Jump to main content or area navigation.

Contact Us

Area Designations for 1997 Fine Particle (PM2.5) Standards

1997 PM2.5 Standards — Region 10 State Designations

Boundary Designations for the 1997 PM2.5 Standard - EPA Region 10

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

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

Jump to main content.