40 CFR § 52.2571
Classification of regions
June 9, 2020
The Wisconsin 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 | 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 |
[37 FR 10902, May 31, 1972, as amended at 39 FR 16348, May 8, 1974; 45 FR 2322, Jan. 11, 1980]
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