>Air Quality Division: Plans: State Implementation Plan (SIP) Capsules

The State Implementation Plans (SIP)s include nonattainment area plans, maintenance or limited maintenance plans, and control measure plans. The SIP capsules are for areas that currently have plans in development, are in the public process phase, or are final and have been submitted to the U.S. EPA Region IX. For SIPs in the development phase, the capsules contain information regarding stakeholder meetings and relevant background information. For SIPs in the public process phase, the capsules contain information regarding public hearings and comment periods. For prior SIP submittals for a given area please contact the Planning Section, (602) 771-2373.

Map of Nonattainment & Attainment Areas


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Interactive GIS eMaps

Proposed SIPs and SIPs in Development


Eight-Hour Ozone Plan for the Maricopa Nonattainment Area (2008 Standard)
Contact: Bruce Friedl - (602) 771-2259
Summary: On March 12, 2008, the U.S. EPA revised the 8-Hour "primary" ozone standard to a level of 0.075 parts per million (ppm). States were required to make recommendations to the U.S. EPA no later than March 31, 2009, for areas to be designated attainment, nonattainment, and unclassifiable. On March 12, 2009, the Governor submitted recommendations for the 8-Hour ozone nonattainment area boundaries. Revised boundary recommendations were submitted to the U.S. EPA in December 2011. The U.S. EPA completed area designations for the 2008 ozone standards effective July 20, 2012. Please visit 8-Hour Ozone for the boundary recommendations and the U.S. EPA's designations. The U.S. EPA proposed a rule on the Implementation of the 2008 National Ambient Air Quality Standards for Ozone: State Implementation Plan Requirements on June 6, 2013, including Marginal Area Plans. The Maricopa Association of Governments is responsible for development of the Marginal Area Plans for the Maricopa Nonattainment Area.
Submittal Deadline: July 20, 2014
Informational Links: U.S. EPA: Ground-level Ozone: Regulatory Actions
Maricopa Association of Governments Environmental Programs
Plan Development Activities:
Proposed Plan:
Open of Comment Period:
Close of Comment Period:
Public Hearing:
Final Plan Submittal:
Final Plan Submittal Date:
U.S. EPA Action: Pending

Agricultural Best Management Practices (BMP) - Maricopa County PM10 Serious Area State Implementation Plan Revision
Contact: Lisa Tomczak - (602) 771-4450
Summary: The Maricopa County PM10 Serious Area failed to attain the NAAQS by the U.S. EPA's deadline of December 31, 2006. As a result of the Failure to Attain, the Maricopa Association of Governments (MAG) prepared a Five Percent Plan for Maricopa County as required under the Clean Air Act Section 189(d), which requires PM10 emissions to be reduced by five percent every subsequent year until the standard is attained, and that no violations occur at previously violating PM10 monitors. One such emission control measure adopted by the Legislature in 2007 and included in the plan enhanced the BMP requirements. ADEQ is currently revising the implementation plan for BMP to reduce PM10 from agricultural activities. The revision will account for legislative changes and additional best management practices adopted by the Governor's Agricultural Best Management Practices Committee.
Submittal Deadline: No legal deadline; tentative submittal December 2011.
Informational Links Arizona Department of Agriculture: Agricultural Consultation and Training Program
ADEQ: Agricultural Best Management Practices
Plan Development Activities Governor's Agricultural Best Management Practices Committee to review SIP revision prior to comment period.
Proposed Plan
Open of Comment Period
Close of Comment Period
Public Hearing
Final Plan Submittal
Final Plan Submittal Date
U.S. EPA Action

Arizona Cleaner Burning Gasoline Program
Contact: John Englander - (602) 771-4781
Summary: The Arizona Cleaner Burning Gasoline (CBG) program is a control measure introduced to reduce pollution from mobile sources in the Maricopa County metropolitan area and is relied on to aid the area in the reduction of ozone, carbon monoxide (CO), and particulate matter (PM) formation. This State Implementation Plan (SIP) revision provides an update of the Arizona CBG Program for federal approval and requests incorporation of Arizona’s revised CBG related statutes and rules into the Arizona SIP.
Informational Links 2004 Federal Action on the Arizona CBG Program
Proposed Plan 2013 Update to the Arizona State Implementation Plan for the Cleaner Burning
Open of Comment Period May 22, 2013
Close of Comment Period June 21, 2013
Public Hearing Friday, June 21, 2013, 2:30 p.m., ADEQ, Mail Office, Conference Room 145, 1110 W. Washington St., Phoenix, AZ
Final Plan Submittal
Final Plan Submittal Date
U.S. EPA Action

Douglas-Paul Spur PM10
Contact: Lisa Tomczak - (602) 771-4450
Summary The Douglas-Paul Spur Area was designated and classified as a moderate PM10 nonattainment area upon enactment of the 1990 CAAA as a result of monitoring violations of the PM10 NAAQS. ADEQ submitted a SIP for the Douglas portion of the nonattainment area in April 1993 and for the Paul Spur portion in July 1990; the U.S. EPA found the Douglas SIP to be complete, but did not act on the Paul Spur SIP. On January 11, 2011, the U.S. EPA Region IX issued a Clean Data Finding for the Douglas-Paul Spur Nonattainment Area based on ambient monitoring data from 1992-1994 that demonstrated the area reached attainment of the PM10 NAAQS by the deadline established by the 1990 CAAA.

The Center of Biological Diversity sued U.S. EPA on April 29, 2010, for failure to act on the Douglas-Paul Spur SIP and attainment determination for Clean Air Act deadlines. The deadline for a Federal Implementation Plan (FIP) is July 27, 2012, unless U.S. EPA approves a SIP provision. ADEQ is currently developing an update to the SIPs submitted to the U.S. EPA in 1993 and 1990.
Submittal Deadline Spring 2012
Informational Links Determination of Attainment by Attainment Deadline (76 FR 1532, effective February 10, 2011)
Final PM10 State Implementation Plan for the Paul Spur Group I Area (July 1990)
State Implementation Plan for the Douglas PM10 Nonattainment Area (April 1993)
Center for Biological Diversity vs. Jackson Consent Decree
Plan Development Activities Upon completion of SIP development activities, stakeholder meeting(s) will be conducted, culminating in a formal public notice and comment period and a public hearing prior to submittal of the plan to the U.S. EPA.
Proposed Plan
Open of Comment Period
Close of Comment Period
Public Hearing
Final Plan Submittal
Final Plan Submittal Date
U.S. EPA Action