SmogRank / World / South Korea / April 2026

Most polluted cities in South Korea, April 2026

136 cities in South Korea ranked by their average PM2.5 over the 30 days. Worst: Hwawŏn at 56.4 µg/m³, #54 of 2,573 cities in the world. Cleanest: Kosong at 8.5. A city needs measurements on 70% of the days to be ranked.

← Hwawŏn 56.4 µg/m³ 50 µg/m³0
Every city in South Korea ranked for April 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. 1HwawŏnDaegu
    152
  2. 2ChungjuNorth Chungcheong
    138
  3. 3KunwiGyeongsangbuk-do
    116
  4. 4Ganghwa-gunIncheon
    112
  5. 5KimjeJeollabuk-do
    106
  6. 6IksanJeollabuk-do
    104
  7. 7HongseongChungcheongnam-do
    99
  8. 8NamsaJeollabuk-do
    98
  9. 9SeogwipoJeju-do
    95
  10. 10WabuGyeonggi-do
    93
  11. 11CheorwonGangwon-do
    93
  12. 12TangjinChungcheongnam-do
    93
  13. 13MiryangGyeongsangnam-do
    88
  14. 14TongyeongGyeongsangnam-do
    88
  15. 15SeonghwanChungcheongnam-do
    83
  16. 16Taesal-liChungcheongnam-do
    81
  17. 17BuanJeollabuk-do
    80
  18. 18GunsanJeollabuk-do
    79
  19. 19WanjuJeollabuk-do
    79
  20. 20PyeongtaekGyeonggi-do
    77
  21. 21Yangp'yŏngGyeonggi-do
    77
  22. 22Hwaseong-siGyeonggi-do
    77
  23. 22PubalGyeonggi-do
    77
  24. 24YesanChungcheongnam-do
    76
  25. 24AsanChungcheongnam-do
    76
  26. 24IncheonIncheon
    76
  27. 24YŏnmuChungcheongnam-do
    76
  28. 28Ansan-siGyeonggi-do
    75
  29. 29Gimpo-siGyeonggi-do
    75
  30. 30Bucheon-siGyeonggi-do
    75
  31. 30HwadoGyeonggi-do
    75
  32. 32OsanGyeonggi-do
    74
  33. 33SuwonGyeonggi-do
    73
  34. 33Anyang-siGyeonggi-do
    73
  35. 35JeongeupJeollabuk-do
    73
  36. 36SeoulSeoul
    73
  37. 36Goyang-siGyeonggi-do
    73
  38. 36SinhyeonGyeongsangnam-do
    73
  39. 36GwangmyeongGyeonggi-do
    73
  40. 40CheonanChungcheongnam-do
    72
  41. 41AnseongGyeonggi-do
    72
  42. 42MasanGwangju
    72
  43. 43YeojuGyeonggi-do
    71
  44. 44Guri-siGyeonggi-do
    70
  45. 45SangjuGyeongsangbuk-do
    70
  46. 46Icheon-siGyeonggi-do
    69
  47. 47MunsanGyeonggi-do
    69
  48. 48Koch'angJeollabuk-do
    68
  49. 48HaenamJeollanam-do
    68
  50. 50NonsanChungcheongnam-do
    68
  51. 50MokpoJeollanam-do
    68
  52. 50Seongnam-siGyeonggi-do
    68
  53. 53Chinch'ŏnNorth Chungcheong
    68
  54. 53SejongSejong-si
    68
  55. 55BoryeongChungcheongnam-do
    68
  56. 56NangenJeollabuk-do
    67
  57. 56GwangjuGyeonggi-do
    67
  58. 56GwangjuGwangju
    67
  59. 56JeonjuJeollabuk-do
    67
  60. 60YeongjuGyeongsangbuk-do
    67
  61. 60NajuJeollanam-do
    67
  62. 60HanamGyeonggi-do
    67
  63. 60SinanJeollanam-do
    67
  64. 64Uijeongbu-siGyeonggi-do
    67
  65. 65SeosanChungcheongnam-do
    66
  66. 66YeongamJeollanam-do
    66
  67. 67JangheungJeollanam-do
    65
  68. 68HadongGyeongsangnam-do
    65
  69. 69KoesanNorth Chungcheong
