C.F.R. » Title 40 » CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY › SUBCHAPTER C—AIR PROGRAMS › PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS › Subpart E—Arkansas

40 C.F.R. § 52.171

Classification of regions

Read at: eCFRecfr.gov CornellLII GovInfogovinfo.gov CasesGoogle Scholar

The Arkansas plan was evaluated on the basis of the following classifications:

Air quality control regionPollutant
Particulate matterSulfur oxidesNitrogen dioxideCarbon monoxideOzone
Central Arkansas IntrastateIIIIIIIIIIIIII
Metropolitan Fort Smith InterstateIIIIIIIIIIIIII
Metropolitan Memphis InterstateIIIIIIIIIII
Monroe (Louisiana)-El Dorado (Arkansas) InterstateIIIIIIIIIIIIII
Northeast Arkansas IntrastateIIIIIIIIIIIIIII
Northwest Arkansas IntrastateIIIIIIIIIIIIIII
Shreveport-Texarkana-Tyler InterstateIIIIIIIIIIIIII
[37 FR 10850, May 31, 1972, as amended at 39 FR 16346, May 8, 1974; 45 FR 6571, Jan. 29, 1980]