The drinking water infrastructure in the United States faces significant underinvestment. The 2009 American Society of Civil Engineers Report Card on America’s Infrastructure gave a D minus for the Nation’s drinking water infrastructure. In a 2007 study, the EPA found a 20-year investment...

We randomized 43 villages in Bangladesh to receive information on well-water arsenic that emphasized water safety relative to the national standard (bright-line message) or provided additional information on how risks from exposure increase with arsenic levels (gradient message). The gradient...