SmogRank / History / January 21, 2024

Most polluted cities on January 21, 2024

1,971 cities ranked by their average PM2.5 over the day; the worst was Peshawar, Pakistan, at 340.0 µg/m³. Each city's own local calendar day.

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

← Peshawar 340.0 µg/m³ 300 µg/m³15 WHO 24-hour guideline
Every city ranked for January 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. 1Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    500+22.7×
  2. 2KolkataWest Bengal, India
    34816.6×
  3. 3Dhakalow-cost sensorsDhaka Division, Bangladesh
    33816.3×
  4. 4Lahorelow-cost sensorsPunjab, Pakistan
    29414.6×
  5. 5DelhiDelhi, India
    28013.7×
  6. 6Islamabadlow-cost sensorsIslamabad, Pakistan
    27813.5×
  7. 7CairoCairo, Egypt
    25512.0×
  8. 7N'DjamenaN’Djaména, Chad
    25512.0×
  9. 9PljevljaPljevlja, Montenegro
    1967.9×
  10. 10SalorTashkent Region, Uzbekistan
    1846.9×
  11. 11SarajevoFederation of B&H, Bosnia and Herzegovina
    1846.8×
  12. 12Karachilow-cost sensorsSindh, Pakistan
    1806.5×
  13. 13Abujalow-cost sensorsFCT, Nigeria
    1796.3×
  14. 14Ulan BatorUlaanbaatar, Mongolia
    1745.8×
  15. 15Banja LukaSrpska, Bosnia and Herzegovina
    1604.5×
  16. 16MumbaiMaharashtra, India
    1594.5×
  17. 17Kathmandulow-cost sensorsBagmati Province, Nepal
    1584.4×
  18. 18DejCluj County, Romania
    1574.3×
  19. 19KigaliKigali, Rwanda
    1574.2×
  20. 20LazarevacCentral Serbia, Serbia
    1574.2×
  21. 21OlomoucOlomouc Region, Czechia
    1564.2×
  22. 22PančevoVojvodina, Serbia
    1554.1×
  23. 23MiskolcBorsod-Abaúj-Zemplén, Hungary
    1533.9×
  24. 24DziałdowoWarmia-Masuria, Poland
    1533.9×
  25. 25BelgradeCentral Serbia, Serbia
    1523.8×
  26. 26DěčínÚstí nad Labem Region, Czechia
    1523.8×
  27. 27ZemunCentral Serbia, Serbia
    1513.7×
  28. 28CalgaryAlberta, Canada
    1513.7×
  29. 29YangonYangon, Myanmar
    1503.7×
  30. 30DushanbeDushanbe, Tajikistan
    1483.6×
  31. 31SremčicaCentral Serbia, Serbia
    1483.6×
  32. 32Bang KapiBangkok, Thailand
    1453.6×
  33. 33Khlong Sam WaBangkok, Thailand
    1443.5×
  34. 34NišCentral Serbia, Serbia
    1443.5×
  35. 35Khan Na YaoBangkok, Thailand
    1403.4×
  36. 36Lat KrabangBangkok, Thailand
    1403.4×
  37. 37AstanaAstana, Kazakhstan
    1393.4×
  38. 38Bang NaBangkok, Thailand
    1383.4×
  39. 39KłodzkoLower Silesia, Poland
    1383.4×
  40. 40Nong KhaemBangkok, Thailand
    1373.3×
  41. 41ObrenovacCentral Serbia, Serbia
    1363.3×
  42. 42TepliceÚstí nad Labem Region, Czechia
    1343.2×
  43. 43PřerovOlomouc Region, Czechia
    1333.2×
  44. 44Lak SiBangkok, Thailand
    1323.2×
  45. 45Nong ChokBangkok, Thailand
    1313.2×
  46. 46Bueng KumBangkok, Thailand
    1313.2×
  47. 47KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    1293.1×
  48. 48Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    1283.1×
  49. 49BerounCentral Bohemia, Czechia
    1273.1×
  50. 50Ban Samae DamBangkok, Thailand
    1263.0×
  51. 51Saphan SungBangkok, Thailand
    1253.0×
  52. 52Samut SakhonSamut Sakhon, Thailand
    1222.9×
  53. 53HyderabadTelangana, India
    1202.9×
  54. 54Mladá BoleslavCentral Bohemia, Czechia
    1182.8×
  55. 55Ban Khlong PrawetBangkok, Thailand
    1182.8×
  56. 55Sai MaiBangkok, Thailand
    1182.8×
  57. 57Hradec KrálovéHradec Králové Region, Czechia
    1182.8×
  58. 57CapannoriTuscany, Italy
    1182.8×
  59. 59Mueang NonthaburiNonthaburi, Thailand
    1172.8×
  60. 60HelenaMontana, United States
    1162.8×
  61. 61LitvínovÚstí nad Labem Region, Czechia
    1152.8×
  62. 62Bang Bo DistrictSamut Prakan, Thailand
