40 C.F.R. § 52.421

Current through May 31, 2024

Section 52.421 - Classification of regions

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

Air quality control region	Pollutant
	Particulate matter	Sulfur oxides	Nitrogen dioxide	Carbon monoxide	Photochemical oxidants (hydrocarbons)
Metropolitan Philadelphia Interstate	I	I	III	I	I
Southern Delaware Intrastate	III	III	III	III	III

40 C.F.R. §52.421

37 FR 10856, May 31, 1972, as amended at 39 FR 16345, May 8, 1974