52.2571—Classification of regions.
The Wisconsin plan was evaluated on the basis of the following classifications:
Air quality control region | Pollutant | ||||
---|---|---|---|---|---|
Particulate matter | Sulfur oxides | Nitrogen dioxide | Carbon monoxide | Ozone | |
Duluth (Minnesota)-Superior (Wisconsin) Interstate | I | II | III | III | III |
North Central Wisconsin Intrastate | II | III | III | III | III |
Lake Michigan Intrastate | II | III | III | III | III |
Southeast Minnesota-La Crosse (Wisconsin) Interstate | II | IA | III | III | III |
Southern Wisconsin Intrastate | II | III | III | III | III |
Southeastern Wisconsin Intrastate | I | II | III | III | I |
Rockford (Illinois)-Jamesville-Beloit (Wisconsin) Interstate | II | III | III | III | III |
Metropolitan Dubuque Interstate | I | III | III | III | III |