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

Most polluted cities in Jeju-do, South Korea

3 measured cities, last 7 days; 0 above the WHO 24-hour guideline. Worst: Seogwipo at 8.0 µg/m³, #1,228 in the world.

Jeju-do: 3 measured cities#3 Gaigeturi: 6.4 µg/m³#2 Jeju City: 7.2 µg/m³#1 Seogwipo: 8.0 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Seogwipo 8.0 WHO 24-hour guideline
Every measured city in Jeju-do, South Korea, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1Seogwipo 12
  2. 2Jeju City 11
  3. 3Gaigeturi 10
Excellent0–50
Good51–100
Lightly polluted101–150
Moderately polluted151–200
Heavily polluted201–300
Severely polluted301+

China's Air Quality Index (HJ 633-2012), PM2.5 individual index. 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/m³Excellent
Seodong≈ 8 µg/m³Excellent
Ara-dong≈ 9 µg/m³Excellent
Ora-dong≈ 8 µg/m³Excellent

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SmogRank, most polluted cities in Jeju-do, South Korea, PM2.5, last 7 days to 2 Oct 2026, 05:00 UTC, smogrank.com/kr/region/jeju-do?w=7d.

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Updated 2026-10-02 05:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the China AQI PM2.5 sub-index.