Air Quality Standards
Air pollutants, National ambient air quality standard
| Air pollutants |
National ambient air quality standard |
| PM2.5 |
Yearly |
15㎍/㎥ or less |
| 24-hour |
35㎍/㎥ or less |
| PM10 |
Yearly |
50㎍/㎥ or less |
| 24-hour |
100㎍/㎥ or less |
| O3 |
8-hour |
0.06ppm or less |
| 1-hour |
0.1ppm or less |
| NO2 |
Yearly |
0.03ppm or less |
| 24-hour |
0.06ppm or less |
| 1-hour |
0.10ppm or less |
| CO |
8-hour |
9ppm or less |
| 1-hour |
25ppm or less |
| SO2 |
Yearly |
0.02ppm or less |
| 24-hour |
0.05ppm or less |
| 1-hour |
0.15ppm or less |
| Pb |
Yearly |
0.5㎍/㎥ or less |
| Benzene |
Yearly |
5㎍/㎥ or less |
