8-Hour Ozone Maintenance Area Summary

As of August 30, 2011

	Number of		Population
Classification	Areas	Counties

Moderate	4	16	4,481,379
Marginal	9	40	8,712,140

SUBTOTAL:	13	56	13,193,519

Former Subpart 1	56	136	20,892,392

SUBTOTAL:	56	136	20,892,392


GRAND TOTAL:	69	192	34,085,911

County subtotals and grand totals may not equal sum of parts. Part counties are only counted one time within groupings.

Multi-state nonattainment areas are not considered maintenance areas until all states in the area have been redesignated.

On June 8, 2007, the United States Court of Appeals vacated the Subpart 1 portion of the Phase 1 Rule (Court Order). The Subpart 1 areas in the Greenbook are listed as "Former Subpart 1" until reclassification of the areas is finalized. Proposed reclassifications were published on January 16, 2009 74 FR 2936

8-Hour Ozone Maintenance Area Summary

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