| 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 |
