Air Plan Approval; Pennsylvania; Harrisburg-Lebanon-Carlisle-York Maintenance Area, Second 10-Year Maintenance Plan for the 2006 Fine Particulate Matter National Ambient Air Quality Standard

What it does

The Environmental Protection Agency (EPA) is proposing to approve under the Clean Air Act (CAA), the Second Maintenance Plan for the Harrisburg-Lebanon-Carlisle and York Maintenance Area (Harrisburg- York Area) for the 2006 Fine Particulate Matter national ambient air quality standard (NAAQS) (Second 10-Year Maintenance Plan) as a revision to the state implementation plan (SIP). The SIP revision, submitted on February 7, 2025 by the Pennsylvania Department of Environmental Protection (PADEP), addresses the second 10-year maintenance period for particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers ([micro]m), commonly known as fine particulate matter or PM<INF>2.5</INF>. The Plan includes, among other elements, a base year emissions inventory, a maintenance demonstration, contingency provisions, and motor vehicle emissions budgets for use in transportation conformity determinations, to ensure the continued maintenance of the 2006 PM<INF>2.5</INF> NAAQS. The EPA is also proposing to find adequate and approve the motor vehicle emission budgets for the Harrisburg-York Area.

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

Written comments must be received on or before August 24, 2026.

The agency's dates, word for word.

Check it yourself

• The document in the Federal Register
• Docket EPA-R03-OAR-2026-1817 on Regulations.gov
• Title 40 on eCFR

The record as published

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