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Air Quality Plan; Arizona; Maricopa County Air Quality Department; New Source Review; Emission Reduction Credits-Rule 204
Proposed rule · Federal Register document 2026-20612
- Published
- 10/08/2026
- Comments due
- 11/09/2026
- 11 days left
- Pages
- 4
Summary
Proposed rule.
The U.S. Environmental Protection Agency (EPA) is proposing 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 nonroad engine fleet owners/operators to generate emission reduction credits (ERCs) by either retrofitting their nonroad engines or replacing their nonroad engines with lower-emitting nonroad engines while meeting other Clean Air Act (CAA or "Act") requirements. These ERCs are intended for use as offsets for major stationary sources under the Department's Nonattainment New Source Review (NNSR) program. We are proposing to approve a local rule to allow for the generation of ERCs through voluntary nonroad engine emission reductions under the CAA.
Details
- Type
- Proposed rule
- Agencies
- Environmental Protection Agency
- Docket
- EPA-R09-OAR-2026-4654; FRL-13434-01-R9
- CFR parts
- 40 CFR 52
- Topics
- Air pollution control, Environmental protection, Incorporation by reference, Intergovernmental relations, Nitrogen oxides, Ozone, Reporting and recordkeeping requirements, Volatile organic compounds
This page summarizes a Federal Register document. Only the official Federal Register text has legal effect. Comment deadlines can be extended or reopened by a later notice.
Source: Office of the Federal Register, via the Federal Register API · Last updated 10/08/2026