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 Oregon Department of Environmental Quality

Air Quality

Maintenance and nonattainment areas 

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Maintenance areas 

Maintenance areas are those geographic areas that had a history of nonattainment, but are now consistently meeting the National Ambient Air Quality Standard (NAAQS). Maintenance areas have been re-designated by the U.S. Environmental Protection Agency (EPA) from "nonattainment" to "attainment with a maintenance plan," or designated by the Environmental Quality Commission. Legal descriptions of these areas are listed in Oregon Administrative Rules, Chapter 340, Division 204-0010.

Maintenance areas in Oregon

*E-mail Air Quality Info for copies of Grants Pass M.P. Appendices
**Subject to finalization only after approved by the U.S. EPA under the federal Clean Air Act as a revision of the State Implementation Plan.
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For more information about Air Quality call 503-229-5359 or .

Oregon Department of Environmental Quality
Headquarters: 811 Sixth Ave., Portland, OR 97204-1390
Phone: 503-229-5696 or toll free in Oregon 1-800-452-4011
Oregon Telecommunications Relay Service: 1-800-735-2900  FAX: 503-229-6124

The Oregon Department of Environmental Quality is a regulatory agency authorized to protect Oregon's environment by
the State of Oregon and the Environmental Protection Agency.

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