40 CFR § 52.1621
Classification of regions
June 9, 2020
The New Mexico 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 | |
| Albuquerque-Mid-Rio Grande Intrastate | I | III | III | III | I |
| New Mexico Southern Border Intrastate | IA | IA | III | III | III |
| El Paso-Las Cruces-Alamogordo Interstate | I | IA | III | I | I |
| Four Corners Interstate | IA | IA | III | III | III |
| Northeastern Plains Intrastate | III | III | III | III | III |
| Pecos-Permian Basin Intrastate | III | III | III | III | III |
| Southwestern Mountains-Augustine Plains Intrastate | III | III | III | III | III |
| Upper Rio Grande Valley Intrastate | III | III | III | III | III |
[37 FR 1081, May 31, 1972, as amended at 39 FR 16347, May 8, 1974; 42 FR 20131, Apr. 18, 1977; 45 FR 24468, Apr. 10, 1980; 45 FR 67347, Oct. 10, 1980; 52 FR 5965, Feb. 27, 1987]
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