The purpose of this legislation is to simplify the process for upgrading public water systems and treatment facilities by waiving certain regulatory requirements. Specifically, it aims to make it easier for entities to carry out projects focused on improving water infrastructure without getting bogged down by additional historic preservation regulations. The key provision of this legislation allows for the waiver of section 106 requirements under the National Historic Preservation Act for projects that are primarily aimed at rehabilitating or upgrading public water systems or treatment works.