Welcome to the Environmental Law Institute’s Resource Center for the listing of impaired waters and development and implementation of Total Maximum Daily Loads (TMDLs). This website is intended to provide everyone, from the interested citizen to seasoned practitioners, easier access to the documents, innovative ideas, practical examples, and contacts central to effective restoration and protection of America’s waters.
Library: Browse document collections, research and analysis tools, reports on technical and programmatic innovations, and more.
CWA 303(d) Training Workshops: ELI annually convenes staff from state and territorial CWA 303(d) programs and tribal water quality programs from across the country to address means of improving program function and outcomes. Access materials from these training workshops, including presentations, related documents, and detailed reports of the proceedings.
Water Quality Data Management Training Workshops: ELI periodically convenes state, territorial, and tribal staff from across the country to improve their skills with and learn about developments in data management and sharing tools in support of CWA 303(d), CWA 305(b), and water quality monitoring and assessment programs. Access materials from these training workshops, including presentations, related documents, and detailed reports of the proceedings.
The CWA 303(d) and 319 Protection Learning Exchange: In July of 2022, ELI convened water quality staff from states, tribes, and the EPA to to discuss approaches to protecting healthy waters, facilitate peer-to-peer learning through the sharing of experiences, identify protection-based measures of success that could be used to track water quality protection efforts in CWA 303(d) and 319 programs, and identify methods of communicating the progress and results of water quality protection efforts. Access materials from this event, including presentations, related documents, and a report of the proceedings.
Connect with Your Local Program: Find out more about what is going on in your state or territory and whom to contact regarding impaired waters listing or TMDLs.