National Tribal Air Association
EPARulemakingEPA-HQ-OAR-2018-0794

National Emission Standards for Hazardous Air Pollutants: Coal- and Oil-Fired Electric Utility Steam Generating Units - Additional Post-Promulgation Actions

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Last modified
Dec 18, 2025
Comment window
closed 351d ago
National Tribal Air Association filings
3

Activity

National Tribal Air Association filed 3 comments on this docket between Apr 19, 2019 and Jun 20, 2023. 129 other organizations filed here. The comment window closed 351d ago.

What National Tribal Air Association filed (3)

Jun 20, 2023· Comment submitted by National Tribal Air Association (NTAA)· EPA-HQ-OAR-2018-0794-5894

Filed on regulations.gov — full text not in the inline record.

Apr 25, 2019· Comment submitted by Wilfred J. Nabahe, Chairman, National Tribal Air Association (NTAA)· EPA-HQ-OAR-2018-0794-1200

Filed on regulations.gov — full text not in the inline record.

Apr 19, 2019· Comment submitted by Wilfred J. Nabahe, Chairman, National Tribal Air Association (NTAA)· EPA-HQ-OAR-2018-0794-1155

Filed on regulations.gov — full text not in the inline record.

Abstract

The U.S. Environmental Protection Agency is proposing to repeal specific amendments to the National Emission Standards for Hazardous Air Pollutants for Coal- and Oil-Fired Electric Utility Steam Generating Units (EGUs), commonly referred to as the Mercury and Air Toxics Standards (MATS), that were promulgated on May 7, 2024. The amendments that the EPA is proposing to repeal include the revised filterable particulate matter (fPM) emission standard, which serves as a surrogate for non-mercury hazardous air pollutant (HAP) metals for existing coal-fired EGUs; the revised fPM emission standard compliance demonstration requirements; and the revised mercury (Hg) emission standard for lignite-fired EGUs.

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