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Green Book Nonattainment Areas

1-Hour Ozone (1979) Nonattainment Area Summary - NAAQS Revoked

As of June 15, 2005


Classification Number of Areas Number of Counties 2000 Population
(1000s)
Extreme 2 12 17,783
Severe (2007) * 6 51 35,420
Severe (2005) 6 48 16,735
Serious 8 38 16,125
Moderate 5 12 1,737
Marginal 18 38 6,884
Other 1 9 6,542
 
SUBTOTAL 46 199 101,226
 
Section 185A 3 4 459
Incomplete Data 14 15 1,260
 
SUBTOTAL 17 19 1,719
 
GRAND TOTAL 63 217 102,945

* 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 Severe-17 area for the 1-Hour Ozone standard, independent of the Los Angeles-South Coast Air Basin Area.

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

"Section 185A" was previously called "Transitional".

The former 1-Hour Ozone designations and classifications as of June 15, 2004, are being retained in subpart C of Part 81 for purposes of the anti backsliding provisions of 40 CFR 51.905. 40 CFR 51.905(c) references subpart C of part 81 for the areas affected by the anti-backsliding regulation.


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