The New Hampshire plan was evaluated on the basis of the following classifications:
Air quality control region | Pollutant | ||||
Particulate matter | Sulfur oxides | Nitrogen dioxide | Carbon monoxide | Ozone | |
Androscoggin Valley Interstate | IA | III | III | III | III |
Central New Hampshire Intrastate | III | III | III | III | III |
Merrimack Valley-Southern New Hampshire Interstate | I | III | III | III | I |
40 C.F.R. §52.1521