40 CFR 52.1521 - Classification of regions.

Regulations last checked for updates: May 14, 2024

Title 40 - Protection of Environment last revised: May 10, 2024

§ 52.1521 - Classification of regions.

The New Hampshire 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	Ozone
Androscoggin Valley Interstate	IA	III	III	III	III
Central New Hampshire Intrastate	III	III	III	III	III
Merrimack Valley—Southern New Hampshire Interstate	I	III	III	III	I

[37 FR 10879, May 31, 1972, as amended at 45 FR 24876, Apr. 11, 1980; 80 FR 78141, Dec. 16, 2015; 81 FR 44554, July 8, 2016]

authority: 42 U.S.C. 7401

cite as: 40 CFR 52.1521