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EPA is developing a proposal to add certain per- and polyfluoroalkyl substances (PFAS) subject to reporting under section 313 of the Emergency Planning and Community Right-to-Know Act (EPCRA) and section 6607 of the Pollution Prevention Act (PPA) to the list of Lower Thresholds for Chemicals of Special Concern (Chemicals of Special Concern). Due to the widespread use of PFAS and their persistence in the environment, or in some cases the persistence of their degradation products, even concentrations below de minimis levels can contribute significantly to environmental loading. The addition of the PFAS to the Chemicals of Special Concern list will eliminate the use of the de minimis exemption, eliminate the option to use Form A, and will limit the use of range reporting. In addition, EPA is proposing to eliminate the use of the de minimis exemption under the Supplier Notification Requirements for facilities that manufacture, or process all chemicals included on the Chemicals of Special Concern list. The elimination of the de minimis exemption for supplier notification purposes will help facilities to identify potential sources of PFAS and other Chemicals of Special Concern. EPA believes that the addition of the PFAS to the Chemicals of Special Concern list and the elimination of the de minimis exemption under the Supplier Notification Requirements for PFAS and other Chemicals of Special Concern will result in a more complete picture of the releases and waste management quantities for these chemicals.