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Area Designations for 1997 Ground-level Ozone Standards

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

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

Map showing designations for region 8 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). Also, some counties are participating in an early action compact. These are identified as EAC. If a county is not listed below, EPA has designated it as unclassifiable/attainment. The redesignation request section of this site contains a table of redesignated areas and links to the related Federal Register documents.

State
Nonattainment Area Name
Counties
April 15, 2004 Classification
Maximum
Attainment Date
(from June 15, 2004)
Current/Proposed Classification Resdesignation Effective Date
Colorado
Denver-Boulder-Greeley-Ft. Collins, CO (EAC)
Map (PDF) (2 pp, 73KB)
Adams
Arapahoe
Boulder
Broomfield
Denver
Douglas
Jefferson
Larimer (P)
Weld (P)
(EAC) Dec 2007 Former Subpart 1
-
Montana
entire state is attainment
North Dakota entire state is attainment
South Dakota entire state is attainment
Utah entire state is attainment
Wyoming entire state is attainment

Region 8 Recommendations and EPA Responses

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