40 CFR § 52.1771
Classification of regions
June 9, 2020
The North Carolina plan was evaluated on the basis of the following classifications:
Open Table
Air quality control region | Pollutant | ||||
---|---|---|---|---|---|
Particulate matter | Sulfur oxides | Nitrogen dioxide | Carbon monoxide | Photochemical oxidants (hydrocarbons) | |
Western Mountain Intrastate | I | III | III | III | III |
Eastern Mountain Intrastate | I | III | III | III | III |
Metropolitan Charlotte Interstate | I | II | III | III | I |
Northern Piedmont Intrastate | I | III | III | III | III |
Eastern Piedmont Intrastate | I | III | III | III | III |
Northern Coastal Intrastate | I | III | III | III | III |
Southern Coastal Intrastate | II | III | III | III | III |
Sandhills Intrastate | II | III | III | III | III |
[37 FR 10884, May 31, 1972]