The Virginia plan was evaluated on the basis of the following classifications:
| Air quality control region
| Pollutant
|
|---|
| Particulate matter
| Sulfur oxides
| Nitrogen dioxide
| Carbon monoxide
| Photochemical oxidants (hydrocarbons)
|
|---|
| Eastern Tennessee-Southwestern Virginia Interstate | I | I | III | III | III
|
| Valley of Virginia Intrastate | I | III | III | III | III
|
| Central Virginia Intrastate | I | III | III | III | III
|
| Northeastern Virginia Intrastate | IA | III | III | III | III
|
| State Capital Intrastate | I | III | III | III | I
|
| Hampton Roads Intrastate | I | II | III | III | I
|
| National Capital Interstate | I | I | III | I | I |