SmogRank / World / South Korea / April 2025

Most polluted cities in South Korea, April 2025

135 cities in South Korea ranked by their average PM2.5 over the 30 days. Worst: Seonghwan at 26.3 µg/m³, #214 of 2,569 cities in the world. Cleanest: Kosong at 10.7. A city needs measurements on 70% of the days to be ranked.

← Seonghwan 26.3 µg/m³ 20 µg/m³0
Every city in South Korea ranked for April 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. 1SeonghwanChungcheongnam-do
    83
  2. 2GumiGyeongsangbuk-do
    80
  3. 3KinzanChungcheongnam-do
    79
  4. 4PubalGyeonggi-do
    79
  5. 5TangjinChungcheongnam-do
    77
  6. 6YeojuGyeonggi-do
    77
  7. 7AsanChungcheongnam-do
    77
  8. 8OsanGyeonggi-do
    76
  9. 9Ansan-siGyeonggi-do
    75
  10. 10PyeongtaekGyeonggi-do
    75
  11. 10GunsanJeollabuk-do
    75
  12. 10IksanJeollabuk-do
    75
  13. 13Guri-siGyeonggi-do
    75
  14. 14WŏnjuGangwon-do
    74
  15. 14SuwonGyeonggi-do
    74
  16. 16Bucheon-siGyeonggi-do
    74
  17. 16Gimpo-siGyeonggi-do
    74
  18. 16CheorwonGangwon-do
    74
  19. 19SeoulSeoul
    74
  20. 19IncheonIncheon
    74
  21. 21GwangmyeongGyeonggi-do
    74
  22. 22Hwaseong-siGyeonggi-do
    73
  23. 23JungpyongNorth Chungcheong
    73
  24. 23Anyang-siGyeonggi-do
    73
  25. 25Yangp'yŏngGyeonggi-do
    72
  26. 25HongseongChungcheongnam-do
    72
  27. 25YŏnmuChungcheongnam-do
    72
  28. 28YesanChungcheongnam-do
    72
  29. 29BuanJeollabuk-do
    72
  30. 29NonsanChungcheongnam-do
    72
  31. 29Icheon-siGyeonggi-do
    72
  32. 29AnseongGyeonggi-do
    72
  33. 33PohangGyeongsangbuk-do
    71
  34. 34Ganghwa-gunIncheon
    71
  35. 35UlsanUlsan
    71
  36. 35CheonanChungcheongnam-do
    71
  37. 35SejongSejong-si
    71
  38. 38YeongjuGyeongsangbuk-do
    70
  39. 38GwangjuGyeonggi-do
    70
  40. 38Goyang-siGyeonggi-do
    70
  41. 41JeongeupJeollabuk-do
    70
  42. 42WaegwanGyeongsangbuk-do
    70
  43. 43WanjuJeollabuk-do
    69
  44. 43Uijeongbu-siGyeonggi-do
    69
  45. 43NamsaJeollabuk-do
    69
  46. 46ChungjuNorth Chungcheong
    69
  47. 47BoryeongChungcheongnam-do
    69
  48. 47HanamGyeonggi-do
    69
  49. 49MunsanGyeonggi-do
    69
  50. 50YeongdongNorth Chungcheong
    69
  51. 50SantyokuGangwon-do
    69
  52. 50MiryangGyeongsangnam-do
    69
  53. 50KoesanNorth Chungcheong
    69
  54. 50KimjeJeollabuk-do
    69
  55. 50Cheongju-siNorth Chungcheong
    69
  56. 56Chinch'ŏnNorth Chungcheong
    68
  57. 56Seongnam-siGyeonggi-do
    68
  58. 58GimcheonGyeongsangbuk-do
    68
  59. 58HayangGyeongsangbuk-do
    68
  60. 60TongyeongGyeongsangnam-do
    68
  61. 61OkcheonNorth Chungcheong
    67
  62. 61MasanGwangju
    67
  63. 63DaejeonDaejeon
    67
  64. 63NamyangjuGyeonggi-do
    67
  65. 65NajuJeollanam-do
