8-Hour Ozone (1997) Nonattainment Area Summary with History

As of December 14, 2012
All populations are updated for the 2010 census.

	NUMBER OF AREAS				NUMBER OF COUNTIES				2010 POPULATION
	Original	Adjusted			Original	Adjusted			Original	Adjusted
Classification	2004	2004	Today	Redesignated	2004	2004	Today	Redesignated	2004	2004	Today	Redesignated

Extreme	0	2	2	0	0	12	12	0	0	19,561,413	19,561,413	0
Severe 17	1	0	0	0	4	0	0	0	15,718,827	0	0	0
Severe 15	0	4	4	0	0	17	17	0	0	9,429,685	9,429,685	0
Serious	3	3	3	0	15	16	16	0	6,511,922	9,707,337	9,707,337	0
Moderate	30	30	23	7	185	182	145	37	87,026,630	77,399,716	61,174,621	16,225,095
Marginal	7	18	9	9	55	77	37	40	15,252,289	27,258,053	18,373,638	8,884,415

SUBTOTALS:	41	57	41	16	255	298	221	77	124,509,668	143,356,204	118,246,694	25,109,510

Former Subpart 1	71	56	0	56	172	136	0	136	37,634,461	22,506,809	0	22,506,809

SUBTOTALS:	71	56	0	56	172	136	0	136	37,634,461	22,506,809	0	22,506,809

Marginal EAC	1	0	0	0	8	0	0	0	1,412,199	0	0	0
Subpart 1 EAC	13	0	0	0	41	0	0	0	9,486,189	0	0	0

SUBTOTALS:	14	0	0	0	49	0	0	0	10,898,388	0	0	0


GRAND TOTALS:	126	113	41	72	474	434	221	213	173,042,517	165,863,013	118,246,694	47,616,319

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

See adjustments to original 2004 nonattainment areas or this report based on 2000 populations.

The Greensboro EAC area was reclassified from Moderate EAC to Marginal EAC on November 2004. This table reflects the original area status after the reclassfication to Marginal EAC. Based on air quality data from 2005, 2006 and the first three quarters of 2007, the Denver CO Subpart 1 EAC area was designated nonattainment for 8-hour Ozone, effective November 20, 2007. The remaining thirteen (13) 8-Hr EAC areas were designated attainment on April 15, 2008.

On June 8, 2007, the United States Court of Appeals vacated the Subpart 1 portion of the Phase 1 Rule (Court Order) (PDF). On May 14, 2012, the Former Subpart 1 nonattainment areas were classified under Subpart 2 (77 FR 28424 (PDF)), effective June 13, 2012.

Go Top