PFAS Interagency Research Coordination Strategy Act or the PIRCS Act This bill directs the National Science and Technology Council to establish an interagency working group to coordinate federal activities to advance research and development needed to address perfluoroalkyl and polyfluoroalkyl substances, commonly referred to as PFAS. These substances are man-made and may have adverse human health effects. A variety of products contain the compounds, such as nonstick cookware or weatherproof clothing. The interagency working group shall (1) provide for interagency coordination of federally funded PFAS research and development, and (2) develop and update every two years a strategic plan for federal support for PFAS research and development.