40 C.F.R. § 52.2171
Current through September 30, 2024
The South Dakota plan evaluated on the basis of the following classifications:
| Air quality control region | Pollutant | ||||
| Particulate matter | Sulfur oxides | Nitrogen dioxide | Carbon monoxide | Photochemical oxidants (hydrocarbons) | |
| Metropolitan Sioux City Interstate | III | III | III | III | III |
| Metropolitan Sioux Falls Interstate | II | III | III | III | III |
| Black Hills-Rapid City Intrastate | III | III | III | III | III |
| South Dakota Intrastate | III | III | III | III | III |
40 C.F.R. §52.2171