SmogRank / History / January 25, 2025

Most polluted cities on January 25, 2025

2,300 cities ranked by their average PM2.5 over the day; the worst was N'Djamena, Chad, at 240.0 µg/m³. Each city's own local calendar day.

Bad-air episodes during January 25, 2025. All episodes.

← N'Djamena 240.0 µg/m³ 200 µg/m³15 WHO 24-hour guideline
Every city ranked for January 25, 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. 1N'DjamenaN’Djaména, Chad
    33016.0×
  2. 2Dhakalow-cost sensorsDhaka Division, Bangladesh
    29814.9×
  3. 3KolkataWest Bengal, India
    28213.8×
  4. 4Lahorelow-cost sensorsPunjab, Pakistan
    25612.1×
  5. 5Kampalalow-cost sensorsCentral Region, Uganda
    23710.8×
  6. 6Banja LukaSrpska, Bosnia and Herzegovina
    1927.6×
  7. 7MumbaiMaharashtra, India
    1917.5×
  8. 8Khlong LuangPathum Thani, Thailand
    1856.9×
  9. 9BeijingBeijing, China
    1836.7×
  10. 10Nakhon LuangPhra Nakhon Si Ayutthaya, Thailand
    1826.7×
  11. 11Peshawarlow-cost sensorsKhyber Pakhtunkhwa, Pakistan
    1826.6×
  12. 12Sing BuriSing Buri, Thailand
    1816.6×
  13. 13Chai NatChai Nat, Thailand
    1806.5×
  14. 14Si Maha PhotPrachin Buri, Thailand
    1806.4×
  15. 16BaghdadBaghdad, Iraq
    1786.3×
  16. 17Lop BuriLopburi, Thailand
    1786.3×
  17. 18Prachin BuriPrachin Buri, Thailand
    1786.2×
  18. 19Nong ChokBangkok, Thailand
    1786.2×
  19. 20Khan Na YaoBangkok, Thailand
    1766.1×
  20. 21Bueng KumBangkok, Thailand
    1745.9×
  21. 22Bishkeklow-cost sensorsBishkek, Kyrgyzstan
    1745.9×
  22. 23Khlong Sam WaBangkok, Thailand
    1745.8×
  23. 24SukhothaiSukhothai, Thailand
    1715.6×
  24. 25Lat KrabangBangkok, Thailand
    1715.6×
  25. 26TravnikFederation of B&H, Bosnia and Herzegovina
    1715.6×
  26. 27PhetchaburiPhetchaburi, Thailand
    1715.6×
  27. 28YasothonYasothon, Thailand
    1705.5×
  28. 28Bang NaBangkok, Thailand
    1705.5×
  29. 30AranyaprathetSa Kaeo, Thailand
    1705.5×
  30. 31Bang KapiBangkok, Thailand
    1685.3×
  31. 32Nong KhaemBangkok, Thailand
    1675.3×
  32. 33KalasinKalasin, Thailand
    1675.3×
  33. 34Kathmandulow-cost sensorsBagmati Province, Nepal
    1675.2×
  34. 35ChaiyaphumChaiyaphum, Thailand
    1675.2×
  35. 36Ubon RatchathaniUbon Ratchathani, Thailand
    1665.2×
  36. 37Lak SiBangkok, Thailand
    1655.1×
  37. 38SalorTashkent Region, Uzbekistan
    1644.9×
  38. 39Almatylow-cost sensorsAlmaty, Kazakhstan
    1644.9×
  39. 39Ban Khlong PrawetBangkok, Thailand
    1644.9×
  40. 41Ban ChangRayong, Thailand
    1634.8×
  41. 42DelhiDelhi, India
    1624.8×
  42. 43Bang Bo DistrictSamut Prakan, Thailand
    1614.7×
  43. 44ShenyangLiaoning, China
    1614.7×
  44. 45Khon KaenKhon Kaen, Thailand
    1614.7×
  45. 45Sai MaiBangkok, Thailand
    1614.7×
  46. 47RatchaburiRatchaburi, Thailand
    1604.6×
  47. 48Udon ThaniUdon Thani, Thailand
    1604.6×
  48. 48Samut SakhonSamut Sakhon, Thailand
    1604.6×
  49. 48Ban Talat BuengChon Buri, Thailand
    1604.6×
  50. 51SaraburiSaraburi, Thailand
    1604.5×
  51. 52Buri RamBuriram, Thailand
    1604.5×
  52. 53Roi EtRoi Et, Thailand
    1594.5×
  53. 53Phra PradaengSamut Prakan, Thailand
    1594.5×
  54. 55SurinSurin, Thailand
    1594.5×
  55. 56Phra Nakhon Si AyutthayaPhra Nakhon Si Ayutthaya, Thailand
    1594.5×
  56. 57Islamabadlow-cost sensorsIslamabad, Pakistan
    1594.4×
  57. 58BangkokBangkok, Thailand
    1574.3×
  58. 59Laem ChabangChon Buri, Thailand
    1574.3×
  59. 60RayongRayong, Thailand
    1564.2×
  60. 60Nakhon SawanNakhon Sawan, Thailand
    1564.2×
  61. 62Nakhon RatchasimaNakhon Ratchasima, Thailand
    1564.2×
