SmogRank / World / South Korea / December 2025

Most polluted cities in South Korea, December 2025

135 cities in South Korea ranked by their average PM2.5 over the 31 days. Worst: Muan at 187.5 µg/m³, #15 of 2,638 cities in the world. Cleanest: Jeju City at 13.0. A city needs measurements on 70% of the days to be ranked.

← Muan 187.5 µg/m³ 150 µg/m³0
Every city in South Korea ranked for December 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. 1MuanJeollanam-do
    262
  2. 2Taesal-liChungcheongnam-do
    233
  3. 3T’aebaekGangwon-do
    210
  4. 4WabuGyeonggi-do
    206
  5. 5HadongGyeongsangnam-do
    187
  6. 6BuyeoChungcheongnam-do
    186
  7. 7WŏnjuGangwon-do
    184
  8. 8AsanChungcheongnam-do
    184
  9. 9Yangp'yŏngGyeonggi-do
    182
  10. 10HwasunJeollanam-do
    181
  11. 11JumunjinGangwon-do
    181
  12. 12KosongGangwon-do
    179
  13. 13PubalGyeonggi-do
    178
  14. 14Cheongju-siNorth Chungcheong
    176
  15. 15SokchoGangwon-do
    176
  16. 16GongjuChungcheongnam-do
    176
  17. 17BoryeongChungcheongnam-do
    172
  18. 18YesanChungcheongnam-do
    169
  19. 19YeonggwangJeollanam-do
    168
  20. 19YeongdongNorth Chungcheong
    168
  21. 21SinhyeonGyeongsangnam-do
    166
  22. 22SeosanChungcheongnam-do
    165
  23. 23UngsangGyeongsangnam-do
    164
  24. 24HongseongChungcheongnam-do
    164
  25. 25Ganghwa-gunIncheon
    164
  26. 26ChuncheonGangwon-do
    163
  27. 27Cheongsong gunGyeongsangbuk-do
    162
  28. 28GeojeGyeongsangnam-do
    161
  29. 29YeojuGyeonggi-do
    161
  30. 30Icheon-siGyeonggi-do
    160
  31. 31HwacheonGangwon-do
    160
  32. 32GwangyangJeollanam-do
    160
  33. 33JangseongJeollanam-do
    160
  34. 34MasanGwangju
    158
  35. 35ChangsuJeollabuk-do
    157
  36. 36KinzanChungcheongnam-do
    157
  37. 37JungpyongNorth Chungcheong
    156
  38. 38AndongGyeongsangbuk-do
    154
  39. 39SeonghwanChungcheongnam-do
    154
  40. 40YangjuGyeonggi-do
    154
  41. 41ChinjuGyeongsangnam-do
    152
  42. 42KunwiGyeongsangbuk-do
    152
  43. 43SantyokuGangwon-do
    150
  44. 44NamyangjuGyeonggi-do
    149
  45. 45SejongSejong-si
    148
  46. 46BoseongJeollanam-do
    147
  47. 47NajuJeollanam-do
    145
  48. 47JangheungJeollanam-do
    145
  49. 49TangjinChungcheongnam-do
    145
  50. 50BeolgyoJeollanam-do
    140
  51. 51NonsanChungcheongnam-do
    139
  52. 52KimjeJeollabuk-do
    138
  53. 53ChungjuNorth Chungcheong
    136
  54. 54NangenJeollabuk-do
    131
  55. 54AnseongGyeonggi-do
    131
  56. 56YŏnmuChungcheongnam-do
    131
  57. 57MokpoJeollanam-do
    130
  58. 58GapyeongGyeonggi-do
    129
  59. 59JeongeupJeollabuk-do
    127
  60. 60OsanGyeonggi-do
    127
  61. 61GwangmyeongGyeonggi-do
    127
  62. 62GaigeturiJeju-do
    126
  63. 63Hongch’ŏnGangwon-do
    125
  64. 63SeogwipoJeju-do
