Regulations last checked for updates: Nov 25, 2024

Title 40 - Protection of Environment last revised: Nov 21, 2024
All TitlesTitle 40Chapter IPart 49Subpart M - Subpart M—Implementation Plans for Tribes—Region X
View all text of Subpart M [§ 49.9861 - § 49.17810]
§ 49.9895 - Classification of regions for episode plans.

The air quality control region which encompasses the Chehalis Reservation is classified as follows for purposes of episode plans:

Pollutant Classification
Carbon monoxideIII
Nitrogen dioxideIII
OzoneIII
Particulate matter (PM10)II
Sulfur oxidesII
authority: 42 U.S.C. 7401,
source: 63 FR 7271, Feb. 12, 1998, unless otherwise noted.
cite as: 40 CFR 49.9895
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