EPA Signals Rollback of Toxic Emissions Rules
The Environmental Protection Agency is poised to roll back rules governing toxic emissions from power plants. The move signals a broader deregulatory shift that could create a complex compliance environment for manufacturers. While federal standards may ease, companies will still need to navigate a patchwork of potentially stricter state-level regulations.
- The rollback specifically reverses the 2024 updates to the Mercury and Air Toxics Standards (MATS), reverting compliance for coal- and oil-fired power plants to the standards first issued in 2012. - The original 2012 MATS rule had significantly reduced power plant pollution, cutting mercury emissions by 90%, acid gas pollution by 96%, and non-mercury metal pollution by 81% by 2021. The now-repealed 2024 update would have further lowered the cap on mercury pollution from coal plants by 70%. - The EPA estimates the reversal will save the utility industry between $78 million and $670 million in annual compliance costs. - A key provision of the 2024 rule that has been eliminated was the mandate for power plants to use and install continuous emissions monitoring systems for particulate matter. - The federal Clean Air Act sets a floor, not a ceiling, for regulation, explicitly allowing states to adopt and enforce their own air pollution standards that are more stringent than federal rules. - However, more than half of U.S. states have laws or regulations that preclude them from adopting environmental measures stricter than federal requirements, or only allow it under special circumstances. - For manufacturers, who are the largest users of electricity, weaker emissions standards on the power sector can lead to higher indirect (Scope 2) greenhouse gas emissions, complicating corporate sustainability reporting and exposure to potential future carbon border adjustments (tariffs). - Increased emissions from the power sector can exert upward pressure on the Social Cost of Carbon (SCC), an economic measure used to quantify the long-term damages of CO2, which could influence future regulatory and investment decisions.
