1. Regulations
  2. title 40
  3. chapter I-i4
  4. part 52
  5. subpart QQ
  6. § 52.2171

View all text of Subpart QQ [§ 52.2170 - § 52.2186]

§ 52.2171 - Classification of regions.

The South Dakota plan evaluated on the basis of the following classifications:

Air quality control region Pollutant Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Photochemical oxidants (hydrocarbons) Metropolitan Sioux City InterstateIIIIIIIIIIIIIII Metropolitan Sioux Falls InterstateIIIIIIIIIIIIII Black Hills—Rapid City IntrastateIIIIIIIIIIIIIII South Dakota IntrastateIIIIIIIIIIIIIII
[37 FR 10893, May 31, 1972]

CITE AS: 40 CFR 52.2171