40 CFR 52.1821 - Classification of regions.

The North Dakota 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)	Metropolitan Fargo-Moorhead Interstate	II	III	III	III	III	North Dakota Intrastate	II	III	III	III	III

[37 FR 10885, May 31, 1972]