EPA announced the latest efforts to protect communities and the environment from the health risks posed by certain per- and polyfluoroalkyl substances (PFAS). PFAS are widely used, long-lasting chemicals that break down very slowly over time, and they have been used in many different consumer, commercial and industrial products. Scientific studies show that some PFAS exposure is linked to harmful health effects. EPA is proposing two rules that would add to the agency's comprehensive approach to tackling PFAS pollution across the country. EPA is proposing to modify the definition of hazardous waste as it applies to cleanups at permitted hazardous waste facilities. This modification would assure that EPA's regulations clearly reflect EPA's and authorized states' authority to require cleanup of the full range of substances that the Resource Conservation and Recovery Act (RCRA) intended. Currently, the regulations do not clearly and accurately reflect the full authorities granted to EPA by Congress. EPA is also proposing to amend its RCRA regulations to add multiple PFAS compounds as hazardous constituents. These PFAS would be added to the list of substances identified for consideration in facility assessments and, where necessary, further investigation and cleanup through the corrective action process at hazardous waste treatment, storage and disposal facilities.