The North Dakota 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)
|
---|
Metropolitan Fargo-Moorhead Interstate | II | III | III | III | III
|
North Dakota Intrastate | II | III | III | III | III |
[37 FR 10885, May 31, 1972]