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South Korea’s air quality standards
| 1-h concentration | 24-h concentration | Annual concentration | |
|---|---|---|---|
| SO2 | 0.15 ppm | 0.05 ppm | 0.02 ppm |
| CO | 25 ppm | 9 ppm | 9 ppm |
| O3 | 0.1 ppm | 0.06 ppm | 0.06 ppm |
| NO2 | 0.1 ppm | 0.06 ppm | 0.03 ppm |
| PM10 | 100μg/m3 | 100μg/m3 | 50μg/m3 |
Because CO and O3 do not have 24-h and annual standards available, the 8-h standard is used as the annual standard
