Much of the water we drink in our semi-arid climate comes from the Colorado River, the Owens Valley and the northern part of the state. Much of what's used to irrigate farms, parks, golf courses and freeway medians is recycled sewage, and water experts contend that population growth might require that someday we drink that, too. The Los Angeles Times reports that water agencies want to pump more of this water into groundwater basins and surface reservoirs so it can be used for drinking. Decades of solid science say it's perfectly safe and can be made into water as pure as what comes out of the rivers. Warren Olney speaks with homeowners environmentalists and water-resource experts about the "yuck factor."