40 C.F.R. § 52.1221

Current through March 31, 2024

Section 52.1221 - Classification of regions

The Minnesota 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)
Central Minnesota Intrastate	II	III	III	III	III
Southeast Minnesota-La Crosse (Wisconsin) Interstate	II	Ia	III	III	III
Duluth (Minnesota)-Superior (Wisconsin) Interstate	I	II	III	III	III
Metropolitan Fargo-Moorhead Interstate	II	III	III	III	III
Minneapolis-St. Paul Intrastate	I	I	III	I	III
Northwest Minnesota Intrastate	II	III	III	III	III
Southwest Minnesota Intrastate	III	III	III	III	III

40 C.F.R. §52.1221

37 FR 10874, May 31, 1972, as amended at 39 FR 16346, May 8, 1974