Introduction: Automation and the danger of over productivity have created unprecedented amounts of leisure time in the United States. We are now in the process of finding that major potential recreational areas have been seriously polluted by the by-products of the same automation and productivity which have created our leisure time. Increasing urbanization has been accompanied by progressively more stringent demands on water quality and quantity while steadily impairing the same parameters . One of the major sources of water quality impairment due to concentrated urban growth is combined sewer overflow... / Ph. D.