In December 2017, EPA issued an Advance Notice of Proposed Rulemaking (ANPRM) to solicit information from the public about a potential future rulemaking to limit greenhouse gas emissions from existing electric utility generating units, commonly called power plants.

The ANPRM did not propose new regulations or requirements; rather, it offered the public the opportunity to comment on specific topics for the Agency to consider in developing a potential future proposed rule.

• Federal Register Notice

• Fact Sheet: ANPRM on State Guidelines for Greenhouse Gas Emissions from Existing Power Plants (PDF)(4 pp, 101 K)