CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS > SUBPART VV—Virginia (§52.2420 to §52.2465) > 52.2421—Classification of regions.

52.2421—Classification of regions.

The 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)
Eastern Tennessee-Southwestern Virginia Interstate I I III III III
Valley of Virginia Intrastate I III III III III
Central Virginia Intrastate I III III III III
Northeastern Virginia Intrastate IA III III III III
State Capital Intrastate I III III III I
Hampton Roads Intrastate I II III III I
National Capital Interstate I I III I I

Code of Federal Regulations

[37 FR 15090, July 27, 1972, as amended at 39 FR 16347, May 8, 1974]