40 C.F.R. § 49.10705
Classification of regions for episode plans
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 |