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Phoenix Carbon Monoxide Actions
January 2005: Final Redesignation for Carbon Monoxide
On January 5, 2005, EPA finalized the rule to redesignate the Phoenix metropolitan area in Arizona to attainment for the National Ambient Air Quality Standard (NAAQS) for carbon monoxide (CO), as well as to approve the attainment demonstration and maintenance plan showing maintenance of the CO standard through 2015. EPA also finalized a boundary change which removes the Gila River Indian Community (GRIC) from the Phoenix CO maintenance area.
The Phoenix metropolitan area was originally designated as a moderate CO nonattainment area under the Clean Air Act Amendments of 1990, with an attainment date of December 31, 1995. As a result of the area's failure to reach attainment by the end of 1995, EPA reclassified the area as a serious nonattainment area in 1996, with a new attainment date of December 31, 2000. The Phoenix metropolitan area has not had an exceedance of the CO standard since 1996. The area has been reporting clean data for CO for more than seven years. Cars and other gasoline-powered motor vehicles cause more than 75 percent of the Valley's CO.
The State and local community have worked hard to improve Phoenix's air quality. The area has a number of innovative programs including the country's leading vehicle emissions inspection program, a cleaner burning gasoline program, and woodburning restrictions. The proposed revisions to the State Implementation Plan (SIP) will mean continued clean air for the Phoenix area.
- Press release (January 5, 2005)
- Federal Register Notice (March 9, 2005)
Contact Information
Wienke Tax (tax.wienke@epa.gov)
Office of Air Planning
EPA Region 9
(520) 622-1622
September 2004: Proposed Redesignation for Carbon Monoxide
The above actions were proposed on September 21, 2004
- Press release (September 22, 2004)
- Federal Register Notice (October 8, 2004)
Contact Information
Wienke Tax (tax.wienke@epa.gov)
Office of Air Planning
EPA Region 9
(520) 622-1622
September 2003: Final Finding of Attainment for Carbon Monoxide
On September 9, 2003, EPA finalized its finding of attainment for the Phoenix area for the carbon monoxide national air quality health standard.
- Federal Register Notice (September 22, 2003)
- Technical Support Document (PDF) (August 2003) (10 pp, 74K, About PDF)
Contact Information
Wienke Tax (tax.wienke@epa.gov)
Office of Air Planning
EPA Region 9
(520) 622-1622