    1142.7×
  63. 63ŽilinaŽilina Region, Slovakia
    1142.7×
  64. 64ZgierzŁódź Voivodeship, Poland
    1132.7×
  65. 65Ústí nad LabemÚstí nad Labem Region, Czechia
    1132.7×
  66. 66Nakhon PathomNakhon Pathom, Thailand
    1122.7×
  67. 67BangkokBangkok, Thailand
    1102.6×
  68. 68HumennéPrešov Region, Slovakia
    1092.6×
  69. 69EtwatwaGauteng, South Africa
    1082.6×
  70. 70Phra PradaengSamut Prakan, Thailand
    1082.5×
  71. 70PardubicePardubice Region, Czechia
    1082.5×
  72. 72PilsenPlzeň Region, Czechia
    1072.5×
  73. 73MostÚstí nad Labem Region, Czechia
    1062.5×
  74. 74MainzRheinland-Pfalz, Germany
    1052.5×
  75. 75Skarżysko-KamiennaŚwiętokrzyskie, Poland
    1052.5×
  76. 75AirdrieAlberta, Canada
    1052.5×
  77. 77OpoleOpole Voivodeship, Poland
    1042.5×
  78. 78Spišská Nová VesKošice Region, Slovakia
    1042.4×
  79. 79BakuBaki, Azerbaijan
    1042.4×
  80. 80Limburg an der LahnHesse, Germany
    1032.4×
  81. 81LimaLima Province, Peru
    1032.4×
  82. 82CallaoCallao, Peru
    1022.4×
  83. 83TocopillaAntofagasta, Chile
    1022.4×
  84. 84KavadarciKavadarci, North Macedonia
    1002.4×
  85. 85Vranov nad TopľouPrešov Region, Slovakia
    1002.4×
  86. 85Rüsselsheim am MainHesse, Germany
    1002.4×
  87. 87Santa Anita - Los FicusLima region, Peru
    992.3×
  88. 88TetovoTetovo, North Macedonia
    982.3×
  89. 88SpeyerRheinland-Pfalz, Germany
    982.3×
  90. 90DębicaSubcarpathia, Poland
    982.3×
  91. 91Jastrzębie ZdrójSilesia, Poland
    982.3×
  92. 92Lauda-KönigshofenBaden-Wurttemberg, Germany
    972.3×
  93. 93KošiceKošice Region, Slovakia
    972.3×
  94. 93BitolaBitola, North Macedonia
    972.3×
  95. 95AlessandriaPiedmont, Italy
    962.2×
  96. 96EschbornHesse, Germany
    962.2×
  97. 96TrenčínTrenčín Region, Slovakia
    962.2×
  98. 98Almatylow-cost sensorsAlmaty, Kazakhstan
    952.2×
  99. 99PécsBaranya, Hungary
    952.2×
  100. 99KatowiceSilesia, Poland
    952.2×
  101. 101WłocławekKujawsko-Pomorskie, Poland
    942.2×
  102. 102WiesbadenHesse, Germany
    942.1×
  103. 103ThionvilleGrand Est, France
    942.1×
  104. 103ArlesProvence-Alpes-Côte d'Azur, France
    942.1×
  105. 105ZlínZlín, Czechia
    932.1×
  106. 106HualpénBiobio, Chile
    932.1×
  107. 107MontbéliardBourgogne-Franche-Comté, France
    932.1×
  108. 108VelesVeles, North Macedonia
    932.1×
  109. 109Samut PrakanSamut Prakan, Thailand
    922.1×
  110. 109Hanau am MainHesse, Germany
    922.1×
  111. 111IaşiIași County, Romania
    922.1×
  112. 111AvignonProvence-Alpes-Côte d'Azur, France
    922.1×
  113. 111Jelenia GóraLower Silesia, Poland
    922.1×
  114. 114ZnojmoSouth Moravian, Czechia
    922.1×
  115. 115ChennaiTamil Nadu, India
    922.1×
  116. 115Frankfurt am MainHesse, Germany
    922.1×
  117. 117NîmesOccitanie, France
    912.1×
  118. 118Cluj-NapocaCluj County, Romania
    912.0×
  119. 118HanoiHanoi, Vietnam
    912.0×
  120. 118MannheimBaden-Wurttemberg, Germany
    912.0×
  121. 121GardanneProvence-Alpes-Côte d'Azur, France
    912.0×
  122. 121PłockMazovia, Poland
    912.0×
  123. 121Czechowice-DziedziceSilesia, Poland
    912.0×
  124. 124Bad KreuznachRheinland-Pfalz, Germany
    902.0×
  125. 125KutnoŁódź Voivodeship, Poland
    902.0×
  126. 126ManamaManama, Bahrain
    902.0×
  127. 126Marburg an der LahnHesse, Germany
    902.0×
  128. 126GießenHesse, Germany
    902.0×
  129. 129NiskoSubcarpathia, Poland
    892.0×
  130. 130Novi SadVojvodina, Serbia
    892.0×
  131. 131PrievidzaTrenčín Region, Slovakia
    892.0×
  132. 131GreeleyColorado, United States
    892.0×
  133. 133PrešovPrešov Region, Slovakia
    892.0×
