40 C.F.R. § 52.2771
Classification of regions
The U.S. Virgin Islands 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) | |
| U.S. Virgin Islands | IA | IA | III | III | III |