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Area Designations for 1997 Ground-level Ozone Standards

Region 10: State Designations for the 1997 8-Hour Ozone Standard

Boundary Designations for the 1997 8-Hour Ozone Standard - EPA Region 10
(as of September 18, 2009)

Map showing designations for region 10 map legend

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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. See also the table of redesignated areas.

Nonattainment Area Name
April 15, 2004 Classification
Attainment Date
(from June 15, 2004)
Current/Proposed Classification Resdesignation Effective Date
entire state is attainment
Idaho entire state is attainment
Oregon entire state is attainment
Washington entire state is attainment

Region 10 Recommendations and EPA Responses

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