40 CFR § 49.11045
Classification of regions for episode plans
June 9, 2020
The air quality control region which encompasses the Reservation of the Upper Skagit Indian Tribe is classified as follows for purposes of episode plans:
Open Table
| Pollutant | Classification |
|---|---|
| Carbon monoxide | III |
| Nitrogen dioxide | III |
| Ozone | III |
| Particulate matter (PM10) | II |
| Sulfur oxides | II |
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