Data Summary Graphs
The data summary graphs listed below demonstrate how Vermont's air quality compares to the National Ambient Air Quality Standards (NAAQS). These data summary graphs show the trends relative to the NAAQS through 2022 and are updated on a yearly basis.
Ozone (O3) 8-Hour Average
Value for each year is the average of the EPA design value* for the previous three-years.
Reference: EPA Design Value Report AMP480 6/12/23