All 50 states are implementing mandates of Total Maximum Daily Load (TMDL) assignments for contaminants likely to impact water in the United States, making water quality management a timely topic. TMDL criteria are a new initiative under the Clean Water Act and of critical importance to agricultural producers and state and federal regulators. Unfortunately, few precedents for assignment of pollutant maxima exist. This volume will show what one state (Mississippi) is doing to determine the most cost-effective and reliable practices for reducing the potential for non-point source pollution of U.S. waters. Readers may be able to apply some of the lessons learned in the Mississippi Delta Management Systems Evaluation Area (MDMSEA) to their own region.