40 C.F.R. § 52.1171

Current through September 30, 2024

Section 52.1171 - Classification of regions

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

Air quality control region	Pollutant
	Particulate matter	Sulfur oxides	Nitrogen dioxide	Carbon monoxide	Ozone
Metropolitan Detroit-Port Huron Intrastate	I	I	III	III	III
Metropolitan Toledo Interstate	I	I	III	III	I
South Central Michigan Intrastate	II	II	III	III	III
South Bend-Elkhart (Indiana)-Benton Harbor (Michigan) Interstate	I	IA	III	III	III
Central Michigan Intrastate	II	III	III	III	III
Upper Michigan Intrastate	III	III	III	III	III

40 C.F.R. §52.1171

37 FR 10873, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 45 FR 29801, May 6, 1980