§ 52.2821 Classification of regions.
The American Samoa plan was evaluated on the basis of the following classifications:
| Air quality control region | Pollutant | ||||
|---|---|---|---|---|---|
| Particulate matter | Sulfur oxides | Nitrogen dioxide | Carbon monoxide | Photochemical oxidants (hydrocarbons) | |
| American Samoa | III | III | III | III | III |
[37 FR 10906, May 31, 1972]