Maintenance areas 

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.

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

Maintenance areas in Oregon

• Eugene-Springfield Air Quality Maintenance Area for Carbon Monoxide
• Under authority of the Lane Regional Air Protection Agency (LRAPA). Contact LRAPA for information on this area.

The Eugene-Springfield area is being considered for a change to a PM₁₀ Maintenance Area, and being redesignated 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 December 15-16, 2011 meeting of the Environmental Quality Commission. If approved, DEQ and LRAPA will submit a redesignation request to the Environmental Protection Agency.

• Grants Pass Central Business District Maintenance area for Carbon Monoxide and Urban Growth Boundary Maintenance area for PM₁₀
• Grants Pass Maintenance Plan for Carbon Monoxide PDF* 1.6mb
• Grants Pass Maintenance Plan for PM₁₀ PDF* 2.5mb
• Map PDF
• Klamath Falls Urban Growth Boundary Maintenance area for Carbon Monoxide and PM₁₀
• Map PDF
• Maintenance Plan
• La Grande Air Quality Maintenance area
• Maintenance Plan
• Lakeview Air Quality Maintenance area
• Maintenance Plan
• Medford-Ashland Area
• Maintenance Plan
• Medford Area
• Medford Urban Growth Boundary map JPG
• Maintenance Plan for CO PDF
• Portland-Vancouver and Salem-Keizer Area
• Maintenance Plans
• Portland-Vancouver and Salem-Keizer Area Ozone Maintenance Plan PDF
• Portland Area Carbon Monoxide Maintenance Plan PDF 1.7mb
• Salem-Keizer Carbon Monoxide Maintenance Plan PDF
• Maps
• Portland-Vancouver area Ozone Map PDF 1.7mb
• Portland area CO Map PDF
• Salem-Keizer area Map (for Ozone and CO) PDF
• Other references
• 2000 2030 regional forecast PDF 1.5mb
• 1992 to 2005 meteorological trends PDF
• WSU Portland SIP Report PDF 2mb
• Industrial Growth Allowance

*E-mail Air Quality Info for copies of Grants Pass M.P. Appendices

Geographic Information System (GIS)

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