SmogRank / World / South Korea / October 2025

Most polluted cities in South Korea, October 2025

136 cities in South Korea ranked by their average PM2.5 over the 31 days. Worst: Haenam at 16.4 µg/m³, #318 of 2,296 cities in the world. Cleanest: Sokcho at 3.8. A city needs measurements on 70% of the days to be ranked.

← Haenam 16.4 µg/m³ 20 µg/m³0
Every city in South Korea ranked for October 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. 1HaenamJeollanam-do
    65
  2. 2KimjeJeollabuk-do
    62
  3. 3SeonghwanChungcheongnam-do
    61
  4. 4YesanChungcheongnam-do
    59
  5. 4MokpoJeollanam-do
    59
  6. 6TangjinChungcheongnam-do
    58
  7. 7HongseongChungcheongnam-do
    58
  8. 8NangenJeollabuk-do
    58
  9. 9JeongeupJeollabuk-do
    58
  10. 10AsanChungcheongnam-do
    57
  11. 11BuanJeollabuk-do
    57
  12. 12PyeongtaekGyeonggi-do
    56
  13. 12MasanGwangju
    56
  14. 12PubalGyeonggi-do
    56
  15. 15GunsanJeollabuk-do
    55
  16. 16BoryeongChungcheongnam-do
    55
  17. 16CheonanChungcheongnam-do
    55
  18. 16SinhyeonGyeongsangnam-do
    55
  19. 19DamyangJeollanam-do
    55
  20. 19GumiGyeongsangbuk-do
    55
  21. 21WanjuJeollabuk-do
    55
  22. 21YŏnmuChungcheongnam-do
    55
  23. 23CheorwonGangwon-do
    55
  24. 23Cheongju-siNorth Chungcheong
    55
  25. 25IksanJeollabuk-do
    55
  26. 25JungpyongNorth Chungcheong
    55
  27. 27KoesanNorth Chungcheong
    54
  28. 28Ganghwa-gunIncheon
    54
  29. 28IncheonIncheon
    54
  30. 28TongyeongGyeongsangnam-do
    54
  31. 31Taesal-liChungcheongnam-do
    54
  32. 31NonsanChungcheongnam-do
    54
  33. 31GimcheonGyeongsangbuk-do
    54
  34. 31Icheon-siGyeonggi-do
    54
  35. 31HayangGyeongsangbuk-do
    54
  36. 36AnseongGyeonggi-do
    53
  37. 37YeongjuGyeongsangbuk-do
    53
  38. 37GwangjuGwangju
    53
  39. 37Gimpo-siGyeonggi-do
    53
  40. 37Hwaseong-siGyeonggi-do
    53
  41. 41HwadoGyeonggi-do
    53
  42. 42OkcheonNorth Chungcheong
    53
  43. 42ImsilJeollabuk-do
    53
  44. 42JeonjuJeollabuk-do
    53
  45. 42Chinch'ŏnNorth Chungcheong
    53
  46. 46GoseongGyeongsangnam-do
    52
  47. 47WŏnjuGangwon-do
    52
  48. 47SuwonGyeonggi-do
    52
  49. 47SejongSejong-si
    52
  50. 50PohangGyeongsangbuk-do
    52
  51. 50KinzanChungcheongnam-do
    52
  52. 50Ansan-siGyeonggi-do
    52
  53. 50Donghae CityGangwon-do
    52
  54. 50BoseongJeollanam-do
    52
  55. 55MuanJeollanam-do
    52
  56. 56UlsanUlsan
    52
  57. 56ChangwonGyeongsangnam-do
    52
  58. 56GwangmyeongGyeonggi-do
    52
  59. 59Uijeongbu-siGyeonggi-do
    52
  60. 59SeosanChungcheongnam-do
    52
  61. 59NamsaJeollabuk-do
    52
  62. 59YeongamJeollanam-do
    52
  63. 63Bucheon-siGyeonggi-do
    51
  64. 63Jeju CityJeju-do
    51
  65. 63NaesŏGyeongsangnam-do
