2020 National Municipal Separate Storm Sewer System (MS4) Needs Assessment Survey Results

Based on input from leading stormwater professionals, the Water Environment Federation (WEF) Stormwater Institute (SWI) developed Rainfall to Results: The Future of Stormwater. The report detailed the challenges, opportunities, and pathways to improving the nation’s stormwater systems to make them more efficient, effective, and sustainable. The report also developed a vision for the future of stormwater: Plus, the report identified six objectives that are central to supporting the future of stormwater vision. To begin working toward these objectives, the SWI conducted national assessment surveys of municipal separate storm sewer system (MS4) permittees in 2018 and again in 2020. This report details the results.