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 V—Maryland (§52.1070 to §52.1118) > 52.1071—Classification of regions.

52.1071—Classification of regions.

The Maryland plans were evaluated on the basis of the following classifications:
Air quality control region Pollutant
Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone
Cumberland-Keyser Interstate I I III III III
Central Maryland Intrastate II II III III III
Metropolitan Baltimore Intrastate I I I I I
National Capital Interstate I I III I I
Southern Maryland Intrastate III III III III III
Eastern Shore Intrastate II III III III III

Code of Federal Regulations

[37 FR 10870, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 45 FR 53475, Aug. 12, 1980]