SmogRank / World / South Korea / January 2026

Most polluted cities in South Korea, January 2026

135 cities in South Korea ranked by their average PM2.5 over the 31 days. Worst: Kimje at 25.7 µg/m³, #220 of 2,281 cities in the world. Cleanest: Kosong at 9.9. A city needs measurements on 70% of the days to be ranked.

← Kimje 25.7
Every city in South Korea ranked for January 2026, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1KimjeJeollabuk-do
    25.7
  2. 2YeongjuGyeongsangbuk-do
    24.8
  3. 2SeonghwanChungcheongnam-do
    24.8
  4. 4OkcheonNorth Chungcheong
    24.5
  5. 5SangjuGyeongsangbuk-do
    24.1
  6. 6PubalGyeonggi-do
    24.0
  7. 7KinzanChungcheongnam-do
    23.4
  8. 8YeongdongNorth Chungcheong
    23.2
  9. 8WŏnjuGangwon-do
    23.2
  10. 10HwadoGyeonggi-do
    22.9
  11. 11AsanChungcheongnam-do
    22.8
  12. 12Cheongju-siNorth Chungcheong
    22.3
  13. 13Chinch'ŏnNorth Chungcheong
    22.2
  14. 14ChungjuNorth Chungcheong
    21.8
  15. 15KoesanNorth Chungcheong
    21.6
  16. 16YeojuGyeonggi-do
    21.5
  17. 17SejongSejong-si
    21.3
  18. 18GumiGyeongsangbuk-do
    21.1
  19. 18JungpyongNorth Chungcheong
    21.1
  20. 20CheorwonGangwon-do
    21.0
  21. 20WabuGyeonggi-do
    21.0
  22. 22BuanJeollabuk-do
    20.7
  23. 22GwangjuGyeonggi-do
    20.7
  24. 22JeongeupJeollabuk-do
    20.7
  25. 25GapyeongGyeonggi-do
    20.6
  26. 26SeoulSeoul
    20.3
  27. 26Gimpo-siGyeonggi-do
    20.3
  28. 28HongseongChungcheongnam-do
    20.1
  29. 29Yangp'yŏngGyeonggi-do
    20.0
  30. 29GwangmyeongGyeonggi-do
    20.0
  31. 31Ganghwa-gunIncheon
    19.9
  32. 32GimcheonGyeongsangbuk-do
    19.8
  33. 33Guri-siGyeonggi-do
    19.7
  34. 33NamyangjuGyeonggi-do
    19.7
  35. 35MunsanGyeonggi-do
    19.6
  36. 35Icheon-siGyeonggi-do
    19.6
  37. 37TangjinChungcheongnam-do
    19.5
  38. 37BoryeongChungcheongnam-do
    19.5
  39. 37MasanGwangju
    19.5
  40. 40YesanChungcheongnam-do
    19.3
  41. 40SuwonGyeonggi-do
    19.3
  42. 40OsanGyeonggi-do
    19.3
  43. 43WaegwanGyeongsangbuk-do
    19.2
  44. 43IncheonIncheon
    19.2
  45. 43AnseongGyeonggi-do
    19.2
  46. 46Bucheon-siGyeonggi-do
    19.1
  47. 47PyeongtaekGyeonggi-do
    19.0
  48. 47MokpoJeollanam-do
    19.0
  49. 47Gyeongsan-siGyeongsangbuk-do
    19.0
  50. 47CheonanChungcheongnam-do
    19.0
  51. 47YeongamJeollanam-do
    19.0
  52. 52NamsaJeollabuk-do
    18.8
  53. 52IksanJeollabuk-do
    18.8
  54. 52Hongch’ŏnGangwon-do
    18.8
  55. 52AndongGyeongsangbuk-do
    18.8
  56. 56Uijeongbu-siGyeonggi-do
    18.7
  57. 56Seongnam-siGyeonggi-do
    18.7
  58. 56HanamGyeonggi-do
    18.7
  59. 59GunsanJeollabuk-do
    18.6
  60. 60PohangGyeongsangbuk-do
    18.5
  61. 61YŏnmuChungcheongnam-do
    18.4
  62. 62JeonjuJeollabuk-do
    18.3
  63. 63Anyang-siGyeonggi-do
    18.1
  64. 64GwangjuGwangju
    18.0
  65. 64Ansan-siGyeonggi-do
    18.0
  66. 66NeietsuGangwon-do
    17.9
  67. 66YangjuGyeonggi-do
    17.9
  68. 66WanjuJeollabuk-do
    17.9
  69. 66DaejeonDaejeon
    17.9
  70. 70HwacheonGangwon-do
    17.7
