Air Plan Approval; Wisconsin; Moderate Attainment Plan Elements for Wisconsin's 2015 Ozone Standard Areas

What it does

The U.S. Environmental Protection Agency (EPA) is approving portions of Wisconsin's 2015 ozone National Ambient Air Quality Standard (NAAQS or standard) Moderate nonattainment area State Implementation Plan (SIP) submission for the Wisconsin portion of the Chicago, Illinois-Indiana-Wisconsin area (Kenosha County), the Milwaukee, Wisconsin area, and the Sheboygan County, Wisconsin area. The elements of the Moderate SIP submissions include the reasonable further progress (RFP) demonstration and the associated motor vehicle emissions budgets (Budgets) for 2023, the motor vehicle inspection and maintenance (I/M) program, and the nonattainment new source review (NNSR) program. The EPA is also approving the base year emissions inventory as satisfying previous Marginal area requirements for these areas. The EPA is finding adequate and approving the Budgets for these areas. The EPA proposed to approve this action on April 2, 2026, and received no adverse comments.

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 243 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 September 21, 2026.

The agency's dates, word for word.

Check it yourself

• The document in the Federal Register
• Docket EPA-R05-OAR-2025-0170 on Regulations.gov
• Title 40 on eCFR

The record as published

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