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]