SmogRank / World / South Korea / September 2026

Most polluted cities in South Korea, September 2026

132 cities in South Korea ranked by their average PM2.5 over the 30 days. Worst: Miryang at 322.6 µg/m³, #1 of 2,646 cities in the world. Cleanest: Daegu at 8.7. A city needs measurements on 70% of the days to be ranked.

← Miryang 322.6 µg/m³ 300 µg/m³0
Every city in South Korea ranked for September 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. 1MiryangGyeongsangnam-do
    494
  2. 2HwasunJeollanam-do
    425
  3. 3SeosanChungcheongnam-do
    382
  4. 4NangenJeollabuk-do
    375
  5. 5SeogwipoJeju-do
    278
  6. 6GaigeturiJeju-do
    277
  7. 7KosongGangwon-do
    274
  8. 8Hwaseong-siGyeonggi-do
    264
  9. 9SinhyeonGyeongsangnam-do
    260
  10. 10AnseongGyeonggi-do
    255
  11. 11Taesal-liChungcheongnam-do
    252
  12. 12KimjeJeollabuk-do
    230
  13. 13TangjinChungcheongnam-do
    219
  14. 14NonsanChungcheongnam-do
    211
  15. 15ChangsuJeollabuk-do
    204
  16. 16MokpoJeollanam-do
    202
  17. 17ChinjuGyeongsangnam-do
    202
  18. 18JeongeupJeollabuk-do
    201
  19. 19HadongGyeongsangnam-do
    200
  20. 20Yangp'yŏngGyeonggi-do
    200
  21. 21YangjuGyeonggi-do
    199
  22. 22BuanJeollabuk-do
    199
  23. 23CheorwonGangwon-do
    199
  24. 24GoseongGyeongsangnam-do
    199
  25. 25KunwiGyeongsangbuk-do
    198
  26. 26ChangnyeongGyeongsangnam-do
    197
  27. 27GongjuChungcheongnam-do
    196
  28. 28HongseongChungcheongnam-do
    194
  29. 29PubalGyeonggi-do
    192
  30. 30GeojeGyeongsangnam-do
    192
  31. 31GwangjuGyeonggi-do
    191
  32. 32SeonghwanChungcheongnam-do
    191
  33. 33YesanChungcheongnam-do
    190
  34. 34YeojuGyeonggi-do
    189
  35. 35YŏnmuChungcheongnam-do
    188
  36. 36NamsaJeollabuk-do
    188
  37. 37YangsanGyeongsangnam-do
    187
  38. 38BuyeoChungcheongnam-do
    187
  39. 39HwawŏnDaegu
    186
  40. 40GunsanJeollabuk-do
    184
  41. 41GangneungGangwon-do
    181
  42. 42NamyangjuGyeonggi-do
    181
  43. 43Cheongju-siNorth Chungcheong
    180
  44. 44YeonggwangJeollanam-do
    179
  45. 45YecheonGyeongsangbuk-do
    179
  46. 46JungpyongNorth Chungcheong
    179
  47. 47Ganghwa-gunIncheon
    179
  48. 48MasanGwangju
    179
  49. 48KoesanNorth Chungcheong
    179
  50. 50YeongdongNorth Chungcheong
    179
  51. 50BoryeongChungcheongnam-do
    179
  52. 52AsanChungcheongnam-do
    178
  53. 53Jeju CityJeju-do
    176
  54. 53JangheungJeollanam-do
    176
  55. 55Koch'angJeollabuk-do
    176
  56. 56Icheon-siGyeonggi-do
    175
  57. 57MuanJeollanam-do
    175
  58. 58HaenamJeollanam-do
    171
  59. 59Jinan-gunJeollabuk-do
    170
  60. 60IksanJeollabuk-do
    169
  61. 61HayangGyeongsangbuk-do
    169
  62. 62JeonjuJeollabuk-do
    168
