40 C.F.R. § 49.10255
Classification of regions for episode plans
The air quality control region which encompasses the Reservation of the Kootenai Tribe of Idaho 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 | III |