52.71—Classification of regions.
The Alaska plan was evaluated on the basis of the following classifications:
Air quality control Region | Pollutant | ||||
---|---|---|---|---|---|
Particulate matter | Sulfur oxides | Nitrogen dioxide | Carbon monoxide | Ozone | |
Cook Inlet Intrastate | I | III | III | I | III. |
Northern Alaska Intrastate | I | III | III | I | III. |
South Central Alaska Intrastate | III | III | III | III | III. |
Southeastern Alaska Intrastate | III | III | III | III | III. |