    125
  65. 65MiryangGyeongsangnam-do
    125
  66. 66Hwaseong-siGyeonggi-do
    124
  67. 67NeietsuGangwon-do
    123
  68. 68TongyeongGyeongsangnam-do
    123
  69. 69HwawŏnDaegu
    121
  70. 70GoseongGyeongsangnam-do
    120
  71. 71ChangnyeongGyeongsangnam-do
    119
  72. 72OkcheonNorth Chungcheong
    117
  73. 73Koch'angJeollabuk-do
    116
  74. 74DamyangJeollanam-do
    115
  75. 75GwangjuGyeonggi-do
    115
  76. 76PyeongtaekGyeonggi-do
    112
  77. 76KoesanNorth Chungcheong
    112
  78. 78SinanJeollanam-do
    108
  79. 79HanamGyeonggi-do
    107
  80. 79HwadoGyeonggi-do
    107
  81. 81SangjuGyeongsangbuk-do
    106
  82. 82ImsilJeollabuk-do
    102
  83. 83NaesŏGyeongsangnam-do
    102
  84. 84YangsanGyeongsangnam-do
    99
  85. 85KwangyangJeollanam-do
    99
  86. 86GangneungGangwon-do
    97
  87. 87WaegwanGyeongsangbuk-do
    95
  88. 88YeongjuGyeongsangbuk-do
    93
  89. 88Ansan-siGyeonggi-do
    93
  90. 90MungyeongGyeongsangbuk-do
    91
  91. 91NamsaJeollabuk-do
    91
  92. 92WanjuJeollabuk-do
    91
  93. 93Chinch'ŏnNorth Chungcheong
    88
  94. 94UlsanUlsan
    88
  95. 94HaenamJeollanam-do
    88
  96. 96YangguGangwon-do
    87
  97. 97Donghae CityGangwon-do
    87
  98. 98GumiGyeongsangbuk-do
    78
  99. 99CheorwonGangwon-do
    77
  100. 100Gyeongsan-siGyeongsangbuk-do
    74
  101. 100HayangGyeongsangbuk-do
    74
  102. 102GimcheonGyeongsangbuk-do
    73
  103. 103Gimpo-siGyeonggi-do
    72
  104. 104SuwonGyeonggi-do
    71
  105. 105DaeguDaegu
    71
  106. 106Uijeongbu-siGyeonggi-do
    70
  107. 106BuanJeollabuk-do
    70
  108. 108GunsanJeollabuk-do
    70
  109. 108IksanJeollabuk-do
    70
  110. 110SeoulSeoul
    70
  111. 110MunsanGyeonggi-do
    70
  112. 112PohangGyeongsangbuk-do
    69
  113. 113YeonilGyeongsangbuk-do
    69
  114. 113EisenGyeongsangbuk-do
    69
  115. 113Bucheon-siGyeonggi-do
    69
  116. 116CheonanChungcheongnam-do
    69
  117. 117Guri-siGyeonggi-do
    69
  118. 118IncheonIncheon
    68
  119. 118Seongnam-siGyeonggi-do
    68
  120. 120Goyang-siGyeonggi-do
    68
  121. 121BusanBusan
    67
  122. 121KimhaeGyeongsangnam-do
    67
  123. 121Anyang-siGyeonggi-do
    67
  124. 124YecheonGyeongsangbuk-do
    67
  125. 125DaejeonDaejeon
    66
  126. 126JeonjuJeollabuk-do
    66
  127. 127GwangjuGwangju
    64
  128. 127ChangwonGyeongsangnam-do
    64
  129. 129GyeongjuGyeongsangbuk-do
    64
  130. 130Jinan-gunJeollabuk-do
    63
  131. 131GijangBusan
    63
  132. 132SuncheonJeollanam-do
    62
  133. 133YeongamJeollanam-do
    61
  134. 134YeosuJeollanam-do
    60
  135. 135Jeju CityJeju-do
    58
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 in South Korea, PM2.5, December 2025, smogrank.com/kr/history/2025-12 (accessed 2 Oct 2026).

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