Geomdan, Seo-gu, Incheon PM2.5 (fine particulate matter) AQI is 82 - Geomdan, Seo-gu, Incheon PM10 (respirable particulate matter) AQI is 37 - Geomdan, Seo-gu, Incheon NO2 (nitrogen dioxide) AQI is 14 - Geomdan, Seo-gu, Incheon SO2 (sulfur dioxide) AQI is 4 - Geomdan, Seo-gu, Incheon O3 (ozone) AQI is 23 - Geomdan, Seo-gu, Incheon CO (carbon monoxide) AQI is 5 -