| Region |
24-hour Sub-Index at 4 PM on 15 Mar 2010 |
PSI* |
Air Quality Descriptor |
Responsible Pollutant |
| Sulphur Dioxide |
PM10 |
Ozone |
Carbon Monoxide |
Nitrogen Dioxide+ |
| North |
4 |
45 |
13 |
11 |
- |
45 |
Good |
PM10 |
| South |
1 |
25 |
12 |
8 |
- |
25 |
Good |
PM10 |
| East |
2 |
22 |
11 |
6 |
- |
22 |
Good |
PM10 |
| West |
4 |
38 |
13 |
6 |
- |
38 |
Good |
PM10 |
| Central |
6 |
34 |
10 |
6 |
- |
34 |
Good |
PM10 |
| Overall Singapore* |
6 |
45 |
13 |
11 |
- |
45 |
Good |
PM10 |