Published January. 13, 2026
The U.S. Environmental Protection Agency on Friday issued a final rule on nitrogen oxide standards for new gas-fired power plants and other stationary turbines. The standards are significantly more lenient than a proposal issued in November 2024 during the Biden administration.
The U.S. Environmental Protection Agency on Friday issued a final rule on nitrogen oxide standards for new gas-fired power plants and other stationary turbines. The standards are significantly more lenient than a proposal issued in November 2024 during the Biden administration.
The EPA determined that the “best systems of emissions reduction,” or BSER, for NOx emissions is the continued use of combustion controls for all but one subcategory of new, modified or reconstructed turbines. The BSER for new large turbines with 12-month capacity factors over 45% is combustion controls combined with post-combustion selective catalytic reduction, or SCR.
The Biden EPA proposed finding that for most combustion turbines, the use of combustion controls plus SCR is the BSER.
The EPA estimated its final new source performance standards for stationary combustion turbines will cut annual NOx emissions by up to 296 tons by 2032 — significantly less than the 2,659 tons the proposed rule was estimated to cut.
The new standards cover facilities that started construction, modification or reconstruction after Dec. 13, 2024. The standards were last updated in 2006.
For more details, visit here.