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

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

26 cities in Gyeonggi-do, South Korea ranked by their average PM2.5 over the 31 days. Worst: Pubal at 32.5 µg/m³, #249 of 2,809 cities in the world. Cleanest: Hwado at 16.7. 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.

← Pubal 48% 40%0
Every city in Gyeonggi-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. 1Pubal
    48%
  2. 2Suwon
    42%
  3. 2Gimpo-si
    42%
  4. 4Bucheon-si
    42%
  5. 5Osan
    42%
  6. 6Yeoju
    42%
  7. 7Ansan-si
    42%
  8. 8Goyang-si
    42%
  9. 9Gwangju
    42%
  10. 10Anyang-si
    39%
  11. 11Pyeongtaek
    39%
  12. 12Anseong
    39%
  13. 13Icheon-si
    39%
  14. 14Guri-si
    39%
  15. 15Hwaseong-si
    39%
  16. 16Yangp'yŏng
    39%
  17. 17Munsan
    35%
  18. 18Gwangmyeong
    35%
  19. 19Uijeongbu-si
    35%
  20. 20Hanam
    32%
  21. 21Seongnam-si
    32%
  22. 22Yangju
    32%
  23. 23Namyangju
    29%
  24. 24Wabu
    26%
  25. 25Gapyeong
    19%
  26. 26Hwado
    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

All cities in the world, March 2025 · All cities in South Korea, March 2025 · Gyeonggi-do now

Use this board

SmogRank, most polluted cities in Gyeonggi-do, South Korea, PM2.5, March 2025, smogrank.com/kr/region/gyeonggi-do/history/2025-03 (accessed 6 Oct 2026).

Download top 10 (PNG)

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.