40 C.F.R. § 52.1321

Classification of regions

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The Missouri plans were 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 Kansas City Interstate	I	III	III	I	I
Southwest Missouri Intrastate	I	III	III	III	III
Southeast Missouri Intrastate	III	III	III	III	III
Northern Missouri Intrastate	II	III	III	III	III
Metropolitan St. Louis Interstate	I	I	III	I	I

[37 FR 10875, May 31, 1972, as amended at 39 FR 16347, May 8, 1974]

Notes of Decisions

Cited in 1 case, 1976–1976 · leading case: Union Elec. Co. v. Env't Prot. Agency, 427 U.S. 246 (1976).

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Union Elec. Co. v. Env't Prot. Agency, 427 U.S. 246 (1976). · cites it 2× “Louis Interstate region, 40 CFR § 52.1321 (1975)the Missouri plan concentrated on a control strategy and regulations to lower emissions in that area.”

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