Comment ClosedEPA· Environmental Protection AgencyProposed RuleEPA-R09-OAR-2025-2833Regulations.gov

Air Quality State Implementation Plans; Approvals and Promulgations: Arizona; Phoenix-Mesa Nonattainment Area; Determination of Attainment by the Attainment Date But For International Emissions for the 2015 Ozone National Ambient Air Quality Standards

Introduced November 19, 2025Comment period ends December 20, 2025View on regulations.gov ↗

What This Means

The EPA approves Arizona's air quality implementation plan for the Phoenix-Mesa area regarding ozone standards. This action recognizes international emissions' impact on achieving air quality targets.

Plain language summary generated by AI · Civitics

Community Position

Community Comments

Other Open EPA Proposals

Open for CommentEPA

Rescission of Regulatory Determinations and Removal of Related Provisions for Four PFAS Substances (PFHxS, PFNA, HFPO–DA (GenX), and the Mixture of These Three PFAS Plus PFBS)

→

Open for CommentEPA

Significant New Use Rules on Certain Chemical Substances (26-2)

→

Open for CommentEPA

Virginia: Approval of State Coal Combustion Residuals Permit Program

→

Open for CommentEPA

Begin Actual Construction in the New Source Review Preconstruction Permitting Program

→