Daebu-dong, Ansan-si, Gyeonggi PM2.5 (fine particulate matter) AQI is 9 - Daebu-dong, Ansan-si, Gyeonggi PM10 (respirable particulate matter) AQI is 10 - Daebu-dong, Ansan-si, Gyeonggi NO2 (nitrogen dioxide) AQI is 4 - Daebu-dong, Ansan-si, Gyeonggi SO2 (sulfur dioxide) AQI is 3 - Daebu-dong, Ansan-si, Gyeonggi O3 (ozone) AQI is 25 - Daebu-dong, Ansan-si, Gyeonggi CO (carbon monoxide) AQI is 2 -