Area Designations for 1997 Fine Particle (PM2.5) Standards
1997 PM2.5 Standards — Region 9 State Designations
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Boundary Designations for the 1997 PM2.5 Standard - EPA Region 9


This table identifies all counties EPA has designated as nonattainment. In some cases EPA designated partial counties. These are identified by a (P). If a county is not listed below, EPA has designated it as unclassifiable/attainment.
State | Area Name | Counties |
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Arizona | Entire state is attainment/unclassifiable | |
California* | Los Angeles-South Coast Air Basin, CA | Los Angeles (P) Orange Riverside (P) San Bernardino(P) |
San Joaquin Valley, CA | Fresno Kern (P) Kings Madera Merced San Joaquin Stanislaus Tulare |
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Hawaii | Entire state is attainment/unclassifiable | |
Nevada | Entire state is attainment/unclassifiable |