SmogRank / History / January 20, 2025

Most polluted cities on January 20, 2025

2,208 cities ranked by their average PM2.5 over the day; the worst was Sarajevo, Bosnia and Herzegovina, at 213.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during January 20, 2025. All episodes.

← Sarajevo 213.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for January 20, 2025, 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. 1SarajevoFederation of B&H, Bosnia and Herzegovina
    28814.2×
  2. 2KolkataWest Bengal, India
    26212.5×
  3. 3Dhakalow-cost sensorsDhaka Division, Bangladesh
    25612.1×
  4. 4DelhiDelhi, India
    24411.3×
  5. 5Lahorelow-cost sensorsPunjab, Pakistan
    24011.0×
  6. 6Novi PazarCentral Serbia, Serbia
    23810.9×
  7. 7HanoiHanoi, Vietnam
    23110.4×
  8. 8DushanbeDushanbe, Tajikistan
    22610.1×
  9. 9MumbaiMaharashtra, India
    2088.9×
  10. 10N'DjamenaN’Djaména, Chad
    2058.7×
  11. 11Ulan BatorUlaanbaatar, Mongolia
    2008.3×
  12. 12ShanghaiShanghai, China
    1957.9×
  13. 13ŻywiecSilesia, Poland
    1937.7×
  14. 14Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1877.1×
  15. 15Kathmandulow-cost sensorsBagmati Province, Nepal
    1846.8×
  16. 16Karachilow-cost sensorsSindh, Pakistan
    1806.5×
  17. 17KielceŚwiętokrzyskie, Poland
    1766.1×
  18. 18KrakówLesser Poland, Poland
    1766.1×
  19. 19Tomaszów LubelskiLublin, Poland
    1735.8×
  20. 20PubalGyeonggi-do, South Korea
    1705.5×
  21. 21HyderabadTelangana, India
    1705.5×
  22. 23CodleaBrașov County, Romania
    1685.3×
  23. 24ConakryConakry, Guinea
    1675.2×
  24. 25Abujalow-cost sensorsFCT, Nigeria
    1675.2×
  25. 26Almatylow-cost sensorsAlmaty, Kazakhstan
    1665.1×
  26. 27Icheon-siGyeonggi-do, South Korea
    1655.1×
  27. 28Bielsko-BialaSilesia, Poland
    1655.0×
  28. 29Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    1645.0×
  29. 30GwangmyeongGyeonggi-do, South Korea
    1644.9×
  30. 31LublinLublin, Poland
    1634.9×
  31. 31SeoulSeoul, South Korea
    1634.9×
  32. 33ChennaiTamil Nadu, India
    1634.8×
  33. 34Yangp'yŏngGyeonggi-do, South Korea
    1624.7×
  34. 35StarachowiceŚwiętokrzyskie, Poland
    1624.7×
  35. 36SuwonGyeonggi-do, South Korea
    1614.7×
  36. 37Gimpo-siGyeonggi-do, South Korea
    1614.6×
  37. 37ŁódźŁódź Voivodeship, Poland
    1614.6×
  38. 39Goyang-siGyeonggi-do, South Korea
    1614.6×
  39. 40GwangjuGyeonggi-do, South Korea
    1614.6×
  40. 41PyeongtaekGyeonggi-do, South Korea
    1614.6×
  41. 42Guri-siGyeonggi-do, South Korea
    1604.6×
  42. 43Bucheon-siGyeonggi-do, South Korea
    1604.6×
  43. 43Romans-sur-IsèreAuvergne-Rhône-Alpes, France
    1604.6×
  44. 45WabuGyeonggi-do, South Korea
    1604.6×
  45. 46YeojuGyeonggi-do, South Korea
    1604.6×
  46. 46MunsanGyeonggi-do, South Korea
    1604.6×
