This joint discussion on waste disposal at water treatment plants was presented at the 1966 AWWA Annual Conference at Bal Harbor, Florida. Discussion topics and their presenters are as follows: Introduction, by William W. Aultman of James M. Montgomery Construction Engineering, Inc., Pasadena, California; Problem of Pollution, by Louis R. Howson of Alvord, Burdick & Howson, Chicago, Illinois; Influence of State Quality Standards, by Walter A. Lyon of the Division of Sanitary Engineering, and Donald A. Lazarchik of the Industrial Wastes Section, Pennsylvania Department of Health, Harrisburg, Pennsylvania; Federal Pollution Control by H. W. Poston, of the U.S. Department of the Interior, Chicago, Illinois; and, Detroit's Waste Water Problems, by Gerald J. Remus of the Department of Water Supply, Detroit, Michigan.