SmogRank / World / South Korea / October 2026

Most polluted cities in South Korea, October 2026

133 cities in South Korea ranked by their average PM2.5 so far (1 of 31 days). Worst: Yangsan at 15.9 µg/m³, #184 of 1,630 cities in the world. Cleanest: Hwaseong-si at 2.6. A city needs measurements on 70% of the days to be ranked.

← Yangsan 15.9 µg/m³ 20 µg/m³0
Every city in South Korea ranked for October 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. 1YangsanGyeongsangnam-do
    64
  2. 2BusanBusan
    63
  3. 3GijangBusan
    62
  4. 4SinhyeonGyeongsangnam-do
    62
  5. 5MokpoJeollanam-do
    61
  6. 6UngsangGyeongsangnam-do
    61
  7. 7GeojeGyeongsangnam-do
    60
  8. 8UlsanUlsan
    59
  9. 9KimhaeGyeongsangnam-do
    59
  10. 10Donghae CityGangwon-do
    58
  11. 11PohangGyeongsangbuk-do
    58
  12. 12EisenGyeongsangbuk-do
    57
  13. 13TongyeongGyeongsangnam-do
    57
  14. 14WaegwanGyeongsangbuk-do
    57
  15. 14NangenJeollabuk-do
    57
  16. 16GumiGyeongsangbuk-do
    56
  17. 17SuncheonJeollanam-do
    56
  18. 18ChangwonGyeongsangnam-do
    56
  19. 19SangjuGyeongsangbuk-do
    55
  20. 19KimjeJeollabuk-do
    55
  21. 21YeongjuGyeongsangbuk-do
    55
  22. 21YeonggwangJeollanam-do
    55
  23. 21MiryangGyeongsangnam-do
    55
  24. 21HayangGyeongsangbuk-do
    55
  25. 21HadongGyeongsangnam-do
    55
  26. 26NajuJeollanam-do
    55
  27. 27GangneungGangwon-do
    54
  28. 27ChangnyeongGyeongsangnam-do
    54
  29. 29Gyeongsan-siGyeongsangbuk-do
    54
  30. 30WanjuJeollabuk-do
    54
  31. 30DaeguDaegu
    54
  32. 30HaenamJeollanam-do
    54
  33. 33YeonilGyeongsangbuk-do
    54
  34. 34OkcheonNorth Chungcheong
    53
  35. 35GoseongGyeongsangnam-do
    53
  36. 35AndongGyeongsangbuk-do
    53
  37. 35NaesŏGyeongsangnam-do
    53
  38. 38KuryeJeollanam-do
    53
  39. 39HwawŏnDaegu
    53
  40. 40YeojuGyeonggi-do
    52
  41. 40SantyokuGangwon-do
    52
  42. 42GwangyangJeollanam-do
    52
  43. 43NonsanChungcheongnam-do
    52
  44. 44KoesanNorth Chungcheong
    52
  45. 44CheorwonGangwon-do
    52
  46. 44ChinjuGyeongsangnam-do
    52
  47. 47NamsaJeollabuk-do
    51
  48. 47GyeongjuGyeongsangbuk-do
    51
  49. 47GimcheonGyeongsangbuk-do
    51
  50. 47Cheongsong gunGyeongsangbuk-do
    51
  51. 47YeongamJeollanam-do
    51
  52. 52MasanGwangju
    51
  53. 52SinanJeollanam-do
    51
  54. 54WŏnjuGangwon-do
    50
  55. 54T’aebaekGangwon-do
    50
  56. 54MungyeongGyeongsangbuk-do
    50
  57. 54SeogwipoJeju-do
    50
  58. 58KwangyangJeollanam-do
    49
  59. 58GwangjuGwangju
    49
  60. 58JumunjinGangwon-do
    49
  61. 58YeosuJeollanam-do
    49
  62. 62ChungjuNorth Chungcheong
    48
  63. 63NeietsuGangwon-do
    48
  64. 63BuanJeollabuk-do
