1997 PM_2.5 Standards — Region 10 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 10

Map showing PM2.5 designations for 1997 standard for Region 10

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
Alaska	Entire state is attainment/unclassifiable
Idaho	Entire state is attainment/unclassifiable
Oregon	Entire state is attainment/unclassifiable
Washington	Entire state is attainment/unclassifiable

Region 10 Recommendations and EPA Responses

1997 PM2.5 Standards — Region 10 State Designations

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1997 PM_2.5 Standards — Region 10 State Designations