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

Most polluted cities in Gyeonggi-do, South Korea

25 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Pubal at 14.1 µg/m³, #374 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: 25 measured citiesGyeongsangbuk-do: 17 measured citiesChungcheongnam-do: 14 measured citiesGangwon-do: 15 measured citiesNorth Chungcheong: 7 measured cities#25 Yangju: 5.8 µg/m³#24 Yangp'yŏng: 7.6 µg/m³#23 Anseong: 8.1 µg/m³#22 Seongnam-si: 8.6 µg/m³#21 Hwado: 9.1 µg/m³#18 Gwangju: 9.2 µg/m³#19 Namyangju: 9.2 µg/m³#20 Wabu: 9.2 µg/m³#16 Hwaseong-si: 9.8 µg/m³#17 Hanam: 9.8 µg/m³#14 Uijeongbu-si: 10.2 µg/m³#15 Bucheon-si: 10.2 µg/m³#13 Suwon: 10.6 µg/m³#12 Munsan: 10.7 µg/m³#11 Osan: 10.8 µg/m³#10 Anyang-si: 10.9 µg/m³#9 Ansan-si: 11.2 µg/m³#8 Guri-si: 11.4 µg/m³#7 Goyang-si: 11.5 µg/m³#6 Icheon-si: 11.8 µg/m³#5 Pyeongtaek: 12.0 µg/m³#4 Gwangmyeong: 12.3 µg/m³#2 Yeoju: 13.5 µg/m³#3 Gimpo-si: 13.5 µg/m³#1 Pubal: 14.1 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Pubal 0% 0.75%0
Every measured city in Gyeonggi-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. 1Pubal 0%
  2. 2Yeoju 0%
  3. 2Gimpo-si 0%
  4. 4Gwangmyeong 0%
  5. 5Pyeongtaek 0%
  6. 6Icheon-si 0%
  7. 7Goyang-si 0%
  8. 8Guri-si 0%
  9. 9Ansan-si 0%
  10. 10Anyang-si 0%
  11. 11Osan 0%
  12. 12Munsan 0%
  13. 13Suwon 0%
  14. 14Uijeongbu-si 0%
  15. 14Bucheon-si 0%
  16. 16Hwaseong-si 0%
  17. 16Hanam 0%
  18. 18Gwangju 0%
  19. 18Namyangju 0%
  20. 18Wabu 0%
  21. 21Hwado 0%
  22. 22Seongnam-si 0%
  23. 23Anseong 0%
  24. 24Yangp'yŏng 0%
  25. 25Yangju 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

Estimated: cities without a monitor

Gyeonggi-do cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.

City7-day estimateBand
Gunpo≈ 10 µg/m³Moderate
Uiwang≈ 10 µg/m³Moderate

Bad-air episodes in Gyeonggi-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 Gyeonggi-do, South Korea, PM2.5, last 30 days to 6 Oct 2026, 22:00 UTC, smogrank.com/kr/region/gyeonggi-do?w=30d.

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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.