia
    1042.5×
  62. 61Islamabadlow-cost sensorsIslamabad, Pakistan
    1042.5×
  63. 63TetovoTetovo, North Macedonia
    1042.4×
  64. 64ColumbusGeorgia, United States
    1032.4×
  65. 65PhraePhrae, Thailand
    1022.4×
  66. 66Roi EtRoi Et, Thailand
    1022.4×
  67. 67Udon ThaniUdon Thani, Thailand
    1012.4×
  68. 68Nong Bua LamphuNong Bua Lamphu, Thailand
    1002.4×
  69. 69Banja LukaSrpska, Bosnia and Herzegovina
    992.3×
  70. 70BorgomaneroPiedmont, Italy
    992.3×
  71. 71LazarevacCentral Serbia, Serbia
    992.3×
  72. 72TrussvilleAlabama, United States
    982.3×
  73. 73UttaraditUttaradit, Thailand
    982.3×
  74. 74ĆuprijaCentral Serbia, Serbia
    982.3×
  75. 75Kampalalow-cost sensorsCentral Region, Uganda
    972.3×
  76. 76MantuaLombardy, Italy
    972.3×
  77. 77SurinSurin, Thailand
    972.2×
  78. 78PhetchabunPhetchabun, Thailand
    952.2×
  79. 79UžiceCentral Serbia, Serbia
    942.1×
  80. 80SremčicaCentral Serbia, Serbia
    932.1×
  81. 81GadsdenAlabama, United States
    932.1×
  82. 82MumbaiMaharashtra, India
    922.1×
  83. 82MaconGeorgia, United States
    922.1×
  84. 84ChaiyaphumChaiyaphum, Thailand
    922.1×
  85. 84Phenix CityAlabama, United States
    922.1×
  86. 86VelesVeles, North Macedonia
    912.0×
  87. 87SmederevoCentral Serbia, Serbia
    902.0×
  88. 88FlorenceSouth Carolina, United States
    902.0×
  89. 89PátraWest Greece, Greece
    902.0×
  90. 90RuseRuse, Bulgaria
    902.0×
  91. 91IaşiIași County, Romania
    902.0×
  92. 92HuntsvilleAlabama, United States
    892.0×
  93. 92PeoriaIllinois, United States
    892.0×
  94. 94SalamancaGuanajuato, Mexico
    881.9×
  95. 95DziałdowoWarmia-Masuria, Poland
    881.9×
  96. 96BelgradeCentral Serbia, Serbia
    881.9×
  97. 97PančevoVojvodina, Serbia
    871.9×
  98. 98SaskatoonSaskatchewan, Canada
    871.9×
  99. 99ZgierzŁódź Voivodeship, Poland
    871.9×
  100. 99Medicine HatAlberta, Canada
    871.9×
  101. 101BraPiedmont, Italy
    871.9×
  102. 102MiddelburgMpumalanga, South Africa
    861.9×
  103. 103BloemfonteinFree State, South Africa
    861.9×
  104. 103Lop BuriLopburi, Thailand
    861.9×
  105. 103HueytownAlabama, United States
    861.9×
  106. 106SkopjeGrad Skopje, North Macedonia
    861.9×
  107. 107Puerto VarasLos Lagos Region, Chile
    861.9×
  108. 108Nakhon RatchasimaNakhon Ratchasima, Thailand
    851.8×
  109. 109ObrenovacCentral Serbia, Serbia
    851.8×
  110. 110ComoLombardy, Italy
    851.8×
  111. 111Cluj-NapocaCluj County, Romania
    851.8×
  112. 112OurenseGalicia, Spain
    841.8×
  113. 113East RidgeTennessee, United States
    841.8×
  114. 114OpoleOpole Voivodeship, Poland
    841.8×
  115. 115Si Maha PhotPrachin Buri, Thailand
    841.8×
  116. 116CraiovaDolj, Romania
    831.8×
  117. 117MiskolcBorsod-Abaúj-Zemplén, Hungary
    831.8×
  118. 118GainesvilleGeorgia, United States
    831.8×
  119. 119Granite CityIllinois, United States
    831.7×
  120. 120Karachilow-cost sensorsSindh, Pakistan
    831.7×
  121. 121Molina de SeguraMurcia, Spain
    821.7×
  122. 122Forest ParkGeorgia, United States
    821.7×
  123. 123KrielMpumalanga, South Africa
    811.7×
  124. 124PhichitPhichit, Thailand
    811.7×
  125. 125KochaniKochani, North Macedonia
    811.7×
  126. 125BeneventoCampania, Italy
    811.7×
  127. 125AthensGeorgia, United States
    811.7×
  128. 128MurciaMurcia, Spain
    811.7×
  129. 128Warner RobinsGeorgia, United States
    811.7×
  130. 130LleidaCatalonia, Spain
    801.7×
  131. 131Skarżysko-KamiennaŚwiętokrzyskie, Poland
    801.6×
  132. 131Grand RapidsMichigan, United States
    801.6×
  133. 133KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    801.6×
