Pollutant | Primary/ Secondary | Averaging Time | Level | Form | |
Nitrogen Dioxide (NO2) | Primary | 1 hour | 100 ppb | 98th percentile of 1-hour daily maximum concentrations, averaged over 3 years | |
Primary and Secondary | 1 year | 53 ppb | Annual Mean | ||
Ozone (O3) | Primary and Secondary | 8 hours | 0.070 ppm | Annual fourth-highest daily maximum 8-hour concentration, averaged over 3 years | |
Particle Matter | PM2.5 | Primary | 1 year | 12.0 μg/m3 | Annual mean, averaged over 3 years |
Primary and Secondary | 24 hours | 35 μg/m3 | 98th percentile, averaged over 3 years | ||
PM10 | Primary and Secondary | 24 hours | 150 μg/m3 | Not to be exceeded more than once per year on average over 3 years |