SmogRank / World / South Korea / Gangwon-do / March 2025

Most polluted cities in Gangwon-do, South Korea, March 2025

15 cities in Gangwon-do, South Korea ranked by their average PM2.5 over the 31 days. Worst: Cheorwon at 30.2 µg/m³, #288 of 2,809 cities in the world. Cleanest: Kosong at 12.0. A city needs measurements on 70% of the days to be ranked.

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.

← Wŏnju 35% 30%0
Every city in Gangwon-do, South Korea ranked for March 2025, 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
    35%
  2. 2Cheorwon
    32%
  3. 3Chuncheon
    19%
  4. 4Hongch’ŏn
    19%
  5. 5Yanggu
    13%
  6. 6T’aebaek
    11%
  7. 7Pyeongchang
    10%
  8. 8Neietsu
    6%
  9. 9Hwacheon
    6%
  10. 10Santyoku
    0%
  11. 11Gangneung
    0%
  12. 12Donghae City
    0%
  13. 13Jumunjin
    0%
  14. 14Sokcho
    0%
  15. 15Kosong
    0%
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, March 2025 · All cities in South Korea, March 2025 · Gangwon-do now

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SmogRank, most polluted cities in Gangwon-do, South Korea, PM2.5, March 2025, smogrank.com/kr/region/gangwon-do/history/2025-03 (accessed 7 Oct 2026).

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