40 CFR § 52.1871
Classification of regions
June 9, 2020
The Ohio 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 | |
| Greater Metropolitan Cleveland Intrastate | I | I | III | III | I |
| Huntington (West Virginia)-Ashland (Kentucky)-Portsmouth-Ironton (Ohio) Interstate | I | III | III | III | III |
| Mansfield-Marion Intrastate | II | II | III | III | III |
| Metropolitan Cincinnati Interstate | I | II | III | III | I |
| Metropolitan Columbus Intrastate | I | III | III | III | I |
| Metropolitan Dayton Intrastate | I | II | III | III | I |
| Metropolitan Toledo Interstate | I | I | III | III | I |
| Northwest Ohio Intrastate | II | I | III | III | III |
| Northwest Pennsylvania-Youngstown Interstate | I | II | III | III | III |
| Parkersburg (West Virginia)-Marietta (Ohio) Interstate | I | II | III | III | III |
| Sandusky Intrastate | III | III | III | III | III |
| Steubenville-Weirton-Wheeling Interstate | I | I | III | III | III |
| Wilmington-Chillicothe-Logan Intrastate | III | III | III | III | III |
| Zanesville-Cambridge Intrastate | II | IA | III | III | III |
[37 FR 10886, May 31, 1972, as amended at 39 FR 16347, May 8, 1974; 45 FR 72146, Oct. 31, 1980]
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