40 CFR 52.1421 - Classification of regions.

Regulations last checked for updates: Nov 24, 2024

Title 40 - Protection of Environment last revised: Nov 21, 2024

§ 52.1421 - Classification of regions.

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

Air quality control region	Pollutant
Air quality control region	Particulate matter	Sulfur oxides	Nitrogen dioxide	Carbon monoxide	Photochemical oxidants (hydrocarbons)
Metropolitan Omaha-Council Bluffs Interstate	I	II	III	III	III
Lincoln-Beatrice-Fairbury Intrastate	II	III	III	III	III
Metropolitan Sioux City Interstate	III	III	III	III	III
Nebraska Intrastate	III	III	III	III	III

[37 FR 10877, May 31, 1972, as amended at 39 FR 16347, May 8, 1974]

authority: 42 U.S.C. 7401

cite as: 40 CFR 52.1421