1997 PM_2.5 Standards — Region 9 State Designations

Note: EPA no longer updates this information, but it may be useful for historical purposes. See the PM Designations Home Page for more recent information about PM Designations.

Boundary Designations for the 1997 PM_2.5 Standard - EPA Region 9

Map showing PM2.5 designations for 1997 standard for 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
Arizona	Entire state is attainment/unclassifiable
California*	Los Angeles-South Coast Air Basin, CA	Los Angeles (P) Orange Riverside (P) San Bernardino(P)
California*	San Joaquin Valley, CA	Fresno Kern (P) Kings Madera Merced San Joaquin Stanislaus Tulare
Hawaii	Entire state is attainment/unclassifiable
Nevada	Entire state is attainment/unclassifiable

*See correspondence related to the April, 2005 supplemental notice for information about changes to designations since the December, 2004 action.

Region 9 Recommendations and EPA Responses

1997 PM2.5 Standards — Region 9 State Designations

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1997 PM_2.5 Standards — Region 9 State Designations