40 C.F.R. § 52.2471

Current through May 31, 2024

Section 52.2471 - Classification of regions

The Washington plan was evaluated on the basis of the following classifications:

Air quality control region	Pollutant
	Particulate matter	Sulfur oxides	Nitrogen dioxide	Carbon monoxide	Ozone
Eastern Washington-Northern Idaho Interstate	I	IA	III	III	III
Northern Washington Intrastate	II	III	III	III	III
Olympic-Northwest Washington Intrastate	II	II	III	III	III
Portland Interstate	I	IA	III	III	III
Puget Sound Intrastate	I	IA	III	III	I
South Central Washington Intrastate	I	III	III	III	III

40 C.F.R. §52.2471

81 FR 1131, Jan. 11, 2016