SIP Program

What is Arizona’s State Implementation Plan (SIP)?

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Arizona’s State Implementation Plan (SIP) is the cumulative record of all air pollution strategies, state statutes, state rules, and local ordinances implemented under Title I of the Clean Air Act by government agencies within Arizona. There is no one “State Implementation Plan” to refer to. Instead, there are multiple revisions to the SIP that are updated and referenced when managing Arizona’s air quality.

Since Arizona’s first SIP submittal in 1972, SIP revisions, statutes, ordinances, and rules are continually being updated by ADEQ’s Air Quality Division’s SIP Section. Once revisions to Arizona’s SIP are approved by the Environmental Protection Agency (EPA) and published in the Federal Register, the SIP becomes enforceable by federal and state government. The contents within the SIP mandate permits and compliance practices.

Why SIPs?

SIPs are used to comply with the Clean Air Act, and to improve air quality for everyone and everything. SIPs outline the approach a state is going to take to bring a geographic area—and the stakeholders who conduct business and operations in the area—into “attainment,” or meeting the national standards for criteria pollutants.

What geographic areas do SIPs apply to?

All of them! For ADEQ, the SIP Section compiles SIP revisions for all counties of Arizona, particularly those outside major cities like Phoenix and Tucson. In addition, local agencies like the Maricopa Association of Governments and the Pima Association of Governments complete SIP revisions for their respective counties and ADEQ submits them to EPA.