    65
  70. 70YeonggwangJeollanam-do
    64
  71. 70KinzanChungcheongnam-do
    64
  72. 72WŏnjuGangwon-do
    64
  73. 72PohangGyeongsangbuk-do
    64
  74. 74NamyangjuGyeonggi-do
    64
  75. 75DaejeonDaejeon
    64
  76. 76GimcheonGyeongsangbuk-do
    63
  77. 77DamyangJeollanam-do
    63
  78. 77Cheongju-siNorth Chungcheong
    63
  79. 77GaigeturiJeju-do
    63
  80. 80UlsanUlsan
    63
  81. 81BusanBusan
    63
  82. 82WaegwanGyeongsangbuk-do
    63
  83. 82GumiGyeongsangbuk-do
    63
  84. 82Donghae CityGangwon-do
    63
  85. 85SantyokuGangwon-do
    62
  86. 85GongjuChungcheongnam-do
    62
  87. 85Jeju CityJeju-do
    62
  88. 88HayangGyeongsangbuk-do
    62
  89. 89YeonilGyeongsangbuk-do
    62
  90. 89YangsanGyeongsangnam-do
    62
  91. 91Gyeongsan-siGyeongsangbuk-do
    62
  92. 92AndongGyeongsangbuk-do
    61
  93. 93YangjuGyeonggi-do
    61
  94. 93OkcheonNorth Chungcheong
    61
  95. 93GapyeongGyeonggi-do
    61
  96. 96DaeguDaegu
    61
  97. 96ChinjuGyeongsangnam-do
    61
  98. 98GijangBusan
    61
  99. 99KimhaeGyeongsangnam-do
    61
  100. 100MuanJeollanam-do
    61
  101. 100JangseongJeollanam-do
    61
  102. 102BuyeoChungcheongnam-do
    60
  103. 103GoseongGyeongsangnam-do
    60
  104. 104NaesŏGyeongsangnam-do
    60
  105. 104GeojeGyeongsangnam-do
    60
  106. 106Jinan-gunJeollabuk-do
    60
  107. 106ChangwonGyeongsangnam-do
    60
  108. 108SokchoGangwon-do
    60
  109. 108JungpyongNorth Chungcheong
    60
  110. 110EisenGyeongsangbuk-do
    59
  111. 110HwasunJeollanam-do
    59
  112. 112YeongdongNorth Chungcheong
    59
  113. 112ImsilJeollabuk-do
    59
  114. 114KwangyangJeollanam-do
    58
  115. 114YeosuJeollanam-do
    58
  116. 114GwangyangJeollanam-do
    58
  117. 114UngsangGyeongsangnam-do
    58
  118. 118ChangsuJeollabuk-do
    58
  119. 119MungyeongGyeongsangbuk-do
    58
  120. 120NeietsuGangwon-do
    58
  121. 120ChuncheonGangwon-do
    58
  122. 122SuncheonJeollanam-do
    58
  123. 122GyeongjuGyeongsangbuk-do
    58
  124. 122BoseongJeollanam-do
    58
  125. 125YecheonGyeongsangbuk-do
    57
  126. 125KuryeJeollanam-do
    57
  127. 125JumunjinGangwon-do
    57
  128. 128Hongch’ŏnGangwon-do
    57
  129. 129ChangnyeongGyeongsangnam-do
    57
  130. 130BeolgyoJeollanam-do
    56
  131. 131YangguGangwon-do
    56
  132. 132HwacheonGangwon-do
    54
  133. 133Cheongsong gunGyeongsangbuk-do
    54
  134. 134GangneungGangwon-do
    53
  135. 135T’aebaekGangwon-do
    53
  136. 136KosongGangwon-do
    47
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

All cities in the world, April 2026 · South Korea now

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SmogRank, most polluted cities in South Korea, PM2.5, April 2026, smogrank.com/kr/history/2026-04 (accessed 2 Oct 2026).

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