Pollutant Averaging Time 2015 2016 2017 2010 Air Quality Target for SG
Sulfur Dioxide (SO2) (pg/m3) 24-hour2 75 61 59 50
Annual 12 13 12 15
Nitrogen Dioxide (NO2) (pg/m3) 1-hour2 99 123 158 200
Annual 22 26 25 40
Ozone (pg/m3) 8-hour2 152 115 191 100
Patriculate Matter (PM) 10 (pg/m3) 24-hour2 186 61 57 50
Annual 37 26 25 20
Patriculate Matter (PM) 2.5 (pg/m3) 24-hour2 145 40 34 37.5
Annual 24 15 14 12
Carbon Monoxide (CO) (mg/m3) 24-hour2 3.5 2.7 2.3 30
Annual 3.3 2.2 1.7 10