§ 52.1171. Classification of regions.
70 words·~1 min read·
/us/cfr/t40/s§ 52.1171·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
The Michigan plan was evaluated on the basis of the following classifications: Air quality control region Pollutant Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Ozone Metropolitan Detroit-Port Huron IntrastateIIIIIIIIIII Metropolitan Toledo InterstateIIIIIIIII South Central Michigan IntrastateIIIIIIIIIIIII South Bend-Elkhart (Indiana)-Benton Harbor (Michigan) InterstateIIAIIIIIIIII Central Michigan IntrastateIIIIIIIIIIIIII Upper Michigan IntrastateIIIIIIIIIIIIIII [37 FR 10873, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 45 FR 29801, May 6, 1980]