52.2371—Classification of regions.
The Vermont plan was evaluated on the basis of the following classifications:
| Air quality control region | Pollutant | ||||
|---|---|---|---|---|---|
| Particulate matter | Sulfur oxides | Nitrogen dioxide | Carbon monoxide | Ozone | |
| Champlain Valley Interstate | II | II | III | III | III |
| Vermont Intrastate | II | II | III | III | III |