Finding of Failure To Attain and Reclassification of Tribal Portions of the Greater Connecticut Ozone Nonattainment Area as Serious for the 2015 Ozone National Ambient Air Quality Standards

What it does

The Environmental Protection Agency (EPA) is finalizing its finding that the tribal portions of the Greater Connecticut area (the Mashantucket Pequot Tribal Nation and the Mohegan Indian Tribe) did not attain the 2015 ozone National Ambient Air Quality Standards (NAAQS) by the attainment date and a reclassification of those portions of the area to Serious nonattainment for the 2015 ozone NAAQS. Additionally, the EPA is taking final action on an exceptional events request submitted by CT DEEP on July 1, 2024, and the EPA's July 22, 2024 concurrence and nonconcurrence with CT DEEP's request. This final action fulfills the EPA's statutory obligation to determine whether the Mashantucket Pequot Tribal Nation and the Mohegan Indian Tribe's portions of the Greater Connecticut area attained the NAAQS by the attainment date. This action is being taken in accordance with the Clean Air Act.

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 81

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 245 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 rule is effective on May 26, 2026.

The agency's dates, word for word.

Check it yourself

• The document in the Federal Register
• Docket EPA-R01-OAR-2024-0325 on Regulations.gov
• Title 40 on eCFR

The record as published

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