# 2026-19668: EPA Approves Kentucky's SO2 Air Plan Update

2026-19668, Air Plan Approval; Kentucky; Campbell-Clermont Area Maintenance Plan for the 2010 1-Hour SO2 NAAQS, is a Federal Register rule from Environmental Protection Agency published 2026-09-25, effective 2026-11-24; PRIA reads it as touching household money (as of 2026-10-02).

- Canonical: https://policyrisk.com/federal-register/2026-19668
- As of: 2026-10-02
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-19668
- Title: Air Plan Approval; Kentucky; Campbell-Clermont Area Maintenance Plan for the 2010 1-Hour SO2 NAAQS
- Type: Rule
- Agencies: Environmental Protection Agency
- Citation: 91 FR 60840
- Published: 2026-09-25
- Effective: 2026-11-24
- Comments close: 2026-10-26
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: none
- Last updated: 2026-10-02

## In one line

EPA Approves Kentucky's SO2 Air Plan Update

## Summary

The EPA is giving a thumbs-up to Kentucky’s updated plan to keep the air clean in part of Campbell County for the next 10 years, focusing on sulfur dioxide pollution. This means the area will continue meeting air quality rules without extra costs or changes for residents and businesses. The new plan kicks in on November 24, 2026, unless someone raises concerns by October 26, 2026.

## Abstract

The U.S. Environmental Protection Agency (EPA or Agency) is approving a State Implementation Plan (SIP) revision submitted by the Commonwealth of Kentucky, through the Kentucky Division for Air Quality (DAQ), on February 20, 2025. The SIP revision includes the second 10- year maintenance plan for the Kentucky portion of the Campbell- Clermont, Kentucky-Ohio maintenance area ("Campbell-Clermont, KY-OH Area" or "Area") for the 2010 1-hour sulfur dioxide (SO<INF>2</INF>) National Ambient Air Quality Standards (NAAQS). The Kentucky portion of the Area is comprised of a part of Campbell County. The EPA is approving Kentucky's second 10-year maintenance plan for the Kentucky portion of the Area because the Commonwealth has demonstrated that it is consistent with the Clean Air Act (CAA or Act).

## Effects PRIA read

- Maintenance of SO2 Air Standard through 2037: benefit, low. The EPA approved Kentucky's second 10-year maintenance plan to keep the Kentucky portion of the Campbell-Clermont area meeting the 2010 1-hour sulfur dioxide (SO2) standard through 2037. This approval becomes effective November 24, 2026 unless adverse comments are received by October 26, 2026, and…
- No New Federal Costs for Small Businesses: benefit, low. EPA states this approval "does not impose additional requirements beyond those imposed by State law," is certified as not having a significant economic impact on a substantial number of small entities under the Regulatory Flexibility Act, and does not create new information-collection burdens. That…
- Contingency Triggers Could Prompt New Controls: cost, low. Kentucky's maintenance plan includes contingency measures that must be triggered and implemented if SO2 levels rise: a warning trigger occurs when an annual 99th-percentile 1-hour SO2 concentration greater than 75 ppb occurs in a single year (prompting a study and controls implemented no later than…

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## Sources
- [2026-19668 on federalregister.gov](https://www.federalregister.gov/documents/2026/09/25/2026-19668/air-plan-approval-kentucky-campbell-clermont-area-maintenance-plan-for-the-2010-1-hour-so2-naaqs)
- [2026-19668 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-09-25/pdf/2026-19668.pdf)

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Source: PRIA, https://policyrisk.com/federal-register/2026-19668 (as of 2026-10-02).