SmogRank / World / South Korea / Gyeonggi-do / 2024

Most polluted cities in Gyeonggi-do, South Korea, 2024

26 cities in Gyeonggi-do, South Korea ranked by their average PM2.5 over the 366 days; 26 above the WHO annual guideline (5.0 µg/m³). Worst: Yeoju at 19.2 µg/m³, #121 of 2,052 cities in the world. Cleanest: Gapyeong at 11.8. A city needs measurements on 70% of the days to be ranked.

OpenAQ's archive, where our readings come from, has almost none for one of these days. Cities in the United States and Europe have it from the EPA's and the European Environment Agency's own records of the same monitors; elsewhere a city's average is over its other days. Why.

About 226K people in these 20 cities breathed unhealthy air on an average day of 2024.

Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.

← Goyang-si 33.9K 30K0
Every city in Gyeonggi-do, South Korea ranked for 2024 with monitors in two or more places, one column each, ranked by people breathing unhealthy air: height is people on an average day, colour its average. Point at it to read a city; tap to open it.
  1. 1Goyang-si
    33.9K
  2. 2Pyeongtaek
    27.2K
  3. 3Suwon
    26.3K
  4. 4Hwaseong-si
    23.1K
  5. 5Bucheon-si
    21.1K
  6. 6Ansan-si
    17.7K
  7. 7Anyang-si
    12.7K
  8. 8Icheon-si
    10.4K
  9. 9Osan
    8.47K
  10. 10Gimpo-si
    7.93K
  11. 11Uijeongbu-si
    6.8K
  12. 12Yeoju
    6.79K
  13. 13Seongnam-si
    6.49K
  14. 14Guri-si
    5.54K
  15. 15Hanam
    4.51K
  16. 16Yangp'yŏng
    2.66K
  17. 17Yangju
    2.58K
  18. 18Gwangju
    1.45K
  19. 19Namyangju
    644
  20. 20Munsan
    153
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, 2024 · All cities in South Korea, 2024 · Gyeonggi-do now

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SmogRank, most polluted cities in Gyeonggi-do, South Korea, PM2.5, 2024, smogrank.com/kr/region/gyeonggi-do/history/2024 (accessed 6 Oct 2026).

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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.