National Ambient Air Quality Standards Standards Standards

| Pollutant | Type_ | Standard | Averaging_Time | Regulatory_Citation |
|---|---|---|---|---|
| O 3 | Primary and Secondary | 0.075 ppm (150 μg/m³) | 8-hour | 40 CFR 50.10(a) |
| NO 2 | Primary and Secondary | 0.053 ppm (100 μg/m³) | annual | 40 CFR 50.11(a) and (b) |
| Pb | Primary and Secondary | 0.15 μg/m³ | Rolling 3 months | 40 CFR 50.12 |