The Oklahoma plan was evaluated on the basis of the following classifications:
Air quality control region
| Pollutant
|
---|
Particulate matter
| Sulfur oxides
| Nitrogen dioxide
| Carbon monoxide
| Ozone
|
---|
Central Oklahoma Intrastate | I | III | III | III | I
|
Northeastern Oklahoma Intrastate | I | III | III | III | I
|
Southeastern Oklahoma Intrastate | III | III | III | III | III
|
North Central Oklahoma Intrastate | III | III | III | III | III
|
Southwestern Oklahoma Intrastate | III | III | III | III | III
|
Northwestern Oklahoma Intrastate | III | III | III | III | III
|
Metropolitan Fort Smith Interstate | II | III | III | III | III
|
Shreveport-Texarkana-Tyler Interstate | II | III | III | III | III |
[37 FR 10887, May 31, 1972, as amended at 45 FR 9741, Feb. 13, 1980]