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Share of existing coal fleet with pollution controls in the United States from 1995 to 2022, by type

Characteristic	Coal with FGD	Coal with SCR
2022	82.4%	57.9%
2021	82.5%	57.1%
2020	82.9%	56.3%
2019	83%	55%
2018	81.6%	54.2%
2017	81.3%	52.5%
2016	77.8%	49.4%
2015	72.5%	46.5%
2014	69.6%	45.4%
2013	66.4%	43%
2012	62.6%	41%
2011	60.1%	38.8%
2010	57.5%	38%
2009	51.3%	35.4%
2008	43.1%	32.8%
2007	37.1%	31.3%
2006	33%	29.2%
2005	31.6%	27.5%
2004	31.1%	25.5%
2003	30.9%	20.3%
2002	30.8%	8.8%
2001	30.1%	4.6%
2000	29.2%	1.8%
1999	29.1%	0.6%
1998	28.4%	0.5%
1997	27.3%	0.4%
1996	26.8%	0.3%
1995	26.5%	0.2%

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Release date

August 2024

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Region

United States

Survey time period

1995 to 2022

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The installation of state of the art air pollution controls at existing U.S. coal-fired power plants has increased significantly over the past three decades. As of 2022, roughly 82 percent of the existing U.S. coal fleet were retrofitted with flue gas desulfurization (FGD) controls. Also known as scrubbers, these technologies are used by power plants to reduce emissions of air pollutants such as nitrogen oxides (NOx) and Sulfur dioxide (SO₂). Meanwhile, 58 percent of coal plants had been retrofitted with selective catalytic reduction (SCR). Such technologies have helped significantly reduce NOx and SO₂ emissions from electric utilities. Nevertheless, there are still numerous operational coal power plants that remain uncontrolled.

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