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Previous 1-Hour Ozone Nonattainment Area Summary with History

As of June 15, 2005


                          NUMBER OF AREAS                     NUMBER OF COUNTIES                      2000 POPULATION (1000s)
                Original Adjusted                   Original Adjusted                     Original   Adjusted
Classification    1991    1991   Today Redesignated   1991    1991   Today Redesignated     1991      1991      Today   Redesignated
====================================================================================================================================
Extreme             1      2       2       0            4     12      12       0           13,000    17,783    17,783         0
Severe (2007)       5      6       6       0           52     51      51       0           31,683    35,420    35,420         0
Severe (2005)       4      7       6       1           22     61      48      13           11,525    20,434    16,735     3,699
Serious            14     13       8       5           86     50      38      12           22,724    24,961    16,125     8,836
Moderate           31     29       5      24          113     95      12      83           40,176    29,742     1,737    28,005
Marginal           42     43      18      25           89     90      38      52           19,533    21,529     6,884    14,645
Other               1      2       1       1            5     14       9       5            1,362     8,064     6,542     1,522

   SUBTOTALS:      98    102      46      56          371    364     199     165          140,003   157,933   101,226    56,707

Section 185A       12     11       3       8           23     21       4      17            5,151     5,466       459     5,007
Incomplete Data    47     23      14       9           50     26      15      11            3,755     2,182     1,260       922

   SUBTOTALS:      59     34      17      17           73     47      19      28            8,906     7,648     1,719     5,929

====================================================================================================================================
 GRAND TOTAL:     157    136      63      73          444    410     217     193          148,909   165,581   102,945    62,636


* See attached adjustments to original 1991 nonattainment areas. 
County subtotals and grand totals may not equal sum of parts.  Part counties are only counted one time within groups.
"Section 185A" was previously called "Transitional".  The Ohio portion of the Youngstown-Warren-Sharon OH-PA area
is a maintenance area, while the Pennsylvania portion remains nonattainment.  The redesignated area column of this
report does not include the partially redesignated areas.                                                                    

78 FR 58189, effective 10/23/2013, corrected a boundary for the land of the Morongo Band of Mission Indians, 
located near Banning Pass in Riverside County, identifying it as a separately designated area for the 
one-hour Ozone standard, independent of the Los Angeles-South Coast Air Basin Area.

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