§ 52.471. Classification of regions.
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/us/cfr/t40/s§ 52.471·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
The District of Columbia plan was evaluated on the basis of the following classifications: Air quality control region Pollutant Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone National Capital InterstateIIIIIII [37 FR 10857, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 46 FR 61263, Dec. 16, 1981]
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§ 52.471
Classification of regions.
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