§ 52.671. Classification of regions.
61 words·~1 min read·
/us/cfr/t40/s§ 52.671·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
The Idaho plan was evaluated on the basis of the following classifications: Air quality control region Pollutants Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone Eastern Idaho IntrastateIIIIIIIIIIII. Eastern Washington Northern Idaho Interstate (Idaho)IIIIIIIIIIII. Idaho IntrastateIIIIIIIIIIIII. Metropolitan Boise IntrastateIIIIIIIIIIII. [37 FR 10861, May 31, 1972, as amended at 45 FR 70261, Oct. 23, 1980; 47 FR 32534, July 28, 1982]