Air Plan Approval; Ohio; Second Maintenance Plan for 2008 Ozone NAAQS

What it does

The Environmental Protection Agency (EPA) is approving revisions to the Ohio State Implementation Plan (SIP). On November 6, 2024, the Ohio Environmental Protection Agency (Ohio EPA) submitted the State's plans for maintaining the 2008 ozone National Ambient Air Quality Standard (NAAQS or standard) in the Columbus, Ohio; Cleveland- Akron-Lorain, Ohio; and Cincinnati, Ohio-Kentucky-Indiana areas. The EPA is approving these maintenance plans because they provide for the maintenance of the 2008 ozone NAAQS for each area for 10 additional years as required by the Clean Air Act (CAA). The EPA is also finding adequate and approving the motor vehicle emission budgets for each area. This approval makes certain commitments related to maintenance of the 2008 ozone NAAQS in these areas federally enforceable as part of the Ohio SIP.

The Environmental Protection Agency's summary, as published in the Federal Register.

What changed in the regulation

1 part of Title 40 of the Code of Federal Regulations:

40 CFR 52

Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).

Compared with

The Environmental Protection Agency has published 248 final rules in 2026 so far, compared with 263 in all of 2025.

Counted by the Tribune from Federal Register records since Jan. 1, 2025.

What happens next and when

This final rule is effective on March 16, 2026.

The agency's dates, word for word.

Check it yourself

• The document in the Federal Register
• Docket EPA-R05-OAR-2024-0538 on Regulations.gov
• Title 40 on eCFR

The record as published

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