Air Plan Revisions; Arizona; Arizona Department of Environmental Quality; Gila County Reasonably Available Control Technology

What it does

The Environmental Protection Agency (EPA) is proposing to approve, under the Clean Air Act (CAA or "Act"), revisions to the Arizona state implementation plan (SIP) addressing reasonably available control technology (RACT) requirements for the 2015 ozone national ambient air quality standards (NAAQS or "standard") within the Gila County portion of the Phoenix-Mesa ozone nonattainment area. This proposal explains our evaluation of Arizona's SIP submittal and basis for proposing approval.

The Environmental Protection Agency's summary, as published in the Federal Register.

What it would change

1 part of Title 40 of the Code of Federal Regulations:

40 CFR 52

What happens next and when

Comments must be received on or before March 16, 2026.

The agency's dates, word for word.

Check it yourself

• The document in the Federal Register
• Docket EPA-R09-OAR-2025-2961 on Regulations.gov
• Title 40 on eCFR

The record as published

Source: the Federal Register (public domain). The document in the Federal Register