The air quality control region which encompasses the Fort Hall Indian Reservation is classified as follows for purposes of episode plans:
| Pollutant | Classification | 
|---|---|
| Carbon monoxide | III | 
| Nitrogen dioxide | III | 
| Ozone | III | 
| Particulate matter (PM10) | I | 
| Sulfur oxides | II | 
[70 FR 18125, Apr. 8, 2005]