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

40 C.F.R. § 52.1771

Classification of regions

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The North Carolina plan was evaluated on the basis of the following classifications:

Air quality control regionPollutant
Particulate matterSulfur oxidesNitrogen dioxideCarbon monoxidePhotochemical oxidants (hydrocarbons)
Western Mountain IntrastateIIIIIIIIIIIII
Eastern Mountain IntrastateIIIIIIIIIIIII
Metropolitan Charlotte InterstateIIIIIIIIII
Northern Piedmont IntrastateIIIIIIIIIIIII
Eastern Piedmont IntrastateIIIIIIIIIIIII
Northern Coastal IntrastateIIIIIIIIIIIII
Southern Coastal IntrastateIIIIIIIIIIIIII
Sandhills IntrastateIIIIIIIIIIIIII
[37 FR 10884, May 31, 1972]