40 CFR 52.2521 - Classification of regions.

The West Virginia 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)	Steubenville-Weirton-Wheeling Interstate	I	I	III	III	III	Parkersburg-Marietta Interstate	I	II	III	III	III	Huntington-Ashland-Portsmouth-Ironton Interstate	I	III	III	III	III	Kanawha Valley Intrastate	I	III	III	III	III	Southern West Virginia Intrastate	III	III	III	III	III	North Central West Virginia Intrastate	I	III	III	III	III	Cumberland-Keyser Interstate	I	I	III	III	III	Central West Virginia Intrastate	III	III	III	III	III	Allegheny Intrastate	III	III	III	III	III	Eastern Panhandle Intrastate	III	III	III	III	III

[37 FR 10902, May 31, 1972]