    48
  65. 65MuanJeollanam-do
    47
  66. 65IksanJeollabuk-do
    47
  67. 65YŏnmuChungcheongnam-do
    47
  68. 68YecheonGyeongsangbuk-do
    47
  69. 69GunsanJeollabuk-do
    46
  70. 69HwasunJeollanam-do
    46
  71. 71TangjinChungcheongnam-do
    46
  72. 71SeonghwanChungcheongnam-do
    46
  73. 71BoseongJeollanam-do
    46
  74. 71JeongeupJeollabuk-do
    46
  75. 75SokchoGangwon-do
    45
  76. 75KunwiGyeongsangbuk-do
    45
  77. 75Cheongju-siNorth Chungcheong
    45
  78. 78JangheungJeollanam-do
    44
  79. 78PubalGyeonggi-do
    44
  80. 80Chinch'ŏnNorth Chungcheong
    44
  81. 81Gimpo-siGyeonggi-do
    43
  82. 82YeongdongNorth Chungcheong
    43
  83. 83JeonjuJeollabuk-do
    42
  84. 83ChangsuJeollabuk-do
    42
  85. 85ImsilJeollabuk-do
    41
  86. 85JungpyongNorth Chungcheong
    41
  87. 85Jinan-gunJeollabuk-do
    41
  88. 85Jeju CityJeju-do
    41
  89. 89Guri-siGyeonggi-do
    40
  90. 90DaejeonDaejeon
    39
  91. 90CheonanChungcheongnam-do
    39
  92. 92WabuGyeonggi-do
    38
  93. 93MunsanGyeonggi-do
    37
  94. 93Ganghwa-gunIncheon
    37
  95. 93Icheon-siGyeonggi-do
    37
  96. 96BoryeongChungcheongnam-do
    37
  97. 96BuyeoChungcheongnam-do
    37
  98. 98AsanChungcheongnam-do
    36
  99. 99GaigeturiJeju-do
    36
  100. 100SeoulSeoul
    35
  101. 100HanamGyeonggi-do
    35
  102. 102Uijeongbu-siGyeonggi-do
    34
  103. 103Anyang-siGyeonggi-do
    34
  104. 103GwangmyeongGyeonggi-do
    34
  105. 105GongjuChungcheongnam-do
    33
  106. 105Koch'angJeollabuk-do
    33
  107. 105IncheonIncheon
    33
  108. 108YesanChungcheongnam-do
    32
  109. 108HongseongChungcheongnam-do
    32
  110. 110Goyang-siGyeonggi-do
    31
  111. 111JangseongJeollanam-do
    31
  112. 111NamyangjuGyeonggi-do
    31
  113. 111SejongSejong-si
    31
  114. 114PyeongtaekGyeonggi-do
    29
  115. 115Taesal-liChungcheongnam-do
    28
  116. 115HwadoGyeonggi-do
    28
  117. 117KinzanChungcheongnam-do
    28
  118. 118Bucheon-siGyeonggi-do
    27
  119. 118Hongch’ŏnGangwon-do
    27
  120. 118ChuncheonGangwon-do
    27
  121. 118Ansan-siGyeonggi-do
    27
  122. 122SuwonGyeonggi-do
    26
  123. 122OsanGyeonggi-do
    26
  124. 124KosongGangwon-do
    24
  125. 125Yangp'yŏngGyeonggi-do
    24
  126. 125HwacheonGangwon-do
    24
  127. 127SeosanChungcheongnam-do
    23
  128. 127GwangjuGyeonggi-do
    23
  129. 129YangguGangwon-do
    22
  130. 130Seongnam-siGyeonggi-do
    20
  131. 131YangjuGyeonggi-do
    17
  132. 132AnseongGyeonggi-do
    16
  133. 133Hwaseong-siGyeonggi-do
    14
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 2026 (so far), smogrank.com/kr/history/2026-10 (accessed 2 Oct 2026).

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