S. 820 would add the Consumer Product Safety Commission (CPSC) to the list of agencies required to participate in the per- and polyfluoroalkyl substances (PFAS) interagency working group that was established in the William M. (Mac) Thornberry National Defense Authorization Act for Fiscal Year 2021 to coordinate federal activities related to PFAS. Because CPSC already participates in the group, CBO estimates that enacting S. 820 would have no effect on the federal budget.