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Final ruleTook effect April 9, 2026

Air Plan Approval; North Dakota; Approval of Air Quality Implementation Plans; Regional Haze State Implementation Plan; Regional Haze Five Year Progress Report and Nitrogen Oxides Best Available Retrofit Technology Determination for Coal Creek Station for the First Implementation Period

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register March 10, 2026. Document 2026-04649. Updated Nov. 13, 2026.

What it does

The Environmental Protection Agency (EPA) is approving certain portions of State Implementation Plan (SIP) revisions submitted by the State of North Dakota (North Dakota) on January 12, 2015, and August 11, 2022, to address regional haze. Specifically, the EPA is approving North Dakota's nitrogen oxides (NO<INF>X</INF>) Best Available Retrofit Technology (BART) determination for Coal Creek Station power plant (Coal Creek) for the first implementation period of the regional haze program and North Dakota's five-year regional haze progress report. This action addresses the United States Court of Appeals for the Eighth Circuit's September 23, 2013, vacatur and remand of the portion of EPA's 2012 Regional Haze Federal Implementation Plan (FIP) that promulgated a BART emission limit of 0.13 pounds per million BTU (lb/ MMBtu) NO<INF>X</INF> (30-day rolling average) for Coal Creek. The EPA is taking this action pursuant to the Clean Air Act (CAA).

The Environmental Protection Agency's summary, as published in the Federal Register.

What changed in the regulation

1 part of Title 40 of the Code of Federal Regulations:

40 CFR 52

Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).

Compared with

The Environmental Protection Agency has published 245 final rules in 2026 so far, compared with 263 in all of 2025.

Counted by the Tribune from Federal Register records since Jan. 1, 2025.

What happens next and when

This rule is effective on April 9, 2026.

The agency's dates, word for word.

Document number2026-04649
ActionFinal rule.
AgenciesEnvironmental Protection Agency
PublishedMarch 10, 2026
Effective dateApril 9, 2026
DocketEPA-R08-OAR-2023-0641

Source: the Federal Register (public domain). The document in the Federal Register