Air Plan Approval; District of Columbia; Enhanced Vehicle Emission Inspection and Maintenance (I/M) Program Revision and Basic I/M Program Certification for Moderate Nonattainment Areas Under the 2015 Ozone NAAQS

Open for public comment until Dec. 7, 2026. Comment on Regulations.gov

What it does

The Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the District of Columbia (DC, or the District). This revision incorporates regulatory updates made to the District's Enhanced motor vehicle emissions inspection and maintenance (I/M) program since the EPA's last SIP approval. The SIP revision also serves to certify that the District's existing Enhanced I/M program meets Clean Air Act (CAA) requirements for a Basic I/M program for the District's portion of the Washington, DC-MD-VA nonattainment area (the Washington nonattainment area) for the 2015 Ozone National Ambient Air Quality Standard (NAAQS).

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 December 7, 2026.

The agency's dates, word for word.

Check it yourself

• The document in the Federal Register
• Docket EPA-R03-OAR-2026-1024 on Regulations.gov
• Title 40 on eCFR

The record as published

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