    51
  66. 66YeongdongNorth Chungcheong
    51
  67. 66Goyang-siGyeonggi-do
    51
  68. 66ChangnyeongGyeongsangnam-do
    51
  69. 69DaeguDaegu
    51
  70. 70SantyokuGangwon-do
    50
  71. 70BusanBusan
    50
  72. 70ChungjuNorth Chungcheong
    50
  73. 73OsanGyeonggi-do
    49
  74. 73GaigeturiJeju-do
    49
  75. 73HwawŏnDaegu
    49
  76. 76HwasunJeollanam-do
    49
  77. 77SeoulSeoul
    48
  78. 77MunsanGyeonggi-do
    48
  79. 79DaejeonDaejeon
    48
  80. 79BuyeoChungcheongnam-do
    48
  81. 79MiryangGyeongsangnam-do
    48
  82. 82YangsanGyeongsangnam-do
    47
  83. 82YeosuJeollanam-do
    47
  84. 82SinanJeollanam-do
    47
  85. 85Gyeongsan-siGyeongsangbuk-do
    47
  86. 85Koch'angJeollabuk-do
    47
  87. 87Guri-siGyeonggi-do
    46
  88. 87GijangBusan
    46
  89. 89SangjuGyeongsangbuk-do
    46
  90. 89BeolgyoJeollanam-do
    46
  91. 89NajuJeollanam-do
    46
  92. 89KwangyangJeollanam-do
    46
  93. 89KimhaeGyeongsangnam-do
    46
  94. 89ChinjuGyeongsangnam-do
    46
  95. 89Jinan-gunJeollabuk-do
    46
  96. 96YeojuGyeonggi-do
    45
  97. 96GwangjuGyeonggi-do
    45
  98. 96Anyang-siGyeonggi-do
    45
  99. 96AndongGyeongsangbuk-do
    45
  100. 96UngsangGyeongsangnam-do
    45
  101. 101YeonilGyeongsangbuk-do
    44
  102. 101JangheungJeollanam-do
    44
  103. 101HanamGyeonggi-do
    44
  104. 101GeojeGyeongsangnam-do
    44
  105. 105ChangsuJeollabuk-do
    44
  106. 106YeonggwangJeollanam-do
    43
  107. 106WaegwanGyeongsangbuk-do
    43
  108. 106JangseongJeollanam-do
    43
  109. 106SeogwipoJeju-do
    43
  110. 110GongjuChungcheongnam-do
    41
  111. 110GangneungGangwon-do
    41
  112. 110Seongnam-siGyeonggi-do
    41
  113. 110NamyangjuGyeonggi-do
    41
  114. 114SuncheonJeollanam-do
    41
  115. 114KuryeJeollanam-do
    41
  116. 116Yangp'yŏngGyeonggi-do
    40
  117. 116GwangyangJeollanam-do
    40
  118. 118HadongGyeongsangnam-do
    39
  119. 119YangguGangwon-do
    38
  120. 119JumunjinGangwon-do
    38
  121. 121YangjuGyeonggi-do
    37
  122. 122EisenGyeongsangbuk-do
    37
  123. 122T’aebaekGangwon-do
    37
  124. 124YecheonGyeongsangbuk-do
    36
  125. 125NeietsuGangwon-do
    36
  126. 126GyeongjuGyeongsangbuk-do
    35
  127. 126GapyeongGyeonggi-do
    35
  128. 128MungyeongGyeongsangbuk-do
    33
  129. 129KunwiGyeongsangbuk-do
    31
  130. 130HwacheonGangwon-do
    31
  131. 131Hongch’ŏnGangwon-do
    29
  132. 131Cheongsong gunGyeongsangbuk-do
    29
  133. 133ChuncheonGangwon-do
    27
  134. 134KosongGangwon-do
    26
  135. 135WabuGyeonggi-do
    26
  136. 136SokchoGangwon-do
    21
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, October 2025, smogrank.com/kr/history/2025-10 (accessed 2 Oct 2026).

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