The West 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)
|
|---|
| Steubenville-Weirton-Wheeling Interstate | I | I | III | III | III
|
| Parkersburg-Marietta Interstate | I | II | III | III | III
|
| Huntington-Ashland-Portsmouth-Ironton Interstate | I | III | III | III | III
|
| Kanawha Valley Intrastate | I | III | III | III | III
|
| Southern West Virginia Intrastate | III | III | III | III | III
|
| North Central West Virginia Intrastate | I | III | III | III | III
|
| Cumberland-Keyser Interstate | I | I | III | III | III
|
| Central West Virginia Intrastate | III | III | III | III | III
|
| Allegheny Intrastate | III | III | III | III | III
|
| Eastern Panhandle Intrastate | III | III | III | III | III |