  134. 133Chai NatChai Nat, Thailand
    801.6×
  135. 135SecundaMpumalanga, South Africa
    801.6×
  136. 135TratTrat, Thailand
    801.6×
  137. 135WłocławekKujawsko-Pomorskie, Poland
    801.6×
  138. 135HamarInnlandet, Norway
    801.6×
  139. 135DecaturAlabama, United States
    801.6×
  140. 135JacksonMississippi, United States
    801.6×
  141. 135DearbornMichigan, United States
    801.6×
  142. 142Şabāḩ as SālimMubārak al Kabīr, Kuwait
    791.6×
  143. 142StandertonMpumalanga, South Africa
    791.6×
  144. 144Sevlievolow-cost sensorsGabrovo, Bulgaria
    791.6×
  145. 144Barrio de PeralMurcia, Spain
    791.6×
  146. 146Ceglie MessapicaApulia, Italy
    791.6×
  147. 147KutnoŁódź Voivodeship, Poland
    791.6×
  148. 148MarikanaNorth West, South Africa
    781.6×
  149. 149Buri RamBuriram, Thailand
    781.6×
  150. 150Haskovolow-cost sensorsHaskovo, Bulgaria
    781.6×
  151. 150Mollet del VallèsCatalonia, Spain
    781.6×
  152. 150BrookfieldIllinois, United States
    781.6×
  153. 153BucharestBucharest, Romania
    771.6×
  154. 154ErbaLombardy, Italy
    771.5×
  155. 155PhuketPhuket, Thailand
    771.5×
  156. 156OlatheKansas, United States
    771.5×
  157. 156MinneapolisMinnesota, United States
    771.5×
  158. 158Chiang MaiChiang Mai, Thailand
    761.5×
  159. 158JesiThe Marches, Italy
    761.5×
  160. 160AsprópyrgosAttica, Greece
    761.5×
  161. 160Chiang RaiChiang Rai, Thailand
    761.5×
  162. 160ManlleuCatalonia, Spain
    761.5×
  163. 160JolietIllinois, United States
    761.5×
  164. 164AntananarivoAnalamanga, Madagascar
    761.5×
  165. 164East Saint LouisIllinois, United States
    761.5×
  166. 166Sing BuriSing Buri, Thailand
    761.5×
  167. 166Bang NaBangkok, Thailand
    761.5×
  168. 166RedfordMichigan, United States
    761.5×
  169. 169Franklin ParkIllinois, United States
    751.5×
  170. 170ShenyangLiaoning, China
    751.5×
  171. 170East ChicagoIndiana, United States
    751.5×
  172. 172AthensAttica, Greece
    751.5×
  173. 172BrakpanGauteng, South Africa
    751.5×
  174. 174Nakhon SawanNakhon Sawan, Thailand
    751.5×
  175. 174Ferry PassFlorida, United States
    751.5×
  176. 174KalamazooMichigan, United States
    751.5×
  177. 177VereenigingGauteng, South Africa
    741.4×
  178. 177RatchaburiRatchaburi, Thailand
    741.4×
  179. 177AostaAosta Valley, Italy
    741.4×
  180. 177KennesawGeorgia, United States
    741.4×
  181. 181ValdostaGeorgia, United States
    741.4×
  182. 182KanchanaburiKanchanaburi, Thailand
    741.4×
  183. 182AstanaAstana, Kazakhstan
    741.4×
  184. 182CelayaGuanajuato, Mexico
    741.4×
  185. 182AguascalientesAguascalientes, Mexico
    741.4×
  186. 182IndianapolisIndiana, United States
    741.4×
  187. 182NapervilleIllinois, United States
    741.4×
  188. 188PietermaritzburgKwaZulu-Natal, South Africa
    741.4×
  189. 189ReginaSaskatchewan, Canada
    741.4×
  190. 190JenisonMichigan, United States
    741.4×
  191. 191TocopillaAntofagasta, Chile
    731.4×
  192. 192PodgoricaPodgorica, Montenegro
    731.4×
  193. 192TallahasseeFlorida, United States
    731.4×
  194. 194MontgomeryAlabama, United States
    731.4×
  195. 194MilwaukeeWisconsin, United States
    731.4×
  196. 196AtlantaGeorgia, United States
    731.4×
  197. 197SasolburgFree State, South Africa
    731.4×
  198. 197NacimientoBiobio, Chile
    731.4×
  199. 197Ciudad JuárezChihuahua, Mexico
    731.4×
  200. 197ChattanoogaTennessee, United States
    731.4×

Top 200 of 2,217 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, February 21, 2024, smogrank.com/history/2024-02-21 (accessed 3 Oct 2026).

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