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 |
[37 FR 10905, May 31, 1972]