40 CFR 52.2721 - Classification of regions.

Regulations last checked for updates: Nov 25, 2024

Title 40 - Protection of Environment last revised: Nov 21, 2024

§ 52.2721 - Classification of regions.

The Puerto Rico plan was evaluated on the basis of the following classifications.

Air quality control region	Pollutant
Air quality control region	Particulate matter	Sulfur oxides	Nitrogen dioxide	Carbon monoxide	Photochemical oxidants (hydrocarbons)
Puerto Rico	IA	IA	III	III	III

[37 FR 10905, May 31, 1972]

cite as: 40 CFR 52.2721