40 CFR § 49.9895
Classification of regions for episode plans
June 9, 2020
The air quality control region which encompasses the Chehalis Reservation 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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