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.
| 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 |