    67
  66. 66SeosanChungcheongnam-do
    67
  67. 66GapyeongGyeonggi-do
    67
  68. 68DaeguDaegu
    67
  69. 69YangjuGyeonggi-do
    66
  70. 70Jeju CityJeju-do
    66
  71. 71Donghae CityGangwon-do
    66
  72. 72YeonilGyeongsangbuk-do
    66
  73. 72SangjuGyeongsangbuk-do
    66
  74. 72Gyeongsan-siGyeongsangbuk-do
    66
  75. 72HwadoGyeonggi-do
    66
  76. 72WabuGyeonggi-do
    66
  77. 77GangneungGangwon-do
    66
  78. 78BuyeoChungcheongnam-do
    65
  79. 78BusanBusan
    65
  80. 78GwangjuGwangju
    65
  81. 81JeonjuJeollabuk-do
    65
  82. 82MokpoJeollanam-do
    65
  83. 82HwawŏnDaegu
    65
  84. 84YecheonGyeongsangbuk-do
    64
  85. 84NangenJeollabuk-do
    64
  86. 84GongjuChungcheongnam-do
    64
  87. 87MungyeongGyeongsangbuk-do
    64
  88. 87ImsilJeollabuk-do
    64
  89. 87ChinjuGyeongsangnam-do
    64
  90. 90GaigeturiJeju-do
    64
  91. 91ChangsuJeollabuk-do
    64
  92. 92GoseongGyeongsangnam-do
    64
  93. 92NaesŏGyeongsangnam-do
    64
  94. 94NeietsuGangwon-do
    63
  95. 94Hongch’ŏnGangwon-do
    63
  96. 94ChuncheonGangwon-do
    63
  97. 97HaenamJeollanam-do
    63
  98. 97AndongGyeongsangbuk-do
    63
  99. 99KimhaeGyeongsangnam-do
    63
  100. 100GijangBusan
    63
  101. 101SeogwipoJeju-do
    63
  102. 102KunwiGyeongsangbuk-do
    63
  103. 102Cheongsong gunGyeongsangbuk-do
    63
  104. 102JangseongJeollanam-do
    63
  105. 105MuanJeollanam-do
    62
  106. 105UngsangGyeongsangnam-do
    62
  107. 107GyeongjuGyeongsangbuk-do
    62
  108. 107JumunjinGangwon-do
    62
  109. 107ChangwonGyeongsangnam-do
    62
  110. 110Jinan-gunJeollabuk-do
    62
  111. 111HwacheonGangwon-do
    62
  112. 111HadongGyeongsangnam-do
    62
  113. 113YeonggwangJeollanam-do
    62
  114. 113GwangyangJeollanam-do
    62
  115. 113ChangnyeongGyeongsangnam-do
    62
  116. 116YangsanGyeongsangnam-do
    61
  117. 117YangguGangwon-do
    61
  118. 118GeojeGyeongsangnam-do
    61
  119. 119KwangyangJeollanam-do
    61
  120. 120SokchoGangwon-do
    61
  121. 120SinhyeonGyeongsangnam-do
    61
  122. 120YeongamJeollanam-do
    61
  123. 123BoseongJeollanam-do
    60
  124. 124DamyangJeollanam-do
    60
  125. 125YeosuJeollanam-do
    59
  126. 125SinanJeollanam-do
    59
  127. 127EisenGyeongsangbuk-do
    59
  128. 128HwasunJeollanam-do
    59
  129. 129Taesal-liChungcheongnam-do
    58
  130. 129JangheungJeollanam-do
    58
  131. 131Koch'angJeollabuk-do
    58
  132. 132SuncheonJeollanam-do
    57
  133. 133BeolgyoJeollanam-do
    56
  134. 133KuryeJeollanam-do
    56
  135. 135KosongGangwon-do
    54
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, April 2025, smogrank.com/kr/history/2025-04 (accessed 2 Oct 2026).

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