# 2026-01406: Indiana's Regional Haze Plan Gets EPA's Clear Skies Nod

2026-01406, Air Plan Approval; Indiana; Regional Haze Plan for the Second Implementation Period, is a Federal Register rule from Environmental Protection Agency published 2026-01-26, effective 2026-02-25 (as of 2026-06-11).

- Canonical: https://policyrisk.com/federal-register/2026-01406
- As of: 2026-06-11
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-01406
- Title: Air Plan Approval; Indiana; Regional Haze Plan for the Second Implementation Period
- Type: Rule
- Agencies: Environmental Protection Agency
- Citation: 91 FR 3057
- Published: 2026-01-26
- Effective: 2026-02-25
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-06-11

## In one line

Indiana's Regional Haze Plan Gets EPA's Clear Skies Nod

## Summary

The EPA just gave a thumbs-up to Indiana’s updated plan to clear up regional haze and keep the air fresh in special natural areas. This plan, effective February 25, 2026, helps Indiana meet clean air goals without extra costs for businesses or residents. It’s all about making sure everyone enjoys clearer skies while protecting the environment for years to come.

## Abstract

The Environmental Protection Agency (EPA) is approving the Regional Haze State Implementation Plan (SIP) revision for Indiana submitted by the Indiana Department of Environmental Management (IDEM or Indiana) on December 29, 2021, as satisfying applicable requirements under the Clean Air Act (CAA) and EPA's Regional Haze Rule (RHR) for the program's second implementation period. Indiana's SIP submission addresses the requirement that States must periodically revise their long-term strategies for making reasonable progress towards the national goal of preventing any future, and remedying any existing, anthropogenic impairment of visibility, including regional haze, in mandatory Class I Federal areas. Indiana's SIP submission also addresses other applicable requirements for the second implementation period of the regional haze program. EPA is taking this action pursuant to sections 110 and 169A of the CAA.

## Effects PRIA read

- EPA Approves Indiana Regional Haze SIP: benefit, low. The EPA is approving Indiana’s 2021 Regional Haze State Implementation Plan (SIP) for the second implementation period and finalized that approval effective February 25, 2026. The approval finds Indiana’s SIP meets Clean Air Act requirements (sections 110 and 169A) and the Regional Haze Rule (40 CF…
- EPA Adopts New URP Presumption Policy: benefit, medium. EPA is affirming a policy that, for the second implementation period, if a Class I Federal area impacted by a State is below the Uniform Rate of Progress (URP) for 2028 and the State has considered the four statutory factors (costs, time, energy/non-air impacts, and remaining useful life), EPA will…
- EPA Finds Key Indiana Sources Effectively Controlled: benefit, medium. EPA determined that multiple large Indiana sources reviewed (including Duke-Gibson Units 1–5, Alcoa-Warrick Units 1–4, AEP-Rockport MB1 and MB2, IKEC-Clifty Creek Units 1–6, and Duke-Cayuga Units 2 and 3) are ‘‘effectively controlled’’ for the second implementation period, and that site-specific fo…
- Consent Decree Ends Operations at Lehigh/Heidleberg Kilns: cost, medium. EPA notes that pursuant to an amended Federal consent decree, Lehigh (now Heidelberg Materials US Cement LLC-Mitchell Plant) will permanently end operations of Kilns 1, 2, and 3 by the end of 2025, and that future new kilns will install and operate selective catalytic reduction (SCR) and meet the N…

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## Sources
- [2026-01406 on federalregister.gov](https://www.federalregister.gov/documents/2026/01/26/2026-01406/air-plan-approval-indiana-regional-haze-plan-for-the-second-implementation-period)
- [2026-01406 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-01-26/pdf/2026-01406.pdf)

## Related
- [Previous: 2026-01400, Drawbridge Operation Regulation; Technical Amendment; Removal of Obsolete Drawb…](https://policyrisk.com/federal-register/2026-01400)
- [Next: 2026-01408, Air Plan Approval; Oklahoma; Revisions to Air Pollution Control Rules](https://policyrisk.com/federal-register/2026-01408)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-01406 (as of 2026-06-11).