  71. 71TongyeongGyeongsangnam-do
    17.6
  72. 71ChuncheonGangwon-do
    17.6
  73. 73Jinan-gunJeollabuk-do
    17.4
  74. 74Jeju CityJeju-do
    17.3
  75. 75YeonilGyeongsangbuk-do
    17.2
  76. 75NonsanChungcheongnam-do
    17.2
  77. 75Hwaseong-siGyeonggi-do
    17.2
  78. 78NangenJeollabuk-do
    17.1
  79. 79GongjuChungcheongnam-do
    17.0
  80. 80Taesal-liChungcheongnam-do
    16.8
  81. 80DaeguDaegu
    16.8
  82. 80Goyang-siGyeonggi-do
    16.8
  83. 83MiryangGyeongsangnam-do
    16.7
  84. 84HayangGyeongsangbuk-do
    16.6
  85. 84ChinjuGyeongsangnam-do
    16.6
  86. 86YecheonGyeongsangbuk-do
    16.5
  87. 87ImsilJeollabuk-do
    16.4
  88. 88Cheongsong gunGyeongsangbuk-do
    16.3
  89. 88SinhyeonGyeongsangnam-do
    16.3
  90. 90BusanBusan
    16.2
  91. 90KunwiGyeongsangbuk-do
    16.2
  92. 92YangguGangwon-do
    16.1
  93. 92Koch'angJeollabuk-do
    16.1
  94. 94HaenamJeollanam-do
    16.0
  95. 95MungyeongGyeongsangbuk-do
    15.8
  96. 95GoseongGyeongsangnam-do
    15.8
  97. 95ChangsuJeollabuk-do
    15.8
  98. 98EisenGyeongsangbuk-do
    15.7
  99. 98KimhaeGyeongsangnam-do
    15.7
  100. 100GaigeturiJeju-do
    15.6
  101. 100GeojeGyeongsangnam-do
    15.6
  102. 102Donghae CityGangwon-do
    15.5
  103. 103SeosanChungcheongnam-do
    15.4
  104. 103GyeongjuGyeongsangbuk-do
    15.4
  105. 105HwawŏnDaegu
    15.2
  106. 106NaesŏGyeongsangnam-do
    15.0
  107. 107ChangwonGyeongsangnam-do
    14.8
  108. 108UlsanUlsan
    14.7
  109. 109JangseongJeollanam-do
    14.6
  110. 110SinanJeollanam-do
    14.5
  111. 110ChangnyeongGyeongsangnam-do
    14.5
  112. 112SantyokuGangwon-do
    14.4
  113. 112GangneungGangwon-do
    14.4
  114. 114SeogwipoJeju-do
    14.3
  115. 115GijangBusan
    14.2
  116. 116HwasunJeollanam-do
    14.1
  117. 117T’aebaekGangwon-do
    14.0
  118. 118YeosuJeollanam-do
    13.9
  119. 118GwangyangJeollanam-do
    13.9
  120. 120DamyangJeollanam-do
    13.5
  121. 120BuyeoChungcheongnam-do
    13.5
  122. 120KwangyangJeollanam-do
    13.5
  123. 120HadongGyeongsangnam-do
    13.5
  124. 124SuncheonJeollanam-do
    13.4
  125. 124UngsangGyeongsangnam-do
    13.4
  126. 126YangsanGyeongsangnam-do
    13.3
  127. 126BoseongJeollanam-do
    13.3
  128. 128JangheungJeollanam-do
    13.2
  129. 129NajuJeollanam-do
    13.1
  130. 130YeonggwangJeollanam-do
    12.7
  131. 130MuanJeollanam-do
    12.7
  132. 132JumunjinGangwon-do
    12.1
  133. 133SokchoGangwon-do
    10.8
  134. 134BeolgyoJeollanam-do
    10.4
  135. 135KosongGangwon-do
    9.9
Good0–5
Fair6–15
Moderate16–50
Poor51–90
Very poor91–140
Extremely poor141+

The European Environment Agency's air quality index bands for PM2.5 (2024 revision); it has bands, not numbers, so values stay in µg/m³. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, January 2026 · South Korea now

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SmogRank, most polluted cities in South Korea, PM2.5, January 2026, smogrank.com/kr/history/2026-01 (accessed 2 Oct 2026).

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