Title 40
SECTION 52.2721
52.2721 Classification of regions.
§ 52.2721 Classification of regions.The Puerto Rico 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) | |
| Puerto Rico | IA | IA | III | III | III |