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

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

26 cities in Gyeonggi-do, South Korea ranked by their average PM2.5 over the 31 days. Worst: Gimpo-si at 20.4 µg/m³, #259 of 2,771 cities in the world. Cleanest: Hwado at 13.6. 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.

← Ansan-si 10% 9%0
Every city in Gyeonggi-do, South Korea ranked for May 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. 1Ansan-si
    10%
  2. 2Goyang-si
    10%
  3. 3Bucheon-si
    10%
  4. 4Hwaseong-si
    10%
  5. 5Pubal
    7%
  6. 6Gimpo-si
    6%
  7. 7Osan
    6%
  8. 7Guri-si
    6%
  9. 9Gwangmyeong
    6%
  10. 10Icheon-si
    6%
  11. 11Yeoju
    3%
  12. 12Anyang-si
    3%
  13. 13Pyeongtaek
    3%
  14. 14Hwado
    3%
  15. 15Suwon
    0%
  16. 16Uijeongbu-si
    0%
  17. 17Hanam
    0%
  18. 18Munsan
    0%
  19. 18Gwangju
    0%
  20. 20Yangp'yŏng
    0%
  21. 21Namyangju
    0%
  22. 22Anseong
    0%
  23. 23Wabu
    0%
  24. 24Seongnam-si
    0%
  25. 25Yangju
    0%
  26. 26Gapyeong
    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, May 2025 · All cities in South Korea, May 2025 · Gyeonggi-do now

Use this board

SmogRank, most polluted cities in Gyeonggi-do, South Korea, PM2.5, May 2025, smogrank.com/kr/region/gyeonggi-do/history/2025-05 (accessed 7 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.