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

Most polluted cities in Gangwon-do, South Korea

14 measured cities, last 7 days; 0 above the WHO 24-hour guideline. Worst: Cheorwon at 12.9 µg/m³, #435 in the world.

Seoul: 1 measured cityIncheon: 2 measured citiesGyeonggi-do: 26 measured citiesGyeongsangbuk-do: 16 measured citiesChungcheongnam-do: 14 measured citiesDaejeon: 1 measured cityGangwon-do: 14 measured citiesNorth Chungcheong: 7 measured cities#14 Kosong: 5.1 µg/m³#13 Hwacheon: 6.5 µg/m³#11 Yanggu: 6.9 µg/m³#12 T’aebaek: 6.9 µg/m³#10 Chuncheon: 7.1 µg/m³#9 Jumunjin: 7.4 µg/m³#8 Neietsu: 8.1 µg/m³#7 Hongch’ŏn: 8.3 µg/m³#6 Gangneung: 9.9 µg/m³#5 Santyoku: 10.2 µg/m³#4 Sokcho: 10.8 µg/m³#3 Wŏnju: 10.9 µg/m³#2 Donghae City: 12.3 µg/m³#1 Cheorwon: 12.9 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Cheorwon 12.9 µg/m³ 15 µg/m³ WHO 24-hour guideline0
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. 1Cheorwon 58
  2. 2Donghae City 57
  3. 3Wŏnju 54
  4. 4Sokcho 54
  5. 5Santyoku 53
  6. 6Gangneung 52
  7. 7Hongch’ŏn 46
  8. 8Neietsu 45
  9. 9Jumunjin 41
  10. 10Chuncheon 39
  11. 11Yanggu 38
  12. 12T’aebaek 38
  13. 13Hwacheon 36
  14. 14Kosong 28
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

Bad-air episodes in Gangwon-do

Times when many cities around here had PM2.5 at twice their usual or more on the same days.

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SmogRank, most polluted cities in Gangwon-do, South Korea, PM2.5, last 7 days to 2 Oct 2026, 10:00 UTC, smogrank.com/kr/region/gangwon-do?w=7d.

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