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Oregon Department of Environmental Quality

Air Quality

Maintenance and Nonattainment Areas 

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Maintenance Areas in Oregon 

Maintenance areas are 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.

Air Quality maintenance area
(Click to enlarge) Oregon map for air quality maintenance areas.

Eugene-Springfield Air Quality Maintenance Area for Carbon Monoxide

The Eugene-Springfield area is being considered for a change to a PM10 Maintenance Area, and being re-designated as in "attainment" with the PM10 air quality health standard. A public hearing on this proposed change was held by the Lane Regional Air Protection Agency (LRAPA) on September 26, 2011, and a decision is expected at the December15-16, 2011 meeting of the Environmental Quality Commission. If approved, DEQ and LRAPA will submit a re-designation request to the Environmental Protection Agency.

Grants Pass Central Business District Maintenance area for Carbon Monoxide and Urban Growth Boundary Maintenance area for PM10

Klamath Falls Urban Growth Boundary Maintenance area for Carbon Monoxide and PM10

La Grande Air Quality Maintenance area

Lakeview Air Quality Maintenance area

Medford-Ashland Area

Medford Area

Portland-Vancouver and Salem-Keizer Area

Maintenance Plans

Maps

Other References

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For more information about Air Quality call 503-229-5359 or email.

Oregon Department of Environmental Quality
Headquarters: 811 SW 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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