SmogRank / World / Asia / South Korea / Gangwon-do

Most polluted cities in Gangwon-do, South Korea

14 measured cities, last 30 days; 14 above the WHO 24-hour guideline. Worst: Kosong at 171.4 µg/m³, #8 in the world.

Seoul: 1 measured cityIncheon: 2 measured citiesGyeonggi-do: 25 measured citiesGyeongsangbuk-do: 16 measured citiesChungcheongnam-do: 13 measured citiesDaejeon: 1 measured cityGangwon-do: 14 measured citiesNorth Chungcheong: 7 measured cities#14 Hongch’ŏn: 36.4 µg/m³#13 Wŏnju: 36.9 µg/m³#12 Santyoku: 43.7 µg/m³#11 Sokcho: 51.2 µg/m³#10 T’aebaek: 61.3 µg/m³#9 Neietsu: 62.9 µg/m³#8 Hwacheon: 63.7 µg/m³#7 Jumunjin: 64.0 µg/m³#6 Donghae City: 66.9 µg/m³#5 Chuncheon: 69.0 µg/m³#4 Yanggu: 75.4 µg/m³#3 Gangneung: 99.0 µg/m³#2 Cheorwon: 124.1 µg/m³#1 Kosong: 171.4 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Kosong 171.4 µg/m³ 150 µg/m³15 WHO 24-hour guideline
Every measured city in Gangwon-do, South Korea, 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. 1Kosong 246
  2. 2Cheorwon 199
  3. 3Gangneung 181
  4. 4Yanggu 165
  5. 5Chuncheon 160
  6. 6Donghae City 159
  7. 7Jumunjin 157
  8. 8Hwacheon 157
  9. 9Neietsu 156
  10. 10T’aebaek 155
  11. 11Sokcho 140
  12. 12Santyoku 121
  13. 13Wŏnju 104
  14. 14Hongch’ŏn 103
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 Gangwon-do, South Korea, PM2.5, last 30 days to 2 Oct 2026, 08:00 UTC, smogrank.com/kr/region/gangwon-do?w=30d.

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Updated 2026-10-02 08:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.