Would you drink water that came from a toilet? The imagery
isn’t appealing. Even knowing that the water, once treated, may be cleaner than
what comes out of most faucets, many people are disgusted by the idea. But in
places like Singapore and Namibia, limited supplies of freshwater are being
augmented by adding highly treated wastewater to their drinking water. As
climate change and population growth strain freshwater resources, such
strategies are likely to become more common around the world, and in the United
States.