# 2024-31617: EPA Changes Mind: Louisville Air Still Too Gross

2024-31617, Air Quality Designations; KY; Redesignation of the Kentucky Portion of the Louisville, KY-IN 2015 8-Hour Ozone Nonattainment Area to Attainment, is a Federal Register proposed rule from an unnamed agency published 2025-01-03, effective Comments must be received on or before February 3, 2025. (as of 2026-06-11).

- Canonical: https://policyrisk.com/federal-register/2024-31617
- As of: 2026-06-11
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2024-31617
- Title: Air Quality Designations; KY; Redesignation of the Kentucky Portion of the Louisville, KY-IN 2015 8-Hour Ozone Nonattainment Area to Attainment
- Type: Proposed Rule
- Agencies: unknown
- Citation: unknown
- Published: 2025-01-03
- Effective: Comments must be received on or before February 3, 2025.
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-06-11

## In one line

EPA Changes Mind: Louisville Air Still Too Gross

## Summary

The EPA is saying no to Kentucky’s plan to declare the Kentucky part of the Louisville area as meeting clean air standards for ozone because the area still has pollution problems. This means the area stays on the watch list for ozone pollution, and Kentucky’s plan to keep pollution low isn’t approved yet. People have until February 3, 2025, to share their thoughts on this decision.

## Abstract

The Environmental Protection Agency (EPA) is withdrawing its proposed approval of the request to redesignate the Kentucky portion of the Louisville, Kentucky-Indiana, 2015 8-hour ozone nonattainment area (hereinafter referred to as the "Louisville, KY-IN Area" or "Area") to attainment for the 2015 8-hour ozone National Ambient Air Quality Standards (NAAQS or standards). EPA is withdrawing its April 18, 2023, proposed approval and is now proposing to deny Kentucky's request to redesignate the Kentucky portion of the Area from nonattainment to attainment, based on the Area's violation of the NAAQS. EPA is taking no action at this time on Kentucky's maintenance plan, including the regional motor vehicle emission budgets for nitrogen oxides (NO<INF>X</INF>) and volatile organic compounds (VOC) for the years of 2019 and 2035, submitted with Kentucky's redesignation request for the Louisville, KY-IN Area. The redesignation request and maintenance plan state implementation plan (SIP) revision were submitted by the Commonwealth of Kentucky, through the Kentucky Energy and Environment Cabinet (Cabinet), Division of Air Quality (DAQ), on September 6, 2022.

## Effects PRIA read

- Kentucky Portion Denied Redesignation to Attainment: cost, low. If you live in the Kentucky portion of the Louisville, KY‑IN ozone area, EPA is proposing to deny Kentucky's September 6, 2022 request to redesignate that Kentucky portion from nonattainment to attainment for the 2015 8‑hour ozone standard. EPA says the area's certified 2021–2023 design value is 0.…

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## Sources
- [2024-31617 on federalregister.gov](https://www.federalregister.gov/documents/2025/01/03/2024-31617/air-quality-designations-ky-redesignation-of-the-kentucky-portion-of-the-louisville-ky-in-2015)
- [2024-31617 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-01-03/pdf/2024-31617.pdf)

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Source: PRIA, https://policyrisk.com/federal-register/2024-31617 (as of 2026-06-11).