40 CFR § 52.1271
Classification of regions
June 9, 2020
The Mississippi 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 | Photochemical oxidants (hydrocarbons) | |
| Mobile (Alabama)-Pensacola-Panama City (Florida)-Gulfport (Mississippi) Interstate | I | I | III | III | I |
| Metropolitan Memphis Interstate | I | III | III | III | I |
| Mississippi Delta Intrastate | III | III | III | III | III |
| Northeast Mississippi Intrastate | II | III | III | III | III |
[37 FR 10875, May 31, 1972, as amended at 39 FR 16346, May 8, 1974]
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