40 CFR 52.1871 - Classification of regions.

The Ohio plan was evaluated on the basis of the following classifications:

Air quality control region	Pollutant					Particulate matter	Sulfur oxides	Nitrogen dioxide	Carbon monoxide	Ozone	Greater Metropolitan Cleveland Intrastate	I	I	III	III	I	Huntington (West Virginia)-Ashland (Kentucky)-Portsmouth-Ironton (Ohio) Interstate	I	III	III	III	III	Mansfield-Marion Intrastate	II	II	III	III	III	Metropolitan Cincinnati Interstate	I	II	III	III	I	Metropolitan Columbus Intrastate	I	III	III	III	I	Metropolitan Dayton Intrastate	I	II	III	III	I	Metropolitan Toledo Interstate	I	I	III	III	I	Northwest Ohio Intrastate	II	I	III	III	III	Northwest Pennsylvania-Youngstown Interstate	I	II	III	III	III	Parkersburg (West Virginia)-Marietta (Ohio) Interstate	I	II	III	III	III	Sandusky Intrastate	III	III	III	III	III	Steubenville-Weirton-Wheeling Interstate	I	I	III	III	III	Wilmington-Chillicothe-Logan Intrastate	III	III	III	III	III	Zanesville-Cambridge Intrastate	II	IA	III	III	III

[37 FR 10886, May 31, 1972, as amended at 39 FR 16347, May 8, 1974; 45 FR 72146, Oct. 31, 1980]