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Air Plan Approval; Indiana; Regional Haze Plan for the Second Implementation Period

Environmental Protection Agency

Federal Register summary (shortened to 600 characters)

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…

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Document number
2026-01406
Published
Mon, Jan 26, 2026
Effective
Wed, Feb 25, 2026
First on the line
Oct 10, 2026, 10:00 PM