40 CFR § 52.321
Classification of regions
June 9, 2020
The revised Denver Emergency Episode Plan, adopted by the State of Colorado February 28, 1996, was submitted by the Governor of Colorado with a September 16, 1997 letter.
Open Table
| Air quality control region | Pollutant | ||||
|---|---|---|---|---|---|
| Particulate matter | Sulfur oxides | Nitrogen dioxide | Carbon monoxide | Ozone | |
| Pawnee Intrastate | I | III | III | III | III |
| Metropolitan Denver Intrastate | I | III | III | I | I |
| Comanche Intrastate | III | III | III | III | III |
| San Isabel Intrastate | I | III | III | III | III |
| San Luis Intrastate | III | III | III | III | III |
| Four Corners Interstate | IA | IA | III | III | III |
| Grand Mesa Intrastate | III | III | III | III | III |
| Yampa Intrastate | III | III | III | III | III |
[37 FR 10855, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 44 FR 57409, Oct. 5, 1979; 74 FR 47891, Sept. 18, 2009]
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