  62. 63Abujalow-cost sensorsFCT, Nigeria
    1564.2×
  63. 64Mueang NonthaburiNonthaburi, Thailand
    1564.2×
  64. 65MukdahanMukdahan, Thailand
    1564.2×
  65. 66Karachilow-cost sensorsSindh, Pakistan
    1564.1×
  66. 67PhichitPhichit, Thailand
    1564.1×
  67. 68Maha SarakhamMaha Sarakham, Thailand
    1554.1×
  68. 68Ban Samae DamBangkok, Thailand
    1554.1×
  69. 70Suphan BuriSuphan Buri, Thailand
    1554.1×
  70. 71Ban PhaeoSamut Sakhon, Thailand
    1544.0×
  71. 72Nong Bua LamphuNong Bua Lamphu, Thailand
    1544.0×
  72. 73NanNan, Thailand
    1543.9×
  73. 74PhetchabunPhetchabun, Thailand
    1533.9×
  74. 75Amnat CharoenAmnat Charoen, Thailand
    1533.9×
  75. 76UttaraditUttaradit, Thailand
    1533.9×
  76. 77SarajevoFederation of B&H, Bosnia and Herzegovina
    1533.9×
  77. 78TratTrat, Thailand
    1523.8×
  78. 79Mae SotTak, Thailand
    1523.8×
  79. 80Kinshasalow-cost sensorsKinshasa, Democratic Republic of the Congo
    1523.8×
  80. 81LoeiLoei, Thailand
    1523.8×
  81. 82ChanthaburiChanthaburi, Thailand
    1513.7×
  82. 83Nakhon PathomNakhon Pathom, Thailand
    1483.6×
  83. 84CairoCairo, Egypt
    1483.6×
  84. 85Kamphaeng PhetKamphaeng Phet, Thailand
    1473.6×
  85. 86PhraePhrae, Thailand
    1463.6×
  86. 87LampangLampang, Thailand
    1443.5×
  87. 88DushanbeDushanbe, Tajikistan
    1423.5×
  88. 89LazarevacCentral Serbia, Serbia
    1413.5×
  89. 90Samut PrakanSamut Prakan, Thailand
    1383.4×
  90. 91PhayaoPhayao, Thailand
    1353.3×
  91. 92ZemunCentral Serbia, Serbia
    1353.3×
  92. 93Sakon NakhonSakon Nakhon, Thailand
    1313.2×
  93. 94YangonYangon, Myanmar
    1293.1×
  94. 95HyderabadTelangana, India
    1273.1×
  95. 96ChennaiTamil Nadu, India
    1263.0×
  96. 97TijuanaBaja California, Mexico
    1263.0×
  97. 98Nakhon NayokNakhon Nayok, Thailand
    1243.0×
  98. 99KigaliKigali, Rwanda
    1212.9×
  99. 100XonacatlánMéxico, Mexico
    1182.8×
  100. 102ChumphonChumphon, Thailand
    1162.8×
  101. 103BelgradeCentral Serbia, Serbia
    1142.7×
  102. 104PančevoVojvodina, Serbia
    1132.7×
  103. 105KaohsiungTakao, Taiwan
    1132.7×
  104. 106Naucalpan de JuárezMéxico, Mexico
    1102.6×
  105. 107AthensAttica, Greece
    1102.6×
  106. 107Chiayi CityTaiwan, Taiwan
    1102.6×
  107. 109Chula VistaCalifornia, United States
    1092.6×
  108. 110Abidjanlow-cost sensorsAbidjan Autonomous District, Ivory Coast
    1092.6×
  109. 111MiskolcBorsod-Abaúj-Zemplén, Hungary
    1092.6×
  110. 112PúchovTrenčín Region, Slovakia
    1082.6×
  111. 113HanoiHanoi, Vietnam
    1072.5×
  112. 113LleidaCatalonia, Spain
    1072.5×
  113. 115KrakówLesser Poland, Poland
    1072.5×
  114. 116YongkangTaiwan, Taiwan
    1042.5×
  115. 116XinyingTaiwan, Taiwan
    1042.5×
  116. 118ThessaloníkiCentral Macedonia, Greece
    1042.4×
  117. 118FengshanTakao, Taiwan
    1042.4×
  118. 120TainanTaiwan, Taiwan
    1032.4×
  119. 121LitvínovÚstí nad Labem Region, Czechia
    1012.4×
  120. 122AugustówPodlasie, Poland
    1012.4×
  121. 124Chiang RaiChiang Rai, Thailand
    982.3×
  122. 125DouliuTaiwan, Taiwan
    982.3×
  123. 126MonterreyNuevo León, Mexico
    972.3×
  124. 127ObrenovacCentral Serbia, Serbia
    972.3×
  125. 128LamphunLamphun, Thailand
    972.3×
  126. 129Mae SaiChiang Rai, Thailand
    972.2×
  127. 130Czechowice-DziedziceSilesia, Poland
    942.1×
  128. 131KazincbarcikaBorsod-Abaúj-Zemplén, Hungary
    942.1×
  129. 132Prince GeorgeBritish Columbia, Canada
    932.1×
  130. 133KinzanChungcheongnam-do, South Korea
    922.1×
  131. 134Addis AbabaAddis Ababa, Ethiopia
    922.1×
  132. 134BucharestBucharest, Romania
    922.1×