  63. 63BoseongJeollanam-do
    168
  64. 64SejongSejong-si
    167
  65. 65YangguGangwon-do
    165
  66. 66ImsilJeollabuk-do
    163
  67. 67NajuJeollanam-do
    161
  68. 68OkcheonNorth Chungcheong
    161
  69. 69ChuncheonGangwon-do
    160
  70. 70SinanJeollanam-do
    160
  71. 71TongyeongGyeongsangnam-do
    159
  72. 72Donghae CityGangwon-do
    159
  73. 73KuryeJeollanam-do
    159
  74. 74EisenGyeongsangbuk-do
    158
  75. 74JumunjinGangwon-do
    158
  76. 76WabuGyeonggi-do
    157
  77. 77HwacheonGangwon-do
    157
  78. 78NeietsuGangwon-do
    156
  79. 79T’aebaekGangwon-do
    155
  80. 80MunsanGyeonggi-do
    153
  81. 81WanjuJeollabuk-do
    153
  82. 82WŏnjuGangwon-do
    152
  83. 83UngsangGyeongsangnam-do
    152
  84. 84WaegwanGyeongsangbuk-do
    145
  85. 85GwangmyeongGyeonggi-do
    144
  86. 86Anyang-siGyeonggi-do
    142
  87. 87YeongamJeollanam-do
    142
  88. 88AndongGyeongsangbuk-do
    142
  89. 89HwadoGyeonggi-do
    141
  90. 90NaesŏGyeongsangnam-do
    140
  91. 91BusanBusan
    139
  92. 91HanamGyeonggi-do
    139
  93. 93SokchoGangwon-do
    139
  94. 94Cheongsong gunGyeongsangbuk-do
    137
  95. 95JangseongJeollanam-do
    137
  96. 96GijangBusan
    136
  97. 97Goyang-siGyeonggi-do
    126
  98. 98GimcheonGyeongsangbuk-do
    122
  99. 99SantyokuGangwon-do
    121
  100. 99GwangyangJeollanam-do
    121
  101. 101Seongnam-siGyeonggi-do
    120
  102. 102MungyeongGyeongsangbuk-do
    116
  103. 103GyeongjuGyeongsangbuk-do
    114
  104. 104PyeongtaekGyeonggi-do
    111
  105. 105SuncheonJeollanam-do
    109
  106. 105CheonanChungcheongnam-do
    109
  107. 107Ansan-siGyeonggi-do
    109
  108. 108SangjuGyeongsangbuk-do
    109
  109. 109Uijeongbu-siGyeonggi-do
    106
  110. 110YeongjuGyeongsangbuk-do
    103
  111. 111Hongch’ŏnGangwon-do
    103
  112. 112GumiGyeongsangbuk-do
    94
  113. 113YeosuJeollanam-do
    91
  114. 114Gimpo-siGyeonggi-do
    85
  115. 115IncheonIncheon
    82
  116. 116Chinch'ŏnNorth Chungcheong
    82
  117. 117Guri-siGyeonggi-do
    80
  118. 118GwangjuGwangju
    80
  119. 119SeoulSeoul
    80
  120. 120OsanGyeonggi-do
    80
  121. 120KwangyangJeollanam-do
    80
  122. 122SuwonGyeonggi-do
    79
  123. 122ChungjuNorth Chungcheong
    79
  124. 124Bucheon-siGyeonggi-do
    79
  125. 124ChangwonGyeongsangnam-do
    79
  126. 126PohangGyeongsangbuk-do
    79
  127. 127UlsanUlsan
    78
  128. 128DaejeonDaejeon
    77
  129. 129YeonilGyeongsangbuk-do
    77
  130. 130KimhaeGyeongsangnam-do
    76
  131. 131Gyeongsan-siGyeongsangbuk-do
    49
  132. 132DaeguDaegu
    48
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, September 2026, smogrank.com/kr/history/2026-09 (accessed 2 Oct 2026).

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