Air Plan Revisions; Arizona; Maricopa County Air Quality Department; New Source Review; Emission Reduction Credits
Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register Nov. 5, 2026. Document 2026-22647. Updated Nov. 7, 2026.
- What it does
The U.S. Environmental Protection Agency (EPA) is taking final action to approve a revision to the Maricopa County Air Quality Department (MCAQD or "Department") portion of the Arizona State Implementation Plan (SIP). This revision establishes a federally enforceable program allowing for the generation of emission reduction credits (ERCs) by retrofitting or replacing existing on-road vehicles with lower emitting vehicles while meeting other Clean Air Act (CAA or "Act") requirements. These ERCs are intended to be used as offsets for major stationary sources under the Department's Nonattainment New Source Review (NNSR) program. The EPA is approving this SIP revision because we find that it meets the applicable CAA requirements.
The Environmental Protection Agency's summary, as published in the Federal Register.
- What changed in the regulation
1 part of Title 40 of the Code of Federal Regulations:
- Compared with
The Environmental Protection Agency has published 243 final rules in 2026 so far, compared with 263 in all of 2025.
Counted by the Tribune from Federal Register records since Jan. 1, 2025.
- What happens next and when
This rule is effective December 7, 2026.
The agency's dates, word for word.
The record as published
| Document number | 2026-22647 |
|---|---|
| Action | Final rule. |
| Agencies | Environmental Protection Agency |
| Published | Nov. 5, 2026 |
| Effective date | Dec. 7, 2026 |
| Docket | EPA-R09-OAR-2026-1684 |
Source: the Federal Register (public domain). The document in the Federal Register