Additional trend graphs can be found in the annual Air Quality Report.
NAAQS = National Ambient Air Quality Standard
Pollutant | Design Value |
Carbon Monoxide (CO) | 2nd highest 8-hour average |
Lead (Pb) | highest 3-month average |
Nitrogen dioxide (NO2) | annual average |
Ozone (O3) | 3-year average of the 4th highest daily maximum 8-hour average |
Sulfur Dioxide (SO2) | 99th percentile daily maximum 1-hour concentration |