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

Most polluted cities in Jeju-do, South Korea

3 measured cities, last 30 days; 3 above the WHO 24-hour guideline. Worst: Gaigeturi at 195.2 µg/m³, #5 in the world.

Jeju-do: 3 measured cities#3 Jeju City: 91.9 µg/m³#2 Seogwipo: 168.9 µg/m³#1 Gaigeturi: 195.2 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Gaigeturi 195.2 µg/m³ 150 µg/m³15 WHO 24-hour guideline
Every measured city in Jeju-do, South Korea, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1Gaigeturi 10
  2. 2Seogwipo 10
  3. 3Jeju City 10
Low1–3
Moderate4–6
High7–9
Very high10

The UK's Daily Air Quality Index (1 to 10), PM2.5 bands. 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

Jeju-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
Tallang-dong≈ 8 µg/m³Low
Seodong≈ 8 µg/m³Low
Ara-dong≈ 9 µg/m³Low
Ora-dong≈ 8 µg/m³Low

Use this board

SmogRank, most polluted cities in Jeju-do, South Korea, PM2.5, last 30 days to 2 Oct 2026, 06:00 UTC, smogrank.com/kr/region/jeju-do?w=30d.

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

Updated 2026-10-02 06:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the UK DAQI PM2.5 sub-index.