Data / Federal rules / 2024-18570

Conditional Approval of Arizona State Implementation Plan Revisions; Maricopa County Air Quality Department; Mobile Source Emission Reduction Credits

The Environmental Protection Agency published this proposed rule in the Federal Register on August 22, 2024. Comments closed on September 23, 2024.

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What the agency says

The Environmental Protection Agency (EPA) is proposing to conditionally approve a revision to the Maricopa County Air Quality Department's (MCAQD or "Department") portion of the Arizona State Implementation Plan (SIP). This rule revision establishes a program allowing fleet owners/operators to generate emission reduction credits (ERCs) by either retrofitting or replacing existing fleet vehicles with lower emitting vehicles and meeting other ongoing requirements. These ERCs are intended for use as offsets under the Department's nonattainment New Source Review (NNSR) program. We are taking comments on this proposal and plan to follow with a final action.

Key facts

Document number: 2024-18570
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: August 22, 2024
Comments due: September 23, 2024
Dates: Comments must be received on or before September 23, 2024.
Docket: EPA-R09-OAR-2024-0311; FRL-12092-01-R9
Code of Federal Regulations: 40 CFR 52
Topics: Administrative practice and procedure; Air pollution control; Environmental protection; Incorporation by reference; Intergovernmental relations; Nitrogen dioxide; Ozone; Reporting and recordkeeping requirements; Volatile organic compounds
Pages: 4

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on administrative practice and procedure · Rules on air pollution control · Rules on environmental protection · Published in August 2024

Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.