  47. 48HwadoGyeonggi-do, South Korea
    1604.5×
  48. 49KrotoszynGreater Poland, Poland
    1604.5×
  49. 50AnseongGyeonggi-do, South Korea
    1594.5×
  50. 51Skarżysko-KamiennaŚwiętokrzyskie, Poland
    1594.5×
  51. 52Ganghwa-gunIncheon, South Korea
    1594.5×
  52. 53Seongnam-siGyeonggi-do, South Korea
    1594.5×
  53. 54Khlong Sam WaBangkok, Thailand
    1594.5×
  54. 55Banja LukaSrpska, Bosnia and Herzegovina
    1594.4×
  55. 56Islamabadlow-cost sensorsIslamabad, Pakistan
    1594.4×
  56. 57Nong KhaemBangkok, Thailand
    1594.4×
  57. 57SeonghwanChungcheongnam-do, South Korea
    1594.4×
  58. 57Ansan-siGyeonggi-do, South Korea
    1594.4×
  59. 60OsanGyeonggi-do, South Korea
    1584.4×
  60. 61Uijeongbu-siGyeonggi-do, South Korea
    1584.4×
  61. 62Botevgradlow-cost sensorsSofia, Bulgaria
    1584.3×
  62. 63Hwaseong-siGyeonggi-do, South Korea
    1584.3×
  63. 64Anyang-siGyeonggi-do, South Korea
    1574.3×
  64. 65SalorTashkent Region, Uzbekistan
    1574.3×
  65. 66NiskoSubcarpathia, Poland
    1564.2×
  66. 67YangjuGyeonggi-do, South Korea
    1564.2×
  67. 68NamyangjuGyeonggi-do, South Korea
    1554.1×
  68. 69IaşiIași County, Romania
    1544.0×
  69. 70Nong ChokBangkok, Thailand
    1544.0×
  70. 71ŁaskŁódź Voivodeship, Poland
    1544.0×
  71. 72Lat KrabangBangkok, Thailand
    1544.0×
  72. 73Khan Na YaoBangkok, Thailand
    1543.9×
  73. 74ArlesProvence-Alpes-Côte d'Azur, France
    1533.9×
  74. 75IncheonIncheon, South Korea
    1533.9×
  75. 76Bueng KumBangkok, Thailand
    1533.9×
  76. 77WłocławekKujawsko-Pomorskie, Poland
    1533.9×
  77. 77Gorzów WielkopolskiLubusz, Poland
    1533.9×
  78. 79Lak SiBangkok, Thailand
    1523.8×
  79. 80ZamośćLublin, Poland
    1523.8×
  80. 81Bang KapiBangkok, Thailand
    1523.8×
  81. 81JungpyongNorth Chungcheong, South Korea
    1523.8×
  82. 81PoznańGreater Poland, Poland
    1523.8×
  83. 84KutnoŁódź Voivodeship, Poland
    1523.8×
  84. 85Taesal-liChungcheongnam-do, South Korea
    1523.8×
  85. 86DębicaSubcarpathia, Poland
    1523.8×
  86. 87AsanChungcheongnam-do, South Korea
    1513.7×
  87. 88SallanchesAuvergne-Rhône-Alpes, France
    1513.7×
  88. 89CheorwonGangwon-do, South Korea
    1513.7×
  89. 90Ban Samae DamBangkok, Thailand
    1503.7×
  90. 90CheonanChungcheongnam-do, South Korea
    1503.7×
  91. 92TangjinChungcheongnam-do, South Korea
    1493.7×
  92. 93LyonAuvergne-Rhône-Alpes, France
    1483.6×
  93. 93Sai MaiBangkok, Thailand
    1483.6×
  94. 95CairoCairo, Egypt
    1483.6×
  95. 95LegionowoMazovia, Poland
    1483.6×
  96. 95NacimientoBiobio, Chile
    1483.6×
  97. 98LubańLower Silesia, Poland
    1473.6×
  98. 99ŻyrardówMazovia, Poland
    1463.6×
  99. 100Ban Khlong PrawetBangkok, Thailand
    1453.6×
  100. 100Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    1453.6×
  101. 102YesanChungcheongnam-do, South Korea