  134. 133HeilbronnBaden-Wurttemberg, Germany
    892.0×
  135. 133OurenseGalicia, Spain
    892.0×
  136. 136TalcahuanoBiobio, Chile
    881.9×
  137. 137GrazStyria, Austria
    881.9×
  138. 138MidrandGauteng, South Africa
    871.9×
  139. 139Sevlievolow-cost sensorsGabrovo, Bulgaria
    871.9×
  140. 139Ludwigshafen am RheinRheinland-Pfalz, Germany
    871.9×
  141. 139HualquiBiobio, Chile
    871.9×
  142. 142KarlsruheBaden-Wurttemberg, Germany
    871.9×
  143. 143MielecSubcarpathia, Poland
    871.9×
  144. 143ŽideniceSouth Moravian, Czechia
    871.9×
  145. 143RacibórzSilesia, Poland
    871.9×
  146. 146TraunUpper Austria, Austria
    861.9×
  147. 146SantiagoSantiago Metropolitan, Chile
    861.9×
  148. 146PendletonOregon, United States
    861.9×
  149. 149JarosławSubcarpathia, Poland
    861.8×
  150. 149PartizánskeTrenčín Region, Slovakia
    861.8×
  151. 151HamarInnlandet, Norway
    851.8×
  152. 152WormsRheinland-Pfalz, Germany
    851.8×
  153. 153Salon-de-ProvenceProvence-Alpes-Côte d'Azur, France
    851.8×
  154. 153HavířovMoravian-Silesian Region, Czechia
    851.8×
  155. 153BrnoSouth Moravian, Czechia
    851.8×
  156. 153ToméBiobio, Chile
    851.8×
  157. 157LampertheimHesse, Germany
    851.8×
  158. 157KadaňÚstí nad Labem Region, Czechia
    851.8×
  159. 159Fos-sur-MerProvence-Alpes-Côte d'Azur, France
    851.8×
  160. 160Romans-sur-IsèreAuvergne-Rhône-Alpes, France
    851.8×
  161. 161PrzemyślSubcarpathia, Poland
    841.8×
  162. 161Valašské MeziříčíZlín, Czechia
    841.8×
  163. 163EvatonGauteng, South Africa
    841.8×
  164. 163KrakówLesser Poland, Poland
    841.8×
  165. 163QuinteroValparaiso, Chile
    841.8×
  166. 163LewistonIdaho, United States
    841.8×
  167. 167GjøvikInnlandet, Norway
    841.8×
  168. 168Frýdek-MístekMoravian-Silesian Region, Czechia
    841.8×
  169. 169Mollet del VallèsCatalonia, Spain
    841.8×
  170. 170StarachowiceŚwiętokrzyskie, Poland
    831.8×
  171. 170OtwockMazovia, Poland
    831.8×
  172. 170LublinLublin, Poland
    831.8×
  173. 173TübingenBaden-Wurttemberg, Germany
    831.8×
  174. 173KladnoCentral Bohemia, Czechia
    831.8×
  175. 173NysaOpole Voivodeship, Poland
    831.8×
  176. 173RengoO'Higgins Region, Chile
    831.8×
  177. 173Puente AltoSantiago Metropolitan, Chile
    831.8×
  178. 178JeddahMecca Region, Saudi Arabia
    831.7×
  179. 178LyonAuvergne-Rhône-Alpes, France
    831.7×
  180. 180LegionowoMazovia, Poland
    821.7×
  181. 181RadomMazovia, Poland
    821.7×
  182. 181MartinŽilina Region, Slovakia
    821.7×
  183. 183Eggenstein-LeopoldshafenBaden-Wurttemberg, Germany
    821.7×
  184. 184San Pedro de la PazBiobio, Chile
    821.7×
  185. 185OlsztynWarmia-Masuria, Poland
    821.7×
  186. 186DarmstadtHesse, Germany
    821.7×
  187. 186ŁódźŁódź Voivodeship, Poland
    821.7×
  188. 188SokolovCarlsbad Region, Czechia
    811.7×
  189. 189ŁaskŁódź Voivodeship, Poland
    811.7×
  190. 189TalaganteSantiago Metropolitan, Chile
    811.7×
  191. 191ŻyrardówMazovia, Poland
    811.7×
  192. 192PassauBavaria, Germany
    801.7×
  193. 192DillingenSaarland, Germany
    801.7×
  194. 194PristinaPristina, Kosovo
    801.7×
  195. 194ManlleuCatalonia, Spain
    801.7×
  196. 196BritsNorth West, South Africa
    801.6×
  197. 196AsahikawaHokkaido, Japan
    801.6×
  198. 196BensheimHesse, Germany
    801.6×
  199. 196CoronelBiobio, Chile
    801.6×
  200. 200Şabāḩ as SālimMubārak al Kabīr, Kuwait
    801.6×

Top 200 of 1,971 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, January 21, 2024, smogrank.com/history/2024-01-21 (accessed 3 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.