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

Most polluted cities in Gangwon-do, South Korea

15 measured cities, this year; 15 above the WHO annual guideline. Worst: Cheorwon at 18.4 µg/m³, #405 in the world.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

Seoul: 2 measured citiesIncheon: 2 measured citiesGyeonggi-do: 26 measured citiesGyeongsangbuk-do: 17 measured citiesChungcheongnam-do: 14 measured citiesDaejeon: 2 measured citiesGangwon-do: 15 measured citiesNorth Chungcheong: 7 measured cities#15 Kosong: 10.2 µg/m³#14 T’aebaek: 11.6 µg/m³#13 Gangneung: 12.1 µg/m³#12 Jumunjin: 12.2 µg/m³#11 Hwacheon: 12.9 µg/m³#10 Yanggu: 13.1 µg/m³#9 Chuncheon: 13.5 µg/m³#8 Neietsu: 13.9 µg/m³#5 Sokcho: 14.9 µg/m³#6 Santyoku: 14.9 µg/m³#7 Hongch’ŏn: 14.9 µg/m³#4 Pyeongchang: 15.2 µg/m³#3 Donghae City: 15.4 µg/m³#2 Wŏnju: 17.7 µg/m³#1 Cheorwon: 18.4 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Wŏnju 8% 8%0
Every measured city in Gangwon-do, South Korea, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Wŏnju 8%
  2. 2Cheorwon 8%
  3. 3Pyeongchang 5%
  4. 4Hongch’ŏn 5%
  5. 5Chuncheon 5%
  6. 6Yanggulast full day 2 Oct 5%
  7. 7Santyoku 4%
  8. 8Neietsu 4%
  9. 9Hwacheon 4%
  10. 10T’aebaek 3%
  11. 11Gangneung 3%
  12. 12Donghae City 3%
  13. 13Kosong 3%
  14. 14Jumunjin 3%
  15. 15Sokcho 3%
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, this year to 6 Oct 2026, 22:00 UTC, smogrank.com/kr/region/gangwon-do?w=year.

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Updated 2026-10-06 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.