40 C.F.R. § 49.9955
Current through October 31, 2024
The air quality control region which encompasses the Colville Reservation is classified as follows for purposes of episode plans:
| Pollutant | Classification |
| Carbon monoxide | III |
| Nitrogen dioxide | III |
| Ozone | III |
| Particulate matter (PM10) | II |
| Sulfur oxides | III |
40 C.F.R. §49.9955