SmogRank / World / Asia / South Korea / Incheon

Most polluted cities in Incheon, South Korea

2 measured cities, last 30 days; 2 above the WHO 24-hour guideline. Worst: Ganghwa-gun at 95.2 µg/m³, #39 in the world.

Seoul: 1 measured cityIncheon: 2 measured citiesGyeonggi-do: 25 measured cities#2 Incheon: 25.9 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.

Not on this map: #1 Ganghwa-gun 95.2.

  1. 1Ganghwa-gun 179
  2. 2Incheon 82
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

Bad-air episodes in Incheon

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 Incheon, South Korea, PM2.5, last 30 days to 2 Oct 2026, 11:00 UTC, smogrank.com/kr/region/incheon?w=30d.

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Updated 2026-10-02 11:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.