40 CFR 52.1521 - Classification of regions.

The New Hampshire plan was evaluated on the basis of the following classifications:

Air quality control region	Pollutant					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]