The Maricopa Association of Governments was designated by the Governor of Arizona in 1978 and recertified by the Arizona Legislature in 1992 to serve as the Regional Air Quality Planning Agency for the Maricopa County nonattainment area. In accordance with this role, MAG develops regional air quality plans to address air pollution problems. In addition, MAG also conducts the air quality conformity analyses for transportation programs and plans to ensure that transportation activities do not cause air quality violations.
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Draft Technical Support Document in Support of the MAG 2017 Eight-Hour Ozone Moderate Area Plan for the Maricopa Nonattainment Area
Draft Ozone Modeling Protocol in Support of the MAG 2017 Moderate Area Plan for the Maricopa Eight-Hour Ozone Nonattainment Area (2008 Ozone Standard)
MAG 2014 SIP Revision for the Removal of Stage II Controls
MAG 2014 Eight-Hour Ozone Plan
MAG 2013 Carbon Monoxide Maintenance Plan
MAG 2012 Five Percent Plan for PM-10
MAG 2007 Five Percent Plan for PM-10
- MAG 2007 Five Percent Plan for PM-10 for the Maricopa County Nonattainment Area (52.9MB, PDF)
- Appendices, Volume 1 (52.9MB, PDF)
- Appendices, Volume 2 (11.8MB, PDF)
- Appendices, Volume 3 (39.7MB, PDF)
- Appendices, Volume 4 (54.1MB, PDF)
- Appendices, Volume 5 (19.5MB, PDF)
- Commitments for Implementation, Volume 1 (26.1MB, PDF)
- Commitments for Implementation, Volume 2 (52.9MB, PDF)
Final Eight-Hour Ozone Redesignation Request and Maintenance Plan
- Final Eight-Hour Ozone Maintenance Plan (PDF, 1.5 MB)
- Final Eight-Hour Ozone Maintenance Plan, Appendices, Volume One (PDF, 11.6 MB)
- Final Eight-Hour Ozone Maintenance Plan, Appendices, Volume Two (PDF, 10.5 MB)
- Final Eight-Hour Ozone Maintenance Plan, Appendices, Volume Three (PDF, 3.9 MB)
Eight-Hour Ozone Plan for the Maricopa Nonattainment Area
On June 15, 2004, the EPA designated a 4,880 square mile area located mainly in Maricopa and Pinal Counties as an eight-hour ozone nonattainment area. An eight-hour ozone plan for the Maricopa Nonattainment Area was submitted to the EPA by the June 15, 2007 deadline. The plan demonstrates that the eight-hour ozone standard will be met by the ozone season of 2008, with measures that have been implemented before the ozone season of 2008.
The plan uses photochemical modeling to show that the standard will be attained in 2008 with federal, state, and local control measures that have already been implemented in the region. The modeling results are supported by a downward trend in monitored ozone concentrations. As Figure ES-1 indicates, the eight-hour ozone standard has not been violated at any monitor in the Maricopa nonattainment area for the past two years (i.e., 2005 and 2006).
PM-10 Source Attribution and Deposition Study
PM-10 Exceedance Prevention Workshop Materials
MAG Regional Air Quality Modeling Program
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Meetings, Agendas and Minutes
Air Quality Planning Program Specialist: