The main purpose of this legislation is to update and continue funding for municipal grants aimed at managing sewer overflows and promoting the reuse of stormwater. This is part of a broader effort to improve water quality and infrastructure in communities across the United States. Key provisions of the legislation include the authorization of $350 million each year from 2026 to 2031 for these municipal grants. This funding is intended to support projects that help cities and towns better manage excess stormwater and prevent sewer overflows, which can lead to pollution and health hazards.