The Maine plan was evaluated on the basis of the following classifications:
Air quality control region
| Pollutant
|
---|
Particulate matter
| Sulfur oxides
| Nitrogen dioxide
| Carbon monoxide
| Ozone
|
---|
Metropolitan Portland Intrastate | I | II | III | III | III
|
Androscoggin Valley Interstate | IA | IA | III | III | III
|
Down East Intrastate | IA | IA | III | III | III
|
Aroostook Intrastate | III | III | III | III | III
|
Northwest Maine Intrastate | III | III | III | III | III |
[37 FR 10870, May 31, 1972, as amended at 45 FR 10774, Feb. 19, 1980]