Coal-fired electricity generation is deemed essential for the reliability and affordability of the nation's power grid, according to a proclamation by President Donald J. Trump. The Federal Government's role in maintaining a secure and reliable power supply is emphasized, with concerns raised about stringent emissions controls potentially undermining this mission.
On May 7, 2024, the Environmental Protection Agency published a final rule under section 112 of the Clean Air Act. This rule amended the existing Mercury and Air Toxics Standards (MATS) to be more stringent, effective from July 8, 2024. Compliance with this rule is required by July 8, 2027.
The new rule imposes significant burdens on coal-fired power plants and could affect the viability of the coal sector. It requires compliance with emissions-control technologies that are not yet commercially viable. The current timeline poses risks of plant shutdowns, job losses, grid instability, and economic threats to energy security.
President Trump has proclaimed an exemption for certain stationary sources subject to this rule for two years beyond its compliance date—until July 8, 2029. During this period, these sources will adhere to previous MATS obligations. The determination was made due to unavailable technology needed for compliance and national security interests.
Facilities affected include Cardinal Units in Ohio operated by Cardinal Operating Company; Craig Generating Station Units in Colorado managed by Tri-State Generation and Transmission Association; and Dallman Unit in Illinois run by City Water, Light and Power.
