On April 4, 2025, the comment period begins for the proposed New Source Review (NSR) and PM_2.5 National Ambient Air Quality Standards rulemaking to amend ADEQ's air quality rules (1) to adopt Clean Air Act (CAA) NSR requirements for serious ozone nonattainment areas, (2) to improve the clarity of the minor NSR rules, (3) to cure deficiencies identified by EPA in its March 18, 2015, proposed limited approval/disapproval of a revision to the State Implementation Plan (SIP) designed to update Arizona’s federally approved NSR program, (4) to update its rule establishing the annual ambient air quality standard for PM_2.5 to reflect recent changes by EPA, and (5) to fix typos and incorrect cross-references that the Department has identified in various rules. The comment period ends May 6, 2025.

Review Documents:

• Notice of Proposed Rulemaking (submitted to Secretary of State) | View >
• Rulemaking Page | Learn More >
• Or in person at the ADEQ Record Center | Learn How >

Public Comment Period:

Dates: April 4, 2025 – May 6, 2025

Comments may be submitted as follows:

• By Email | Send Email >     
• By Mail (Must be postmarked or received by May 6, 2025):

ADEQ
Air Quality Division, Air Quality Improvement Planning
Attn: Steve Burr
1110 W. Washington St.
Phoenix, AZ  85007

• At Virtual Public Hearing | May 6, 2025, 1 p.m. | View Details >