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 µg/m³ 20 µg/m³0
Every city in South Korea ranked for January 2026, 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. 1KimjeJeollabuk-do
    37
  2. 2YeongjuGyeongsangbuk-do
    36
  3. 2SeonghwanChungcheongnam-do
    36
  4. 4OkcheonNorth Chungcheong
    35
  5. 5SangjuGyeongsangbuk-do
    35
  6. 6PubalGyeonggi-do
    35
  7. 7KinzanChungcheongnam-do
    34
  8. 8YeongdongNorth Chungcheong
    34
  9. 8WŏnjuGangwon-do
    34
  10. 10HwadoGyeonggi-do
    33
  11. 11AsanChungcheongnam-do
    33
  12. 12Cheongju-siNorth Chungcheong
    32
  13. 13Chinch'ŏnNorth Chungcheong
    32
  14. 14ChungjuNorth Chungcheong
    32
  15. 15KoesanNorth Chungcheong
    31
  16. 16YeojuGyeonggi-do
    31
  17. 17SejongSejong-si
    31
  18. 18GumiGyeongsangbuk-do
    31
  19. 18JungpyongNorth Chungcheong
    31
  20. 20CheorwonGangwon-do
    30
  21. 20WabuGyeonggi-do
    30
  22. 22BuanJeollabuk-do
    30
  23. 22GwangjuGyeonggi-do
    30
  24. 22JeongeupJeollabuk-do
    30
  25. 25GapyeongGyeonggi-do
    30
  26. 26SeoulSeoul
    29
  27. 26Gimpo-siGyeonggi-do
    29
  28. 28HongseongChungcheongnam-do
    29
  29. 29Yangp'yŏngGyeonggi-do
    29
  30. 29GwangmyeongGyeonggi-do
    29
  31. 31Ganghwa-gunIncheon
    29
  32. 32GimcheonGyeongsangbuk-do
    29
  33. 33Guri-siGyeonggi-do
    29
  34. 33NamyangjuGyeonggi-do
    29
  35. 35MunsanGyeonggi-do
    28
  36. 35Icheon-siGyeonggi-do
    28
  37. 37TangjinChungcheongnam-do
    28
  38. 37BoryeongChungcheongnam-do
    28
  39. 37MasanGwangju
    28
  40. 40YesanChungcheongnam-do
    28
  41. 40SuwonGyeonggi-do
    28
  42. 40OsanGyeonggi-do
    28
  43. 43WaegwanGyeongsangbuk-do
    28
  44. 43IncheonIncheon
    28
  45. 43AnseongGyeonggi-do
    28
  46. 46Bucheon-siGyeonggi-do
    28
  47. 47PyeongtaekGyeonggi-do
    28
  48. 47MokpoJeollanam-do
    28
  49. 47Gyeongsan-siGyeongsangbuk-do
    28
  50. 47CheonanChungcheongnam-do
    28
  51. 47YeongamJeollanam-do
    28
  52. 52NamsaJeollabuk-do
    27
  53. 52IksanJeollabuk-do
    27
  54. 52Hongch’ŏnGangwon-do
    27
  55. 52AndongGyeongsangbuk-do
    27
  56. 56Uijeongbu-siGyeonggi-do
    27
  57. 56Seongnam-siGyeonggi-do
    27
  58. 56HanamGyeonggi-do
    27
  59. 59GunsanJeollabuk-do
    27
  60. 60PohangGyeongsangbuk-do
    27
  61. 61YŏnmuChungcheongnam-do
    27
  62. 62JeonjuJeollabuk-do
    27
  63. 63Anyang-siGyeonggi-do
    26
  64. 64GwangjuGwangju
    26
  65. 64Ansan-siGyeonggi-do
    26
  66. 66NeietsuGangwon-do
    26
  67. 66YangjuGyeonggi-do
    26
  68. 66WanjuJeollabuk-do
    26
  69. 66DaejeonDaejeon
    26
  70. 70HwacheonGangwon-do
    26
  71. 71TongyeongGyeongsangnam-do
    26
  72. 71ChuncheonGangwon-do
    26
  73. 73Jinan-gunJeollabuk-do
    25
  74. 74Jeju CityJeju-do
    25
  75. 75YeonilGyeongsangbuk-do
    25
  76. 75NonsanChungcheongnam-do
    25
  77. 75Hwaseong-siGyeonggi-do
    25
  78. 78NangenJeollabuk-do
    25
  79. 79GongjuChungcheongnam-do
    25
  80. 80Taesal-liChungcheongnam-do
    24
  81. 80DaeguDaegu
    24
  82. 80Goyang-siGyeonggi-do
    24
  83. 83MiryangGyeongsangnam-do
    24
  84. 84HayangGyeongsangbuk-do
    24
  85. 84ChinjuGyeongsangnam-do
    24
  86. 86YecheonGyeongsangbuk-do
    24
  87. 87ImsilJeollabuk-do
    24
  88. 88Cheongsong gunGyeongsangbuk-do
    24
  89. 88SinhyeonGyeongsangnam-do
    24
  90. 90BusanBusan
    24
  91. 90KunwiGyeongsangbuk-do
    24
  92. 92YangguGangwon-do
    23
  93. 92Koch'angJeollabuk-do
    23
  94. 94HaenamJeollanam-do
    23
  95. 95MungyeongGyeongsangbuk-do
    23
  96. 95GoseongGyeongsangnam-do
    23
  97. 95ChangsuJeollabuk-do
    23
  98. 98EisenGyeongsangbuk-do
    23
  99. 98KimhaeGyeongsangnam-do
    23
  100. 100GaigeturiJeju-do
    23
  101. 100GeojeGyeongsangnam-do
    23
  102. 102Donghae CityGangwon-do
    23
  103. 103SeosanChungcheongnam-do
    22
  104. 103GyeongjuGyeongsangbuk-do
    22
  105. 105HwawŏnDaegu
    22
  106. 106NaesŏGyeongsangnam-do
    22
  107. 107ChangwonGyeongsangnam-do
    22
  108. 108UlsanUlsan
    21
  109. 109JangseongJeollanam-do
    21
  110. 110SinanJeollanam-do
    21
  111. 110ChangnyeongGyeongsangnam-do
    21
  112. 112SantyokuGangwon-do
    21
  113. 112GangneungGangwon-do
    21
  114. 114SeogwipoJeju-do
    21
  115. 115GijangBusan
    21
  116. 116HwasunJeollanam-do
    21
  117. 117T’aebaekGangwon-do
    20
  118. 118YeosuJeollanam-do
    20
  119. 118GwangyangJeollanam-do
    20
  120. 120DamyangJeollanam-do
    20
  121. 120BuyeoChungcheongnam-do
    20
  122. 120KwangyangJeollanam-do
    20
  123. 120HadongGyeongsangnam-do
    20
  124. 124SuncheonJeollanam-do
    20
  125. 124UngsangGyeongsangnam-do
    20
  126. 126YangsanGyeongsangnam-do
    19
  127. 126BoseongJeollanam-do
    19
  128. 128JangheungJeollanam-do
    19
  129. 129NajuJeollanam-do
    19
  130. 130YeonggwangJeollanam-do
    19
  131. 130MuanJeollanam-do
    19
  132. 132JumunjinGangwon-do
    18
  133. 133SokchoGangwon-do
    16
  134. 134BeolgyoJeollanam-do
    15
  135. 135KosongGangwon-do
    15
Excellent0–50
Good51–100
Lightly polluted101–150
Moderately polluted151–200
Heavily polluted201–300
Severely polluted301+

China's Air Quality Index (HJ 633-2012), PM2.5 individual index. 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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