§ 52.1821 - Classification of regions.

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§ 52.1821 Classification of regions.

The North Dakota 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 Fargo-Moorhead Interstate	II	III	III	III	III
North Dakota Intrastate	II	III	III	III	III

[37 FR 10885, May 31, 1972]

                    
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