The Connecticut plan was evaluated on the basis of the following classifications:
Air quality control region | Pollutant | ||||
Particulate matter | Sulfur oxides | Nitrogen dioxide | Carbon monoxide | Ozone | |
New Jersey-New York-Connecticut Interstate | I | I | I | I | I |
Hartford-New Haven-Springfield Interstate | I | I | III | I | I |
Northwestern Intrastate | III | III | III | III | III |
Eastern Intrastate | II | III | III | III | III |
40 C.F.R. §52.371