The main purpose of this legislation, known as the "Clean Ports for Commerce Act," is to ensure that the U.S. Army Corps of Engineers conducts thorough planning before any dredging activities in areas where there is known contamination from perfluoroalkyl and polyfluoroalkyl substances, commonly referred to as PFAS. The goal is to protect water quality and public health from the potential harmful effects of these substances during dredging operations.