# Air Plan Approval; Connecticut; State Implementation Plan Revisions Required as a Result of a Definition Change Due to the Ozone Reclassification
> **Rule** · Final rule. · Published 2026-02-26 · Effective 2026-03-30 · 91 FR 9455
## Document
- **Document number:** 2026-03887
- **Category:** air-emissions
- **Federal Register citation:** 91 FR 9455
- **CFR reference:** 40 CFR 52
- **Publication date:** 2026-02-26
- **Effective date:** 2026-03-30
- **State:** CT
- **EPA docket:** EPA-R01-OAR-2025-0196
## Abstract

The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of Connecticut. This action consists of revisions to Regulations of Connecticut State Agencies (RCSA) sections 22a-174-22e and 22a-174-22f, primarily to add compliance dates for sources brought into the applicability of these sections due to a change in the definition of "severe non-attainment area for ozone." The definition change had previously been approved into Connecticut's SIP. This action is being taken in accordance with the Clean Air Act.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/02/26/2026-03887/air-plan-approval-connecticut-state-implementation-plan-revisions-required-as-a-result-of-a)
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