U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 52Subpart XX - Subpart XX—West Virginia
View all text of Subpart XX [§ 52.2520 - § 52.2565]
§ 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 InterstateIIIIIIIIIII
Parkersburg-Marietta InterstateIIIIIIIIIIII
Huntington-Ashland-Portsmouth-Ironton InterstateIIIIIIIIIIIII
Kanawha Valley IntrastateIIIIIIIIIIIII
Southern West Virginia IntrastateIIIIIIIIIIIIIII
North Central West Virginia IntrastateIIIIIIIIIIIII
Cumberland-Keyser InterstateIIIIIIIIIII
Central West Virginia IntrastateIIIIIIIIIIIIIII
Allegheny IntrastateIIIIIIIIIIIIIII
Eastern Panhandle IntrastateIIIIIIIIIIIIIII
[37 FR 10902, May 31, 1972]
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