This Roundtable discussion took place at AWWA's 1991 annual conference in Philadelphia, Pa. Panel moderator was Frederick A, Marrocco, water supplies division chief at the Pennsylvania Department of Environmental Resources, Executive House, 2nd and Chestnut Streets, Room 514, Harrisburg, PA 17101. Other participants were Peter L. Cook, deputy director of the Office of Ground Water and Drinking Water, US Environmental Protection Agency, 401 M St. S. W, Washington, DC 20460: Gerald R. Iwan, chief of water supplies, State of Connecticut Department of Health Services, 150 Washington St., Hartford, CT 06106; Erik Olson, Natural Resources Defense Council, 1350 New York Ave. N. W., Washington, DC 20005 (at the time of this Roundtable counsel for the Environmental Quality Division, National Wildlife Federation, Washington, D. C); Richard Sawey, director of water and wastewater for the City of Fort Worth, 1000 Throckmorton, Fort Worth, TX 76101; and A.T. Rolan, director of water resources for the City of Durham, 101 City Hall Plaza, Durham, NC 27701