    1443.5×
  102. 103YangonYangon, Myanmar
    1443.5×
  103. 103ValenceAuvergne-Rhône-Alpes, France
    1443.5×
  104. 105OtwockMazovia, Poland
    1433.5×
  105. 105YŏnmuChungcheongnam-do, South Korea
    1433.5×
  106. 107ShenyangLiaoning, China
    1423.5×
  107. 108ChuncheonGangwon-do, South Korea
    1413.5×
  108. 109WŏnjuGangwon-do, South Korea
    1413.5×
  109. 110KinzanChungcheongnam-do, South Korea
    1413.4×
  110. 110KoesanNorth Chungcheong, South Korea
    1413.4×
  111. 112BangkokBangkok, Thailand
    1403.4×
  112. 113Hongch’ŏnGangwon-do, South Korea
    1403.4×
  113. 114Mueang NonthaburiNonthaburi, Thailand
    1403.4×
  114. 114Bang NaBangkok, Thailand
    1403.4×
  115. 114BoryeongChungcheongnam-do, South Korea
    1403.4×
  116. 117SeosanChungcheongnam-do, South Korea
    1393.4×
  117. 117KranjUrban Municipality of Kranj, Slovenia
    1393.4×
  118. 119CeljeUrban Municipality of Celje, Slovenia
    1393.4×
  119. 119SejongSejong-si, South Korea
    1393.4×
  120. 121YeongjuGyeongsangbuk-do, South Korea
    1383.4×
  121. 122KigaliKigali, Rwanda
    1373.3×
  122. 122GaigeturiJeju-do, South Korea
    1373.3×
  123. 124RuseRuse, Bulgaria
    1363.3×
  124. 125BuyeoChungcheongnam-do, South Korea
    1363.3×
  125. 125Jelenia GóraLower Silesia, Poland
    1363.3×
  126. 127BucharestBucharest, Romania
    1353.3×
  127. 127HongseongChungcheongnam-do, South Korea
    1353.3×
  128. 129YeongdongNorth Chungcheong, South Korea
    1353.3×
  129. 129Donghae CityGangwon-do, South Korea
    1353.3×
  130. 131HanamGyeonggi-do, South Korea
    1353.3×
  131. 132Sevlievolow-cost sensorsGabrovo, Bulgaria
    1343.3×
  132. 132ÉpinalGrand Est, France
    1343.3×
  133. 134Jeju CityJeju-do, South Korea
    1343.3×
  134. 135RadomMazovia, Poland
    1333.2×
  135. 135IksanJeollabuk-do, South Korea
    1333.2×
  136. 137GunsanJeollabuk-do, South Korea
    1323.2×
  137. 137GumiGyeongsangbuk-do, South Korea
    1323.2×
  138. 139Cheongju-siNorth Chungcheong, South Korea
    1323.2×
  139. 140Villefranche-sur-SaôneAuvergne-Rhône-Alpes, France
    1323.2×
  140. 141ChungjuNorth Chungcheong, South Korea
    1313.2×
  141. 141ToruńKujawsko-Pomorskie, Poland
    1313.2×
  142. 143OkcheonNorth Chungcheong, South Korea
    1313.2×
  143. 144SantyokuGangwon-do, South Korea
    1303.2×
  144. 144SzczecinWest Pomerania, Poland
    1303.2×
  145. 146RadomskoŁódź Voivodeship, Poland
    1303.1×
  146. 147MariborUrban Municipality of Maribor, Slovenia
    1293.1×
  147. 148HillegomSouth Holland, The Netherlands
    1283.1×
  148. 148TrbovljeMunicipality of Trbovlje, Slovenia
    1283.1×
  149. 150GangneungGangwon-do, South Korea
    1283.1×
  150. 151SchiedamSouth Holland, The Netherlands
    1283.1×
  151. 152StrasbourgGrand Est, France
    1273.1×
  152. 153KosongGangwon-do, South Korea
