Designated 1997 PM-2.5 Nonattainment Areas Compared to 2006 PM-2.5 and 1997 8-Hr Ozone Nonattainment Areas

As of August 30, 2011

Mouse over the No. Ctys to see the area name; click on them to see the associated counties. [Split] in No. Ctys column explained here.

		1997 PM-2.5 Nonattainment Areas				2006 PM-2.5 Nonattainment Areas				1997 8-Hr Ozone Nonattainment Areas
State(s)	Area Name	2000 Pop.	No. Ctys	Category/ Class	Annual Design Value	2000 Pop.	No. Ctys	Class	24-hr Design Value (2006-2008)	2000 Pop.	No. Ctys	Class	Design Value (2001-2003)
AL	Birmingham	807,612	3	NonAtt	18.0	807,612	3	NonAtt	39
AL-TN-GA	Chattanooga	423,809	4	NonAtt	16.1
CA	Los Angeles-South Coast Air Basin	14,593,587	4	NonAtt	27.8	14,593,587	4	NonAtt	49	14,593,587	4	Ext	0.131
CA	San Joaquin Valley	3,191,367	8	NonAtt	21.8	3,191,367	8	NonAtt	70	3,191,367	8	Ext	0.115
DC-MD-VA	Washington	4,377,935	14	NonAtt	15.8					4,452,498	15	Mod	0.099
GA	Atlanta	4,231,750	22	NonAtt	18.0					4,228,492	20	Mod	0.091
GA	Macon	154,837	2	NonAtt	15.2
GA	Rome, GA	90,565	1	NonAtt	15.7
IL-IN	Chicago-Gary-Lake County	8,757,808	10	NonAtt	17.7					8,757,808	10	Mod	0.101
IN	Evansville	277,402	6	NonAtt	16.2
IN	Indianapolis	1,329,185	5	NonAtt	16.7
KY-IN	Louisville	938,905	5	NonAtt	16.9
MD	Baltimore	2,512,431	6	NonAtt	16.7					2,512,431	6	Mod	0.103
MI	Detroit-Ann Arbor	4,833,493	7	NonAtt	19.5	4,833,493	7	NonAtt	37
MO-IL	St. Louis	2,486,562	9	NonAtt	17.5					2,504,603	9	Mod	0.092
MT	Libby	2,626	1	NonAtt	16.2
NC	Greensboro-Winston-Salem-High Point	568,294	2	NonAtt	15.8
NC	Hickory	141,685	1	NonAtt	15.5
NY-NJ-CT	New York	19,802,587	22	NonAtt	17.7	19,802,587	22	NonAtt	38	19,634,122	24	Mod	0.102
OH	Canton-Massillon	378,098	1	NonAtt	17.3	378,098	1	NonAtt	See Design Value Notes
OH	Cleveland-Akron-Lorain	2,775,447	7	NonAtt	18.3	2,752,208	6	NonAtt	38
OH	Columbus	1,448,503	5	NonAtt	16.7
OH	Dayton-Springfield	851,690	3	NonAtt	15.2
OH-KY-IN	Cincinnati-Hamilton	1,850,975	8	NonAtt	17.8
OH-WV	Steubenville-Weirton	132,008	3	NonAtt	17.8	132,008	3	NonAtt	41
PA	Harrisburg-Lebanon-Carlisle	585,799	3	NonAtt	15.8	967,550	4	NonAtt	36
PA	Johnstown	164,431	2	NonAtt	15.8	164,514	2	NonAtt	See Design Value Notes
PA	Lancaster	470,658	1	NonAtt	17.0	470,658	1	NonAtt	37
PA	Pittsburgh-Beaver Valley	21,600	1	NonAtt	21.2	21,519	1	NonAtt	53
PA		2,195,054	8	NonAtt	21.2	2,195,156	8	NonAtt	36	2,431,087	7	Subpar	0.094
PA	Reading	373,638	1	NonAtt	16.4
PA	York	381,751	1	NonAtt	17.3
PA-NJ-DE	Philadelphia-Wilmington									7,333,475	18	Mod	0.106
PA-NJ-DE		5,536,911	9	NonAtt	16.4	5,536,911	9	NonAtt	36
TN	Knoxville	599,008	5	NonAtt	16.8	599,009	5	NonAtt	See Design Value Notes
WV	Charleston	251,662	2	NonAtt	17.1	251,662	2	NonAtt	36
WV-KY-OH	Huntington-Ashland	340,776	9	NonAtt	17.2
WV-MD	Martinsburg - Hagerstown	207,828	2	NonAtt	16.3
WV-OH	Parkersburg-Marietta	152,912	3	NonAtt	16.0
WV-OH	Wheeling	153,172	3	NonAtt	15.7

Area Name:

The "State(s) Area Name" column contains a common or general name for the nonattainment areas on the row, but may not reflect the exact name of any area on the row. This column cannot be exact since the nonattainment area for one pollutant may not contain the same counties, cities, or states as the nonattainment area for another pollutant on the same row. to see the area name or click on them to see the associated counties. The abbreviations listed in the "State(s)" column reflect all states identified in row. However, some states on a row may be nonattainment for some pollutants and not for others in the general area.

Split Area:

'Split' in the No. Ctys column indicates that the multi-state area has states that have been redesignated but the area does not become a maintenance area until all states in the area are redesignated. Clicking on a "Split" No. Ctys will display information for the state(s) that have not been redesignated.

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