  133. 136Botevgradlow-cost sensorsSofia, Bulgaria
    922.1×
  134. 137ChiguayanteBiobio, Chile
    922.1×
  135. 138Quezon Citylow-cost sensorsNational Capital Region, Philippines
    912.1×
  136. 139Hua HinPrachuap Khiri Khan, Thailand
    912.0×
  137. 139MostÚstí nad Labem Region, Czechia
    912.0×
  138. 141AshgabatAshgabat, Turkmenistan
    902.0×
  139. 142ŽilinaŽilina Region, Slovakia
    902.0×
  140. 143KošiceKošice Region, Slovakia
    902.0×
  141. 144NacimientoBiobio, Chile
    902.0×
  142. 145NyíregyházaSzabolcs-Szatmár-Bereg, Hungary
    902.0×
  143. 145ZhushanTaiwan, Taiwan
    902.0×
  144. 147Istanbullow-cost sensorsIstanbul, Turkey
    892.0×
  145. 148YesanChungcheongnam-do, South Korea
    892.0×
  146. 149SinanJeollanam-do, South Korea
    892.0×
  147. 150ChaozhouTaiwan, Taiwan
    881.9×
  148. 151Ciudad NezahualcoyotlMéxico, Mexico
    881.9×
  149. 152SejongSejong-si, South Korea
    871.9×
  150. 153YeonggwangJeollanam-do, South Korea
    871.9×
  151. 154NajuJeollanam-do, South Korea
    871.9×
  152. 154HongseongChungcheongnam-do, South Korea
    871.9×
  153. 156BuanJeollabuk-do, South Korea
    861.9×
  154. 156AsanChungcheongnam-do, South Korea
    861.9×
  155. 158PalmaBalearic Islands, Spain
    861.9×
  156. 159DejCluj County, Romania
    861.9×
  157. 159LancasterPennsylvania, United States
    861.9×
  158. 161SeonghwanChungcheongnam-do, South Korea
    851.8×
  159. 161PubalGyeonggi-do, South Korea
    851.8×
  160. 161TrenčínTrenčín Region, Slovakia
    851.8×
  161. 161Ecatepec de MorelosMéxico, Mexico
    851.8×
  162. 161San DiegoCalifornia, United States
    851.8×
  163. 166RužomberokŽilina Region, Slovakia
    851.8×
  164. 167Tomaszów LubelskiLublin, Poland
    851.8×
  165. 168BuyeoChungcheongnam-do, South Korea
    851.8×
  166. 168MokpoJeollanam-do, South Korea
    851.8×
  167. 170Mexico CityMexico City, Mexico
    851.8×
  168. 171OtwockMazovia, Poland
    841.8×
  169. 172OlomoucOlomouc Region, Czechia
    831.8×
  170. 173QuinteroValparaiso, Chile
    831.8×
  171. 174SremčicaCentral Serbia, Serbia
    831.8×
  172. 175CheonanChungcheongnam-do, South Korea
    831.7×
  173. 176Cheongju-siNorth Chungcheong, South Korea
    831.7×
  174. 176YeongamJeollanam-do, South Korea
    831.7×
  175. 178Chiang MaiChiang Mai, Thailand
    821.7×
  176. 179YeongdongNorth Chungcheong, South Korea
    821.7×
  177. 180BeigangTaiwan, Taiwan
    821.7×
  178. 180MasanGwangju, South Korea
    821.7×
  179. 182PátraWest Greece, Greece
    821.7×
  180. 182HaenamJeollanam-do, South Korea
    821.7×
  181. 184KimjeJeollabuk-do, South Korea
    811.7×
  182. 185LučenecBanská Bystrica Region, Slovakia
    811.7×
  183. 186TaibaoTaiwan, Taiwan
    811.7×
  184. 186KadaňÚstí nad Labem Region, Czechia
    811.7×
  185. 188Cluj-NapocaCluj County, Romania
    801.7×
  186. 188PezinokBratislava Region, Slovakia
    801.7×
  187. 188MartinŽilina Region, Slovakia
    801.7×
  188. 191YŏnmuChungcheongnam-do, South Korea
    801.7×
  189. 192CodleaBrașov County, Romania
    801.6×
  190. 192KoperUrban Municipality of Koper, Slovenia
    801.6×
  191. 195TrebišovKošice Region, Slovakia
    801.6×
  192. 195OpoleOpole Voivodeship, Poland
    801.6×
  193. 197ZgierzŁódź Voivodeship, Poland
    801.6×
  194. 198PrešovPrešov Region, Slovakia
    801.6×
  195. 199PrzemyślSubcarpathia, Poland
    791.6×
  196. 199TangjinChungcheongnam-do, South Korea
    791.6×

Top 200 of 2,300 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 25, 2025, smogrank.com/history/2025-01-25 (accessed 2 Oct 2026).

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