    1273.1×
  153. 153AvignonProvence-Alpes-Côte d'Azur, France
    1273.1×
  154. 155KehlBaden-Wurttemberg, Germany
    1273.1×
  155. 155SulechówLubusz, Poland
    1273.1×
  156. 157Chinch'ŏnNorth Chungcheong, South Korea
    1273.1×
  157. 158Dimitrovgradlow-cost sensorsHaskovo, Bulgaria
    1263.1×
  158. 159SeogwipoJeju-do, South Korea
    1263.0×
  159. 160SokchoGangwon-do, South Korea
    1263.0×
  160. 161The HagueSouth Holland, The Netherlands
    1253.0×
  161. 162GuangzhouGuangdong, China
    1253.0×
  162. 162Gyeongsan-siGyeongsangbuk-do, South Korea
    1253.0×
  163. 162PtujUrban Municipality of Ptuj, Slovenia
    1253.0×
  164. 165KimjeJeollabuk-do, South Korea
    1243.0×
  165. 166Haskovolow-cost sensorsHaskovo, Bulgaria
    1243.0×
  166. 166HayangGyeongsangbuk-do, South Korea
    1243.0×
  167. 166MeylanAuvergne-Rhône-Alpes, France
    1243.0×
  168. 169BuanJeollabuk-do, South Korea
    1233.0×
  169. 170BorCentral Serbia, Serbia
    1222.9×
  170. 171SangjuGyeongsangbuk-do, South Korea
    1222.9×
  171. 172HwacheonGangwon-do, South Korea
    1212.9×
  172. 173MielecSubcarpathia, Poland
    1212.9×
  173. 173ThionvilleGrand Est, France
    1212.9×
  174. 175MaldegemFlanders, Belgium
    1212.9×
  175. 176RotterdamSouth Holland, The Netherlands
    1202.9×
  176. 176ŚwinoujścieWest Pomerania, Poland
    1202.9×
  177. 178KłodzkoLower Silesia, Poland
    1202.9×
  178. 179MedemblikNorth Holland, The Netherlands
    1202.9×
  179. 179KaliszGreater Poland, Poland
    1202.9×
  180. 181Liptovský Mikulᚎilina Region, Slovakia
    1192.9×
  181. 182RoeselareFlanders, Belgium
    1182.8×
  182. 183Gabrovolow-cost sensorsGabrovo, Bulgaria
    1182.8×
  183. 183EisenGyeongsangbuk-do, South Korea
    1182.8×
  184. 185Tuen MunTuen Mun, Hong Kong
    1182.8×
  185. 186PrzemyślSubcarpathia, Poland
    1172.8×
  186. 187NonsanChungcheongnam-do, South Korea
    1172.8×
  187. 188GdyniaPomerania, Poland
    1172.8×
  188. 189Saint-ÉtienneAuvergne-Rhône-Alpes, France
    1172.8×
  189. 190Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    1162.8×
  190. 190MaarssenUtrecht, The Netherlands
    1162.8×
  191. 192WarsawMazovia, Poland
    1162.8×
  192. 193DaeguDaegu, South Korea
    1152.7×
  193. 193Novo MestoUrban Municipality of Novo Mesto, Slovenia
    1152.7×
  194. 195LampangLampang, Thailand
    1152.7×
  195. 195GimcheonGyeongsangbuk-do, South Korea
    1152.7×
  196. 195EisenhüttenstadtBrandenburg, Germany
    1152.7×
  197. 198SiedlceMazovia, Poland
    1152.7×
  198. 198HwawŏnDaegu, South Korea
    1152.7×
  199. 198Frankfurt (Oder)Brandenburg, Germany
    1152.7×

Top 200 of 2,208 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, January 20, 2025, smogrank.com/history/2025-01-20 (accessed 2 Oct 2026).

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