Understanding the Changes to EPA’s Greenhouse Gas Emission Standards for New and Existing Power Plants


In 2019 EPA will finalize changes to the greenhouse gas emission standards for both new and existing powerplants. These standards, first adopted by the Environmental Protection Agency under President Obama, have been updated under President Trump. In this session you will learn about both the Affordable Clean Energy (ACE) Rule for existing power plants and the New Source Performance Standards (NSPS) for new, modified and reconstructed units.   Among other changes, ACE now aligns with past interpretations of the Clean Air Act, allowing states to set the performance standards, while taking into account the individual characteristics of a unit and focusing on changes ‘inside the unit fence line.’   In addition, the proposed NSPS standards no longer rely on the use of carbon capture and storage (CCS) which has not yet developed into an adequately demonstrated technology.  These changes will have important implications as cooperatives plan for their future generating needs.


  • Ted Cromwell – Executive Director, Environment – NRECA               
  • Dan Chartier – Regulatory Director, Environmental Policy – NRECA