40 CFR § 52.1071
Classification of regions
June 9, 2020
The Maryland plans were evaluated on the basis of the following classifications:
Open Table
| 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 |
[37 FR 10870, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 45 FR 53475, Aug. 12, 1980]
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