Data / Federal rules / 2024-04029

Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NNSR): Regulations Related to Project Emissions Accounting

The Environmental Protection Agency published this proposed rule in the Federal Register on May 3, 2024. Comments closed on July 2, 2024.

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What the agency says

In this action, the Environmental Protection Agency (EPA) is proposing revisions to the preconstruction permitting regulations that apply to modifications at existing major stationary sources in the New Source Review (NSR) program under the Clean Air Act (CAA or Act). The proposed revisions include revising the definition of "project" in the NSR regulations, adding additional recordkeeping and reporting requirements applicable to minor modifications at existing major stationary sources, and proposing to require that decreases accounted for in the Step 1 significant emissions increase calculation be enforceable.

Key facts

Document number: 2024-04029
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: May 3, 2024
Comments due: July 2, 2024
Dates: Comments: Comments must be received on or before July 2, 2024.
Docket: EPA-HQ-OAR-2022-0381; FRL-9249-01-OAR
Regulation ID (RIN): 2060-AV62
Code of Federal Regulations: 40 CFR 51; 40 CFR 52
Topics: Air pollution control; Environmental protection
Pages: 36

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on environmental protection · Published in May 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.