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Every day in cities across the country, billions of gallons of municipal wastewater (aka sewage) are treated and discharged into a nearby waterbody. Some of the wastewater is recycled. But, in the scheme of things, the total amount is just a drop in the bucket. Less than 1 percent of U.S. water demand is currently being met through water reuse. There’s plenty of room for expansion as urban population growth, environmental needs, and climate change pressure drinking water supplies of cities across the country, as well as worldwide.